Gas Testing; Testing The Fan Relay - Macurco CX-6 Instrucciones Para El Usuario

Macurco CX-xx Operation Manual
Note: For optimum test results it is suggested that the unit be in clean air, green light on, and be in a low ambient air
flow.
It is critical to perform zeroing of the sensor in clean air. In the situation or application where the absence of target
gas (CO or NO ) cannot be guaranteed, it is suggested to use Zero Air (20.9% O
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zeroing of the sensor.

7.3 Gas Testing

7.3.1 Testing the Fan Relay

1. Remove the Philips screw on the front of the CX-xx. Remove the front cover.
2. Open the FCK. Connect the gas cylinder to the regulator.
3. Check the pressure gauge on the regulator. If you have 25-psi or less, you will need to replace the gas
canister.
4. Assemble the regulator, hose, and Calibration Hood and place the Calibration Hood over the sensor to be
tested.
NOTE: The time to activate the Fan Relay depends on the Fan Relay Delay "Frd" setting.
5. Turn on the regulator to start the gas flow and wait with the gas applied continuously.
6. With the display function turned "On", the CX-xx will flash between the current concentration of CO and
NO , or "0" (zero) in clean air. When the gas concentration reaches the Fan Relay setting, the display will
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flash between "FAn" and "current gas reading". With the display function turned" Off", the display does not
show the gas concentration, but will show "FAn" while the fan relay is activated.
REV – 1.1
Figure 7–1 - Calibration Kit Connection
[34-2900-0512-0 ]
balance nitrogen) calibration gas for
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