Oldham iTrans 2 User Manual

58
Addr
Inst
R/W
Host
R/W
Range
Description
$0063
40119
R
R/W
MSB=$00 to
$18, LSB=$00 to
$3C
RTC Hours and Minutes
Holds the hours and minutes to which the
RTC should be set. The most significant
byte (MSB) represents the hour from $00
to $18 (00-24). The least significant byte
(LSB) represents the minutes from $00 to
$3C (00 to 60). Note that the seconds
default to zero ($00) each time the hours
and minutes are set.
Examples:
13:05 = $0D05
24:00 = $1800
40124
R
R/W
$0000 to $FFFF
Low Alarm Display Setting
Holds the value of the gas reading at
which the low alarm display will activate.
40125
R
R/W
$0000 to $FFFF
High Alarm Display Setting
Holds the value of the gas reading at
which the high alarm display will activate.
40126
R
R/W
$0000 to $03E8
Cal Gas Value
Holds the value of the calibration gas to
be used on the instrument. The range is
from $0000 to $03E8 (0 to 1000
10
).
40127
R/W
R
$0000 to $FFFF
Loop High Scaling
Holds a value which indicates the gas
reading represented by a 20 mA loop
output signal. The range is from $0000 to
$FFFF.
440102
R
R
$0000 to $FFFF
WX Scaled Reading
Use with WX series controller.
Table 6-2 ModBus Registers
NOTE: To get the ModBus reading, register 40103 must be read as well as
register 40102. Register 40103 specifies where the decimal should be
placed.

Oldham iTrans 2 Specifications

General

Enclosure	Aluminum or Stainless Steel
Target Gas	Combustibles, H2S, CO, O2
Output	4-20 mA, HART
Display	LCD
Hazardous Area Approval	ATEX, IECEx
Operating Humidity	0-99% RH (non-condensing)
Resolution	Varies by gas
Response Time	< 30 seconds
Protection Rating	IP66
Measurement Range	Varies by gas. Combustibles: 0-100% LEL, H2S: 0-100 ppm, CO: 0-500 ppm, O2: 0-25% vol, NH3: 0-100 ppm, Cl2: 0-10 ppm, HCN: 0-30 ppm, NO2: 0-10 ppm, SO2: 0-20 ppm

Summary

Chapter 1 | Overview

Overview of the Gas Monitor

Describes the iTRANS-2 fixed gas monitor, its capabilities, and features.

Specifications

Chapter 2 | Hardware Overview

Main Electronics Unit (Housing)

Sensor

Inputs – Intrusive and Non-Intrusive

Electronics Modules

Chapter 3 | Installation

Installation Considerations

Chapter 4 | System Wiring

Wiring Preparation

Alarm Relay Wiring

Details how to connect control wires to the relay terminals for alarm and fault signals.

Power and Output Wiring

Explains how to connect power supply and 4-20 mA output signals to connector J1.

Sensor Wiring

Describes connecting sensor wires to connector J3, including wire color coding.

Digital ModBus RTU Interface Wiring

Covers connecting the ModBus interface to digital control systems, PLCs, or HMIs.

Chapter 5 | Operation

Normal Operating Mode

Programming Mode Overview

Introduces the two programming modes (non-intrusive and push-button) and their functions.

Programming Mode – Non-intrusive Operation

Explains how to use a magnetic wand for configuration tasks like sensor type, zeroing, and calibration.

Zeroing

Explains the process of zeroing the instrument using keypad or magnetic wand.

Calibration

Details the process of calibrating the instrument using keypad or magnetic wand.

Changing Span Gas Concentration

Explains how to set the span gas concentration for calibration.

Programming Mode – Push Button Operation

Describes how to access programming options using physical keys after entering a password.

Entering Programming Mode and Selecting a Channel

Set Low Alarm

Details how to set the low alarm threshold for a channel.

Set High Alarm

Details how to set the high alarm threshold for a channel.

4-20 mA Analog Output Range

Chapter 6 | Modbus Interface

Sample Gas Reading via ModBus Network

Explains how to read gas readings from Channel 1 and Channel 2 via the ModBus network.

ModBus Register List

Provides a detailed list of ModBus registers, their addresses, and descriptions.

Chapter 7 | Maintenance

Sensor Replacement

Provides instructions for qualified personnel to replace a sensor.

Zero and Calibration

Details the methods for zeroing and calibrating the instrument.

Chapter 8 | Troubleshooting

Diagnosing Common Problems

Presents common symptoms, their potential problems, and solutions in a table format.

Fault Codes

Chapter 9 | Warranty

Appendix A | HART Interface

Electronics Modules

System Wiring

Power and Output Wiring

HART 4-20mA Wiring

Operation

Calibration and Zeroing Modes

Fault Mode

Open Loop Condition

Electronic Device Descriptor (EDD)

Read Commands

Write Commands

Operation Commands