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Teledyne Detcon CX-DM Instruction Manual

Toxic gas sensors, o2 deficiency sensors
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Instruction Manual
Model CX-DM
CX-DM Toxic Gas Sensors
CX-DM O2 Deficiency Sensors
This manual covers all CX-DM Sensors
TELEDYNE DETCON, Inc.
14880 Skinner Road, Cypress, Texas 77429
Phone 713.559.9200
www.teledynegasandflamedetection.com
March 15, 2022 • Document #4429 • Revision 1.8
Use and Disclosure of Data
Information contained herein is classified as
EAR99 under the U.S. Export Administration
Regulations. Export, reexport or diversion
contrary to U.S. law is prohibited.

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Summary of Contents for Teledyne Detcon CX-DM

  • Page 1 Instruction Manual Model CX-DM CX-DM Toxic Gas Sensors CX-DM O2 Deficiency Sensors This manual covers all CX-DM Sensors TELEDYNE DETCON, Inc. 14880 Skinner Road, Cypress, Texas 77429 Phone 713.559.9200 www.teledynegasandflamedetection.com Use and Disclosure of Data Information contained herein is classified as EAR99 under the U.S.
  • Page 2 EAR99 Technology Subject to Restrictions Contained on the Cover Page This page left intentionally blank CX-DM Instruction Manual...
  • Page 3 Table of Contents Introduction ............................1 Description............................. 1 Modular Mechanical Design ......................1 1.2.1 CX-DM Intelligent Transmitter Module ..................2 1.2.2 Field Replaceable Sensor ......................2 Installation ............................. 3 Hazardous Locations Installation Guidelines for Safe Use .............. 3 Sensor Placement ........................... 3 Sensor Contaminants and Interference ....................
  • Page 4 Figure 3 Sensor Assembly Breakaway ......................2 Figure 4 Functional Block Diagram ........................ 2 Figure 5 Plug-in Sensor ..........................2 Figure 6 CX-DM Sensor with Mini-Condulet ....................5 Figure 7 Typical Installation ........................... 6 Figure 8 Sensor Wire Connections ........................7 Figure 9 Terminal Interconnect ........................
  • Page 5 Figure 2 Construction of Galvanic Cell 1.2 Modular Mechanical Design The Model CX-DM Sensor Assembly is completely modular and is made up of four parts (Figure 3). 1) CXT-DM Intelligent Transmitter Module (ITM) 2) Plug-in Electrochemical Sensor (varies by gas type and range) 3) CXT Series Bottom Housing 4) Splash Guard.
  • Page 6 The sensor can be easily accessed and replaced in the field by releasing the locking screw and unthreading the splashguard adapter assembly. Teledyne Detconꞌs toxic sensors have a long shelf life and supported by an industry-leading warranty.
  • Page 7 9. These sensors have a maximum safe location voltage of Um=30V. 10. The CX-DM apparatus is not capable of withstanding the 500V insulation test required by clause 6.3.12 of IEC/EN 60079-11:2007 (and by clause 6.8.1 of CSA Std. 142); thus, the enclosure must be grounded.
  • Page 8 2.4 Sensor Mounting Vertically position the CX-DM so the sensor points straight down. The explosion-proof enclosure or junction box is typically mounted on a wall or pole. Teledyne Detcon provides a selection of standard junction boxes in aluminum and stainless steel.
  • Page 9 18” of the enclosure. Crouse Hinds type EYS2, EYD2 or equivalent are suitable for this purpose. NOTE: Water damage from water leaking into the enclosure is not covered by the Teledyne Detcon warranty. NOTE: Unused ports should be blocked with suitable "...
  • Page 10 Figure 7 Typical Installation 2.6 Initial Start Up Teledyne Detcon Model CX-IR sensor assemblies require three conductor connections between power supplies and host electronic controller’s 4-20mA output. Wiring designations are + (DC), – (DC), and mA (sensor signal. Maximum wire ohmic resistance between sensor and 24VDC source is defined below. Maximum wire size for termination in the Teledyne Detcon J-Box accessory is 14 gauge.
  • Page 11 “mA” terminal and the Modbus signals (if used) to the “A” and “B” terminals. Note: the “Y” terminal is not used. 3. Replace the junction box cover after Initial Start Up (Section 2.7). CX-DM Instruction Manual Rev. 1.8 Page 7 of 37...
  • Page 12 Upon completion of all mechanical mounting, apply power to the sensor. Observe the following normal conditions: 1. Upon power up, the sensor will scroll "CX-DM V##.##" and will then display the current reading for about 5 seconds. A temporary upscale reading may occur as the sensor stabilizes. This upscale reading will decrease to "0"...
  • Page 13 4. If a calibration adapter was used during these tests, remove them from the unit, and re-install the Splash Guard. If used, remove the wind guard. Initial operational tests are complete. CX-DM toxic gas sensors are factory calibrated prior to shipment and should not require significant adjustment upon start up. However, it is recommended that a complete calibration test and adjustment be performed 16 to 24 hours after power-up.
  • Page 14 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 . CX-DM Instruction Manual Rev. 1.8 Page 10 of 37...
  • Page 15 Autospan Level ## Modbus ID ## Tempcomp Level ## Last Cal ## Days Sensor Life ###% Temperature ##C Set Detection Range Set Autospan Level Set Modbus ID Bump Test Restore Defaults CX-DM Instruction Manual Rev. 1.8 Page 11 of 37...
  • Page 16 PGM1/2 (3) AutoTime-out Auto Time-Out Auto Time-Out PGM1/2 (M) PGM1/2 (M) PGM1/2 (M) PGM1/2 (3) PGM1/2 (3) PGM1/2 (3) Status is CX-DM V Range ### PGM2 (S) PGM2 (S) PGM2 (S) PGM1 (S) PGM1 (S) PGM1 (S) PGM1/2 (3) PGM1/2 (3)
  • Page 17 Guard (Teledyne Detcon PN 613-120000-700) -or- Threaded Calibration Adapter (Teledyne Detcon PN 943-000006-132) • Zero Air cal gas (or use ambient air if no target gas is present) (Teledyne Detcon PN 942-001123-000) • Nitrogen 99.99% (Teledyne Detcon P/N 942-640023-100) •...
  • Page 18 EAR99 Technology Subject to Restrictions Contained on the Cover Page • Teledyne Detcon Span Gas (See Teledyne Detcon for Ordering Information). Recommended span gas is 50% of range with target gas. Other suitable span gas sources containing the target gas in air or N balance are acceptable.
  • Page 19 • CX-DM ##.## Range ### • • Autospan Level ## Modbus ID ## • Tempcomp Level ## • CX-DM Instruction Manual Rev. 1.8 Page 15 of 37...
  • Page 20 Sensor Status four times before returning to normal operation). 3.4.2 Set Detection Range The CX-DM sensor is calibrated at the factory for the range specified by the customer. Field adjustments to the predetermined range should only be made under direct supervision of Teledyne Detcon.
  • Page 21 AutoSpan: AutoSpan Settings are lost and user must perform new AutoSpan (Section 3.3.2). 3.4.6 Set Modbus Teledyne Detconꞌs CX sensor can be polled serially via Modbus™ RTU. Refer to Section 4 for details on using the Modbus™ output feature. The Modbus™ is adjustable from 01 to 256 in hexadecimal format (01-FF) hex.
  • Page 22 Every request is evaluated by the CX-DM to determine if it is addressed, and if it falls within the register address range. If these two conditions are true, the CX-DM will then verify a valid Function Code. Function Codes supported by the CX-DM are as follows: •...
  • Page 23 EAR99 Technology Subject to Restrictions Contained on the Cover Page Table 2 CX-DM Register Map Register Name Meaning Units 40000 CX-DM-100 Device Type = 42 40001 Range Detectable Range ppm or %(O 40002 Reading Current Gas Reading ppm or %(O...
  • Page 24 EAR99 Technology Subject to Restrictions Contained on the Cover Page 4.2.2 Temperature Compensation – Register 40012 The CX-DM implements temperature compensation for certain gas types. The possible values for this register are as follows: 0 = No temperature compensation 1 = CO - temperature compensation...
  • Page 25 • Remove the Splash Guard and inspected it for blockage, broken, cracked, or missing pieces. • For H2S Sensor assemblies, inspect CX-DM Series Splashguard Adapter Assembly with integral filter (P/N 602-003803-200) for blockage of filter material. • Inspect inside of the Junction Box for signs of water accumulation, signs of corrosion.
  • Page 26 ITM faces toward the front access point. Use the locking nut to secure the ITM in this position. 8. Re-connect the sensor assembly wires to the terminal board inside the junction box. 9. Check and/or perform Zero Calibration and Span Calibration in accordance with Section 3.3. CX-DM Instruction Manual Rev. 1.8 Page 22 of 37...
  • Page 27 • Check for obstructions affecting cal gas hitting sensor face (including being wet, blocked, or corroded). H2S sensors assemblies use CX-DM Series Splashguard Adapter Assembly with integral filter. Clean or replace if necessary. • Replace the plug-in toxic sensor...
  • Page 28 • Check for obstructions affecting cal gas hitting sensor face (including being wet, blocked, or corroded). H2S sensors assemblies use CX-DM Series Splashguard Adapter Assembly with integral filter. Clean or replace if necessary. Replace the plug-in toxic sensor. •...
  • Page 29 Including all implied warranties of merchantability and fitness and the express warranties stated herein are in lieu of all obligations or liabilities on the part of Teledyne Detcon Inc. for damages including, but not limited to, consequential damages arising out of, or in connection with, the performance of the product.
  • Page 30 ITM Electronics Warranty Teledyne Detcon Inc. warrants, under intended normal use, each new CX-DM Sensor ITM to be free from defects in material and workmanship for a period of one year from the date of shipment to the original purchaser.
  • Page 31 ITM - 5.165 inches (131 mm), 8.5 inches (215mm) with Splash Guard Width: 2.2 inches (55 mm) Weight: 2.5 lbs (1.2 Kg) Mechanical Connection: ¾” Male NPT threaded connection with locking nut Electrical Connection: five 18 gauge wire leads - 5.5” long CX-DM Instruction Manual Rev. 1.8 Page 27 of 37...
  • Page 32 Nitrogen Dioxide 371-646400-010 T90<40 -20 to+50 15 to 90 2 years loss/month The last three digits of the Part Number are the range of the sensor cell. I.E. “-100” is a 100ppm range. CX-DM Instruction Manual Rev. 1.8 Page 28 of 37...
  • Page 33 Hydrogen Fluoride HF Toluene C Chlorine Cl Hydrogen Selenide HSe Tungsten Hexafluoride WF Chlorine Dioxide ClO Hydrogen Sulfide H Vinyl Acetate C Chlorine Trifluoride ClF Dimethyl Sulfide C Vinyl Chloride C Diborane B CX-DM Instruction Manual Rev. 1.8 Page 29 of 37...
  • Page 34 415=40 415=340 415=75 415=170 275=170 0.1=0.05 yes n/d COCl 1000=0 50=0.5 100=0.01 100=<1 0.2=0.14 200=40 200=340 200=75 200=170 200=40 200=340 200=75 200=170 n/a – not applicable n/d – no data CX-DM Instruction Manual Rev. 1.8 Page 30 of 37...
  • Page 35 0.2=0.15 5=yes n/d 5000=0 300=0 0.5=-0.04 0.2=0.11 5=yes n/d 300=<5 1=<0.5 200=140 200=100 200=135 200=150 200=50 200=180 200=140 200=100 200=135 200=150 200=50 200=180 n/a – not applicable n/d – no data CX-DM Instruction Manual Rev. 1.8 Page 31 of 37...
  • Page 36 10=0.03 yes n/d COCl %range=0 1%=0 1=0.4 %range=0 3000=0 10=0.1 1=1.0 %range=0 3000-=0 10=1 100=0 100=0 10=<5 200=220 200=275 200=330 200=220 200=275 200=330 n/a – not applicable n/d – no data CX-DM Instruction Manual Rev. 1.8 Page 32 of 37...
  • Page 37 5=<1.5 15=-0.75 35=0 1=-.015 10=0 100%=0 1=0.7 0.3=0.03 COCl 100%=0 0.3=0 0.05=0.005 100%=0 0.05=0.005 100%=0 0.1=0.13 15=0 35=0 5=˜-5 200=415 200=275 200=415 200=275 n/a – not applicable n/d – no data CX-DM Instruction Manual Rev. 1.8 Page 33 of 37...
  • Page 38 3=4(theory) yes n/d yes n/d 5=<1 415=45 415=200 415=200 413=55 5=<2 5=-0.025 1=0.015 COCl 1=0.56 200=45 200=200 200=55 200=45 200=200 200=55 n/a – not applicable n/d – no data CX-DM Instruction Manual Rev. 1.8 Page 34 of 37...
  • Page 39 9.4 Spare Parts, Sensor Accessories, Calibration Equipment Part Number Spare Parts 92C-240400-000 CX-DM-H2S Intelligent Transmitter Module 92C-XX0400-YYY CX-DM Intelligent Transmitter Module for Toxic Gas Sensors (where xx=Gas Code, and YYY=Range) 371-XXXX00- Replacement Plug-in toxic gas sensor (Refer to Table 3 Sensor Specific Data) Sensor Accessories...
  • Page 40 Added Section 2.1, Updated Approvals Label 09/08/14 Added Section 2.1, Updated Approvals Label 06/06/18 Added conduit seal in Section 2.5 01/21/20 Updated Company Information 10/26/20 Updated approvals label, updated company address 03/15/22 Removed approvals label CX-DM Instruction Manual Rev. 1.8 Page 36 of 37...
  • Page 41 EAR99 Technology Subject to Restrictions Contained on the Cover Page This page left intentionally blank Shipping Address: 14880 Skinner Road, Cypress, Texas 77429 Phone: 713.559.9200 http://www.teledynegasandflamedetection.com detcon-sales@teledyne.com • CX-DM Instruction Manual Rev. 1.8 Page 37 of 37...