Detcon CXT-IR Page 8 Operator'S Installation And Instruction Manual Download | Manualshive

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Model CXT-IR

CXT-IR Instruction Manual

Rev. 2.1

Page 4 of 48

Figure 4 ITM Circuit Functional Block Diagram

Program Switch #1

LED Display

Program Switch #2

Housing Bottom
Locking Set-Screw

detcon inc.

LEL Sensor

detcon inc.

MODEL

CXT- IR

Figure 5 Sensor Assembly Front View

1.2.2

Field Replaceable Sensor

Detconꞌs infrared gas sensors are field proven, plug-in sensors with over-sized gold-plated connections that
eliminate corrosion problems. The sensor can be accessed and replaced in the field easily by releasing the locking
screw and unthreading the splashguard adapter assembly.

NOTE

Detconꞌs combustible sensors have a long shelf life and are supported by an industry-leading
warranty.

Figure 6 Plug-in Sensor

I/O

Circuit

Protection

Accessory
connections

Antenna

Power In

Wireless

Power

supplies

Micro-

Processor

Intrinsically

Safe Barrier

Plug-In

Sensor

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10
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Summary of Contents for CXT-IR

Page 1: ...stallation and Instruction Manual Covers all Model CXT IR Sensors DETCON Inc 4055 Technology Forest Blvd Suite 100 The Woodlands Texas 77381 Ph 281 367 4100 Fax 281 298 2868 www detcon com June 13 2018 Document 3822 Revision 2 1 ...

Page 2: ...Model CXT IR Model CXT IR ii This page left intentionally blank ...

Page 3: ...ration Mode 20 3 3 1 AutoZero 21 3 3 2 AutoSpan 21 3 4 Program Mode 23 3 4 1 Navigating Program Mode 23 3 4 2 View Sensor Status 24 3 4 3 Set Gas Type 26 3 4 4 Set AutoSpan Level 26 3 4 5 Set Gas Factor 26 3 4 6 Bump Test 28 3 4 7 Restore Defaults 28 3 4 8 Set RF Channel 28 3 4 9 Alarm Settings 29 3 4 10 Set Modbus ID 29 3 5 Fault Diagnostic Failsafe Feature 29 Modbus TM Communications 30 4 1 Gene...

Page 4: ...re 9 D Cell Lithium Battery Pack 7 Figure 10 Tri C Lithium Battery Holder 8 Figure 11 Approval Labels 9 Figure 12 CXT IR Sensor with D or Smart Battery Pack Mounting Dimensions 13 Figure 13 CXT IR Sensor with C Cell Batteries 14 Figure 14 Terminal Interconnect for Smart Battery Pack 16 Figure 15 Magnetic Programming Tool 18 Figure 16 Magnetic Programming Switches 18 Figure 17 Menu Flow Chart 20 Fi...

Page 5: ...ts of Figure 1 one infrared lamp source two pyroelectric detectors active and reference and one optical gas sample chamber The lamp source produces infrared radiation which interacts with the target gas as it is reflected through the optical gas sample chamber The infrared radiation contacts each of the two pyroelectric detectors at the completion of the optical path The active pyroelectric detect...

Page 6: ...mpute the target gas concentration By using the ratio of the active reference signal outputs measurement drift caused by the changes in the intensity of the IR lamp source or changes in the optical path s reflectivity is prevented Figure 2 Figure 2 Principle of Operation Performance Characteristics The IR sensor maintains strong sensitivity to most all combustible hydrocarbon gases within the LEL ...

Page 7: ...l metal components are constructed from electro polished 316 Stainless Steel in order to maximize corrosion resistance in harsh environments 1 2 1 CXT IR Intelligent Transmitter Module The Intelligent Transmitter Module ITM is a fully encapsulated microprocessor based package that accepts a plug in field replaceable combustible gas sensor Circuit functions include Figure 4 extensive I O circuit pr...

Page 8: ...ors are field proven plug in sensors with over sized gold plated connections that eliminate corrosion problems The sensor can be accessed and replaced in the field easily by releasing the locking screw and unthreading the splashguard adapter assembly NOTE Detconꞌs combustible sensors have a long shelf life and are supported by an industry leading warranty Figure 6 Plug in Sensor I O Circuit Protec...

Page 9: ...er and alarm station transceivers CXT IR transceivers can be deployed with less concern about physical location 1 4 Battery Pack Options The CXT IR can be powered by a battery pack that enables the IR to be remotely mounted without the need for external cabling Detcon offers several battery pack options that are factory installed Contact Detcon for more information on these options 1 4 1 Detconꞌs ...

Page 10: ...dapter plugs into the DC power jack of the charger providing 24VDC The Quad Battery Charger has four charging ports each with 8 pin Beau connectors for battery pack connection The ports and connectors are keyed to prevent incorrect positioning and connection Each port has its own FAULT LED indicator and CHARGE LED indicator and will display either a red light or green light depending on the status...

Page 11: ...m explosion proof condulet The CXT DM sensors will operate up to 9 months before battery replacement is needed The battery Pack and Terminal Board are housed in Detcon s Aluminum Condulet to protect them from exposure to outside elements and still provide Class I Div 1 C and D approvals Figure 9 D Cell Lithium Battery Pack CAUTION Warning Explosion Hazard Batteries must only be changed in an area ...

Page 12: ...steel explosion proof mini condulet This option offers a smaller foot print but provides less run time than Detcon s Smart Battery Pack The CXT IR sensors can operate for up to 60 days before battery replacement is needed The addition of Detconꞌs Stainless Steel Mini Condulet provides Class I Div 1 Group C and D ratings Figure 10 Tri C Lithium Battery Holder CAUTION Warning Explosion Hazard Batter...

Page 13: ...he junction box cover while in the classified are unless it is conformed the there is no explosive gas levels in the area 3 A good ground connection should be verified between the sensor s metal enclosure and the junction box If a good ground connection is not made the sensor can be grounded to the junction box using the sensor s external ground lug Verify a good ground connection between the junc...

Page 14: ...le Lithium batteries 15 The CXT IR contains FCC ID U90 RF200 and IC 7084A RF200 16 The CXT IR complies with FCC Maximum Permissible Exposure MPE requirements when used with an approved antenna and the antenna is at least 20cm away from the user Use of the product closer than 20cm may exceed the MPE limits Use of any antenna other than the approved antennas will invalidate the certification of the ...

Page 15: ...to contaminants that may foul the sensor prematurely NOTE In all installations the gas sensor should point straight down refer to Figure 12 Improper sensor orientation may result in false readings and permanent sensor damage Placement of RF Antenna Placement of the sensor should have consideration made for line of sight RF transmissions The devices should be placed in a reasonable proximity to oth...

Page 16: ...equire more frequent calibration checks to ensure safe system performance For the CXT IR combustible gas sensors there are no known cross interference gases that are not combustible hydrocarbon gases 2 4 Sensor Mounting The CXT IR should be vertically oriented so that the sensor points straight downward Figure 12 The explosion proof enclosure or junction box is typically mounted on a wall or pole ...

Page 17: ...int 7 45 3 4 NPT Port 9 5 Wall or other mounting surface Splash Guard Adapter Splash Guard ITM Assembly 23 Typ Use spacers to move sensor assembly away from wall at least 0 5 Spacer 1 4 mounting holes Spacer 5 5 Figure 12 CXT IR Sensor with D or Smart Battery Pack Mounting Dimensions ...

Page 18: ...2 1 Page 14 of 48 6 32 tapped ground point 4 1 3 4 NPT Port 3 64 Ø0 4 X 0 475 mounting holes Splash Guard Adapter Splash Guard ITM Assembly 3 45 22 Typ Mini Condulet with Battery Holder and Batteries Figure 13 CXT IR Sensor with C Cell Batteries ...

Page 19: ...e sensor until all wiring is properly terminated 2 6 Initial Start Up NOTE For products utilizing the aluminum junction box option the conduit seal shall be placed at the entry to the junction box For products utilizing the stainless steel junction box option the conduit seal shall be placed within 18 of the enclosure Crouse Hinds type EYS2 EYD2 or equivalent are suitable for this purpose 2 5 1 Ap...

Page 20: ...V Power To External Return 24VDC Figure 14 Terminal Interconnect for Smart Battery Pack 4 Replace the junction box cover after Initial Start Up Ensure that the cover is screwed down completely and that the Allen Head screw is tightened down to secure the cover in place NOTE A 6 32 or 8 32 threaded exterior ground point is provided on most junction boxes for an external ground If the Sensor Assembl...

Page 21: ...arget gas Material Requirements Detcon PN 613 120000 700 700 Series Splash Guard with integral Cal Port and Calibration Wind Guard P N 943 000000 000 OR Detcon PN 943 000006 132 Threaded Calibration Adapter OR Detcon P N 943 01747 T05 Teflon Calibration Adapter for highly reactive gases Detcon Span Gas 50 of range target gas in balance N2 or Air at fixed flow rate between 200 500cc min NOTE Wind G...

Page 22: ...or 3 second hold the programming magnet is held in place over the switch location for three seconds For 10 second hold the programming magnet is held in place over the switch location for 10 seconds The 3 and 10 second holds are generally used to enter calibration program menus and save new data The momentary contact is generally used to move between menu items and to modify set point values Arrow...

Page 23: ...u items that include sub menus normal operation calibration mode and program mode Normal Operation Concentration Reading is displayed once every 10 seconds Calibration Mode AutoZero AutoSpan Program Mode View Sensor Status Mp App CP App Rf App RfSw Modbus ID Serial Number RF Channel Network ID Sensor Sn Range Autospan Level Last Cal Days Sensor Life Temperature C Alarm 1 Alarm 2 Set Gas Type Set A...

Page 24: ...inc inc inc inc PGM2 S PGM1 2 3 PGM1 S Alarm 2 Level Y N Alarm 2 Ascending Y N Alarm 2 Latching Y N Alarm 2 Energized dec AutoTime out PGM1 2 3 PGM1 2 M AutoTime out PGM1 2 3 PGM1 2 M AutoTime out PGM1 2 3 PGM1 2 M inc inc inc Auto Time Out inc PGM2 S PGM1 2 3 PGM1 S PGM1 2 3 PGM1 2 M Set Modbus ID dec Figure 17 Menu Flow Chart 3 2 Normal Operation In normal operation the ITM Display will be blank...

Page 25: ...contain no target gas content then it can be used for zero calibration If a zero gas cal cylinder is going to be used attach the calibration adapter and set flow rate of 200 500cc min 500cc min is the recommended flow rate and let sensor purge for 1 to 2 minutes before executing the AutoZero b From normal operation enter calibration mode by holding the programming magnet over PGM1 for 3 seconds Th...

Page 26: ...the calibration gas level setting matches the calibration span gas concentration is required before executing AutoSpan calibration These two numbers must be equal AutoSpan consists of entering calibration mode and following the menu displayed instructions The display will ask for the application of span gas in a specific concentration The applied gas concentration must be equal to the calibration ...

Page 27: ... and will revert to normal operation If the sensor fails to clear to less than 10 in less than 5 minutes a Clearing Fault will be reported twice and the ITM will return to normal operation aborting the AutoSpan sequence The ITM will continue to report a Clearing Fault until a successful calibration is completed f AutoSpan calibration is complete NOTE 1 If the sensor fails the minimum signal change...

Page 28: ... magnet activity while the menu item text is scrolling typically 4 repeated text scrolls the ITM will automatically revert to Normal Operation 3 4 2 View Sensor Status View Sensor Status displays all current configuration and operational parameters including sensor type software version number detection range AutoSpan level days since last AutoSpan estimated remaining sensor life gas factor gas ty...

Page 29: ...item appears as Alarm1 Level Ascending or Decending Latching or NonLatching Energized or DeEnergized Alarm2 The menu item appears as Alarm2 Level Ascending or Decending Latching or NonLatching Energized or DeEnergized When the status list sequence is complete the ITM will revert to the View Sensor Status text scroll The user can either a review list again by executing another 3 to 4 second hold b ...

Page 30: ...or This level is adjustable from 5 to 95 of range The current setting can be viewed in View Program Status The menu item appears as Set AutoSpan Level From the Set AutoSpan Level text scroll hold the magnet over PGM1 or PGM2 until the arrow prompt appears and continue to hold the magnet in place for an additional 3 4 seconds until the display starts to scroll Set Level The display will switch to X...

Page 31: ...ane and the cal gas was methane the correct Gas Factor would be calculated and entered as 0 5 x 0 77 0 5 x 0 77 1 0 0 77 Table 1 Gas Factors Gas Factor Gas Factor Gas Factor Acetic Acid 2 00 Decane 1 53 Naphthalene Acetone 1 21 Ethyl Alcohol 0 35 n Nonane 1 53 Benzene 1 00 Ethane 0 38 n Octane 1 34 1 3 Butadiene 1 80 Ethyl Benzene 1 07 n Pentane 0 77 Butane 0 77 Ethylene 2 39 Propane 0 63 Iso Buta...

Page 32: ... to hold the magnet in place for an additional 3 to 4 seconds until the display starts to scroll Defaults Restored The display will then revert to Restore Defaults text scroll Move to another menu item by executing a momentary hold or return to normal operation via automatic timeout of about 15 seconds the display will scroll Restore Defaults four times and then return to normal operation CAUTION ...

Page 33: ...us ID text scroll hold the programming magnet over PGM1 or PGM2 until the prompt appears and continue to hold the magnet in place for an additional 3 4 seconds until the display starts to scroll Set ID The display will then switch to XX where XX is the current ID address Swipe the magnet momentarily over PGM2 to increase or PGM1 to decrease the hexadecimal number until the desired ID is displayed ...

Page 34: ...dbus address function code data and CRC Address Field Function Code Data CRC Figure 18 Modbus Frame Format The Modbus ID Field is the unique Modbus address of each device on the network The Function Code is the function to be performed The Data contains read or write data and is formatted according to the function being performed The CRC Cyclic Redundancy Code is used to detect errors in the frame...

Page 35: ...for a period of time before sending out the next request This allows all slave devices to process the command before the next request is received This is defined as the turnaround delay This turnaround delay should be approximately 150 milliseconds for broadcast requests sent to the CXT Controllers in general can meet this timing because it takes longer than this to generate the next request so it...

Page 36: ... 0022 Reserved R W NOT USED 0023 Sensor Controller Version R Year Week 0024 Reserved R 0025 Reserved R 0026 Reserved R 0027 Wireless Controller Version R Major Minor 0028 Reserved R 0029 Radio Firmware Version R 00 Major 0030 Radio Firmware Version R Minor Build 0031 Radio Software Version R Major Minor 0032 Wireless ID High R 00 XX 0033 Wireless ID Low R XX XX 0034 RF Channel R Wireless RF Channe...

Page 37: ... 4 2 1 CXT Sensor Registers 4 2 1 1 Sensor Faults Register 0005 The sensor fault status register consists of High and Low Status Bits These bits are set reset as faults occur or are cleared Each bit has a particular meaning Register High Byte Low Byte 0005 Status Bits Status Bits Bits read as 0 are FALSE bits read as 1 are TRUE Status Bits High Byte Bit 15 Reserved Bit 14 Calibration Mode Bit 13 R...

Page 38: ... minutes is an unsigned value between 0 and 65535 Both readings are generally necessary to provide appropriate feedback to the user Life in minutes is the best for determining when to change the battery For example if the user wanted to be notified a day before the battery needed to be changed the user could set a threshold in the controller to be notified of low battery after 1440 minutes 1 day S...

Page 39: ...rst then modify the bits needed and written back The default state of the register is 0 All reserved bits should always be set to a 0 when writing The listing below shows the bit assignments Bit 15 Reserved set to 0 Bit 14 Reserved set to 0 Bit 13 12 Reserved set to 0 Bit 11 Modbus Exceptions Enabled Bit 10 08 Reserved set to 0 Bit 07 Reset the microcontroller and wireless radio Bit 06 Reset the m...

Page 40: ...mulating moisture due to day night humidity changes This packet provides a critical function and should be replaced annually Detcon s PN is 960 202200 000 5 1 Replacement of the Batteries Battery Pack 5 1 1 Units with 12V Smart Battery Pack The CXT IR Sensor incorporates a Low battery fault message which will appear as an alternating display between the current gas reading and VOLT on the sensor d...

Page 41: ...atteries incorrectly can cause damage to the batteries the battery holder and the unit refer to Figure 19 It is permissible to use only Tadiran Model TL 5930 batteries Do NOT use regular ꞌDꞌ size batteries as this may cause damage to the sensor assembly 7 Reinstall the bottom cover of the battery housing and tighten the four 4 40 philips head screws to reassemble the battery holder 8 Swing the lid...

Page 42: ...0 It is permissible to use only Tadiran Model TL 5920 batteries Do NOT use regular ꞌCꞌ size batteries as this may cause damage to the sensor assembly 6 All three batteries must be replaced at the same time 7 Pay attention to the orientation of the batteries when installing batteries in the Battery Holder The negative minus leads of the battery should connect with the negative minus leads of the ba...

Page 43: ...locking setscrew that locks the ITM and splashguard adapter assembly together One turn only Do not remove setscrew completely 2 Remove the splashguard 3 Unthread and remove the splashguard adapter assembly from the ITM 4 Gently pull the plug in sensor out of the ITM Verify the gas type and range of the new sensor cell is correct 5 Orient the new plug in sensor so that it matches with the female co...

Page 44: ... assembly wires to the terminal board inside the Junction Box 11 Re connect the RF cable to the antenna cable 12 Install the battery pack 13 Check and or perform Zero Calibration and Span Calibration in accordance with Section 3 3 5 4 Replacement of ITM Stainless Steel Mini Condulet 1 Remove the cover of the battery holder and remove the batteries Remove the battery holder from the j box by removi...

Page 45: ...Mode about 5 seconds 10 AutoZero and 3 3 2 AutoSpan Troubleshooting Guide If the ITM detects any functional errors the ITM will display the fault If the sensor is experiencing a fault condition a momentary swipe of the magnet will cause the ITM to scroll the fault condition s across the display before the or prompt will appear The Display Error Codes are Auto Span Fault Temperature Fault Memory Fa...

Page 46: ... not removed at appropriate time problems with cal gas and delivery background of target gas The sensor must recover to 10 of range in 5 min after Span calibration is complete Use bottled air zero air or N2 if there is a known continuous background level Check validity of span gas using pull tube or other means check MFG date on cal gas cylinder Use proper cal gas regulators and tubing for highly ...

Page 47: ... Technology Forest Blvd Suite 100 The Woodlands Texas 77381 Mailing Address P O Box 8067 The Woodlands Texas 77387 8067 Phone 888 367 4286 or 281 367 4100 Fax 281 292 2860 www detcon com service detcon com sales detcon com All Technical Service and Repair activities should be handled by the Detcon Service Department by phone fax or email through the contact information given above RMA numbers shou...

Page 48: ...of the product CXT IR Sensor Warranty Detcon Inc as the manufacturer warrants under intended normal use each new CXT IR sensor to be free from defects in material and workmanship for a period of one year from the date of shipment to the original purchaser Should the sensor fail to perform in accordance with published specifications within the warranty period return to Detcon Inc for necessary repa...

Page 49: ... CXT IR Canada and US NRTL Class I Division 1 Groups C and D Tamb 40 C to 50 C Class I Zone 1 Group IIB ATEX IECEx ExdibIIBT4Gb Tamb 40 Cto 50 C SIRA14ATEX1034X EN60079 0 2012 EN60079 1 2007 EN60079 11 2012 Warranty Electronics 1 year 9 1 2 Environmental Specifications Operating Temperature 40 C to 50 C typical Storage Temperature 35 C to 55 C typical Operating Humidity 10 95 RH Continuous Duty 0 ...

Page 50: ...mAh Rechargeable 976 0BP303 290 Plug In Battery Pack 12V 2900mAh Rechargeable 360 0265500 000 Lithium Primary 3 6V C size battery Not rechargeable 360 TL5930 000 Battery Lithium 3 6V D size Not rechargeable 960 202200 000 Condensation prevention packet For condulet replace annually 602 003870 000 Tri C Size Battery Holder for Lithium 3 6V non rechargeable C Size 602 004402 000 D Sized Battery Hold...

Page 51: ...ed title page updated spare parts list drawings LU 1 3 07 19 13 Updates for battery and sensor cell faults BM 1 4 01 20 14 Add Calibration Wind Guard to Calibration Procedures BM 1 5 02 10 14 Add detail to battery installation BM 1 6 02 10 14 Added Section 2 1 Updated Approvals Label BM 1 7 09 08 14 Section 2 1 Updated Approvals Label BM 1 8 11 27 14 Added CXT w Strobe LU 2 0 12 11 15 Updated to a...

Page 52: ...Page 48 of 48 Shipping Address 4055 Technology Forest Suite 100 The Woodlands Texas 77381 Mailing Address P O Box 8067 The Woodlands Texas 77387 8067 Phone 888 367 4286 281 367 4100 Fax 281 292 2860 www detcon com This page left intentionally blank ...

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