General Model FLXA202

Specifications 2-Wire Analyzer

GS 12A01A03-01EN

n General
The model FLXA 202 2-Wire Analyzer, one model
TM

of FLEXA series, offers single or dual sensor

TM

measurement. The modular-designed analyzer offers 4

kinds of measurements – pH/ORP (oxidation-reduction
potential), contacting conductivity (SC), inductive
conductivity (ISC) or dissolved oxygen (DO) – with the
respective sensor module.
For dual sensor measurement, the combination of
two same type sensor inputs – pH/ORP and pH/ORP
(analog sensor only), SC and SC, and DO and DO –
are available with two sensor modules. Dual sensor
measurement offers additional functionalities; calculated
data function and redundant system.
Variety of calculated data from two measuring
parameters is selectable for each measurement.
On the redundant system built on two measuring
parameters of two sensor inputs, main output
parameter is automatically switched over to the
second sensor output in case of the main sensor’s
failure condition.
Addition to conventional analog pH/ORP sensors, the
analyzer FLXA202 can be connected to Yokogawa’s
digital sensor, FU20F / FU24F / SC25F Digital pH/
ORP SENCOM Sensor.
TM

In the FLXA202 Human Machine Interface (HMI),

2-wire type analyzer FLXA202 offers easy touch
screen operation and simple menu structure in 12
languages. Menus of display, execution and setting
are displayed in a selected language.
The analyzer FLXA202 automatically recognizes the
installed sensor module and prepares the necessary
menus for right configuration, even for dual sensor n Features
measurement.
• 4 kinds of measurements; pH/ORP, SC, ISC and DO
For immediate measurement, the FLXA202 offers • Dual sensor measurement on 2-wire type analyzer;
quick setup functionality. The quick setup screen pH/ORP and pH/ORP, SC and SC, and DO and DO
appears when the analyzer is powered. Only a • Calculated data from dual sensor measurement
few setups – date/time, language, basic sensor • Redundant system on dual sensor measurement
configurations and output – will start the measurement. • Connection of FU20F / FU24F / SC25F Digital pH/
ORP SENCOM Sensor
• Easy touch screen operation on 2-wire type analyzer
The FLXA202 offers the best accuracy in
• Simple HMI menu structure in 12 languages
measurement with temperature compensation
• Quick setup menu for immediate measurement
functionality and calibration functionality. Sensor
• Indication of sensor wellness
diagnostics and sensor wellness indication make
• Enclosure – aluminum alloy cast.
measurement reliable. Logbook of events and
diagnostic data is a useful information source for
maintenance.

For the wide range of industrial environment, the

FLXA202 is designed with the enclosure of aluminum
alloy cast with corrosion-resistant coating.

FLEXA, FLXA, SENCOM are trademarks or registered trademarks of Yokogawa Electric Corporation.
All other company and product names mentioned in this document are trademarks or registered trademarks of their respective companies.
We do not use TM or ® mark to indicate those trademarks or registered trademarks in this document.

Yokogawa Electric Corporation GS 12A01A03-01EN

2-9-32, Nakacho, Musashino-shi, Tokyo, 180-8750 Japan ©Copyright Sep. 2015
7th Edition Mar. 23, 2018
 2
n General Specifications Temperature
with Pt1000, 6.8k, PTC10k, NTC 8k55, 3k Balco,
1. Basic PTC500
Linearity: ±0.3 ºC
■ Measurement Object/Sensor Type
Repeatability: ±0.1 ºC
• pH/Oxidation-reduction Potential (pH/ORP) (analog
Accuracy: ±0.3 ºC
sensor)
with Pt100
• Conductivity (SC)
Linearity: ±0.4 ºC
• Inductive Conductivity (ISC)
Repeatability: ±0.1 ºC
• Dissolved Oxygen (DO)
Accuracy: ±0.4 ºC
• pH/Oxidation-reduction Potential (pH/ORP) (digital
sensor) 2-2. Conductivity (SC)
Note: The available measurement object depends on a ■ Input Specification
sensor module installed on the analyzer. Two or four electrodes measurement with square
■ Analyzer Structure wave excitation, using max 60m (200ft) cable (WU40/
Module structure WF10) and cell constants from 0.005 to 50.0 cm-1
● Composition of Analyzer ■ Input Range
One (1) Housing assembly Conductivity:
One (1) or two (2) Sensor modules min.: 0 µS/cm
● Combination of Sensor Module when two max.: 200 mS x (Cell constant)
modules are installed (over range 2000 mS/cm)
Combinations of two same sensor modules are Resistivity:
available; min.: 0.005 kΩ / (Cell constant)
pH/ORP and pH/ORP (analog sensor) max.: 1000 MΩ x cm
SC and SC Temperature:
DO and DO Pt1000: -20 to 250 ºC
Pt100: -20 to 200 ºC
2. Measurement Ni100: -20 to 200 ºC
2-1. pH/Oxidation-reduction Potential (pH/ORP) NTC 8k55: -10 to 120 ºC
with analog sensors Pb36(JIS NTC 6k): -20 to 120 ºC
■ Input Specification ■ Output Range
Dual high impedance input (≥1012 Ω) Conductivity:
min. 0.01 µS/cm
■ Input Range max. 2000 mS/cm (max 90% zero
pH: -2 to 16 pH (with option /K: 0 to 14 pH) suppression)
ORP: -1500 to 1500 mV Resistivity:
rH: 0 to 100 rH min. 0.001 kΩ x cm
Temperature: max. 1000 MΩ x cm (max 90% zero
Pt1000: -30 to 140 ºC suppression)
Pt100: -30 to 140 ºC Temperature:
6.8k: -30 to 140 ºC min. span 25 ºC
PTC10k: -30 to 140 ºC max. span 270 ºC
NTC 8k55: -10 to 120 ºC
3k Balco: -30 to 140 ºC ■ Performance (Accuracy)
PTC500: -30 to 140 ºC (The specifications are expressed with simulated
inputs.)
■ Output Range Conductivity
pH: min. span 1 pH 2 µS x K cm-1 to 200 mS x K cm-1
max. span 20 pH Accuracy: ±0.5%F.S.
ORP: min. span 100 mV 1 µS x K cm-1 to 2 µS x K cm-1
max. span 3000 mV Accuracy: ±1%F.S.
rH: min. span 2 rH Resistivity
max. span 100 rH 0.005kΩ / K cm-1 to 0.5MΩ /K cm-1
Temperature: min. span 25 ºC Accuracy: ±0.5%F.S.
max. span 170 ºC 0.5MΩ / K cm-1 to 1MΩ /K cm-1
■ Performance (Accuracy) Accuracy: ±1%F.S.
(The specifications are expressed with simulated Temperature
inputs.) with Pt1000, Pb36, Ni100
pH Accuracy: ±0.3 ºC
Linearity: ±0.01 pH with Pt100, NTC 8k55
Repeatability: ±0.01 pH Accuracy: ±0.4 ºC
Accuracy: ±0.01 pH Temperature compensation
ORP NaCl table: ±1 %
Linearity: ±1 mV Matrix: ±3 %
Repeatability: ±1 mV Step response: 90 % (< 2 decades) in 7 seconds
Accuracy: ±1 mV Note: "F.S." means maximum setting value of analyzer output.
"K" means cell constant.
YOKOGAWA provides conductivity sensors of which
cell constants are 0.1 to 10 cm-1.

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 3
2-3. Inductive Conductivity (ISC) ■ Output Range
■ Input Specification DO concentration:
Compatible with the Yokogawa inductive conductivity mg/l (ppm):
ISC40 series with integrated temperature sensor: min.: 1 mg/l (ppm)
NTC30k or Pt1000. max.: 50 mg/l (ppm)
ppb:
■ Input Range min.: 1 ppb
Conductivity: 0 to 2000 mS/cm at 25 ºC reference max.: 9999 ppb
temperature. % saturation:
Temperature: -20 to 140 ºC min.: 10 %
Cable length: max.: 600 %
max. 60 meters total length of fixed sensor Temperature:
cable + WF10(J) extension cable. min. span 25 ºC
Influence of cable can be adjusted max. span 170 ºC
by doing an AIR CAL with the cable
connected to a dry cell. ■ Performance (Accuracy)
(The specifications are expressed with simulated
■ Output Range inputs.)
Conductivity: Performance in ppm mode:
min. span: 100 µS/cm Linearity: ±0.05 ppm or ±0.8% F.S., whichever is
max. span: 2000 mS/cm (max 90% zero greater
suppression) Repeatability: ±0.05 ppm or ±0.8% F.S., whichever
Temperature: is greater
min. span 25 ºC Accuracy: ±0.05 ppm or ±0.8% F.S., whichever is
max. span 160 ºC greater
■ Performance (Accuracy) Performance in ppb mode:
(The specifications are expressed with simulated Linearity: ±1 ppb or ±0.8% F.S., whichever is
inputs.) greater
(Output span is 0-100 µS/cm or more) Repeatability: ±1 ppb or ±0.8% F.S., whichever is
Conductivity: greater
Linearity: ±(0.4 %F.S. + 0.3 µS/cm) Accuracy: ±1 ppb or ±0.8% F.S., whichever is
Repeatability: ±(0.4 %F.S. + 0.3 µS/cm) greater
Temperature: ±0.3 ºC Temperature
Step response: 90 % (< 2 decades) in 8 seconds Linearity: ±0.3 ºC
Note: "F.S." means maximum setting value of analyzer Repeatability: ±0.1 ºC
output. Accuracy: ±0.3 ºC
2-4. Dissolved Oxygen (DO) Note: "F.S." means maximum setting value of analyzer
output.
■ Input Specification
The FLXA202 accepts output from membrane 2-5. pH/Oxidation-reduction Potential (pH/ORP)
covered Dissolved Oxygen sensors. These sensors with digital sensor, FU20F pH/ORP SENCOM
can be Galvanic type, where the sensor generates Sensor
its own driving voltage or Polarographic type, where ■ Input Specification
the sensor uses external driving voltage from the Bi-directional digital communication (RS-485)
converter. between FU20F and FLXA202
The input range is 0 to 50 µA for Galvanic sensors ■ Input Range (depending on FU20F)
and 0 to 1 µA for Polarographic sensors. pH: 0 to 14 pH
For temperature compensation, the FLXA202 ORP: -1500 to 1500 mV
accepts Pt1000 (DO30 sensor) and NTC22k rH: 0 to 100 rH
elements (OXYFERM and OXYGOLD sensors). Temperature: -10 to 105 ºC
■ Input Range ■ Output Range
Dissolved Oxygen: 0 to 50 mg/l (ppm) pH: min. span 1 pH
Temperature: -20 to 150 ºC max. span 20 pH
DO30G sensor: ORP: min. span 100 mV
Measurement range: 0 to 20 mg/l (ppm) max. span 3000 mV
Temperature: 0 to 40 ºC rH: min. span 2 rH
Hamilton sensors: max. span 100 rH
Oxyferm: Temperature: min. span 25 ºC
Measurement range: 10 ppb to 40 ppm max. span 170 ºC
Temperature range: 0 to 130 ºC
Oxygold G:
Measurement range: 2 ppb to 40 ppm
Temperature range: 0 to 130 ºC
Oxygold B:
Measurement range: 8 ppb to 40 ppm
Temperature range: 0 to 100 ºC

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 4
3. Electrical ● Maximum Load Resistance
pH/ORP (analog sensor), SC and DO:
■ Output Signal
Refer to the Figure 1.
General: One output of 4-20 mA DC
Note: Tolerance: ±0.02 mA ISC and pH/ORP SENCOM sensor:
Bi-directional HART digital communication, Refer to the Figure 2.
superimposed on mA (4-20mA) signal ■ Display
Output function: LCD with a touch screen:
Linear or Non-linear (21-step table) Black/White: 213 x 160 pixels
Burn out function: (NAMUR 43 except ISC) Contrast adjustment available on the touch screen
Without HART/PH201G: Message language:
Down: 3.6 mA 12 (English, Chinese, Czech, French,
(signal: 3.8 to 20.5 mA for pH/ORP, SC German, Italian, Japanese, Korean,
and DO) Polish, Portuguese, Russian and Spanish)
(signal: 3.9 to 20.5 mA for ISC) One analyzer has all 12 languages.
Up: 22mA Note: Description for a selection of language and
With HART/PH201G: language names are written in English.
Down: 3.6 mA for pH/ORP, SC and DO Note: Only English alphabet and numeric are available
for a tag number, an additional description for each
Down: 3.9 mA for ISC value on the display screen and passwords.
(signal: 3.8 to 20.5 mA for pH/ORP, SC Note: Only for message language on the screen, 12
and DO) languages are provided.
(signal: 3.9 to 20.5 mA for ISC)
Up: 22mA 4. Mechanical and others
■ Power Supply ■ Housing
Nominal 24 V DC loop powered system Case, Cover:
One (1) Sensor module (1 input): • Aluminum alloy cast + epoxy coating
16 to 40V DC (for pH/ORP (analog • Aluminum alloy cast + urethane coating
sensor), SC and DO) • Aluminum alloy cast + high anti-corrosion
17 to 40V DC (for ISC) coating
21 to 40V DC (for pH/ORP SENCOM Color: Silver gray
sensor) Protection: IP66 (except Canada), NEMA Type 4X
Two (2) Sensor modules (2 inputs): (USA), CSA Type 3S/4X (Canada)
22.8 to 40V DC (for pH/ORP (analog sensor), ■ Cable and Terminal
SC and DO) Cable size:
Note: When the FLXA202 is used in the multi-drop mode Outer diameter:
of HART communication, the output signal is 6 to 12 mm (suitable for M20 cable gland)
changed from 12.5 mA DC to 4 mA DC just after the Terminal screw size: M4
power is turned on. Enough power supply for the torque of screw up: 1.2 N•m
instruments is to be provided. Wire terminal:
Pin terminal, ring terminal and spade
2-sensor measurement terminal can be used for analyzer’s power
1295
supply terminals and sensor terminals.
Load resistance (Ω)

V - 11.5
R=
0.022 Grounding terminal:
1000 Ring terminal should be used.
Pin terminal: pin diameter: max. 1.9 mm
Ring and spade terminal: width: max. 7.8 mm
600
■ Cable Entry
Digital Communication
Range (HART) 3 holes,
250 M20 cable gland x 3 pcs
Close up plug x 1 pc
0 1617 18 22.8 24.7 40 Note: Cable gland and plug are delivered with an analyzer,
Voltage (V) but not assembled into the analyzer.
Figure 1 Supply Voltage and Load Resistance ■ Mounting
for pH/ORP (analog sensor), SC and DO Mounting hardware (option):
• Universal mounting kit (Note)
• Pipe and wall mounting hardware
1295
• Panel mounting hardware
Load resistance (Ω)

V - 11.5
R= Note: This kit contains the pipe and wall mounting
0.022
1000 hardware and the panel mounting hardware.
Except SENCOM
Hood (option):
• Stainless steel
600 • Stainless steel with urethane coating
516
Digital Communication
• Stainless steel with epoxy coating
304 Range (HART) ■ Stainless Steel Tag Plate
250
When the additional code “/SCT” with a tag number
is specified, the tag plate on which the tag number is
0 17 18 22.86 24.7 40 inscribed is delivered with the analyzer.
18.2 21 Voltage (V) Tag plate is hanging type.
Figure 2 Supply Voltage and Load Resistance
for ISC and pH/ORP SENCOM sensor

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 5
■ Conduit Adapter 5. Digital Communication
Using optional adapter
■ Kind of Digital Communication
• G1/2 (quantity: 3)
• HART (HART 5) or PH201G dedicated distributor
• 1/2NPT (quantity: 3) Note: Only one kind of digital communication is available
• M20 x 1.5 (quantity: 3) for one analyzer.
These conduit adapters are delivered with an
analyzer, but not assembled into the analyzer. ■ Output Value Parameter (HART)
Four value parameters (measured values) are
■ Size of Housing Case available for one digital communication.
165 x 165 x 155 mm (W x H x D) (without cable gland) • For 1-sensor measurement, these parameters are
■ Weight measured values.
Approx. 2.5 kg • For 2-sensor measurement, refer to the next item.
■ Ambient Operating Temperature ■ Digital Communication of 2-Sensor
-20 to +55 ºC Measurement (HART)
■ Storage Temperature Even when two sensor modules are installed, only
-30 to +70 ºC one digital communication is available for 2-sensor
measurement.
■ Humidity Four value parameters can be selected from the
10 to 90% RH at 40ºC (Non-condensing) followings;
■ Document Measured values of two sensors
Following documents are delivered with an analyzer; Calculated data of 2-sensor measurement
Paper copy: Redundant system output
Start-up Manual ■ Specific Contact Output with dedicated
written in English distributor, model PH201G (Style B)
Safety Precautions The distributor, model PH201G, is designed to
written in English connect with the 2-Wire Analyzer.
CD-ROM: This distributor supplies drive power to the analyzer
Start-up Manual and receives simultaneously 4-20 mA DC signal from
written in English the analyzer.
User's Manual This signal is converted to 1-5 V DC signal in the
written in English distributor.
Safety Regulations Manual This distributor also receives digital signals
for European region superimposed on the 4-20 mA DC signal, and
written in 25 languages provides contact outputs
General Specifications Input/Output signal:
written in English Number of available drive/signal point: 1
Technical Information Output signal: 1-5 V DC (2 points) (Note)
for HART Communication Load resistance: 2 kΩ or less (1-5 V DC output)
written in English Isolation system: Loop isolation type
User Setting Table Note: Two output signals for one analyzer’s analog output
of 5 kinds of measurement/sensor type are provided. Two 1-5 V DC output signals are same.
written in English Contact output:
Contact rating:
250 V AC, maximum 100 VA
220 V DC, maximum 50 VA
Hold contact output:
NC contact, normally energized
Contact closes when power is off or
during Hold situation.
Fail contact output:
NC contact, normally energized
Contact closes when power is off or
during Fail/Warning conditions.
Wash contact output:
NO contact
Contact closes during wash cycles.

All Rights Reserved. Copyright © 2015, Yokogawa Electric Corporation GS 12A01A03-01EN Mar. 23, 2018-00
 6
n Regulatory Compliance (FLXA202) ■ Explosion Protected Type Compliance
■ Safety, EMC and RoHS Compliance ‘Type’
Item Description in MS
Safety: UL 61010-1 code
UL 61010-2-030 Europe [Intrinsic safety “ia”] -CB
CAN/CSA-C22.2 No.61010-1 (ATEX) Applicable Standard:
CAN/CSA-C22.2 No.61010-2-030 EN 60079-0: 2012 + A11: 2013,
EN 61010-1 EN 60079-11: 2012
Certificate No:
EN 61010-2-030
DEKRA 11ATEX0109X
EMC: EN 61326-1 Class A,Table 2 (For use in Marking/Rating:
industrial locations) II 1 G Ex ia IIC T4 Ga
EN 61326-2-3 Ambient Temperature: -20 to 55°C
RCM: EN 61326-1 Class A,Table 2 Control Drawing: Refer to (1)
Korea Electromagnetic Conformity International [Intrinsic safety “ia”]
(IECEx) Applicable Standard:
Standard Class A 한국 전자파적합성 기준 IEC 60079-0: 2011, IEC 60079-
Russian: TR CU 020/2011 11: 2011
RoHS: EN 50581: 2012 (Style 1.02 or newer) Certificate No: IECEx DEK 11.0044X
Installation altitude: 2000 m or less Marking/Rating: Ex ia IIC T4 Ga
Category based on IEC 61010: I (Note 1) Ambient Temperature: -20 to 55°C
Pollution degree based on IEC 61010: 2 (Note 2) Control Drawing: Refer to (1)
Note 1: Installation category, called over-voltage category, United [Intrinsically safe / Nonincendive] -CD
specifies impulse withstand voltage. States (FM) Applicable Standard:
Equipment with “Category I” (ex. two wire Class 3600: 2011, Class 3610:
transmitter) is used for connection to circuits in 2010, Class 3611: 2004, Class
which measures are taken to limit transient over- 3810:2005, NEMA 250: 2014,
voltages to an appropriately low level. ANSI/ISA 60079-0: 2013, ANSI/
Note 2: Pollution degree indicates the degree of existence ISA 60079-11: 2014
of solid, liquid, gas or other inclusions which may Certificate No: 3039632
reduce dielectric strength. Degree 2 is the normal Marking/Rating:
indoor environment. IS CL I, DIV 1, GP ABCD CL I, ZN
Information of the WEEE Directive 0, AEx ia IIC
This product is purposely designed to be NI CL I, DIV 2, GP ABCD CL I,
ZN 2 IIC
used in a large scale fixed installations only
T4: for ambient temperature:
and, therefore, is out of scope of the WEEE -20 to 55°C
Directive. The WEEE Directive does not apply. Enclosure: Type 4X
The WEEE Directive is only valid in the EU. Control Drawing: Refer to (3)
Canada [Intrinsically safe / Nonincendive]
(CSA) Applicable Standard:
C22.2 No.0-10 (R2015), CAN/
CSA-C22.2 No.94-M91 (R2011),
C22.2 No.213-M1987 (R2013),
CAN/CSA-C22.2 No.60079-0:11,
CAN/CSA-C22.2 No.60079-
11:14, CAN/CSA-C22.2
No.61010-1-12, CAN/CSA-C22.2
No.61010-2-030-12
Certificate No: 2425510
Marking/Rating: Ex ia IIC T4 Ga
Intrinsicaly safe for Class I,
Division 1, Groups A, B, C, D, T4
Nonincendive for Class I, Division
2, Groups A, B, C, D, T4
Ambient Temperature: -20 to 55°C
Ambient Humidity:
0 – 100% (No Condensation)
Enclosure: IP66, NEMA 4X
Control Drawing: Refer to (2)

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 7
‘Type’ ‘Type’
Item Description in MS Item Description in MS
code code
United [Nonincendive] -DD Europe [Type of protection ‘n’] -DB
States (FM) Applicable Standard: (ATEX) Certificate:
Class 3600: 2011, Class 3611: Not Applicable as per Annex VIII
2004, Class 3810: 2005, NEMA to ATEX 2014/34/EU
250: 2014 Applicable Standard:
Certificate No: 3039632 EN 60079-0: 2012 + A11:2013,
Marking/Rating: EN 60079-11: 2012, EN
NI CL I, DIV 2, GP ABCD ZN 2 IIC 60079-15: 2010, EN 60529:
T4: for ambient temperature: 1991+A2:2013
-20 to 55°C Marking/Rating:
Enclosure: Type 4X II 3 G Ex nA ic IIC T4 Gc
Control Drawing: Refer to (3) Ambient Temperature: -20 to 55°C
Canada Applicable Standard: Enclosure: IP66
(CSA) C22.2 No.0-10 (R2015), CAN/ Control Drawing: Refer to (4)
CSA-C22.2 No.94-M91 (R2011), International [Type of protection ‘n’]
C22.2 No.213-M1987 (R2013), (IECEx) Applicable Standard:
CAN/CSA-C22.2 No.61010-1-12, IEC 60079-0: 2011, IEC 60079-
CAN/CSA-C22.2 No.61010-2- 11:2011, IEC 60079-15: 2010
030-12 Certificate No: IECEx DEK 16.0034X
Certificate No: 2425510 Marking/Rating: Ex nA ic IIC T4 Gc
Marking/Rating: Ambient Temperature: -20 to 55°C
Nonincendive for Class I, Division Enclosure: IP66
2, Groups A, B, C, D, T4 Control Drawing: Refer to (5)
Ambient Temperature: -20 to 55°C China [Intrinsic safety “ia”] -CH
Ambient Humidity: (NEPSI) Applicable Standard:
0 – 100% (No Condensation) GB3836.1-2010, GB3836.4-2010,
Enclosure: IP66, NEMA 4X GB 3836.20-2010
Control Drawing: Refer to (2) Certificate No: GYJ18.1051X
Canada [Type of protection ‘n’ / Nonincendive] -DE Marking/Rating: Ex ia IIC T4 Ga
(CSA) Applicable Standard: Ambient Temperature: -20 to 55°C
C22.2 No.0-10 (R2015), CAN/ Control Drawing: Refer to (6)
CSA-C22.2 No.94-M91 (R2011), Korea [Intrinsic safety “ia”] -CG
C22.2 No.213-M1987 (R2013), (KOSHA) Applicable Standard:
CAN/CSA-C22.2 No.60079-0:11, Notice of Ministry of Labor No.
CAN/CSA-C22.2 No.60079- 2016-54
11:14, CAN/CSA-C22.2 Certificate No: 15-AV4BO-0160X
No.60079-15:12, CAN/ Marking/Rating: Ex ia IIC T4 Ga
CSA-C22.2 No.61010-1-12, CAN/ Ambient Temperature: -20 to 55°C
CSA-C22.2 No.61010-2-030-12 Control Drawing: Refer to (6)
Certificate No: 2425510
Marking/Rating: Ex nA ic IIC T4 Gc
Nonincendive for Class I, Division
2, Groups A, B, C, D, T4
Ambient Temperature: -20 to 55°C
Ambient Humidity:
0 – 100% (No Condensation)
Enclosure: IP66, NEMA 4X
Control Drawing: Refer to (2)

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8

GS 12A01A03-01EN Mar. 23, 2018-00

Model: FLXA21 /FLXA202 Date: February 19, 2010
Model: FLXA21 /FLXA202 Date: Mar 24, 2013
11 Drawings
11.1 Control Drawing (for 4–20mA Type) Specific Conditions of Use
- When the enclosure of the Analyzer is made of aluminum alloy (FLXA202), and when the
Analyzer used in an explosive atmosphere requiring equipment of Category 1 G or EPL Ga, it
Hazardous Area Non-hazardous Area
must be installed in such a way that, even in the event of rare incidents, an ignition source due
to impact friction sparks is excluded.
FLXA21/FLXA202 Analyzer
Housing Assembly - When accessing the display window or other non-metallic parts of the enclosure of
Supply + +
FLXA202/FLXA21, take following measures to minimize the risk of explosion from electrostatic
Sensor 1 Measuring Module 1 Associated Apparatus discharge.
Supply – – Also, avoid any actions that cause the generation of electrostatic charge, such as rubbing with a
dry cloth.
Sensor 2 Measuring Module 2
To avoid electrostatic charge on the operator,
Supply +, Supply –
- Earth the operator through a wrist-strap, or
Ui: 30 V
Ii: 100 mA - Operate FLXA202/FLXA21 on the conductive floors, wearing anti-static work
Pi: 0.75 W clothes and electrostatic safety shoes, or
Ci: 13 nF
Li: 0 mH - Neutralize the operator and FLXA202/FLXA21 by a static elimination bar which
has a metal part earthed through resistor from 100kΩ to 100MΩ.
Measuring Module 1, 2
Type of Measuring Module
pH, SC, DO ISC SENCOM In case that those measures cannot be taken or static electricity cannot be suppressed, bring a
Uo 11.76 V 11.76 V 5.36 V

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gas detector and make sure there is no ignition capable atmosphere around FLXA202/FLXA21
Io 116.5 mA 60.6 mA 106.16 mA
Po 0.3424 W 0.178 W 0.1423 W before the operation.
Co 100 nF 100 nF 31 μF
ATEX and IECEx Intrinsic safety “ia”

Lo 1.7 mH 8 mH 0.45 mH
Notes:
1. The associated apparatus must be a linear source.
2. Measuring Module 2 is not necessarily installed. As for ISC module and SENCOM module, only
one module is permitted to be installed at a time.
3. Sensor 1 and Sensor 2 may be simple apparatus or intrinsically safe apparatus.
4. WARNING – POTENTIAL ELECTROSTATIC CHARGING HAZARD – SEE USER’S
MANUAL
■ Control Drawings
Rev.2: July. 25, 2016 Doc. No.: IKE039-A12 P.1-1
Rev.4: July. 25, 2016 Doc. No.: IKE039-A12 P.1
Yokogawa Electric Corporation

(1)
Yokogawa Electric Corporation
9

GS 12A01A03-01EN Mar. 23, 2018-00

Model: FLXA21 / FLXA202 Date: May 29, 2017 Model: FLXA21 / FLXA202 Date: May 29, 2017
Control drawing (4-20mA type)
Installation for Zone 0, 1 / Division 1 Installation for Zone 2 / Division 2
Applicable models: FLXA21-D-x-x-CD-xx-xx-A-..., FLXA202-D-x-x-CD-xx-xx-A-… Applicable models: FLXA21-D-x-x-CD-xx-xx-A-..., FLXA21-D-x-x-DD-xx-xx-A-...;
FLXA202-D-x-x-CD-xx-xx-A-…, FLXA202-D-x-x-DD-xx-xx-A-…
FLXA202-D-x-x-DE-xx-xx-A-...
Hazardous Area Non-hazardous Area
Class I, Zone 0, 1, Group IIC, or Hazardous Area Non-hazardous Area
Class I, Division 1, Groups A, B, C, D
Class I, Zone 2, Group IIC, or
Temperature Class: T4 Class I, Division 2, Groups A, B, C, D
FLEXA Series Analyzer Temperature Class: T4
Housing Assembly FLEXA Series Analyzer
Supply + + Housing Assembly
Intrinsic safety, Nonincendive, Type of protection ‘n’

Associated Apparatus
Sensor 1 Measuring Module 1 Supply + +
(Note 2)
(Note 6) Control Equipment
Supply – – Sensor 1 Measuring Module 1 (Note 7, 8)
(Note 6)
Supply – –
Sensor 2 Measuring Module 2 (Note 5)
(Note 6) Sensor 2
(Note 6) Measuring Module 2 (Note 5)
Supply +, Supply – (Note 2):
Ui: 30 V
Ii: 100 mA Supply +, Supply – (Note 7):
Pi: 0.75 W Ui: 30 V
Ci: 13 nF Ci: 13 nF
Li: 0 mH Li: 0 mH

All Rights Reserved. Copyright © 2015, Yokogawa Electric Corporation

Measuring Module 1, 2 (Note 6): Measuring Module 1, 2 (Note 6):
Type of Measuring Module Type of Measuring Module
pH, SC, DO ISC SENCOM pH, SC, DO ISC SENCOM
Uo 11.76 V 11.76 V 5.36 V Uo 11.76 V 11.76 V 5.36 V
Io 116.5 mA 60.6 mA 106.16 mA Io 116.5 mA 60.6 mA 106.16 mA
Po 0.3424 W 0.178 W 0.1423 W Po 0.3424 W 0.178 W 0.1423 W
Co 100 nF 100 nF 31 μF Co 100 nF 100 nF 31 μF
Lo 1.7 mH 8 mH 0.45 mH Lo 1.7 mH 8 mH 0.45 mH
Specific conditions of use Specific condition of use
- Electrostatic charges on the non-metallic or coated parts of the two wire analyzer shall be - Electrostatic charges on the non-metallic or coated parts of the two wire analyzer shall be
avoided. avoided.
- In the case where the enclosure of the analyzer is made of Aluminum, if it is mounted in Zone
0, it must be installed such, that even in the event of rare incidents, ignition sources due to Specific conditions of use for FLXA202-D-x-x-DE-xx-xx-A-... when it is used as “Ex nA ic”
impact and friction sparks are excluded. - The cable glands accompanying the equipment may not provide sufficient clamping. Additional
clamping of the cable shall be provided to ensure that pulling and twisting are not transmitted
to the termination. Alternatively, Ex d, Ex e, or Ex n cable glands which provide sufficient
clamping shall be used instead of the accompanying cable gland.
- The gaskets of the cable glands shall be protected from light.
- Analyzer must be installed in such a way that the air vent is physically protected from any
possible impact.
(2) CSA
Rev. Doc. No.: ICS032-A71 P.1 Rev. Doc. No.: ICS032-A71 P.2
Yokogawa Electric Corporation Yokogawa Electric Corporation
10

GS 12A01A03-01EN Mar. 23, 2018-00

Model: FLXA21 / FLXA202 Date: May 29, 2017 Model: FLXA21 / FLXA202 Date: May 29, 2017
Notes:
1. Installation must be in accordance with the Canadian Electric Code Part I (C22.1), 10. WARNING – POTENTIAL ELECTROSTATIC CHARGING HAZARD
ANSI/ISA-RP12.06.01 and relevant local codes. AVERTISSEMENT – DANGER POTENTIEL DE CHARGES ÉLECTROSTATIQUES
2. The associated apparatus must be a linear source meeting the following conditions. 11. WARNING – SUBSTITUTION OF COMPONENTS MAY IMPAIR INTRINSIC SAFETY
AVERTISSEMENT – LA SUBSTITUTION DE COMPOSANTS PEUT COMPROMETTRE LA
Uo (or Voc) ≤ Ui SÉCURITÉ INTRINSÉQUE.
Io (or Isc) ≤ Ii 12. WARNING – SUBSTITUTION OF COMPONENTS MAY IMPAIR SUITABILITY FOR
Po ≤ Pi ZONE 2 / DIVISION 2
Co (or Ca) ≥ Ci + Ccable AVERTISSEMENT –LA SUBSTITUTION DE COMPOSANTS PEUT RENDRE CE MATÉRIEL
Lo (or La) ≥ Li + Lcable INACCEPTABLE POUR LES EMPLACEMENTS DE ZONE 2 / DIVISION 2
3. Control equipment connected to the associated apparatus must not use or generate a
voltage which exceeds Um of the associated apparatus.
4. The control drawing of the associated apparatus must be followed when installing the
equipment.
5. Measuring Module 2 is not always installed. As for ISC module and SENCOM module,
only one module is permitted to be installed at a time.
6. When installed in Zone 0 or 1, or Division 1, Sensor 1 and Sensor 2 may be simple
apparatus or intrinsically safe apparatus meeting the conditions below.
When installed in Zone 2 or Division 2, Sensor 1 and Sensor 2 may be simple apparatus or
non-incendive field wiring apparatus meeting the conditions below, or alternatively, they may be
equipment suitable for Zone 2 or Division 2 respectively, if a suitable wiring method other than
non-incendive field wiring is employed.
Ui (or Vmax) ≥ Uo
Ii (or Imax) ≥ Io
Pi ≥ Po
Ci ≤ Co – Ccable
Li ≤ Lo – Lcable
7. The control equipment must be an associated non-incendive field wiring apparatus

All Rights Reserved. Copyright © 2015, Yokogawa Electric Corporation

meeting the conditions below. Alternatively, it may be general-purpose equipment, if
a suitable wiring method other than non-incendive field wiring is employed.
Uo (or Voc) ≤ Ui
Co (or Ca) ≥ Ci + Ccable
Lo (or La) ≥ Li + Lcable
8. When FLXA202-D-x-x-DE-xx-xx-A-... is used as “Ex nA ic”, it must be installed in
accordance with one of the following:
a) in a SELV or PELV system, or
b) via a safety isolating transformer complying with the requirements of
IEC 61558-2-6, or a technically equivalent standard, or
c) directly connected to apparatus complying with IEC60950 series, IEC61010-1,
or a technically equivalent standard, or
d) fed directly from cells or batteries.
9. When FLXA202-D-x-x-DE-xx-xx-A-... is used as “Ex nA ic” and with the accompanying
cable glands, cable with an external diameter of 6 to 12 mm must be used for field
wiring. The cable glands must be secured with a tightening torque of 6 Nm so that
they can be released only with the aid of a tool. Unused cable gland shall be sealed
with the accompanying metal plug.
Rev. Doc. No.: ICS032-A71 P.3 Rev. Doc. No.: ICS032-A71 P.4
Yokogawa Electric Corporation Yokogawa Electric Corporation
11

GS 12A01A03-01EN Jan. 11, 2019-02

Model: FLEXA Series Date: April 17, 2015 Model: FLEXA Series Date: April 17, 2015
Control drawing (4–20 mA type)
Installation for Division 1 / Zone 0, 1 Installation for Division 2 / Zone 2
Applicable models: FLXA21-D-x-x-CD-xx-xx-A-..., FLXA202-D-x-x-CD-xx-xx-A-… Applicable models: FLXA21-D-x-x-CD-xx-xx-A-..., FLXA21-D-x-x-DD-xx-xx-A-...;
FLXA202-D-x-x-CD-xx-xx-A-…, FLXA202-D-x-x-DD-xx-xx-A-…
Hazardous (Classified) Location Unclassified Location Hazardous (Classified) Location Unclassified Location
Class I, Division 1, Groups A, B, C, D, or Class I, Division 2, Groups A, B, C, D, or
Class I, Zone 0, 1, Group IIC Class I, Zone 2, Group IIC,
Temperature Class: T4 Temperature Class: T4
FLEXA Series Analyzer FLEXA Series Analyzer
Housing Assembly Housing Assembly
Supply + + Supply + +
Associated Apparatus Control Equipment
Sensor 1 Measuring Module 1 Sensor 1 Measuring Module 1 (Note 9)
(Note 4)
(Note 8) (Note 8) Supply – –
Supply – –
Sensor 2 Measuring Module 2 (Note 7) Sensor 2 Measuring Module 2 (Note 7)
(Note 8) (Note 8)
Supply +, Supply – (Note 4): Supply +, Supply – (Note 9):
Ui: 30 V Ui: 30 V
Ii: 100 mA Ci: 13 nF
Pi: 0.75 W Li: 0 mH
Ci: 13 nF

All Rights Reserved. Copyright © 2015, Yokogawa Electric Corporation

Intrinsic safety, Nonincendive

Li: 0 mH Measuring Module 1, 2 (Note 8):

Measuring Module 1, 2 (Note 8): Type of Measuring Module
Type of Measuring Module pH, SC, DO ISC SENCOM
pH, SC, DO ISC SENCOM Uo 11.76 V 11.76 V 5.36 V
Uo 11.76 V 11.76 V 5.36 V Io 116.5 mA 60.6 mA 106.16 mA
Io 116.5 mA 60.6 mA 106.16 mA Po 0.3424 W 0.178 W 0.1423 W
Po 0.3424 W 0.178 W 0.1423 W Co 4 μF 4 μF 31 μF
Co 100 nF 100 nF 31 μF Lo 4.5 mH 19 mH 0.45 mH
Lo 1.7 mH 8 mH 0.45 mH
Specific conditions of use: Specific condition of use:
- Electrostatic charges on the non-metallic or coated parts of the two wire analyzer shall be - Electrostatic charges on the non-metallic or coated parts of the two wire analyzer shall be
avoided. avoided.
- In the case where the enclosure of the analyzer is made of Aluminum, if it is mounted in
ZONE 0, it must be installed such that, even in the event of rare incidents, ignition sources
due to impact and friction sparks are excluded.
(3) FM
Rev.1: May 29, 2017 Doc. No.: IFM039-A71 P.1 Rev.2: Sep. 15, 2017 Doc. No.: IFM039-A71 P.2
Yokogawa Electric Corporation Yokogawa Electric Corporation
12

GS 12A01A03-01EN Mar. 23, 2018-00

Model: FLEXA Series Date: May 29, 2017
Notes:
1. This drawing replaces the former control drawing IKE039-A12.
2. No revision to this drawing without prior approval of FM.
3. Installation must be in accordance with the National Electric Code (NFPA 70),
ANSI/ISA-RP12.06.01 and relevant local codes.
4. The associated apparatus must be an FM-approved linear source meeting the following
conditions.
Uo (or Voc) ≤ Ui
Io (or Isc) ≤ Ii
Po ≤ Pi
Co (or Ca) ≥ Ci + Ccable
Lo (or La) ≥ Li + Lcable
5. Control equipment connected to the associated apparatus must not use or generate a voltage
which exceeds Um of the associated apparatus.
6. The control drawing of the associated apparatus must be followed when installing the
equipment.
7. Measuring Module 2 is not always installed. As for ISC module and SENCOM module, only one
module is permitted to be installed at a time.
8. When installed in Division 1, Zone 0 or Zone 1, Sensor 1 and Sensor 2 may be simple apparatus
or intrinsically safe apparatus meeting the conditions below.
When installed in Division 2 or Zone 2, Sensor 1 and Sensor 2 may be simple apparatus or
nonincendive field wiring apparatus meeting the conditions below, or alternatively, they may be
equipment suitable for Division 2 or Zone 2 respectively, if a suitable wiring method other than
nonincendive field wiring is employed.
Ui (or Vmax) ≥ Uo
Ii (or Imax) ≥ Io
Pi ≥ Po
Ci ≤ Co – Ccable

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Li ≤ Lo – Lcable
9. The control equipment must be an FM-approved associated nonincendive field wiring apparatus
meeting the conditions below. Alternatively, it may be general-purpose equipment, if a suitable
wiring method other than nonincendive filed wiring is employed.
Uo (or Voc) ≤ Ui
Co (or Ca) ≥ Ci + Ccable
Lo (or La) ≥ Li + Lcable
10. WARNING – POTENTIAL ELECTROSTATIC CHARGING HAZARD – WHEN THE
EQUIPMENT IS USED IN HAZARDOUS LOCATIONS, AVOID ANY ACTION WHICH
GENERATE ELECTROSTATIC DISCHARGE SUCH AS RUBBING WITH A DRY CLOTH.
11. WARNING – IN THE CASE WHERE THE ENCLOSURE OF THE ANALYZER IS MADE OF
ALUMINUM, IF IT IS MOUNTED IN ZONE 0, IT MUST BE INSTALLED SUCH THAT, EVEN
IN THE EVENT OF RARE INCIDENTS, IGNITION SOURCES DUE TO IMPACT AND
FRICTION SPARKS ARE EXCLUDED
12. WARNING – SUBSTITUTION OF COMPONENTS MAY IMPAIR INTRINSIC SAFETY AND
SUITABITLITY FOR DIVISION 2 / ZONE 2.
Rev. Doc. No.: IFM039-A71 P.3
Yokogawa Electric Corporation
 Model: FLXA202 Date: December 25, 2015 Model: FLXA202 Date: December 25, 2015
13

GS 12A01A03-01EN Mar. 23, 2018-00

Control Drawing
Notes:
1. Installation must be in accordance with EN60079-14 and relevant local codes.
Hazardous Area Non Hazardous Area
2. Measuring Module 2 is not always installed. As for ISC module and SENCOM module,
only one module is permitted to be installed at a time.
FLXA202 Analyzer 3. When installed in an area where the use of Category 3 G equipment is required,
Sensor 1 and Sensor 2 may be simple apparatus, intrinsically safe apparatus meeting
Housing Assembly Power Supply / conditions below, or other Category 3 G equipment.
Supply + + Control Equipment
(Note 4) Ui (or Vmax) ≥ Uo
Sensor 1 Measuring Module 1 Ii (or Imax) ≥ Io
Supply – – Pi ≥ Po
Ci ≤ Co – Ccable
Li ≤ Lo – Lcable
Sensor 2 Measuring Module 2
4. FLXA202 Analyzer must be installed in accordance with one of the following:
a) in a SELV or PELV system, or
Ex nA ic Ratings b) via a safety isolating transformer complying with the requirements of IEC
Supply +, Supply – 61558-2-6, or a technically equivalent standard, or
Um: 29.6V c) directly connected to apparatus complying with IEC60950 series, IEC61010-1, or a
Un:16V to 29.6V (pH/ORP,SC,DO one module) technically equivalent standard, or
17V to 29.6V (ISC one module) d) fed directly from cells or batteries.
21V to 29.6V (SENCOM one module)
22.8V to 29.6V (pH/ORP,SC, DO two modules) 5. When FLXA202 Analyzer is installed with accompanying cable glands, cable with an
external diameter of 6 mm to 12 mm must be used for field wiring. The cable glands
must be secured with a tightening torque of 6 Nm so that they can be released only
Measuring Module 1, 2 with the aid of a tool. Unused cable gland shall be sealed with the accompanying metal
Type of Measuring Module plug.
pH, SC, DO ISC SENCOM
6. The gaskets of the cable glands shall be protected from light.

All Rights Reserved. Copyright © 2015, Yokogawa Electric Corporation

Uo 11.76 V 11.76 V 5.36 V
Io 116.5 mA 60.6 mA 106.16 mA
Type of protection ‘n’

Po 0.3424 W 0.178 W 0.1423 W

Co 100 nF 100 nF 31 μF
Lo 1.7 mH 8 mH 0.45 mH
Specific condition of use
- Electrostatic charges on the non-metallic or coated parts of the two wire analyzer
shall be avoided.
- The cable gland accompanying the equipment may not provide sufficient clamping.
Additional clamping of the cable shall be provided to ensure that pulling and
twisting are not transmitted to the termination. Alternatively, an Ex d, Ex e, or Ex n
cable gland which provides sufficient clamping shall be used instead of the
accompanying cable gland.
- Analyzer must be installed in such a way that the air vent is physically protected
from any possible impact.
(4) ATEX (Type n) Rev. 1: July 24, 2017 Doc.No.: NKE053-A71 P.1 Rev. 1: July 24, 2017 Doc.No.: NKE053-A71 P.2
Yokogawa Electric Corporation Yokogawa Electric Corporation
 Model: FLXA202 Date: March 31, 2016 Model: FLXA202 Date: March 31, 2016

GS 12A01A03-01EN Mar. 23, 2018-00

14

Control Drawing Notes:

1. Installation must be in accordance with IEC60079-14 and relevant local codes.
Hazardous Area Non Hazardous Area 2. Measuring Module 2 is not always installed. As for ISC module and SENCOM module,
only one module is permitted to be installed at a time.
3. When installed in an area where EPL Gc is required, Sensor 1 and Sensor 2 may be
simple apparatus, intrinsically safe apparatus meeting conditions below, or other
FLXA202 Analyzer
EPL Gc equipment.
Housing Assembly Power Supply /
Supply + + Control Equipment Ui (or Vmax) ≥ Uo
(Note 4) Ii (or Imax) ≥ Io
Sensor 1 Measuring Module 1 Pi ≥ Po
– Ci ≤ Co – Ccable
Supply –
Li ≤ Lo – Lcable
Sensor 2 Measuring Module 2 4. FLXA202 Analyzer must be installed in accordance with one of the following:
a) in a SELV or PELV system, or
b) via a safety isolating transformer complying with the requirements of IEC
Ex nA ic Ratings 61558-2-6, or a technically equivalent standard, or
Supply +, Supply – c) directly connected to apparatus complying with IEC60950 series, IEC61010-1, or a
Um: 29.6V technically equivalent standard, or
Un:16V to 29.6V (pH/ORP,SC,DO one module) d) fed directly from cells or batteries.
17V to 29.6V (ISC one module)
21V to 29.6V (SENCOM one module) 5. When FLXA202 Analyzer is installed with accompanying cable glands, cable with an
22.8V to 29.6V (pH/ORP,SC, DO two modules) external diameter of 6 mm to 12 mm must be used for field wiring. The cable glands
must be secured with a tightening torque of 6 Nm so that they can be released only
with the aid of a tool. Unused cable gland shall be sealed with the accompanying metal
plug.

Intrinsic safety “ia”

Measuring Module 1, 2
Type of Measuring Module

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pH, SC, DO ISC SENCOM
Uo 11.76 V 11.76 V 5.36 V
Type of protection ‘n’

Io 116.5 mA 60.6 mA 106.16 mA

Po 0.3424 W 0.178 W 0.1423 W

(Refer to (1) ATEX and IECEx Control Drawing)

Co 100 nF 100 nF 31 μF
Lo 1.7 mH 8 mH 0.45 mH
Specific condition of use
- Electrostatic charges on the non-metallic or coated parts of the two wire
analyzer shall be avoided.
- The cable gland accompanying the equipment may not provide sufficient
clamping. Additional clamping of the cable shall be provided to ensure that
pulling and twisting are not transmitted to the termination. Alternatively, an Ex
d, Ex e, or Ex n cable gland which provides sufficient clamping shall be used

(6) NEPSI and KOSHA

instead of the accompanying cable gland.
- The gaskets of the cable glands shall be protected from light.
- Analyzer must be installed in such a way that the air vent is physically protected
(5) IECEx (Type n)

from any possible impact.

Rev. Doc.No.: NIE015-A71 P.1 Rev. Doc.No.: NIE015-A71 P.2
Yokogawa Electric Corporation Yokogawa Electric Corporation
 15
n Model & Suffix Codes
Model Suffix code Option code Description
FLXA202 ········································································ ················· 2-Wire Analyzer
Power supply -D ················· Always -D
Housing -B ················· Aluminum alloy cast + urethane coating
(Note 12) -C ················· Aluminum alloy cast + epoxy coating
-D ················· Aluminum alloy cast + high anti-corrosion coating
Display(Note 13) -D ················· Anti-glare LCD
Type(Note 1) -AB ················· General purpose for CE, RCM
-AD ················· General purpose for CSA
-AG ················· General purpose for KC
-AQ ················· General purpose for EAC with PA
-AR ················· General purpose for EAC
-CB ················· IS for ATEX, IECEx (Note 14)
-CD ················· IS for FM, CSA (Note 2)
-CF ················· IS for TIIS (Note 15)
-CG ················· IS for KOSHA (Note 3)
-CH ················· IS for NEPSI
-CQ ················· IS for EAC with PA
-CR ················· IS for EAC
-DB ················· Type n for ATEX, IECEx
-DD ················· NI for FM, CSA
-DE ················· Type n for CSA
1st input -P1 ················ pH/ORP (Note 4)
-C1 ················ Conductivity (SC)
-C5 Inductive conductivity (ISC)
-D1 ················ Dissolved oxygen (DO)
-S1 ················ pH/ORP (SENCOM sensor) (Note 5)
2nd input (Note 6) -NN ················ Without input
-P1 ················ pH/ORP (Note 4)
-C1 ················ Conductivity (SC)
-D1 ················ Dissolved oxygen (DO)
Output -A ················· 4-20 mA + HART
— -N ················· Always -N
Language set (Note 7) -LA ················ English and 11 languages
Country (Note 8) -N ················ Global except Japan
-J ················ Japan
— -NN ················· Always -NN
Option Mounting hardware /UM Universal mounting kit (Note 9)
/U Pipe and wall mounting hardware
/PM Panel mounting hardware
Hood /H6 Hood, stainless steel
/H7 Hood, stainless steel + urethane coating
/H8 Hood, stainless steel + epoxy coating
Tag plate /SCT Stainless steel tag plate
Conduit adapter(Note 10) /CB4 G1/2 x 3 pcs
/CD4 1/2NPT x 3 pcs
/CF4 M20 x 1.5 x 3 pcs
/CB5 G1/2 x 3 pcs for Type n
/CD5 1/2NPT x 3 pcs for Type n
/CF5 M20 x 1.5 x 3 pcs for Type n
Measurement law /K With Measurement Law certificate (Note 11)
Notes:
1: Type “-C * ” is intrinsic safety (IS), Type “-DB” is type n of ATEX and IECEx, Type “-DD” is nonincendive (NI) of FM and CSA
Type “-DE” is type n of CSA.
2: Type “-CD ” is intrinsic safety, but is available as nonincendive.
3: Korean IM is attached to FLXA202 instead of English IM.
4: This input is to be come from an analog pH/ORP sensor.
5: When the analyzer is connected with the digital sensor (FU20F pH/ORP SENCOM Sensor)

All Rights Reserved. Copyright © 2015, Yokogawa Electric Corporation GS 12A01A03-01EN Mar. 23, 2018-00
 16
6: When a 2nd input is selected, only the same kind of the 1st input is available.
For example, when a 1st input is “-P1”, the 2nd input must be the same “-P1”.
The combination of ISC and ISC is not available. And, the combination of SENCOM sensor and SENCOM sensor is not
available, either.
7: These languages are message languages on the analyzer’s display.
One analyzer has English and 11 languages.
All languages are as follows; English, Chinese, Czech, French, German, Italian, Japanese, Korean, Polish, Portuguese,
Russian and Spanish.
8: When an analyzer is used in Japan, it must meet the Japanese Measurement Law, please select the “-J”.
Only SI units must be used on the analyzer and its documents in Japan.
9: The universal mounting kit contains the pipe and wall mounting hardware (/U) and the panel mounting hardware (/PM).
10: “/CB5”, “/CD5”, “/CF5” are exclusively for type “-DB” or “-DE”. “/CB4”, “/CD4”, “/CF4” cannot be used with type “-DB” or “-DE”.
“/CB4”, “/CD4”, “/CF4” can be used with other types of the analyzer except for “-DB” or “-DE”.
11: The analyzer with Japanese Measurement Law certificate is available only for the following model;
FLXA202-D-[Housing code]-D-AB-P1-NN-A-N-LA-J-NN/[option code except /K]/K
Only one pH measurement with an analog sensor is certified. The digital sensor (FU20F) is not certified.
The output signal of 4 - 20 mA is certified. HART communication is not certified
12: Urethane coating is for acid resistance, and epoxy coating is for alkali resistance. For high anti-corrosion coating, both
urethane coating and epoxy coating are applied.
13: Type “-CF” is anti-reflection coated. Other types are anti-glare coated.
14: Product registration is done by Yokogawa Taiwan Corporation as an importer in Taiwan.
15: For detailed information refer to Japanese GS 12A01A03-01JA.

All Rights Reserved. Copyright © 2015, Yokogawa Electric Corporation GS 12A01A03-01EN Dec. 13, 2018-01
 17
n Dimensions and Mounting

146 9 Unit: mm
165 40 80
165

137

80
For sensor 1 cable 4-M6 depth 7
For sensor 2 cable

For power supply

137 FB4_01.ai

Conduit Adapter (Option code: /CB4, /CD4, /CF4)

Nut Unit: mm(inch)

Approx. Packing
55(2.2") 49
(1.93")
G1/2 screw (/CB4), 1/2 NPT screw (/CD4)
Adapter M20x1.5 screw (/CF4)
F0204.ai

Conduit Adapter (Option code: /CB5, /CD5, /CF5)

Nut Unit: mm(inch)

Approx. Packing
64(2.52")

G1/2 screw (/CB5), 1/2 NPT screw (/CD5)

M20x1.5 screw (/CF4)
Adapter Conduit_Adapter_02.ai

All Rights Reserved. Copyright © 2015, Yokogawa Electric Corporation GS 12A01A03-01EN Mar. 23, 2018-00
 18
(Note) The universal mounting kit (/UM) contains the pipe and wall mounting hardware (/U) and the panel mounting
hardware (/PM).

Panel mounting hardware (Option code: /PM, /UM)

Unit: mm
Panel thickness
1 to 12

121
2-M5 length 35 +1
138 0

+1
138 0
4-M6 *

195
100

185

Spacing panel cutout

*: Tighten the four screws to a torque of 2 N•m.

178 FB4-202_02.ai

Wall mounting hardware (Option code: /U, /UM)

Unit: mm
165 168 4-M6 *
13
165
234.5

200
50

For wall mounting

15

3-ø10 holes
70
100
*: Tighten the four screws to a torque of 2 N•m.
FB4-202_03.ai

Note: The wall on which the analyzer is mounted should be strong enough to bear the weight of more than 8 kg.

All Rights Reserved. Copyright © 2015, Yokogawa Electric Corporation GS 12A01A03-01EN Mar. 23, 2018-00
 19
Pipe mounting hardware (Option code: /U, /UM)
Unit: mm
165
(209)
155 Pipe 50A
(ø60.5)
4-M6 *

184.5

200
50

M8 U-bolt
Pipe mounting (Horizontal) Pipe mounting (Vertical)
100
*: Tighten the four screws to a torque of 2 N•m. FB4-202_04.ai

Stainless steel hood (Option code: /H6, /H7, /H8)

184 Unit: mm
165 220 9
57
72
199

165

(50)

(70)
(100)
FB4-202_05.ai

All Rights Reserved. Copyright © 2015, Yokogawa Electric Corporation GS 12A01A03-01EN Mar. 23, 2018-00
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n Wiring Diagrams
WTB10 or BA10 Case of Distributor
Terminal box *6 FLXA202 2-Wire Analyzer PH201G (Style B)
– CMN CMN
n n n n n n n n n *4 + B D H
A C F

(*3) Output 2 (1-5V DC)

n n n n n n n n n *5 *7
Output 1 (1-5V DC)

*1 L N
Sensor

+ a c e Power supply
*3 b d f
– 20 to 130V DC
or
80 to 138V AC, 47 to 63Hz

*2 HOLD WASH
WTB10 or BA10 FAIL
Terminal box *6 Case of Distributor
SDBT
– –
+ B + H
A F

Output 2 (1-5V DC)

*7
Output 1 (1-5V DC)
Sensor

L N
Power supply
+
1 – 20 to 130V DC
2 or
(*3) 80 to 138V AC, 47 to 63Hz
*1: Use a 2-wire shielded cable with an outside diameter of 6 to 12 mm.
*2: Connect the analyzer to ground. (Class D ground: 100 ohm or less)
*3: This line is connected to a distributor or 24V DC power supply.
*4: Terminal numbers for each sensor module are shown below.
*5: Two modules of the same kind of measurement/sensor type can be installed. When measuring inductive
conductivity or pH/ORP with the SENCOM sensor, only one module can be installed.
*6: The terminal box may be necessary depending on the sensor cable length and the distance between the
analyzer and the sensor.
The SENCOM sensor is to be connected directly to the analyzer without a terminal box.
*7: Two outputs, output 1 and output2, of PH201G or SDBT are same signals.

11 12 14 18 13 17 19 15 16
PH Module PH

11 12 13 14 15 16 NC
SC Module SC

11 12 13 17 14 16 15
ISC Module ISC

11 12 16 15 13 14 17 18 NC
DO Module DO

NC 82 83 84 NC 86 87
SENCOM Module SENCOM

All Rights Reserved. Copyright © 2015, Yokogawa Electric Corporation GS 12A01A03-01EN Mar. 23, 2018-00
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n Inquiry Specifications Sheet for FLXA202 2-Wire Analyzer
Make inquiries by placing checkmarks () in the pertinent boxes and filling in the blanks.

1. General Information
Company name
Contact Person; Department;
Plant name;
Measurement location;
Purpose of use;  Indication,  Recording,  Alarm,  Control

2. Measurement Conditions
(1) Process temperature; to Normally [°C]
(2) Process pressure; to Normally [kPa]
(3) Flow rate; to Normally [l/min]
(4) Flow speed; to Normally [m/s]
(5) Slurry or contaminants;  No,  Yes
(6) Name of process fluid;
(7) Components of process fluid;
(8) Others;

3. Installation Site
(1) Ambient temperature; to [°C]
(2) Location;  Outdoors,  Indoors
(3) Others;

4. Requirements
1st Input;  pH/ORP (analog sensor)  Conductivity (SC)  Inductive conductivity (ISC)
 Dissolved oxygen (DO)  pH/ORP (digital sensor, FU20F)
2nd Input;  With (same as 1st Input)  Without

4.1 pH/ORP (analog sensor)

 1st Input
(1) Measuring range;  pH 0 to 14  ORP to mV 
(2) Transmission output;  4 to 20 mA DC  pH  ORP  Temperature
(3) System configuration selection;  Electrode,  Holder,  pH Converter,  Cleaning system,  Terminal box,
 Accessories
(4) Electrode cable length;  3m,  5m,  7m,  10m,  15m,  20m,  m
(5) Electrode operating pressure; 10 kPa or less,  More than 10 kPa
(6) Type of holder;  Guide pipe,  Submersion,  Flow-through,  Suspension,  Angled floating ball,
 Vertical floating ball
(7) Cleaning method;  No cleaning,  Ultrasonic cleaning,  Jet cleaning,  Brush cleaning
(8) Sample temperature;  -5 to 105°C,  -5 to 100°C,  -5 to 80°C
(9) Others;
 2nd Input
(1) Measuring range;  pH 0 to 14  ORP to mV 
(2) Transmission output;  4 to 20 mA DC  pH  ORP  Temperature
(3) System configuration selection;  Electrode,  Holder,  pH Converter,  Cleaning system,  Terminal box,
 Accessories
(4) Electrode cable length;  3m,  5m,  7m,  10m,  15m,  20m,  m
(5) Electrode operating pressure; 10 kPa or less,  More than 10 kPa
(6) Type of holder;  Guide pipe,  Submersion,  Flow-through,  Suspension,  Angled floating ball,
 Vertical floating ball
(7) Cleaning method;  No cleaning,  Ultrasonic cleaning,  Jet cleaning,  Brush cleaning
(8) Sample temperature;  -5 to 105°C,  -5 to 100°C,  -5 to 80°C
(9) Others;

All Rights Reserved. Copyright © 2015, Yokogawa Electric Corporation GS 12A01A03-01EN Mar. 23, 2018-00
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4.2 Conductivity
 1st Input
(1) Measuring range;
(2) Transmission output; 4 to 20 mA DC
-1 -1
(3) Detector/sensor; SC4AJ  Two electrode system (0.02 cm )  Two electrode system (0.1 cm )
-1 -1
SC8SG  Two electrode system (0.01 cm )  Two electrode system (10 cm ),
-1
 Four electrode system (10 cm )
-1 -1
SC210G  Two electrode system (0.05 cm )  Two electrode system (5 cm )
(4) Detector/sensor mounting method;
SC4AJ  Adapter mounting,  Welding socket,  Welding clamp
SC8SG  Screw-in,  Flow-through
SC210G  Screw-in,  Flange,  Flow-through,  Screw-in with gate valve
(5) Electrode cable length; SC4AJ  3m,  5m,  10m,  20m
SC8SG  5.5m,  10m,  20m
SC210G  3m,  5m,  10m,  15m,  20m
(6) Others;

 2nd Input
(1) Measuring range;
(2) Transmission output; 4 to 20 mA DC
-1 -1
(3) Detector/sensor; SC4AJ  Two electrode system (0.02 cm )  Two electrode system (0.1 cm )
-1 -1
SC8SG  Two electrode system (0.01 cm )  Two electrode system (10 cm ),
-1
 Four electrode system (10 cm )
-1 -1
SC210G  Two electrode system (0.05 cm )  Two electrode system (5 cm )
(4) Detector/sensor mounting method;
SC4AJ  Adapter mounting,  Welding socket,  Welding clamp
SC8SG  Screw-in,  Flow-through
SC210G  Screw-in,  Flange,  Flow-through,  Screw-in with gate valve
(5) Electrode cable length; SC4AJ  3m,  5m,  10m,  20m
SC8SG  5.5m,  10m,  20m
SC210G  3m,  5m,  10m,  15m,  20m
(6) Others;

4.3 Inductive conductivity

(1) Measuring range;
(2) Transmission output; 4 to 20 mA DC
(3) System configuration selection;  ISC40GJ Sensor,  Holder,  Converter,  BA20 Terminal box,
 WF10J Extension cable
(4) Sensor mounting method;  ISC40FDJ Immersion holder,  ISC40FFJ Flow-through holder,
 ISC40FSJ Direct insertion adapter
(5) ISC40GJ Sensor cable length;  5m,  10m,  15m,  20m
(6) WF10J Extension cable length;  5m,  10m,  20m,  30m,  40m
(7) Others;

All Rights Reserved. Copyright © 2015, Yokogawa Electric Corporation GS 12A01A03-01EN Mar. 23, 2018-00
 23
4.4 Dissolved oxygen
 1st Input
(1) Measuring range;  0 to 50 mg/L 
(2) Transmission output; 4 to 20 mA DC
(3) System configuration selection;  Electrode,  Holder,  Converter,  Cleaning system,
 Terminal box,  Maintenance parts set,  Calibration set
(4) Electrode cable length;  3m,  5m,  10m,  15m,  20m
(5) Type of holder;  Guide pipe,  Submersion,  Flow-through,  Suspension,
 Angled floating ball,  Vertical floating ball
(6) Cleaning method;  No cleaning,  Jet cleaning
(7) Others;

 2nd Input
(1) Measuring range;  0 to 50 mg/L 
(2) Transmission output; 4 to 20 mA DC
(3) System configuration selection;  Electrode,  Holder,  Converter,  Cleaning system,
 Terminal box,  Maintenance parts set,  Calibration set
(4) Electrode cable length;  3m,  5m,  10m,  15m,  20m
(5) Type of holder;  Guide pipe,  Submersion,  Flow-through,  Suspension,
 Angled floating ball,  Vertical floating ball
(6) Cleaning method;  No cleaning,  Jet cleaning
(7) Others;

4.5 pH/ORP (digital sensor, FU20F)

(1) Measuring range;  pH 0 to 14  ORP to mV 
(2) Transmission output;  4 to 20 mA DC  pH  ORP  Temperature
(3) System configuration selection;  Electrode,  Holder,  pH Converter,  Cleaning system,  Accessories
(4) Electrode cable length;  3m,  5m,  10m,  20m,  m
(5) Electrode operating pressure; 10 kPa or less,  More than 10 kPa
(6) Type of holder;  Guide pipe,  Submersion,  Flow-through,  Suspension,  Angled floating ball,
 Vertical floating ball
(7) Cleaning method;  No cleaning,  Jet cleaning
(8) Sample temperature;  -5 to 105°C,  -5 to 100°C,  -5 to 80°C
(9) Others;

All Rights Reserved. Copyright © 2015, Yokogawa Electric Corporation GS 12A01A03-01EN Mar. 23, 2018-00
Subject to change without notice.