Span Calibration For Co Sensor; Span Calibration For No Sensor - Macurco CX-6 User Instructions

Macurco CX-xx Manual (Rev-1.0) Eng
5. The display will flash between '000.n' and the current NO
6. After approximately 45 seconds, the zero calibration is complete. For a successful zeroing, the display will
flash between "PAS.n" and the current NO
FAil.n.
7. The green LED blinks during the process. When the green LED returns to solid, the calibration is complete.

7.4.3 Span Calibration for CO Sensor

To perform a span calibration for the CO sensor,
1. Remove the Philips screw on the front of the CX-xx. Pull the front cover of the unit off.
2. Assemble the CO gas cylinder and regulator together.
3. Check the pressure gauge on the regulator. If you have 25-psi or less you will need to replace the gas
canister.
4. Place the test Hood from the regulator over the CO sensor.
5. Press Next 3 times to get to the "CAL" menu
6. Press Enter. The display will show "tSC.C".
7. Press Next 4 times for "Spn.C" (CO).
8. Press Enter. The display will flash between "GAS.C" and "200".
9. Start applying gas to the sensor.
Note: The sensor will look for the gas for 90 seconds. If no gas is applied or detected in that time, the display
will return to "CAL".
10. When the sensor detects the gas, the display will flash between the "gas concentration" and "SPn.C", then
the calibration will progress, and the display will show the gas level for a maximum of 165 seconds.
11. When the calibration is successful, the display will flash between the "gas concentration" and "PAS.C", then
the display will show the calibration gas level and the calibration is done.
12. If the calibration fails, the display will flash between the "gas concentration" and "FAil.C". If this occurs,
check the pressure gauge on the regulator. If the pressure is less than 25 psi the flow of gas may not be
adequate to properly calibrate the unit. If there is proper pressure in the cylinder repeat steps 4 through 6.
If the unit fails to calibrate twice contact Technical Assistance: 1-877-367-7891.
13. Once the calibration has passed, remove the calibration hood and disassemble the cylinder and regulator.
14. Re-assemble the CX-xx (make sure the LED is aligned with the front case hole). Calibration is complete.
15.
See Calibration Flowchart on the inside of the housing.
7.4.4 Span Calibration for NO
To perform a span calibration for the NO
1. Remove the Philips screw on the front of the CX-xx. Pull the front cover of the unit off.
2. Assemble the NO
2
3. Check the pressure gauge on the regulator. If you have 25-psi or less you will need to replace the gas
canister.
4. Place the test Hood from the regulator over the NO
5. Press Next 3 times to get to the "CAL" menu
6. Press Enter. The display will show "tSC.C".
7. Press Next 5 times for "Spn.n" (NO
8. Press Enter. The display will flash between "GAS.n" and "5.0".
9. Start applying gas to the sensor.
REV – 1.0
reading "n 0.0". If the zero calibration fails, the display will show
2
Sensor
2
sensor,
2
gas cylinder and regulator together.
).
2
[34-2900-0512-0 ]
reading i.e. "n 0.0".
2
sensor.
2
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