Design Division Spec # 3403

Functional Specifications
Engineering Services Rev # 3
11 - High, Mumbai PRESSURE TRANSMITTER Discipline Instt.
ISO 9000: 2000 ELECTRONIC Page # 1 of 6

FUNCTIONAL SPECIFICATION

FOR

PRESSURE TRANSMITTER
(ELECTRONIC)

TOTAL
PREPARED / REVIEWED REV.
APPROVED BY No. OF DATE
REVISED BY BY No.
PAGES
VS SRS GRP 6 18.02.2008 3
AK BK GRP 8 28..03.2007 2
AK BK GRP 8 31..08.2006 1
AK MC AC 8 25.08.2003 0

FORMAT No. Ref. PROCEDURE No. ISSUE No. REV. No. REV. DATE:
DD/SOF/004A/B DD/SOP/008 TO 015 02 01 01/08/2006
 Design Division Spec # 3403
Functional Specifications
Engineering Services Rev # 3
11 - High, Mumbai PRESSURE TRANSMITTER Discipline Instt.
ISO 9000: 2000 ELECTRONIC Page # 2 of 6

CONTENTS

Clause No. ITEM Page No.

1.0 Scope of This Document 3
2.0 Codes and Standards 3
2.1 Reference specifications 3
3.0 Scope of Supply 3
4.0 Pressure transmitter (electronic) 3
4.1 Type 3
4.2 Material 4
4.3 Accuracy 4
4.4 Reading scales 4
4.5 Enclosure class 4
Annexure I Hook-up drawing 5
Annexure II Data Sheet Format 6

FORMAT No. Ref. PROCEDURE No. ISSUE No. REV. No. REV. DATE:
DD/SOF/004A/B DD/SOP/008 TO 015 02 01 01/08/2006
 Design Division Spec # 3403
Functional Specifications
Engineering Services Rev # 3
11 - High, Mumbai PRESSURE TRANSMITTER Discipline Instt.
ISO 9000: 2000 ELECTRONIC Page # 3 of 6

1.0 SCOPE OF THIS DOCUMENT:

1.1 This functional specification describes the essential design considerations for the
selection of Pressure transmitter (electronic) for the intended service.
2.0 CODES & STANDARDS:
2.1 Reference Documents and Specifications:
a) Instrumentation Design Criteria
b) Basic Bid Work
c) Project P & IDs
d) Process Design Criteria / Instrument Process Data Sheets / Instrument List with
Process Parameters
3.0 SCOPE OF SUPPLY:
3.1 The quantity to be supplied and installed shall be as per the requirements indicated
in the Basic Bid Work, Design Criteria and the P & IDs.

3.2 The vendor shall be responsible for the selection of the Pressure transmitter
(electronic) suitable for its intended application, its procurement, tagging, packing,
testing & calibration, preparation for shipment, along with accessories, spares, and
assistance where required for its installation & commissioning at site. This FS shall
be read in conjunction with the Instrument Design Criteria.

4.0 ELECTRONIC PRESSURE TRANSMITTER:

4.1 Type:
4.1.1 Electronic type.
4.1.2 General:
4.1.2.1 Transmitters shall use HART protocol for communication. Smart type transmitters
shall be supplied with required number of hand held calibrators.
4.1.2.2 Transmitters shall be immune to Radio frequency interference due to walkie-talkie,
paging system, communication system etc. All electronic modules shall be
designed for short circuit protection.
4.1.2.3 Span shall be continuously adjustable over the transmitter range. The Electronic
PT shall be provided with ½”NPT (F) cable entries.
4.1.2.4 The transmitter signal range shall be 4-20mA, DC, 2 wire type and capable of
delivering the rated current signal into external load of 600 ohms when powered
with 24V DC.
4.1.2.5 All transmitters shall be provided with integral output meters. The output meter
shall be suitable for use in the hazardous area.

FORMAT No. Ref. PROCEDURE No. ISSUE No. REV. No. REV. DATE:
DD/SOF/004A/B DD/SOP/008 TO 015 02 01 01/08/2006
 Design Division Spec # 3403
Functional Specifications
Engineering Services Rev # 3
11 - High, Mumbai PRESSURE TRANSMITTER Discipline Instt.
ISO 9000: 2000 ELECTRONIC Page # 4 of 6

4.1.2.6 The change in out put due to change in ambient temperature (10 degree Celsius)
should be very minimum.
4.1.2.7 All the transmitters shall be Ex d .
4.1.2.8 Electronic PT shall have externally adjustable zero and span. Setting adjustment
shall have locking adjustment
4.1.2.9 Process connection from bottom side, 316SS threaded ½” NPTF.
4.1.2.10 Over range protection shall be 130% of range or maximum pressure whichever is
higher.
4.1.2.11 Transmitter shall be furnished with all necessary weather and anti-corrosion
protection to prevent damage from saline and corrosive process atmosphere.
4.1.2.12 All pressure instruments shall be mounted as close as possible to sensing point.
4.2 Material:
The material requirements for Electronic PT shall in general be according to clause
3.6.4.5 of Instrumentation Design Criteria.
Transmitter body studs shall be high tensile stainless steel, or other corrosion-
resistant material for higher stress levels.
Instrument parts shall be resistant to the corrosive properties of the process fluid
and ambient conditions to which they are exposed.
4.3 Accuracy:
±0.1% of FSD or better.
4.4 Reading Scales:
Output signal shall be in mA.
4.5 Enclosure Class:
In addition to weatherproof, the Electronic PT enclosure shall be explosion-proof
to NEMA 7 and certified by third party statutory bodies like UL/FM/BASEEFA or
equal for use in hazardous area (CL 1, DIV.1, GR.D).

FORMAT No. Ref. PROCEDURE No. ISSUE No. REV. No. REV. DATE:
DD/SOF/004A/B DD/SOP/008 TO 015 02 01 01/08/2006
 Design Division Spec # 3403
Functional Specifications
Engineering Services Rev # 3
11 - High, Mumbai PRESSURE TRANSMITTER Discipline Instt.
ISO 9000: 2000 ELECTRONIC Page # 5 of 6

ANNEXURE – I
(Hook Up Drawing)

FORMAT No. Ref. PROCEDURE No. ISSUE No. REV. No. REV. DATE:
DD/SOF/004A/B DD/SOP/008 TO 015 02 01 01/08/2006
 Design Division Spec # 3403
Functional Specifications
Engineering Services Rev # 3
11 - High, Mumbai PRESSURE TRANSMITTER Discipline Instt.
ISO 9000: 2000 ELECTRONIC Page # 6 of 6

ANNEXURE-II :- Typical data sheet for Pressure Transmitter

PRESSURE TRANSMITTER (ELECTRONIC)

UNITS :- Flow Liquid – M3/HR Gas – NM3/HR Pressure – kg/cm2 Temperature – deg C Level/length -M

1 Type DIAPHRAGM SEAL (Wherever Required)

2 Function 22 Type
3 Mounting 23 Wetted Parts
4 Case & Material 24 Other Material
5 Electrical Area Class 25 Process Connection
6 Enclosure Class 26 Facing & Finish
7 Intrinsically Safe 27 Capillary Material
8 Air Supply 28 Armour Material
9 Power Supply 29 Capillary Length
10 Cable entry 30 Flushing Filling conne.
11 Accuracy
12 Repeatability MISCELLANIOUS
TRANSMITTER Over range protection
13 Out put Blow out protection
14 Power supply Options
15 MEASURING UNIT a) Mounting accessories
16 Service c) Intrinsically
safe weather
proof out put
meter
Pressure gauges for
supply, input and output
17 Pressure Element
Type
18 Element Material 33 Load driving capability
19 Socket Material
20 Body Material
21 Connection location

TAG RANGE OPERATING PRESSURE TEMP. FLUID SERVICE

OPTIONS
No. PRESSURE OVER MAX OPER MAX

Note
Vendor Seal and Sign

FORMAT No. Ref. PROCEDURE No. ISSUE No. REV. No. REV. DATE:
DD/SOF/004A/B DD/SOP/008 TO 015 02 01 01/08/2006