Aerosol Carbon Monoxide Test (Carbon Monoxide Only); Field Calibration Procedure; Zero Calibration For Co Sensor - Macurco CX-6 Instrucciones Para El Usuario

Macurco CX-xx Operation Manual

7.3.4 Aerosol Carbon Monoxide Test (Carbon Monoxide only)

The CME1-FTG is an 11L 500 ppm Aerosol Carbon Monoxide Field Test Gas that can be used with the CX-xx. This field
test gas allows installers to do a quick functionality test of the CO sensor. The flow rate of the CME1-FTG is 10 Lpm
so you will have about a minute of gas or enough to test 20-30 sensors.
1. Units to be tested must be powered continuously for a minimum of 3 minutes before proceeding.
2. For optimum test results the unit should be in clean air and be in a low ambient air flow.
3. Check that the CX-xx status indicator light is illuminated, Green continuously. If not, do not proceed with
tests. See section 5.1 On-Board Diagnostics.
4. The display option should be set to "On" and reading 0 ppm in clean air.
5. With the CX-xx cover on, aim the nozzle of the aerosol can into the sensor grate area (under DO NOT PAINT)
and press for 2 to 3 seconds.
6. Wait for a few seconds. The digital display should climb indicating the increased gas concentration at the
sensor confirming a pass of the quick test.
Note: If the Display does not change within 10 seconds, there are four possibilities:
a. Gas cylinder is empty, replace the gas cylinder.
b. Unit needs to be re-calibrated (go through the Field Calibration Procedure and re-test).
c. Detector needs servicing (return unit to factory for servicing).
7. Wait for the display to return to 0 ppm and configure options to desired settings.

7.4 Field Calibration Procedure

NOTE: For optimum calibration results the unit should be in clean air and be in a low ambient air flow.
CX-xx has "CAL" top level menu that can be used to perform a field calibration. "tSC.C", "tSC.n", "000.C", "000.n",
"Spn.C", "Spn.n", and "End" are sub-menus within the "CAL" menu.
"tSC.C" and "tSC.n" are read only and represent the time since last calibration for each sensor. Select either
•
sub-menu and it will display a value in the format YY.MM. "MM" are for months and "YY" for year. E.g. if the
value is 00.05 then it has been zero years and 5 months since the unit was last calibrated.
"000.C"and "000.n" are used to start a zero calibration for each respective sensor. Follow the procedures
•
below to perform a zero calibration.
• "Spn.C" and "Spn.n" are used to start a span calibration for each respective sensor. Follow the procedures
below to perform a span calibration.
• "End" sub-menu is used to exit the "CAL" menu.
A complete field calibration requires a zero calibration and a span calibration. A zero calibration provides a reference
value by exposing the sensor to clean air. A span calibration exposes the sensor to a known concentration of test
gas.

7.4.1 Zero Calibration for CO Sensor

To perform a zero calibration for the CO sensor,
1. Press Next 3 times to get to the "CAL" menu
2. Press Enter. The display will show "tSC.C".
3. Press Next 2 times to get to "000.C" and Press Enter.
4. The display will flash between '000.C' and the current CO reading i.e. "C 0".
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