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Related Manuals for Detcon CXT-IR
Summary of Contents for Detcon CXT-IR
- Page 1 Model CXT-IR Operator’s Installation 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 This page left intentionally blank Model CXT-IR...
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Page 3: Table Of Contents
Table of Contents Introduction ..............................1 Description ............................1 Modular Design ..........................3 1.2.1 CXT-IR Intelligent Transmitter Module ..................3 1.2.2 Field Replaceable Sensor ........................ 4 CXT Wireless Network ........................5 Battery Pack Options .......................... 5 Detconꞌs Smart Battery Pack ......................5 1.4.1... - Page 4 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 ......................
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Page 5: Introduction
The technique is referred to as non-selective and may be used to monitor most any combustible hydrocarbon gas. Unlike catalytic bead type sensors, Detcon IR sensors are completely resistant to poisoning from corrosive gases and can operate in the absence of an oxygen background. The sensors are characteristically stable and capable of providing reliable performance for periods exceeding 5 years in most industrial environments. -
Page 6: Figure 1 Sensor Cell Construction
The IR sensor generates different signal sensitivity levels for different combustible hydrocarbon target gases. Unless otherwise specified the CXT-IR sensor will be factory calibrated for methane service. If the target hydrocarbon gas is other than methane, then the unit will have to be span calibrated and configured in accordance with this CXT-IR sensor instruction manual. -
Page 7: Modular Design
Model CXT-IR 1.2 Modular Design The Model CXT-IR Sensor Assembly is completely modular and is made up of four parts (Figure 3) 1) CXT-IR Intelligent Transmitter Module (ITM) 2) Plug-in infrared Sensor 3) CXT Series Bottom Housing 4) Splash Guard... -
Page 8: Field Replaceable Sensor
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. -
Page 9: Cxt Wireless Network
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. -
Page 10: Figure 7 Smart Battery Pack
Quad Battery Charger (Optional) Detcon’s Smart Battery Pack can be charged as needed using Detcon’s optional Quad Battery Charger which can charge up to four battery packs at one time. The Quad Battery Charger comes with a plug-in AC/DC adapter that plugs into a standard 100-240VAC outlet for power. -
Page 11: D Cell Lithium Battery Pack
This battery pack provides the unit with 18 volts. The batteries are contained in a battery holder mounted in Detconꞌs aluminum 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. -
Page 12: Tri-C Lithium Battery Pack
Detconꞌs stainless 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. -
Page 13: Installation
2.1 Hazardous Locations Installation Guidelines for Safe Use NOTE: The CXT-IR assembly with strobe is not rated for Class I Division 1 or Class I Zone 1 applications. The following guidelines only apply to a CXT-DM assembly without a strobe. -
Page 14: Sensor Placement
20cm may exceed the MPE limits. Use of any antenna other than the approved antennas will invalidate the certification of the product. 17. The CXT-IR complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. - Page 15 If the sensor cannot be mounted away from these conditions then make sure the Detcon Harsh Location Dust Guard accessory is used. Do not mount in locations where temperatures will exceed the operating temperature limits of the sensor. Where direct sunlight leads to exceeding the high temperature-operating limit, use a sunshade to help reduce temperature.
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Page 16: Sensor Contaminants And Interference
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. Detcon provides a selection of standard junction boxes in both Aluminum and Stainless Steel. -
Page 17: Figure 12 Cxt-Ir Sensor With D Or Smart Battery Pack Mounting Dimensions
0.5". 23" Typ. 5.5" NPT Port " mounting holes ITM Assembly Splash Guard Adapter Splash Guard 9.5" 7.45" Figure 12 CXT-IR Sensor with D or Smart Battery Pack Mounting Dimensions CXT-IR Instruction Manual Rev. 2.1 Page 13 of 48... -
Page 18: Figure 13 Cxt-Ir Sensor With C-Cell Batteries
3.45" Mini Condulet with Ø0.4 X 0.475" Battery Holder and mounting Batteries holes 6-32 tapped ground point ITM Assembly Splash Guard Adapter Splash Guard Figure 13 CXT-IR Sensor with C-Cell Batteries CXT-IR Instruction Manual Rev. 2.1 Page 14 of 48... -
Page 19: Electrical Installation
NOTE: The Detcon Warranty does not cover water damage resulting from water leaking into the enclosure. NOTE: Any unused ports should be blocked with suitable ¾” male NPT plugs. Detcon supplies one ¾” NPT male plug with each J-box enclosure. If connections are other than ¾” NPT, use an appropriate male plug of like construction material. -
Page 20: Figure 14 Terminal Interconnect For Smart Battery Pack
NOTE: A 6-32 or 8-32 threaded exterior ground point is provided on most junction boxes for an external ground. If the Sensor Assembly is not mechanically grounded, an external ground strap must be used to ensure that the sensor is electrically grounded. CXT-IR Instruction Manual Rev. 2.1 Page 16 of 48... -
Page 21: Initial Start Up
If the unit is equipped with the optional power switch, power is applied by pushing the switch. Observe the following normal conditions: 1. Upon power up, the sensor will momentarily display SY, scroll DETCON CXT-IR and will then display the current reading for approximately 5 seconds. A temporary upscale reading may occur as the sensor stabilizes. -
Page 22: Operation
3 to 4 seconds the sensor will revert to the menu scroll. If the sensor is in Bump Test mode, the display will remain active. CXT-IR Instruction Manual Rev. 2.1 Page 18 of 48... -
Page 23: Operator Interface
Last Cal ## Days Sensor Life ###% Temperature ##C Alarm 1 Alarm 2 Set Gas Type Set Autospan Level Set Gas Factor Bump Test Restore Defaults Set RF Channel Alarm Settings Set Modbus™ ID CXT-IR Instruction Manual Rev. 2.1 Page 19 of 48... -
Page 24: Normal Operation
“” prompt will not appear until the fault(s) have been displayed. When the ITM enters Calibration Mode the display will scroll “Pgm1=Zero . . . Pgm2=Span” twice before returning to Normal Mode (about 5 seconds). CXT-IR Instruction Manual Rev. 2.1 Page 20 of 48... -
Page 25: Autozero
613-120000-700) -OR- • Detcon Threaded Calibration Adapter (PN 943-000006-132) • Detcon Zero Air cal gas (PN 942-001123-000) (or use ambient air if no target gas is present) • Detcon Nitrogen 99.99% (PN 942-640023-100) NOTE: The zero gas source may be zero air or N for toxic sensors, but must be pure N (99.99%) for O... - Page 26 Detcon Threaded Calibration Adapter (PN 943-000006-132) • Detcon Span Gas. Recommended span gas is 50% of range with target gas. Other suitable span gas sources containing the target gas in air or N2 balance are acceptable. NOTE 1: Contact Detcon for Ordering Information on Span Gas cylinders.
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Page 27: Program Mode
From Normal Operation, enter Program Mode by holding the magnet over PGM2 for 3 seconds. Note, the “” prompt will show that the magnetic switch is activated during the 3 second hold period. If the sensor is CXT-IR Instruction Manual Rev. 2.1... -
Page 28: View Sensor Status
Serial Number The menu item appears as: “Serial Number ##.##.##”. This is the serial number for the radio embedded in the CXT-DM. RF Channel The menu item appears as: “RF Channel ##” CXT-IR Instruction Manual Rev. 2.1 Page 24 of 48... - Page 29 PGM1 or PGM2, or c) return to normal operation via automatic timeout of about 15 seconds (the display will scroll View Sensor Status four times and then return to normal operation). CXT-IR Instruction Manual Rev. 2.1 Page 25 of 48...
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Page 30: Set Gas Type
15 seconds (the display will scroll Set AutoSpan Level 4 times and then return to normal operation). 3.4.5 Set Gas Factor Because of the CXT-IR sensorꞌs almost universal response to combustible hydrocarbon gases, the CXT-IR sensor can be configured and calibrated to detect a variety of combustible gases. The detected gas is referred to as the "target gas"... -
Page 31: Table 1 Gas Factors
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 Set Gas Factor four times and then return to normal operation). CXT-IR Instruction Manual Rev. 2.1... -
Page 32: Bump Test
CAUTION 3.4.8 Set RF Channel The CXT-IR sensor communicates wirelessly and can be set to use unique wireless radio channel. Set RF Channel is used to set the RF radio channel. It is adjustable from 0 to 15. The menu item appears as: Set RF Channel. -
Page 33: Alarm Settings
(typically 4 repeated text scrolls), the ITM will automatically revert to Normal Operation. 3.4.10 Set Modbus ID Detcon CXT sensor can be polled serially via Modbus™ RTU. Refer to Section 4.0 for details on using the Modbus™ output feature. -
Page 34: Modbus™ Tm Communications
CXT. By default this is turned off since it can cause issues with some controllers that do not process Modbus™ exceptions (See Section 4.2.2.4 Register – Control). The following exception codes are supported and returned when Modbus™ exceptions are enabled: CXT-IR Instruction Manual Rev. 2.1 Page 30 of 48... -
Page 35: Modbus™ Broadcast Requests
The registers are divided into two sections, one for the CXT sensor and the other for the CXT transceiver. For a more detailed description of the Register Map please contact Detcon. CXT-IR Instruction Manual Rev. -
Page 36: Table 3 Cxt-Ir Register Map
Model CXT-IR Table 3 CXT-IR Register Map Offset Name Comment 0000 CXT-IR-100 Device Type = 36 0001 Range Detectable Range 0002 Reading Current Gas Reading 0003 Calibration Level Auto Span Level 0004 Life Sensor Life 0005 Sensor Faults Fault bits... -
Page 37: Cxt Sensor Registers
– Processor Fault Bit 5 – Memory Fault Bit 4 – Reserved Bit 3 – Reserved Bit 2 – Temperature Fault Bit 1 – Auto Span Fault Bit 0 – Global Fault CXT-IR Instruction Manual Rev. 2.1 Page 33 of 48... -
Page 38: Cxt Transceiver Registers
4.2.2 CXT Transceiver Registers 4.2.2.1 Battery Info – Multiple Registers If a Detcon smart battery pack is connected to the CXT, there are five registers associated with information about that battery. The CXT utilizes the I C interface to read battery status and only one Detcon battery pack can be read per CXT. - Page 39 0 upon power up or a microcontroller reset. The first two registers 8208 and 8209 are internally combined into a single 32 bit register and incremented each second. The last register 8210 maintains the millisecond count and will count from 0 to 999 and start over again. CXT-IR Instruction Manual Rev. 2.1 Page 35 of 48...
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Page 40: Service And Maintenance
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 display. This fault will appear when the battery voltage drops below 7.5 volts. -
Page 41: Figure 19 Battery Orientation Diagram
5. The orientation of batteries is marked on the inside of the cover and the holder. Remove the batteries from the battery holder. 6. Replace the batteries with the same type (Detcon P/N 360-TL5930-000). Pay close attention to the orientation of the batteries. Installing the batteries incorrectly can cause damage to the batteries, the battery holder and the unit (refer to Figure 19). -
Page 42: Units With Tri-'C' Sized Lithium Battery Holder
4. The orientation of batteries is marked on the inside of the cover and the holder. Remove the batteries from the battery holder. 5. Replace the batteries with the same type (Detcon PN 360-026500-000). 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. -
Page 43: Replacement Of Plug-In Sensor
NOTE: It is not necessary to remove power while changing the plug-in combustible gas sensor in order to maintain area classification, since it is intrinsically safe. NOTE: Only replace the plug-in sensor with an authorized CXT-IR family of gas sensors. Locking... -
Page 44: Replacement Of Itm - Aluminum Junction Box
ITM and press the sensor in firmly to make proper connection. 6. Thread the Splashguard Adapter Assembly onto the new ITM until snug, tighten the locking cap head screw and reinstall Splash Guard. CXT-IR Instruction Manual Rev. 2.1 Page 40 of 48... -
Page 45: Troubleshooting Guide
Probable Cause: The sensor optics have become too dirty to support functionality. • Replace the Sensor Cell with a known good Sensor Cell. Under-Range problems Probable Cause: Sensor baseline drifted lower, interference gases, CXT-IR Instruction Manual Rev. 2.1 Page 41 of 48... - Page 46 • Check for obstructions affecting cal gas hitting sensor face (including being wet, blocked, or corroded). Sensor assemblies use CXT-IR series splashguard adapter assembly with integral filter. Clean or replace if necessary. • Replace the plug-in combustible sensor.
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Page 47: Customer Support And Service Policy
Warranty Notice Detcon Inc. warrants the Model CXT-IR gas sensor to be free from defects in workmanship of material under normal use and service for one year from the date of shipment on the transmitter electronics. See Warranty details in Section 8 CXT-IR Sensor Warranty. -
Page 48: Cxt-Ir Sensor Warranty
Defective or damaged equipment must be shipped to the Detcon Inc. factory or representative from which the original shipment was made. In all cases, this warranty is limited to the cost of the equipment supplied by Detcon Inc. The customer will assume all liability for the misuse of this equipment by its employees or other contracted personnel. -
Page 49: Appendix
Operating Pressure: Ambient ± 10% Air Velocity: 0-5 meters/second 9.1.3 Electrical Specifications Input Voltage: 7.2-30VDC Power Consumption: 25mW (Low Power Mode) 100mW (Typical) 5W (With Strobe Active) RFI/EMI Protection: Complies with EN61326 CXT-IR Instruction Manual Rev. 2.1 Page 45 of 48... -
Page 50: Mechanical Specifications (Itm Only)
18 gauge wire leads - 5.5” long with RF Cable terminated at SMA 9.2 Spare Parts, Sensor Accessories, Calibration Equipment Table 4 Spare Parts, Sensor Accessories, and Calibration Equipment Part Number Spare Parts 92C-IR0200-000 CXT-IR Intelligent Transmitter Module 371-IR1II1-000 Replacement Plug-in sensor 500-005180-100 CXT Smart Battery Terminal Board 976-0BP303-012... -
Page 51: Revision Log
Added Section 2.1, Updated Approvals Label 09/08/14 Section 2.1, Updated Approvals Label 11/27/14 Added CXT w/Strobe 12/11/15 Updated to add D Cell, remove Group B gases 06/12/18 Updated Section 2.5 Conduit Seal, Added Battery Cautions CXT-IR Instruction Manual Rev. 2.1 Page 47 of 48... -
Page 52: Shipping Address: 4055 Technology Forest, Suite 100, The Woodlands, Texas 77381
This page left intentionally blank Shipping Address: 4055 Technology Forest, Suite 100, The Woodlands, Texas 77381 Mailing Address: P.O. Box 8067, The Woodlands Texas 77387-8067 www.detcon.com Phone: 888.367.4286, 281.367.4100 • Fax: 281.292.2860 • • CXT-IR Instruction Manual Rev. 2.1 Page 48 of 48...