Yamatake STG940 User Manual

ST3000 Smart Transmitter Series 900
Electronic Differential Pressure/
Pressure Transmitter
Model : STD, STG, STA, STC,
STE, STR, STH and STU
User’s Manual
CM2-STJ100-2001
First issue: Apr. 1999 Rev.3: Oct. 2003

Yamatake STG940 Specifications

General

Manufacturer	Yamatake
Model	STG940
Housing Material	Aluminum
Humidity	0 to 100% RH
Type	Transmitter
Measurement Type	Differential Pressure
Output Signal	4-20 mA
Process Temperature Limits	-40 to 120°C
Power Supply	10.5 to 42 V DC
Hazardous Area Approvals	ATEX, IECEx
Input	Differential Pressure
Operating Temperature	-40 to 85°C
Mounting	2-inch pipe

Summary

Safety

Explosion protected Models

Details on explosion-proof and dust-ignition-proof apparatus installations.

Complying with ATEX Directive

Information on intrinsic safety and flameproof enclosure compliance.

FM Intrinsically Safe System

Installation requirements for FM intrinsically safe systems.

Chapter 4 : Installation

4-2 : Mounting ST3000 Smart Transmitter

4-3 : Piping ST3000 Smart Transmitter

4-4 : Wiring ST 3000 Smart Transmitter

Instructions for wiring the ST3000 Smart Transmitter, including special models.

Chapter 5 : Operation of the Transmitter

5-2 : Setting Tag No. and Checking Specifications

Procedures for starting communications, setting tag numbers, and checking configurations.

5-3 : Measurement with STD type

5-9 : Zero-span Adjustment with Input Pressure Equivalent to Range

Procedure for adjusting zero and span based on input pressure.

5-10 : Set Range Calculation for Liquid Level Measurement

5-12 : External Zero and Span Adjustment (Option)

On-site zero/span adjustment procedures without using an SFC.

Chapter 6 : Operation Using SFC

6-2 : Functions of SFC

6-3 : Before communicating using SFC

6-4 : Check during operation

6-7 : Display and Change Transmitter Setting

Guide to displaying and changing various transmitter settings via SFC.

6-8 : Constant Current Source Mode

Chapter 7 : Maintenance and Troubleshooting

7-1 : Zero Adjustment

Detailed procedures for various zero adjustment methods.

7-2 : Saving and Restoring Data

7-3 : Disassembly and Assembly

7-4 : Calibrating Set Range and Output Signals

Procedures for calibrating set range and output signals.

7-5 : Erasing Calibrated Data

7-6 : Troubleshooting

Guidance for checking operation, handling errors, and diagnostic messages.

Appendix - Supplement Manual for HART® Communication Option

Section 1 : Starting Communications

Section 2 : Configuration

Section 4 : Calibration

Information on calibrating transmitter analog output and measuring range.

Section 5 : Service Setup Menu