Troubleshooting Guide Industrial Pressure Transducers
Before servicing any installed pressure transducer, you must
● depressurize the system
User’s Manual
War n i n g
● purge the transducer
Residual material may be left in the transducer and system. S Model
■ If the transducer becomes damaged or unsafe for operation, remove it from service
War n i n g and mark to prevent it from being used accidentally. S Model Safety Instructions
■ Have repairs performed by the manufacturer only. The Swagelok®S model transducer is For proper and safe operation, Swagelok
ideal for general use in a wide variety War n in g
S model transducers must be installed,
Do not insert any pointed or hard objects into the pressure port for cleaning. of industrial applications such as operated, and serviced according to NEC,
machine control, process control, applicable local regulations, and these
laboratory and test equipment, instructions. Otherwise, serious personal
Problem Possible Causes Remedy hydraulics, and pneumatics. injuries, damage or both can occur.
Output signal unchanged
after change in pressure Mechanical overload through overpressure Replace transducer➀ Except for adjusting the length of the
wires, the electrical connection provided
Mechanical overload through overpressure Re-calibrate transducer War n in g
Signal span too small on the transducer must be used as
Diaphragm is damaged, e.g. through impact Replace transducer➀ originally supplied and not bypassed. Only
Signal span dropping off / Abrasive / aggressive media; corrosion of qualified persons should work on these
too small
diaphragm / pressure connector; transmission Replace transducer➀
fluid missing.
Introduction instruments.
Swagelok industrial pressure transducers allow for
Electromagnetic interference source in the Shield the transducer; shield the cables; remove electronic monitoring of system pressures in a Do not exceed the overpressure rating.
vicinity, e.g. inverter drive the interference source War n in g
Signal span erratic variety of industrial applications. The products
Ensure permissible temperatures (see Operating feature an accuracy of 0.5 % Limit point calibration
Working temperature too high / too low Instructions)
(0.25 % Best fit straight line), and temperature Before servicing any installed pressure
Ensure permissible temperatures (see Operating transducer you must
Signal span incorrect Working temperature too high / too low Instructions) compensation to ensure accuracy and long term
stability when exposed to temperature variations. The War n in g
● depressurize system
Control the internal temperature of the transducer ● purge the transducer
Medium or ambient temperature too high / within the permissible range; observe the allowable transducers are zero and span adjustable, and are
too low available in a wide variety of pressure and electrical
temperture error (see Operating Instructions)
Residual material may be left in the
Abnormal zero point signal Abnormal mounting position Correct the zero point through the potentiometer connections, pressure ratings, pressure units, and
transducer and system.
signal outputs to fulfill many application requirements.
Ensure permissible overload limits are observed
Overload limits exceeded (see Operating Instructions); correct the zero point
through the potentiometer Contents
No output signal Cable break Check connections and cable War n in g Safe Product Use
■ Safety Definitions . . . . . . . . . . . . . . . . . . . . . 1
➀ Adjusting the controller or display device can usually compensate for small changes in the output signal. Test the system for proper operation Follow any enclosed instructions and refer to the
after adjustments are made. An excessive change in the output signal indicates possible transducer damage. This may cause the output to be ■ Safety Instructions . . . . . . . . . . . . . . . . . . . . 1 product catalog for detailed product information. When
non-linear, requiring transducer replacement.
■ Mechanical Installation . . . . . . . . . . . . . . . . . 1 using a transducer, the total system design must be
considered to ensure safe, trouble-free performance.
Storage and Disposal ■ Service and Maintenance . . . . . . . . . . . . . . . 2 Function, material compatibility, adequate ratings,
■ Electrical Installation . . . . . . . . . . . . . . . . . . 2 proper installation, operation, and maintenance
Purge all media from the pressure transducer before storage or disposal of the transducer. are the responsibilities of the system designer and
War n i n g
■ Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . 3 user. Improper selection or misuse of the product
■ Troubleshooting Guide . . . . . . . . . . . . . . . . . 4 may result in serious personal injury or property
Mount the protection cap when storing a flush diaphragm pressure transducer to prevent damage. damage.
Dispose of transducer components and packaging materials in accordance with the respective waste Safety Definitions
treatment and disposal regulations of the region or country to which the transducer is supplied. Potential danger to life or of serious
injuries.
Mechanical Installation
War n in g
Swagelok Company For product technical data, including materials of Potential danger to life or of serious injuries
29500 Solon Road construction, see the Swagelok Industrial Pressure War n in g due to catapulting parts.
Solon Ohio 44139 U. S. A. Transducers catalog, MS-02-225. Potential danger of burns due to hot
Cau tio n surfaces.
Translations are available on www.swagelok.com
Notice, important information.
WARNING
Do not mix/interchange Swagelok products or The product complies with the applicable
components not governed by industrial design European directives.
standards, including Swagelok tube fitting end The product was tested and certified by
connections, with those of other manufacturers. CSA International. It complies with the 50 N·m (36 ft·lb) max.
Swagelok—TM Swagelok Company applicable Canadian standards on safety.
© 2004—2021 Swagelok Company Certificate-No.: 1567213
MS-CRD-PTI-S, RevG, December 2021
MS-CRD-PTI-S, RevG, December 2021 www.swagelok.com
Service and Maintenance Electrical Installation Wiring Diagrams
Zero and Span Adjustment Do not exceed the max. permissible power
Wa r ni ng
supply DC 30 V. Legend Power Supply Load
Do not twist or remove housing nut (+)
The shield / ground connection must be V dc+ Plus power
(+) supply
without first removing the fastening screw S+ Plus output signal
and electrical connector. Damage to the wired to ground to protect the instrument
from electromagnetic disturbances. (–) 0 V dc Minus power
(–) supply S– Minus output signal
connector wiring may result if not followed. (common, ground)
(common, ground)
The surfaces of the pressure transducer • Attach wiring to the appropriate terminals as shown,
may get hot during operation. (Fig. C) in diagrams on page 3. Wiring information is 2-Wire Systems
Cau ti on
also printed on the instrument label.
• Any DC power supply that meets the voltage
1. Disconnect the electrical connector by removing requirements of the transducer can be used. Be DIN EN 175301-803 L-plug Bendix, 6-pin, MIL plug Bendix, 4-pin, MIL plug
the fastening screw. See Fig. A certain that the voltage supply is higher than the (+) V dc+/S+ (+) V dc+/S+ (+) V dc+/S+
2. Adjust the zero point (Z) with the transducer in the minimum required voltage as determined by the
pressureless state. See Fig. B. maximum load equations.
3. Adjust the span (S) while using a pressure (-) 1 (-) F A B (-) A D
standard with adequate accuracy. See Fig. B. 3
Maximum Load Equations 2 E D C B C
4. Check the output signal to the transducer (-) (-) (-)
adjustment. Repeat steps 1 through 3 as Milliampere output signal, 2 wire
necessary. Output 4 to 20 mA
(+) 0 V dc/S– (+) 0 V dc/S– (+) 0 V dc/S–
5. Reassemble transducer as shown in Fig. A. Supply V dc = 10 to 30 V
Max. Load RL = (V dc – 10) / 0.02
Fig. A Terminals See drawings Direct wire,
M 12 × 1, 4 pin
Fastening Circular connector flying lead
screw Voltage output signal, 3 wire (+) V dc+/S+ (+) V dc+/S+
Output 0 to 5 V
Supply V dc = 10 to 30 V brown
(-) (-)
Min. Load RL > 5 kΩ 4 3
Sealing grey (shield)
Electrical gasket Terminals See drawings 1 2
connector (-) (-) green
Fig. B
Voltage output signal, 3 wire
Housing Output 0 to 10 V (+) 0 V dc/S– (+) 0 V dc/S–
nut
Supply V dc = 14 to 30 V
Electrical Min. Load RL > 10 kΩ
terminals
Terminals See drawings 3-Wire Systems
O-ring
DIN EN 175301-803 L-plug Bendix, 6-pin, MIL plug Bendix, 4-pin, MIL plug
(+) V dc+ (+) V dc+ V dc+
S+ (+)
(-) 1 (-) F A B A D
S+ (-)
Process Z = zero point Fig. C 3
E D C B C
connector adjustment 2
(+) (+) (+) S+
S = span
adjustment (-) 0 V dc/S– (-) 0 V dc/S– (-) 0 V dc/S–
Do not attempt to clear the pressure port M 12 × 1, 4 pin Direct wire,
with a screwdriver or other sharp objects Circular connector flying lead
as this may damage the sensing element grey (shield)
of the transducer. (+) V dc+ S+ (+) V dc+
brown
(-) 4 3 (-) S+
1 2
white
(+) (+)
green
(-) 0 V dc/S– (-) 0 V dc/S–
2 MS-CRD-PTI-S, RevG, December 2021 MS-CRD-PTI-S, RevG, December 2021 3
