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Summary of Contents for OEL CTS-M20
- Page 1 CTS-M20 CARBON DIOXIDE TRANSMITTER/SENSOR INSTALLATION OPERATION AND MAINTENANCE MANUAL QUATROSENSE ENVIRONMENTAL LTD. 5935 OTTAWA STREE, PO BOX 749 RICHMOND, ONTARIO CANADA KOA 2Z0 PHONE: (613) 838-4005 FAX: (613) 838-4018 Web: www.QELsafety.com Email: QEL@QELsafety.com...
- Page 2 M-20 Operation And Maintenance Manual Configuration: (User settings are set to default settings, unless otherwise indicated below) Default Setting User Setting J3 to Left J3 to Right Gas sensed Carbon Dioxide (CO Signal mode 2-10V Linear 4-20mA Linear Signal “CO From”...
- Page 3 M-20 Operation And Maintenance Manual Special Features Signal output options include negative slope. Signal end-points: adjustable ppm, 0-10V, 0-20mA. Adjustable relay dead-band. Relay can activate for decreasing ppm. Simulation mode to simulate any ppm value from 0 to 5000. Auto Zero to global average over 8-day period. Password protection for user settings.
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Page 4: Table Of Contents
M-20 Operation And Maintenance Manual Table of Contents INTRODUCTION..................4 Principle of Operation ................4 Display ....................5 Keypad ....................5 Output Signal ..................5 Signal Range ..................5 Relay....................7 Power ....................7 OPERATION ....................8 FAULT INDICATION................8 CONFIGURATION..................9 User Interface ..................9 Menu Activation ..................9 Menu Item Selection ................10 Menu Item Alteration ................ -
Page 5: Introduction
M-20 Operation And Maintenance Manual 1. Introduction This manual applies to M-20 units with software Version 3.01 and later (released 2008-01- 03). If you have a product with software Version 1.XX, please contact the factory to obtain a copy of the correct manual. 1.1 Principle of Operation The M-20 is a microprocessor controlled CO Sensor/Transmitter using infrared sensing... -
Page 6: Display
M-20 Operation And Maintenance Manual 1.2 Display The display module is a 2-line by 8-character LCD. The gas concentration display format in measurement mode is as follows: CO2 ppm XXXX Where xxxx is concentration of CO , shown from -999 to 9999. The displayed number includes leading zeros if below 1000. - Page 7 M-20 Operation And Maintenance Manual The corresponding Voltage or Current points can be adjusted between 0V and 10V (for voltage output mode) or 0mA to 20mA (for current output mode). The current (or Voltage) points can be set to any relation, meaning the “Sig From” point and “Sig To”...
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Page 8: Relay
M-20 Operation And Maintenance Manual Example Settings Jumper Analog Output Signal Range “JumperJ3” = “LeftVDC” 0-2500ppm “CO2 From” = “0000ppm” 1.0V – 5.0V 1.0V – 5.0V “CO2 To” = “2500ppm” “Sig From” = “01.00V” “Sig To” = “05.00V” “Clipping” = “Enable” “JumperJ3”... -
Page 9: Operation
M-20 Operation And Maintenance Manual 2. Operation When the unit is powered up, it displays a software revision string, followed by the gas identification string as shown below: The display shows the software revision for 3 seconds: QEL M-20 V3.01 RA Where “V3.01”... -
Page 10: Configuration
M-20 Operation And Maintenance Manual 4. Configuration All configuration of the unit, except the signal output mode (set with J3) is done through a software user menu system. The menu system is protected by a password. To provide protection to certain sensitive parameters, some menu items are hidden and need to be enabled before they can be accessed. -
Page 11: Menu Item Selection
M-20 Operation And Maintenance Manual WARNING: Please keep proper record of the password, should it be changed from the default. Call the factory for support if it was lost. 4.3 Menu Item Selection Use the scroll buttons (Up or Dn) to scroll up and down through the menu tree. TIP: When the bottom of the menu tree is reached, further downward scrolling will roll over to the top. - Page 12 M-20 Operation And Maintenance Manual Item Item Range Default Description/Function Name “CO2 From” 0ppm 0ppm Adjust the lower ppm point for the analog signal output in steps of 50ppm. “CO2 To” - 500ppm. NOTE: This setting is limited to “CO2 To” minus 500ppm.
- Page 13 M-20 Operation And Maintenance Manual Item Item Range Default Description/Function Name “AutoZero” “Yes” or “No” “No” When “AutoZero” is set to “Yes”, the unit will gather the lowest ppm reading in an 8-day period and set the unit calibration so that the lowest reading indicate the global average of around 360ppm.
- Page 14 M-20 Operation And Maintenance Manual Item Item Range Default Description/Function Name “DelayOff” 0 – 60 minutes 0 min “Delay Off” is the time delay in minutes after the concentration passed the “RelayOff” concentration until the relay is de-energized. This delay can be used to extend the fan running time after the concentration has dropped below “RelayOff”.
- Page 15 M-20 Operation And Maintenance Manual Item Item Range Default Description/Function Name “Calibr..” “Enable” or “Disable” “Disable” CAUTION: Do not choose “Enable” if you do not intend to calibrate the unit and have calibration gas available. If “Disable” is selected, this item is the end of the menu list.
- Page 16 M-20 Operation And Maintenance Manual Item Item Range Default Description/Function Name “Span Cal” 2500ppm ± 50ppm 2500ppm NOTE: Please refer to the Calibration section in the text below for more information. EXCEPTION: It is also possible to calibrate the span with a different span gas concentration than 2500ppm.
- Page 17 M-20 Operation And Maintenance Manual Item Item Range Default Description/Function Name “Factory.” “Enable” or “Disable” “Disable” CAUTION: Do not choose “Enable” if you are not familiar with technical procedures. Some of the items in the Factory Menu Require Zero Gas, and some require a calibrated DMM.
- Page 18 M-20 Operation And Maintenance Manual Item Item Range Default Description/Function Name “Sig Cal” 0800 – 1023 NOTE: Calibrating this setting in the mode required for the specific application will deliver better accuracy for the signal level. NOTE: The indicated value is a TIP 1: proportion of 1023, If you are using the 0-20mA output mode...
- Page 19 M-20 Operation And Maintenance Manual Item Item Range Default Description/Function Name “Glob Ave” 0000 – 5000ppm 360ppm This item is used by the AutoZero function. Change it only if the global average changes (guaranteed over time to change) or if you want to use a different value for the AutoZero function.
- Page 20 M-20 Operation And Maintenance Manual Item Item Range Default Description/Function Name “Defaults” “User” or “All” “User” WARNING: Choosing “All” will restore defaults to all items in the menu tree, including the factory settings. User Settings: To load defaults to all user items, press Enter (* appears) choose “User”...
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Page 21: Calibration
M-20 Operation And Maintenance Manual 5. Calibration This section is complemented by the detailed procedures outlined in the menu tree table above. Refer to the menu tree table when performing a calibration. In general, calibration should be performed at an ambient temperature close to the temperature to which the unit will be exposed during operation. -
Page 22: Zero Calibration
M-20 Operation And Maintenance Manual 8) When you are satisfied that the gain is good and the value is stable, press Enter (the * will go off and the value will stop changing). It is normal for the value to fluctuate up or down by up to 5mV. -
Page 23: Troubleshooting
M-20 Operation And Maintenance Manual 6. Troubleshooting The microprocessor will detect various component faults and out-of-range conditions, should they occur during normal operation. When a fault is detected, the output signal is dropped to 0.0 mA (or 0.0V) and the fault indicated on the LCD. - Page 24 M-20 Operation And Maintenance Manual Problem Suggested Course Of Action Signal not showing the Check if J3 not set for voltage output. correct amount of mA. Check if burden resistor not too high. Signal supposed to give Check if J3 not set for current output. 2-10V, but is pinned high above 10V.
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Page 25: Fault Codes
M-20 Operation And Maintenance Manual 6.2 Fault Codes Should the unit detect an internal fault, it is categorized and the fault is indicated by a fault code. A fault code will be shown for five seconds, after which the unit will attempt to recover to normal operation. -
Page 26: Duct Mount Adapter (Cts-M2000X-D00000)
M-20 Operation And Maintenance Manual 7. Duct Mount Adapter (CTS-M2000X-D00000) The Duct Adapter enables the M-20 to be used for monitoring moving air inside ducting. Screw in the two hose barbs supplied with the Duct Adapter and mount the adapter as shown. -
Page 27: Wiring And Power Supply
M-20 Operation And Maintenance Manual 8. Wiring and Power Supply The M-20 Power Supply input is isolated internally from the electronics. This allows it to be connected to all possible power and signal grounding configurations without compromising performance. In the following diagrams, G1 is an internal signal ground for the monitor. It may or may not be common with the power supply ground. -
Page 28: Figure 8 - 24Vdc Supply With Common Ground (3-Wire Installation)
M-20 Operation And Maintenance Manual Figure 8 - 24VDC Supply with Common Ground (3-Wire Installation) Figure 9 - 24VDC Supply with Separate Ground (4-Wire Installation) Figure 10 - 24VDC Ungrounded Supply (4-Wire Installation) Figure 11 - 24VDC Ungrounded Supply (3-Wire Installation) 83550-003-001 Revision C 2008-01-03... -
Page 29: Warranty Statement
M-20 Operation And Maintenance Manual WARRANTY STATEMENT The information contained in this manual is based upon data considered accurate; however, no warranty is expressed or implied regarding the accuracy of this data. All QEL equipment is warranted against defects in material and workmanship for a period of two years from date of shipment with the following exceptions: Electrochemical Sensors (Toxic) Six Months...