Oldham iTrans 2 User Manual

57
Addr
Inst
R/W
Host
R/W
Range
Description
40115
W
R
Last Alarm Date (mmdd)
Holds the month and day when the
instrument had the last alarm.
High byte = $01 to $0C
Low byte = $01 to $1F
Examples:
Dec 25 is represented as $0C19
June 31 is represented as $061F
40116
W
R
Last Alarm Date (00yy)
Holds the last two digits of the year when
the instrument was last in alarm. The first
two digits are assumed to be “20”.
High byte = $00, Low byte = $02 to
$63
Examples:
2002 is represented by $02
2099 is represented by $63
40117
R
R/W
MSB=$01 to
$0C,
LSB=$01 to $1F
RTC Month and Day
Holds the month and day to which the real
time clock (RTC) calendar should be set.
The most significant byte (MSB)
represents the month from $01 to $0C (1-
12). The least significant byte (LSB)
represents the day of the month from $01
to $1F (1-31).
Examples:
December 25 = $0C19
June 30 = $061E
40118
R
R/W
$0002 to $0063
RTC Year (00yy)
Holds the year to which the real time clock
(RTC) should be set. The most significant
byte (MSB) is always $00. The least
significant byte (LSB) represents the two-
digit year (within the 21
st
century), from
$02 (which represents 2002) to $063
(which represents 2099).
Examples:
2002 = 02 (+ base year of 2000) =
$0002
2010 = 10 (+ base year of 2000) =
$000A
2099 = 99 (+ base year of 2000) =

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