Oldham iTrans User manual

FIXED POINT SINGLE OR DUAL GAS MONITOR WITH DUAL
ANALOG OUTPUTS
USER MANUAL
iTrans
FIXED POINT SINGLE OR DUAL
GAS MONITOR WITH DUAL
ANALOG OUTPUTS
Part Number: 77023554-1
Version: 16.0
Release Date: April 20, 2016
The Fixed Gas Detection Experts

ii iTrans User Manual (P/N: 77023554-1)
Copyright © 2016 by Oldham S.A.S
All rights reserved. No reproduction of all or part of this document, in any form, is
permitted without the written consent of Oldham S.A.S.
is a trademark of Oldham.
ModBus® is a registered trademark of Schneider Automation Inc.
ModBus® protocol™ is a trademark of Schneider Automation Inc.
All other trademarks and registered trademarks are the property of their respective
owners.
All of the information that is provided in this document is accurate to the best of
our knowledge.
As a result of continuous research and development, the specifications of this
product may be changed without prior notice.
Oldham S.A.S
Rue Orfila
Z.I. Est –CS 20417
F–62027 ARRAS Cedex
Tel.: [phone]
Fax: [phone]

(P/N: 77023554-1) iTrans User Manual iii
Warnings and Cautionary Statements
CAUTION: Failure to perform certain procedures or note certain conditions may
impair the performance of the monitor. For maximum safety and performance,
please read and follow the procedures and conditions outlined below.
Oxygen deficient atmospheres may cause combustible gas readings that use
catalytic LEL sensors to be lower than actual concentrations.
Oxygen enriched atmospheres may cause combustible gas readings that use
catalytic LEL sensors to be higher than actual concentrations.
Calibrate the catalytic combustible gas sensor after each incident where the
combustible gas content causes the instrument to enter in the OVER-RANGE
alarm condition.
Silicone compound vapors may affect the catalytic combustible gas sensor and
cause readings of combustible gas to be lower than actual gas concentrations. If
the sensor has been used in an area where silicone vapors were present, always
calibrate the instrument before continued use to ensure accurate measurements.
Sensor openings must be kept clean. Obstruction of the sensor openings may
cause readings to be lower than actual gas concentrations.
Sudden changes in atmospheric pressure may cause temporary fluctuations in
the oxygen readings.
Alarms relays are non-latching.
When connecting 4-20 mA outputs to inductive loads, Oldham recommends
using an isolation barrier in line with the 4-20 mA signal.
Interior grounding terminal is to be used for grounding, the exterior terminal is
only to be used for bonding
iTrans Stand-Alone versions with on-board visible alarm are to be
installed in ordinary locations only; however, remote sensors can be
installed in hazardous locations (Gas dependent. Read Agency
Approvals paragraph).

iv iTrans User Manual (P/N: 77023554-1)
CALIBRATION ALERT: Gas detection instruments are potential life-saving
devices. Recognizing this fact, calibration for the toxic and catalytic LEL sensors
should be at least at quarterly intervals, while the infrared sensor should be
calibrated on an annual basis with function test every 6 months.
Further, Oldham recommends prudent testing and/or includes calibration after a
gas alarm. All calibration service to sensors should be recorded and accessible.
CAUTION: For safety reasons, this equipment must be operated and serviced by
qualified personnel only.

iTrans Fixed Point Single/Dual Gas Monitor Table of Contents
(P/N: 77023554-1) iTrans User Manual v
Table of Contents
CHAPTER 1: INTRODUCTION
1.1. Overview of the Gas Monitor............................................................................1-1
1.2. Specifications .........................................................................................................................1-1
1.3. Agency Approvals - CSA.......................................................................................................1-3
1.4. Special Instructions for Safe Use (EU) ..................................................................................1-5
CHAPTER 2: HARDWARE OVERVIEW
2.1. Main Electronics Unit (Housing) ...........................................................................................2-1
2.2. Sensor.....................................................................................................................................2-2
2.3. Display....................................................................................................................................2-3
2.4. Inputs –Intrusive and Non-Intrusive......................................................................................2-3
2.5. Electronics Modules...............................................................................................................2-4
CHAPTER 3: INSTALLATION
3.1. Introduction............................................................................................................................3-1
3.2. Installation Considerations.....................................................................................................3-1
3.3. Wall Mounting........................................................................................................................3-1
3.4. Column Mounting ..................................................................................................................3-1
CHAPTER 4: SYSTEM WIRING
4.1. Introduction............................................................................................................................4-1
4.2. Wiring Preparation .................................................................................................................4-1
4.3. Alarm Relay Wiring (J1, J5, and J6)......................................................................................4-2
4.4. Power and Output Wiring (J1) ...............................................................................................4-3
4.5. Sensor Wiring (J3)..................................................................................................................4-4
4.6. Digital ModBus RTU Interface Wiring (J1) ..........................................................................4-9
4.6.1. ModBus Interface Wiring Overview..........................................................................4-9
4.6.2. Setting the ModBus Address on the ......................................................4-9
4.6.3. Setting the ModBus Address for Stand-Alone Sensors...........................................4-10
4.7. Wiring Conclusion................................................................................................................4-12
CHAPTER 5: OPERATION
5.1. Initial Start-up.........................................................................................................................5-1
5.2. Warm-up Period.....................................................................................................................5-1
5.3. Normal Operating Mode.........................................................................................................5-2
5.4. Programming Mode Overview...............................................................................................5-3
5.5. Programming Mode –Non-intrusive Operation.....................................................................5-4
5.5.1. Introduction................................................................................................................5-4
5.5.2. Sensor Type ...............................................................................................................5-5
5.5.3. Zeroing.......................................................................................................................5-5
5.5.4. Calibration..................................................................................................................5-6
5.5.5. Changing Span Gas Concentration............................................................................5-7
5.5.6. Sensor Span Reserve..................................................................................................5-8
5.6. Programming Mode –Push Button Operation.......................................................................5-8
5.6.1. Introduction................................................................................................................5-8
5.6.2. Entering Programming Mode and Selecting a Channel.............................................5-9
5.6.3. Set Low Alarm.........................................................................................................5-10

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vi iTrans User Manual (P/N: 77023554-1)
5.6.4. Set High Alarm........................................................................................................5-10
5.6.5. 4-20 mA Analog Output Range...............................................................................5-10
5.6.6. Set System Time –Minute.......................................................................................5-11
5.6.7. Set System Time –Hour..........................................................................................5-11
5.6.8. Set System Time –Date...........................................................................................5-12
5.6.9. Set System Time –Month........................................................................................5-12
5.6.10. Set System Time –Year..........................................................................................5-13
5.6.11. Zeroing ....................................................................................................................5-13
5.6.12. Calibration...............................................................................................................5-14
5.6.13. Changing Span Gas Concentration..........................................................................5-15
5.6.14. Sensor Span Reserve................................................................................................5-16
5.6. Special Notes on Using Broadband Infrared (BBIR) Sensors..............................................5-17
CHAPTER 6: MODBUS INTERFACE
6.1. Introduction............................................................................................................................6-1
6.2. Sample Gas Reading via ModBus Network...........................................................................6-1
6.3. ModBus Register List ............................................................................................6-2
6.4. ModBus Resources.................................................................................................................6-6
6.5. Termination ............................................................................................................................6-6
CHAPTER 7: MAINTENANCE
7.1. Introduction............................................................................................................................7-1
7.2. Sensor Replacement ...............................................................................................................7-2
7.3. Zero and Calibration...............................................................................................................7-2
CHAPTER 8: TROUBLESHOOTING
8.1. Introduction............................................................................................................................8-1
8.2. Diagnosing Common Problems..............................................................................................8-1
8.3. Fault Codes.............................................................................................................................8-2
8.4. Function Codes.......................................................................................................................8-3
CHAPTER 9: WARRANTY
9.1. Warranty.................................................................................................................................9-1
9.2. Limitation of Liability............................................................................................................9-1
APPENDIX A: ACRONYMS AND ABBREVIATIONS
APPENDIX B: DECIMAL, BINARY, AND HEXADECIMAL EQUIVALENTS
APPENDIX C: ORDERING MATRIX
APPENDIX D: FACTORY DEFAULT SETTINGS
APPENDIX E: EU DECLARATION OF CONFORMITY CERTIFICATE
APPENDIX F: INDEX 

iTrans Fixed Point Single/Dual Gas Monitor Introduction
(P/N: 77023554-1) iTrans User Manual 1-1
INTRODUCTION
Chapter
1
1.1. Overview of the Gas Monitor
The fixed gas monitor is an
independent monitor capable of
displaying one or two gas
concentrations as well as sensor or
instrument comes standard with
independent 4-20 mA outputs for each
channel, making it ideal for interfacing
to control units. A digital ModBus
RTU interface is also available,
allowing the to interface to
digital control systems. The
is available with an optional relay
board, allowing the unit to directly
control external devices such as fans,
pumps, alarm horns, or warning lights.
Two of the relays can be programmed
for alarm activation, while the third
relay is a fault protection relay.
Figure 1-1. Typical Gas
Monitor with Single Gas Sensor
(Stainless Steel Option)
Calibration, changing span gas concentration, and checking the instrument’s
configuration are easily accomplished using the non-intrusive magnetic wand.
The is powered with a 24 VDC (12-28 VDC) power supply and
provides a 4-20 mA control signal for each sensor.
1.2. Specifications
Specifications for the gas monitor are listed in Table 1-1.

Introduction iTrans Fixed Point Single/Dual Gas Monitor
1-2 iTrans User Manual (P/N: 77023554-1)
Table 1-1. Specifications for the Monitor
Item
Description
Enclosure
Cast aluminum, poly-bonded coating or 316 stainless steel. Both are
explosion-proof, NEMA 4X, IP66 rated.
Dimensions
5.0 6.0 5.0 inches (127 153 129 mm)
Sensors
Combustible Gases: Catalytic bead and/or Non-Dispersive Infrared
(NDIR)
Oxygen/Toxic Gases: Electrochemical diffusion
Input Voltage
12-28 VDC operating range (24 VDC typical), 350 mA (nominal)
Maximum current draw of 600 mA with 2 LEL sensors installed
Input Current
(Max)
Toxic Gas/Oxygen
150 mA @ 24 VDC (single gas)
Combustible Gases
(Catalytic)
175 mA @ 24 VDC, 0.6 A peak (single gas)
Combustible Gases
(Infrared)
150 mA @ 24 VDC, 0.6 A peak (single gas)
Combined
Catalytic/Infrared
280 mA @ 24 VDC (two gas)
Display
Dual-channel split-screen LED display (4-digit, 7-segment
arrangement per channel) provides simultaneous display of one or two
gases.
Signal
Outputs
Digital
ModBus RTU: RS485 digital communication with
ModBus RTU software protocol system at 9600 baud.
Three- or four-wire system accommodates over 200
devices in bus configuration. Address selection through
on-board 8-position DIP switch. NOTE: ModBus is not
to be used for CSA C22.2 No. 152 compliance.
Analog
4-20 mA (linear analog)
Alarm Relays
Quantity
3 alarm relays: Two user-programmable relays, SPST,
N.O.; plus one fault relay, SPST, N.C.
Contact
Capacity
5A @ 30 VDC
5A @ 30 VAC
Temperature
Range
-40º C ~ +75º C (-40º F ~ +167º F)
-20º C ~ +50º C (-4º F ~ +122º F) for BBIR only
Humidity
Range
10% - 90% RH (non-condensing), typical
Pressure
Atmospheric pressure 10%

iTrans Fixed Point Single/Dual Gas Monitor Introduction
(P/N: 77023554-1) iTrans User Manual 1-3
Table 1-2. Sensor Ranges
Sensor
Gas
Range/Resolution
Combustible Gases
LEL
0 -100% LEL in 1% increments
Hydrogen
H2
0 - 999 ppm in 1 ppm increments
Oxygen
O2
0 - 30.0% by vol. in 0.1% increments
Ammonia
NH3
0 - 500 ppm in 1 ppm increments
Carbon Monoxide
CO
0 - 999 ppm in 1 ppm increments
Carbon Monoxide/H2Null
CO
0 - 999 ppm in 1 ppm increments
Hydrogen Sulfide
H2S
0 - 500 ppm in 1 ppm increments
Sulfur Dioxide
SO2
0.2 - 99.9 ppm in 0.1 ppm increments
Hydrogen Cyanide
HCN
0.2 –30.0 ppm in 0.1 ppm increments
Hydrogen Chloride
HCl
0.2 - 30.0 ppm in 0.1 ppm increments
Phosphine
PH3
0 - 1.00 ppm in 0.01 ppm increments
Nitrogen Dioxide
NO2
0.2 - 99.9 ppm in 0.1 ppm increments
Nitric Oxide
NO
0 - 999 ppm in 1 ppm increments
Chlorine
Cl2
0.2 - 99.9 ppm in 0.1 ppm increments
Chlorine Dioxide
ClO2
0.02 - 1.00 ppm in 0.01 ppm increments
1.3. Agency Approvals
The is certified by CSA, a NRTL laboratory, to the following US and
Canadian Standards.
UL Std No. 916-Energy Management Equipment
UL Std No. 1203-Explosion-Proof and Dust-Ignition-Proof
oElectrical Equipment for Use in Hazardous (Classified) Locations
UL Std No. 1604-Division 2 Hazardous Location Electrical Equipment
ISA S12.13 Part I-2000-Performance Requirements, Combustible Gas
Detectors (catalytic sensors only)
CSA Std C22.2 No.30-M1986-Explosion-Proof Enclosures for Use in
Class I Hazardous Locations
CSA Std C22.2 No.142-M1987-Process Control Equipment

Introduction iTrans Fixed Point Single/Dual Gas Monitor
1-4 iTrans User Manual (P/N: 77023554-1)
CSA Std C22.2 No. 152-M1984-Combustible Gas Detection Instruments
(catalytic sensors only)
CSA Std C22.2 No. 213-M1987-Non-incendive Electrical Equipment for
Use in Class I, Division 2 Hazardous Locations
Marking: Transmitter Class I, Div 1, Groups B, C, D –AEx d IIB + H2 T5
Sensor(gas dependent) (1) Class I, Div 1, Groups B, C, D –AEx d IIB + H2 T5
(2) Class I, Div 2, Groups A, B, C, D –AEx d IIB + H2 T5
Ambient for Model 7701-5857 Fixed IR sensor (BBIR) is -20C to +55C. Ambient for all other devices is
-40C to +75C.
The is certified under the IECEx scheme to:
IEC 60079-0:2007 - Electrical apparatus for potentially explosive
atmospheres–General requirements.
IEC 60079-1:2003 - Electrical apparatus for potentially explosive
atmospheres–Flameproof enclosures ‘d’.
IEC 60079-15:2005 - Electrical apparatus for explosive gas atmospheres.
Type of protection "n".
Marking: Transmitter Ex d IIB+H2 T5; IP66; Ta (-40°C to +75°C)
Sensor(gas dependent) (1) Ex d IIB+H2 T5 ; IP66 ; Ta (-40°C to +75°C)
(2) Ex nA II T5; Ta (-40°C to +75°C)
The complies with relevant provisions, per listed standards, of European
ATEX Directive 94/9/EC and EMC Directive 89/336/EEC, amended by Directives
92/31/EEC and 93/68/EEC, and is constructed with reference to published
standards of Directive 72/23/EEC, to eliminate electrical risks and fulfill 1.2.7 of
Annex II of Directive 94/9/EC.
EN 60079-0:2004 - Electrical apparatus for potentially explosive
atmospheres –General requirements.
EN 60079-1:2004 - Electrical apparatus for potentially explosive
atmospheres –Flameproof enclosures ‘d’.
EN 60079-15:2003 - Electrical apparatus for explosive gas atmospheres.
Type of protection “n”.

iTrans Fixed Point Single/Dual Gas Monitor Introduction
(P/N: 77023554-1) iTrans User Manual 1-5
EN 50270: Electromagnetic compatibility - Electrical apparatus for the
detection and measurement of combustible gases, toxic gases or oxygen (for
Type 2 [Industrial] Apparatus).

The EC type examination certificate is KEMA 04 ATEX 2216X, with
Marking code: Transmitter Ex d IIB+H2 T5; Ta (-40°C to +75°C)
Sensor(gas dependent) (1) Ex d IIB+H2 T5 ; Ta (-40°C to +75°C)
(2) Ex nA II T5; Ta (-40°C to +75°C)
(1) LEL, H2, O2, CO, H2S, SO2, HCN, PH3, NO2, NO, CO2
(2) Cl2, HCl, NH3, ClO2

Introduction iTrans Fixed Point Single/Dual Gas Monitor
1-6 iTrans User Manual (P/N: 77023554-1)
1.4. Special Instructions for Safe Use (EU)
Cable connection: The cable entry device shall be of a certified flameproof
type, suitable for the conditions of use and correctly installed.
Conduit Connection: An Ex d certified sealing device, such as, a conduit
seal with setting compound, suitable for the conditions of use, and correctly
installed, shall be provided immediately to the entrance of the housing.
Unused openings: Unused openings shall be closed with suitable Ex d
certified closing elements.
Dual Onboard: The “Y” adapter parts used to assemble dual onboard
configurations do not have Atex approval. Consult factory for dual onboard
Atex options.


iTrans Fixed Point Single/Dual Gas Monitor Introduction
(P/N: 77023554-1) iTrans User Manual 1-7

iTrans Fixed Point Single/Dual Gas Monitor Hardware Overview
(P/N: 77023554-1) iTrans User Manual 2-1
HARDWARE OVERVIEW
Chapter
2
2.1. Main Electronics Unit (Housing)
The body is a cast aluminum housing that contains the electronics of the
gas monitor. Details of a single-gas housing are shown in Figure 2-1.
NOTE: Dimensions are in inches.
Figure 2-1. Details of a Single-Gas Gas Monitor

Hardware Overview iTrans Fixed Point Single/Dual Gas Monitor
2-2 iTrans User Manual (P/N: 77023554-1)
2.2. Sensor
Table 2-3. Sensor Specifications
Item
Descriptions
Catalytic and Toxics
Infrared (BBIR)
Sensor
Housing
Material
Aluminum, Anodized
Explosion-proof: Class I, Divisions 1
and 2, Groups B, C, D and Ex d IIB
+H2 T5 (ATEX and IECEx), Ex d
IICT6 Gb (China)
Stainless Steel
Explosion-proof: Class I,
Divisions 1 and 2 Groups B,
C, D, and Ex d IIB +H2 T4
(Europe), Ex d IIC T4 or IIC
T6 (China)
Aluminum, Anodized w/Gore-Tex
Membrane: Class I, Division 2, Groups
A, B, C, D and Ex nA IIC T5 (IECEx)
and Ex nA II T5 (ATEX).
Dimensions
3.0 3.0 inches (76 76 mm)
3.5 3.0 inches (89 76 mm)
Accuracy
< 3% Toxic and Oxygen
< 5% Combustibles
Protection
Class
IP 66 or NEMA4X

iTrans Fixed Point Single/Dual Gas Monitor Hardware Overview
(P/N: 77023554-1) iTrans User Manual 2-3
2.3. Display
The gas monitor has a 4-digit, 7-segment LED display for each of 2
channels. A dual-gas sensor and sample display are shown in
Figure 2-2.
Figure 2-2. The Display (Dual-Gas Monitor Shown)
2.4. Inputs –Intrusive and Non-Intrusive
The gas monitor can be configured using intrusive and non-intrusive
means. Both methods of configuration are accomplished through physical inputs
that are visible behind the glass panel of the gas monitor.
A set of four keys are used when intrusive programming is appropriate (i.e., when
the enclosure can be removed and when the keys can be manually pressed). These
keys are the mode, increment (+), decrement (-), and enter keys. Refer to
Figure 2-3.
For applications that require non-intrusive manipulation, two magnetically-
activated reed switches are used to accomplish programming without removing the
cover. A magnetic wand is positioned over the appropriate reed switch (above the
glass face plate) without the wand physically touching the reed switches. The
locations of the reed switches are shown in Figure 2-3.

Hardware Overview iTrans Fixed Point Single/Dual Gas Monitor
2-4 iTrans User Manual (P/N: 77023554-1)
Figure 2-3. Locations of Input Keys and Reed Switches
Programming the gas monitor in both intrusive and non-intrusive modes
is explained in detail in Chapter 5: Operation.
2.5. Electronics Modules
The electronics module of the gas monitor contains connectors and
jumpers for wiring and configuring the device. The electronics module for a main
unit is shown in Figure 2-4. The electronics module for a remote unit is
shown in Figure 2-5. Wiring details are explained in Chapter 4: System Wiring.

iTrans Fixed Point Single/Dual Gas Monitor Hardware Overview
(P/N: 77023554-1) iTrans User Manual 2-5
Figure 2-4. Electronics Module for (Main Unit)
Figure 2-5. Electronics Board for Remote Sensor


Hardware Overview iTrans Fixed Point Single/Dual Gas Monitor
2-6 iTrans User Manual (P/N: 77023554-1)