Field Calibration Procedure; Zero Calibration For Co Sensor; Zero Calibration For No Sensor - Macurco CX-6 Manuel D'instructions

Macurco CX-xx Manual (Rev-1.0) Eng
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".
5. After approximately 45 seconds, the zero calibration is complete. For a successful zeroing, the display will
flash between "PAS.C" and the current CO reading "C 0". If the zero calibration fails, the display will show
FAil.C.
6. The green LED blinks during the process. When the green LED returns to solid, the calibration is complete.
7.4.2 Zero Calibration for NO
To perform a zero calibration for the NO
1. Press Next 3 times to get to the "CAL" menu
2. Press Enter. The display will show "tSC.C".
3. Press Next 3 times.
4. The display will show "000.n". Press Enter.
REV – 1.1
Sensor
2
sensor,
2
[34-2900-0512-0 ] 38 | P a g e