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iTrans Fixed Point Single/Dual Gas Monitor

Hardware Overview

(P/N: 77023554)

INDUSTRIAL SCIENTIFIC

2-3

Table 2-2. Sensor Specifications

Descriptions

Item

Catalytic and Toxics

Infrared

Aluminum, Anodized
Explosion-proof: Class I, Divisions 1
and 2 Groups B, C, D, and EEx d IIB
+H2 T5 (Europe)

, Ex d IICT4 or CT6

(China)

Sensor
Housing
Material

Aluminum, Anodized w/Gore-Tex
Membrane (Division 2/Zone 2 toxics)
Suitable for Class I, Division 2 Groups
A, B, C, D, and EEx nA II T5 (Europe).

Stainless Steel
Explosion-proof: Class I,
Divisions 1 and 2 Groups B,
C, D, and EEx d IIB +H2 T4
(Europe)

, Ex d IICT4 or

CT6 (China)

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

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)

Summary of Contents for iTrans 77023554

Page 1: ...FIXED POINT SINGLE OR DUAL GAS MONITOR WITH DUAL ANALOG OUTPUTS Installation Operation Wiring Troubleshooting Part Number 77023554 Version 10 Release Date October 27 2009 ...

Page 2: ...trademarks and registered trademarks are the property of their respective owners Industrial Scientific Corporation Phone 1 412 788 4353 1001 Oakdale Road Toll Free 1 800 DETECTS 338 3287 Oakdale PA 15071 1500 Fax 1 412 788 8353 USA Service 1 888 788 4353 Web www indsci com Although every effort is made to ensure accuracy the specifications of this product and the content herein are subject to chan...

Page 3: ... 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 ...

Page 4: ...th portable instruments and fixed point systems for detecting measuring and monitoring a wide variety of gases including toxic and combustible gases as well as oxygen From research and development through final manufacturing we never forget that human lives depend on what we do That workers all over the world enter confined spaces face the risk of asphyxiation poisoning or explosion and depend on ...

Page 5: ...ration 4 1 4 3 Alarm Relay Wiring J1 J5 and J6 4 2 4 4 Power and Output Wiring J1 4 4 4 5 Sensor Wiring J3 4 5 4 6 Digital ModBus RTU Interface Wiring J2 4 14 4 6 1 ModBus Interface Wiring Overview 4 14 4 6 2 Setting the ModBus Address on the 4 14 4 6 3 Setting the ModBus Address for Stand Alone Sensors 4 15 4 7 Wiring Conclusion 4 16 CHAPTER 5 OPERATION 5 1 Initial Start up 5 1 5 2 Warm up Period...

Page 6: ...via ModBus Network 6 2 6 3 Special Notes on Using Broadband Infrared BBIR Sensors 6 2 6 4 ModBus Register List 6 3 6 5 Setting the ModBus Address on the 6 7 6 6 Setting the ModBus Address for Stand Alone Sensors 6 8 6 7 ModBus Resources 6 10 6 8 Termination 6 10 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 Introduc...

Page 7: ... Stand Alone 4 7 Figure 4 8 Electronics Module for Remote Unit 4 8 Figure 4 9 Wiring Diagram for Dual On board Sensors 4 9 Figure 4 10 Wiring Remote Sensors Back to 4 10 Figure 4 11 Wiring One Remote Sensor and One On Board Sensor 4 11 Figure 4 11 Wiring One Remote Sensor and One On Board Sensor Continued 4 12 Figure 4 12 Wiring Dual Remote Sensors 4 13 Figure 4 13 Wiring Diagram for the ModBus In...

Page 8: ... 5 12 Figure 5 21 Setting System Date 5 12 Figure 5 22 Setting System Month 5 13 Figure 5 23 Setting System Year 5 13 Figure 5 24 Sample Zeroing Display 5 14 Figure 5 25 Sample Calibration Display 5 14 Figure 5 26 Sample Zeroing Display 5 15 Figure 5 27 Sample Calibration Display 5 15 Figure 5 28 Sample Span Gas Concentration Display 5 15 Figure 5 29 Flashing Status Bit 5 16 Figure 5 30 Sample Spa...

Page 9: ...able 5 2 Function Codes 5 17 CHAPTER 6 MODBUS INTERFACE Table 6 1 ModBus Characteristics for the Gas Monitor 6 1 Table 6 2 ModBus Registers 6 3 CHAPTER 8 TROUBLESHOOTING Table 8 1 Common Problems 8 1 Table 8 2 Fault Codes 8 2 Table 8 3 Function Codes 8 3 APPENDIX A ACRONYMS AND ABBREVIATIONS Table A 1 Acronyms and Abbreviations A 1 APPENDIX B DECIMAL BINARY AND HEXADECIMAL EQUIVALENTS Table B 1 He...

Page 10: ...List of Tables iTrans Fixed Point Single Dual Gas Monitor x INDUSTRIAL SCIENTIFIC P N 77023554 ...

Page 11: ...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 Calibration changing span gas concentration and c...

Page 12: ...ared 150 ma 24 VDC 0 6 A peak single gas Input Current Max 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 Digital ModBus RTU RS485 digital communication with ModBus RTU software protocol system at 9600 baud Three or four wire system accommodates over 200 devi...

Page 13: ...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 2 00 ppm in 0 01 ppm increments 1 3 Agency Approvals CSA The is certified by CSA a NRTL laboratory to the following US and Canadian Standards UL Std No 916 Energy Management Equipment UL Std ...

Page 14: ...Annex II of Directive 94 9 EC EN 60079 0 Electrical apparatus for potentially explosive atmospheres General requirements EN 60079 1 Electrical apparatus for potentially explosive atmospheres Flameproof enclosures d EN 60079 15 Electrical apparatus for explosive gas atmospheres Type of protection n EN 50270 Electromagnetic compatibility Electrical apparatus for the detection and measurement of comb...

Page 15: ...Connection An EEx 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 EEx d certified closing elements ...

Page 16: ......

Page 17: ...NTIFIC 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 ...

Page 18: ...onoxide CO 0 999 ppm in 1 ppm increments Carbon Monoxide H2 Null 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 Div 2 Zone 2 Phosphine PH3 0 1 00 ppm in 0 01 ppm increments Nitrogen Dioxide NO2 0 ...

Page 19: ...x Membrane Division 2 Zone 2 toxics Suitable for Class I Division 2 Groups A B C D and EEx nA II T5 Europe Stainless Steel Explosion proof Class I Divisions 1 and 2 Groups B C D and EEx d IIB H2 T4 Europe Ex d IICT4 or CT6 China 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 2 3 Display The gas monitor has a 4 ...

Page 20: ...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 t...

Page 21: ...ectronics 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 Figure 2 4 Electronics Module for Main Unit ...

Page 22: ...Hardware Overview iTrans Fixed Point Single Dual Gas Monitor 2 6 INDUSTRIAL SCIENTIFIC P N 77023554 Figure 2 5 Electronics Board for Remote Sensor ...

Page 23: ...of a possible leak or the source of emissions Installation height depends on the density of the gas being monitored Moreover speed and direction of air flow and relative position to potential leaking points should also be considered IMPORTANT The gas monitor must not be installed on vibrating or heat generating sources 3 3 Wall Mounting If your application is best addressed using a wall mounted ga...

Page 24: ...Installation iTrans Fixed Point Single Dual Gas Monitor 3 2 INDUSTRIAL SCIENTIFIC P N 77023554 Figure 3 1 Mounting the Gas Monitor on a Wall Figure 3 2 Mounting the Gas Monitor on a Column Using U Bolts ...

Page 25: ...ion IMPORTANT DC signal and AC power should not be run in the same conduit NOTE All field wiring colors are arbitrary unless provided by ISC 4 2 Wiring Preparation 1 Collect the appropriate types and lengths of wire For control wire use 18 AWG insulated shielded cable For signal and power wire use three conductor or four conductor for dual channel 18 AWG insulated and shielded cable For digital Mo...

Page 26: ...arm Relay Wiring J1 J5 and J6 To connect the control wires to the three relay terminals on the relay board wire the unit to the connectors shown in Figure 4 2 The low alarm relay is activated when the low alarm threshold is met This is a non latching Normally Open NO contact See Figure 4 1 The high alarm relay is activated when the high alarm threshold is met This is a non latching Normally Open N...

Page 27: ...iTrans Fixed Point Single Dual Gas Monitor System Wiring P N 77023554 INDUSTRIAL SCIENTIFIC 4 3 Figure 4 2 Electronics Module for iTrans Main Unit ...

Page 28: ...nnel 2 4 20 mA output signal GND DC return Figure 4 4 Power and Signal Connector J1 on the NOTE Use supplied green conductor for enclosure ground Public 485 GND is to be used for ModBus digital ground NOTE The is a 3 or 4 wire 4 20 mA device For dual sensor configuration you must have a second 4 20 mA signal wire pulled to the unit NOTE When not using 4 20 mA outputs use the supplied resistors to ...

Page 29: ...troller or remote sensors should be bonded to the enclosure screw located inside the NOTE The 24 V terminal supplies 24 VDC to the sensor for power This terminal should not be connected to the output of a 24 VDC power supply Figure 4 5 Sensor Connector J3 on the NOTE For dual sensor configurations place both of the same colored wires in the appropriate terminal block and firmly tighten NOTE Use 18...

Page 30: ...sor housing These terminal blocks are all tied together and follow the same wiring scheme mentioned above NOTE It is recommended that on board relays should not be used to drive loads directly On board relays should be used to drive a secondary higher power relay which is connected to the control device e g strobe siren exhaust fan etc Figure 4 6 Wiring Diagram for a Single On board Sensor ...

Page 31: ...iTrans Fixed Point Single Dual Gas Monitor System Wiring P N 77023554 INDUSTRIAL SCIENTIFIC 4 7 Figure 4 7 Wiring Diagram for a Remote Sensor Stand Alone ...

Page 32: ... should always be on terminals 2 3 NOTE When the remote sensor is at distances of 200 meters or further and the sensor is not communicating the jumper may need to be moved to terminals 1 2 NOTE If using remote sensors and the does not recognize the sensor upon power up displays a sensor fault check the placement of this jumper If the jumper is on terminals 1 2 move the jumper to terminals 2 3 For ...

Page 33: ... Gas Monitor System Wiring P N 77023554 INDUSTRIAL SCIENTIFIC 4 9 Shielding from either the controller or remote sensors should be bonded to the enclosure screw located inside the Figure 4 9 Wiring Diagram for Dual On board Sensors ...

Page 34: ...System Wiring iTrans Fixed Point Single Dual Gas Monitor 4 10 INDUSTRIAL SCIENTIFIC P N 77023554 Figure 4 10 Wiring Remote Sensors Back to ...

Page 35: ...iTrans Fixed Point Single Dual Gas Monitor System Wiring P N 77023554 INDUSTRIAL SCIENTIFIC 4 11 Figure 4 11 Wiring One Remote Sensor and One On Board Sensor To Other iTrans Unit ...

Page 36: ...System Wiring iTrans Fixed Point Single Dual Gas Monitor 4 12 INDUSTRIAL SCIENTIFIC P N 77023554 Figure 4 11 Wiring One Remote Sensor and One On Board Sensor Continued From Other iTrans Unit ...

Page 37: ...iTrans Fixed Point Single Dual Gas Monitor System Wiring P N 77023554 INDUSTRIAL SCIENTIFIC 4 13 Figure 4 12 Wiring Dual Remote Sensors ...

Page 38: ...us Interface NOTE When connecting the to the 4800 Controller connect 485 B to ModBus pin A on the 4800 Controller and connect 485 A to ModBus pin B on the controller 4 6 2 Setting the ModBus Address on the Located on the back of the electronics module is an 8 position DIP switch This switch bank is used to set the ModBus Slave Address for the unit The address can be set from 1 to 255 Use the DIP s...

Page 39: ...troller PLC or digital system For stand alone sensor heads used in a ModBus network the address is set in the same manner Once the aluminum sensor head is removed with the sensor board the sensor electronics module is exposed On the back of the sensor electronics module is a small 8 position DIP switch The address can be set from 10 to 255 in a similar manner as setting the ModBus address on the e...

Page 40: ...Trans Fixed Point Single Dual Gas Monitor 4 16 INDUSTRIAL SCIENTIFIC P N 77023554 Figure 4 16 Location of Address DIP Switch on Sensor Electronics Module Figure 4 17 Setting the ModBus Address for a Stand Alone Sensor ...

Page 41: ...See Chapter 6 for more information on the ModBus interface Note that DIP switches are pre set at the factory for all dual sensor units 4 7 Wiring Conclusion Once wiring is complete place the electronics module back in the housing by pressing the standoff banana jacks into the mating plugs Be careful not to pinch any of the wiring After the module is in place secure the windowed top back on the hou...

Page 42: ...System Wiring iTrans Fixed Point Single Dual Gas Monitor 4 18 INDUSTRIAL SCIENTIFIC P N 77023554 ...

Page 43: ...ese values are set to zero and must be set following the procedures outlined later in this manual 5 2 Warm up Period During this warm up period the 4 20 mA outputs are limited to 3 mA 16 mA for oxygen After the three minute warm up the unit will enter the Normal Operating Mode If during the warm up period the unit fails a self test the display will show a fault code and the fault relay will be act...

Page 44: ...reading will be displayed on the top row of the LED display If there are two sensors installed then the second sensor s reading will be displayed on the bottom row of the LED display Figure 5 2 Sample Dual Sensor Display As gas concentrations increase the respective channel s readings will respond accordingly If low or high alarm levels are exceeded an alarm indication will appear in the first dig...

Page 45: ...lable functions are listed in later in this chapter and in Chapter 8 Troubleshooting Figure 5 4 Locations of Reed Switches and Push Buttons 5 4 Programming Mode Overview NOTE Zeroing and calibrating the instrument can be accomplished one of two ways via programming mode Zeroing and calibrating as well as other programming options can be entered either from the keypad or non intrusively using the m...

Page 46: ...channel 1 is being programmed and the bottom decimal indicates channel 2 Figure 5 5 Components of the Display Once in programming mode the 4 20 mA outputs are limited to 3 mA 16 mA for Oxygen to keep controllers from being put into alarms When the 4 20 mA outputs are in this limited state the first decimal place on each line of the display will be flashing The will stay in this state for 3 minutes...

Page 47: ...e as follows Sensor Type Zero Calibration Span Gas Value Span Reserve in this order NOTE Please see the end of this chapter and Chapter 8 for a complete list of functions and function codes NOTE Typical zero and calibration times for BBIR sensors is 3 minutes After a calibration the span reserve for the BBIR sensor is not available to the end user 5 5 2 Sensor Type To enter non intrusive operation...

Page 48: ...he 10 second countdown If you do not initiate zeroing during the 10 second countdown the will return to the Normal Operating Mode Figure 5 8 Sample Zeroing Display If you initiate zeroing the status bit will start to flash Once zeroing is complete the unit will return to the Normal Operating Mode NOTE Placing the magnetic wand on CH1 once during the zeroing process will cancel the zero routine and...

Page 49: ... gas the current reading will be displayed on the top line of the LED display To abort calibration at any time place the magnetic wand over CH1 NOTE When calibrating a BBIR sensor the display will not show the actual concentration of gas applied it will display zero Once the calibration is complete the display will switch from zero to the actual concentration of gas applied Figure 5 11 Apply CalGa...

Page 50: ...ic wand over CH1 When the desired value is reached pass the magnetic wand over CH2 to accept and save changes Passing over CH1 or letting the timer count down to zero without saving the new value will take you back into the Programming Mode Figure 5 13 Flashing Status Bit NOTE Span Gas Concentration for combustibles can be set from 0 to 100 LEL For the sake of resolution the Span Gas Concentration...

Page 51: ...g options press the Mode key The access code is Mode Up Down Up Enter Once the proper password has been entered the display will read iNET 0 The iNet setting should remain at 0 to ensure proper function of the onboard relays NOTE Please see the end of this chapter and Chapter 8 for a complete list of functions and function codes 5 6 2 Entering Programming Mode and Selecting a Channel In the Normal...

Page 52: ...arm The high alarm setpoint is designated with an H displayed in the status bit and the current high alarm value displayed next to it To change the high alarm setpoint press the button during the 10 second countdown If you do not press during the 10 second countdown the will return to the Normal Operating Mode If you initiate the high alarm option the status bit will start to flash and the high al...

Page 53: ...e Figure 5 18 Changing the Analog Output Upper Value 5 6 6 Set System Time Minute The system s clock minute setting is designated with a 1 in the status bit and current value next to it To change the minutes press the button during the 10 second countdown If you do not press during the 10 second countdown the will return to the Normal Operating Mode If you initiate the minutes option the status bi...

Page 54: ...tem Time Hour When the desired value is reached press the key If the value is not saved before the time out the will go back to the Programming Mode 5 6 8 Set System Time Date The system s day of the month setting is designated with a d in the status bit and current value next to it To change the day press the button during the 10 second countdown If you do not press during the 10 second countdown...

Page 55: ...is designated with an 8 in the status bit and current value next to it To change the year press the button during the 10 second countdown If you do not press during the 10 second countdown the will return to the Normal Operating Mode If you initiate the year option the status bit will start to flash and the year value can be changed by using the and keys Figure 5 23 Setting System Year When the de...

Page 56: ...n during the 10 second countdown the will return to the Normal Operating Mode If you initiate calibration the status bit will start to flash and the will enter the zeroing process Figure 5 25 Sample Calibration Display NOTE Before the will calibrate the unit will enter the zeroing process Please make sure that you do not apply gas to the instrument while it is zeroing The will automatically zero b...

Page 57: ...liter per minute NOTE Check and verify span setting before starting a calibration 5 6 13 Changing Span Gas Concentration The span option is designated with a flashing S in the status bit with the current span value next to it To change the span value press the key during the 10 second countdown If you do not press the during the 10 second countdown the will return to the Normal Operating Mode If y...

Page 58: ...sed the new span value will not be saved NOTE Span Gas Concentration for combustibles can be set from 0 to 100 LEL For the sake of resolution we suggest that Span Gas Concentration should be set above 20 LEL 5 6 14 Sensor Span Reserve The span reserve option is designated with an r in the status bit The current span reserve is displayed on the top line of the LED display NOTE After a calibration t...

Page 59: ...e 2 2 Date The latest alarm time date 3 3 Month The latest alarm time month 6 6 Date The latest calibration time date 7 7 Month The latest calibration time month 9 9 Year The latest calibration time year 5 8 Special Notes on Using Broadband Infrared BBIR Sensors The broadband infrared BBIR sensor currently used with the gas monitor does not fully support or follow all of the functionality or proce...

Page 60: ...actual concentration of gas applied The typical zero time for the BBIR sensor is 3 minutes The typical calibration time for the BBIR sensor is 3 minutes After a calibration the span reserve for the BBIR sensor is not available to the end user The BBIR sensor s digital address is set at the factory for Channel 1 operation 0x0F or Channel 2 operation 0xF0 This digital address cannot be changed in th...

Page 61: ...odBus Characteristics for the Gas Monitor Characteristic Description Hardware 2 wire mode not 4 wire Baud Rate 9600 Electrical Standard TIA EIA 485 Transmission Mode RTU mode not ASCII Message Coding System 8 bit Start Bits 1 Data Bits 8 LSB sent first Parity Bits 0 Stop Bits 1 Important When commissioning master and slave units on a ModBus network it is critical to ensure that every device on the...

Page 62: ...oking at the clock settings they will be displayed as zero If you set the these values they will not increment Upon initial power up the BBIR sensor does not store or transmit the default values for Low Alarm High Alarm and 4 20 mA range to the unit These values are set to zero and must be set following the procedures outlined in this manual When calibrating the BBIR sensor the display will not sh...

Page 63: ...lue indicating the type of instrument see below The least significant byte LSB holds a value which is the ModBus address of the sensor MSB Instrument type code 01 to FF 03 BBIR broad band infrared 04 TOX toxic 05 OXY oxygen 06 AAW toxic 07 CAT catalytic LSB MODBUS sensor address 01 to F7 1 to 247 40102 W R 0000 to FFFF Gas Reading Holds the gas reading in ppm or percent depending upon the sensor i...

Page 64: ...This can be read by the instrument The least significant byte LSB holds a code which identifies the gas type This can be read by the host MSB Decimal place holder 01 to FF LSB Gas type code 01 to FF 01 CO Carbon Monoxide 02 H2S Hydrogen Sulfide 03 SO2 Sulfur Dioxide 04 NO2 Nitrogen Dioxide 05 Cl2 Chlorine 06 ClO2 Chlorine Dioxide 07 HCN Hydrogen Cyanide 08 PH3 Phosphine 09 H2 Hydrogen 0C NO Nitric...

Page 65: ... defined Bit 5 zero fault Bit 4 calibration fault Bit 3 over range Bit 2 failed sensor Bit 1 high alarm Bit 0 low alarm Examples Missing sensor Bit 11 is set 0800 Power fault and failed sensor Bits 13 and 2 set 2004 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 rep...

Page 66: ...ents the two digit year within the 21st 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 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 Th...

Page 67: ...from 0000 to FFFF 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 6 5 Setting the ModBus Address on the Located on the back of the electronics module is an 8 position DIP switch This switch bank is used to set the ModBus Slave Address for the unit The address can be set from 1 to 255 Use the DIP switch...

Page 68: ...troller PLC or digital system For stand alone sensor heads used in a ModBus network the address is set in the same manner Once the aluminum sensor head is removed with the sensor board the sensor electronics module is exposed On the back of the sensor electronics module is a small 8 position DIP switch The address can be set from 10 to 255 in a similar manner as setting the ModBus address on the e...

Page 69: ...int Single Dual Gas Monitor ModBus Interface P N 77023554 INDUSTRIAL SCIENTIFIC 6 9 Figure 6 3 Location of Address DIP Switch on Sensor Electronics Module Figure 6 4 Setting the ModBus Address for a Stand Alone Sensor ...

Page 70: ...While a detailed discussion of ModBus protocol is beyond the scope of this manual there are a number of up to date resources available on the internet for those wishing to investigate ModBus further The most complete resource is www modbus org 6 8 Termination When putting devices on the ModBus network a terminating resistor may be required for the last device on the network please see www modbus o...

Page 71: ... In recognition of 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 functional tests every 6 months Further Industrial Scientific Corporation recommends prudent testing and or calibration after a gas alarm All calibration service to the sensors should be recorded and access...

Page 72: ...ce screw the sensor cap back on to the housing and secure the set screw Once the new sensor is in place and has time to settle out it should be zeroed and calibrated for accuracy 7 3 Zero and Calibration Zeroing and calibrating the instrument can be accomplished one of two ways These routines can be entered either from the keypad or non intrusively using the magnetic wand See Chapter 5 Operation f...

Page 73: ...isplay does not light up Input voltage is too low Electronics module has failed Check for presence of input voltage Output outside 4 20 mA range Unit in calibration mode Electronics module has failed Exit calibration mode Replace electronics module Output does not change when gas concentration changes Electronics module has failed Replace electronics module Cannot calibrate SPAN Sensor has failed ...

Page 74: ...oes not work Electronics module has failed Reed Switch is damaged Replace electronics module and calibrate Replace the reed switch P appears on the display Open loop on a 4 20 mA channel Place a 100 Ohm load resistor from the mA output pin to ground U appears on the display 4 20 mA signal is in over range Ensure the sensor is working properly and the 4 20 mA is scaled correctly 8 3 Fault Codes Tab...

Page 75: ...t the range of 4 20 mA output 1 1 Minute Set system time minute H h Hour Set system time hour D d Date Set system time date E E Month Set system time month 8 8 Year Set system time year 0 0 Zeroing C C Calibration S S Span Gas Concentration Set span gas concentration R r Sensor Span Reserve Check the span reserve 2 2 Date The latest alarm time date 3 3 Month The latest alarm time month 6 6 Date Th...

Page 76: ...These values are set to zero and must be set following the procedures outlined in this manual When calibrating the BBIR sensor the display will not show the actual concentration of gas applied it will display zero Once the calibration is complete the display will switch from zero to the actual concentration of gas applied The typical zero time for the BBIR sensor is 3 minutes The typical calibrati...

Page 77: ... in material and workmanship for a period of sixty six 66 months from the date of shipment or five 5 years from the date of first use whichever occurs first except where otherwise stated in writing in Industrial Scientific literature accompanying the product 9 2 Limitation of Liability Industrial Scientific makes no other warranties either expressed or implied including but not limited to the warr...

Page 78: ...onsumables or spare parts As with any other sophisticated product it is essential and a condition of Industrial Scientific s warranty that all personnel using the products be fully acquainted with their use capabilities and limitations as set forth in the applicable product literature Buyer acknowledges that it alone has determined the intended purpose and suitability of the goods purchased It is ...

Page 79: ...nitrile butadiene styrene ASCII American Standard Code for Information Interchange BBIR broadband infrared bit binary digit bps bits per second C centigrade CALI calibration CAT catalytic Ch channel CH4 methane chem chemical Cl2 chlorine ClO2 chlorine dioxide CO carbon monoxide CSA Canadian Standards Association DC direct current DCS distributed control system DIP dual in line package DISP display...

Page 80: ...it mA milliampere mm millimeter MSB most significant bit NC normally closed NDIR non dispersive infrared NEMA National Electrical Manufacturers Association NH3 ammonia NO normally open Nitric Oxide NO2 nitrogen dioxide NOR normal mode NRTL nationally recognized testing laboratory O2 oxygen OXY oxygen PH3 phosphene PLC programmable logic controller ppm parts per million REST restart RH relative hum...

Page 81: ...8 0xAA 170 0xCA 202 0xEA 234 0x0B 011 0x2B 043 0x4B 075 0x6B 107 0x8B 139 0xAB 171 0xCB 203 0xEB 235 0x0C 012 0x2C 044 0x4C 076 0x6C 108 0x8C 140 0xAC 172 0xCC 204 0xEC 236 0x0D 013 0x2D 045 0x4D 077 0x6D 109 0x8D 141 0xAD 173 0xCD 205 0xED 237 0x0E 014 0x2E 046 0x4E 078 0x6E 110 0x8E 142 0xAE 174 0xCE 206 0xEE 238 0x0F 015 0x2F 047 0x4F 079 0x6F 111 0x8F 143 0xAF 175 0xCF 207 0xEF 239 0x10 016 0x...

Page 82: ...0011100 220 11011100 29 00011101 93 01011101 157 10011101 221 11011101 30 00011110 94 01011110 158 10011110 222 11011110 31 00011111 95 01011111 159 10011111 223 11011111 32 00100000 96 01100000 160 10100000 224 11100000 33 00100001 97 01100001 161 10100001 225 11100001 34 00100010 98 01100010 162 10100010 226 11100010 35 00100011 99 01100011 163 10100011 227 11100011 36 00100100 100 01100100 164 ...

Page 83: ...iTrans Fixed Point Single Dual Gas Monitor Appendix C P N 77023554 INDUSTRIAL SCIENTIFIC C 1 ORDERING MATRIX Appendix C This appendix provides an ordering matrix for the gas monitor ...

Page 84: ...th Splash Guard 5 Explosion Proof Remote with Splash Guard B Gas sensor 1 F Gas sensor 2 1 Carbon Monoxide CO 1 Carbon Monoxide CO 2 Nitric Oxide NO 2 Nitric Oxide NO 3 Ammonia NH3 3 Ammonia NH3 4 Hydrogen Sulfide H2S 4 Hydrogen Sulfide H2S 5 Sulfur Dioxide SO2 5 Sulfur Dioxide SO2 6 Nitrogen Dioxide NO2 6 Nitrogen Dioxide NO2 7 Chlorine Cl2 7 Chlorine Cl2 8 Chlorine Dioxide ClO2 8 Chlorine Dioxid...

Page 85: ...9 ppm 0 1 ppm 5 ppm 2 0 ppm 4 0 ppm NO2 0 99 9 ppm 0 1 ppm 5 ppm 1 0 ppm 2 0 ppm Cl2 0 99 9 ppm 0 1 ppm 10 ppm 0 5 ppm 1 0 ppm ClO2 0 2 00 ppm 0 01 ppm 0 99 ppm 0 30 ppm 0 50 ppm HCN 0 30 0 ppm 0 1 ppm 10 ppm 5 0 ppm 10 0 ppm PH3 0 1 00 ppm 0 01 ppm 1 0 ppm 0 30 ppm 0 60 ppm CO H2 NULL 0 500 ppm 1 ppm 100 ppm 35 ppm 75 ppm NO 0 999 ppm 1 ppm 25 ppm 25 ppm 50 ppm NH3 0 200 ppm 1 ppm 25 ppm 25 ppm 5...

Page 86: ...Appendix D iTrans Fixed Point Single Dual Gas Monitor D 2 INDUSTRIAL SCIENTIFIC P N 77023554 ...

Page 87: ...iTrans Fixed Point Single Dual Gas Monitor Appendix E P N 77023554 INDUSTRIAL SCIENTIFIC E 1 EC DECLARATION OF CONFORMITY CERTIFICATE Appendix E ...

Page 88: ...Appendix E iTrans Fixed Point Single Dual Gas Monitor E 2 INDUSTRIAL SCIENTIFIC P N 77023554 ...

Page 89: ...ys 1 2 capacity 1 2 wiring J1 J5 J6 4 2 aluminum 1 2 2 1 4 15 6 8 ammonia 1 3 2 2 6 4 B 2 analog signal 5 11 anticipated life 7 1 apply calibration gas 5 7 arrow keys 5 9 5 10 5 11 5 12 5 13 ATEX certified sensors 1 4 atmospheric pressure iii 1 2 7 1 B banana jacks 4 16 baud rate 6 1 BBIR 4 5 5 1 5 7 5 9 5 12 5 16 5 17 6 2 6 3 6 7 7 2 8 4 A 1 address 6 7 calibrating 6 7 calibration time 5 5 6 7 sp...

Page 90: ... EC 1 4 display 1 2 2 3 5 1 5 2 5 4 5 5 5 6 5 7 5 13 5 14 6 2 6 5 6 7 7 2 8 2 8 4 A 1 specifications 1 2 Distributed Control System DCS A 1 driving loads from relays 4 2 dual sensor 4 5 4 16 5 10 6 9 dust ignition proof 1 3 E EC Declaration of Conformity Certificate E 1 electrical risks 1 4 electrochemical diffusion 1 2 electromagnetic compatibility 1 4 electromagnetic interference 4 2 electronics...

Page 91: ... setpoint 5 10 threshold 4 2 low pressure 7 1 Lower Explosive Limit LEL iii 1 2 1 4 2 2 5 7 5 8 5 15 5 16 6 4 7 1 9 1 A 2 B 2 D 1 M magnetic wand 1 1 2 4 5 3 5 4 5 5 5 6 5 7 5 8 7 2 main electronics unit 2 1 maintenance 7 1 routine 7 1 master 6 1 message coding system 6 1 methane A 1 ModBus 6 1 A 1 address switch bank location 4 14 baud rate 1 2 6 1 characteristics 6 1 commands 6 2 configuration 1...

Page 92: ...ii 1 1 1 2 4 6 B 2 contact capacity 1 2 driving loads 4 2 non latching 4 2 user programmable 1 2 remote sensor 4 6 4 8 Remote Terminal Unit RTU 6 1 A 2 remote unit 2 5 replacing sensors 7 2 resistors 4 4 5 1 resolution 5 16 span gas concentration 5 8 restart A 2 routine maintenance 7 1 RS485 1 2 S safety iv sealing device 1 4 secondary higher power relay 4 2 4 6 self test 5 1 sensor s 1 4 4 2 4 5 ...

Page 93: ... 5 4 6 terminating resistor 4 8 6 6 TIA EIA 485 6 1 time setting 5 11 timers 5 4 5 6 5 8 5 13 5 14 5 16 toxic 1 2 2 3 transmission mode 6 1 transmitter 4 1 5 9 B 2 troubleshooting 8 1 U U bolts 3 1 3 2 UL Std No 1203 1 3 UL Std No 1604 1 3 UL Std No 916 1 3 user programmable relays 1 2 V vibrating sources 3 1 W wall mounting 3 1 3 2 warm up period 5 1 warning lights 1 1 warranty 9 1 water 7 2 wind...

Page 94: ...Index iTrans Fixed Point Single Dual Gas Monitor vi INDUSTRIAL SCIENTIFIC P N 77023554 ...

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