Macurco GD-6 Manuel D'utilisation page 29

Macurco GD-xx Operation Manual
o 70-0716-1756-0 Propane C3H8 Cal Gas Cylinder 34L 10% LEL (M) (For Calibration and Testing)
o 70-0716-1757-8 Propane C2H8 Cal Gas Cylinder 34L 20% LEL (M) (For Testing)
Cal-Kit 1 Information
Several detectors can be calibrated with one Cal-Kit. The only limitation is the amount of gas in the cylinder. The 34-
liter cylinder has approximately 170 minutes of continuous calibration run time. The gas cylinder should be replaced
when the pressure gauge on the regulator shows 25-psi or less.
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.
7.3 Gas Testing
7.3.1 Testing the Fan Relay
Note: The gas concentration to activate the fan relay depends on the setting.
1. Remove the Philips screw on the front of the GD-6. Remove the front cover.
2. Connect the 10% LEL cylinder of Combustible Gas to the regulator. Ensure that the gas used for calibration
matches the gas selected in the GD-6 configuration.
3. Assemble regulator, hose and test hood and place the test hood over the gas sensor.
4. Check the pressure gauge on the regulator. If you have 25-psi or less you will need to replace the gas
canister.
Note: The time to activate the fan relay depends on the delay 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 GD-6 will show the current concentration of gas or "0" (zero) in
clean air. When the gas concentration reaches the fan relay setting (10% LEL, default setting) the display will
REV – 2.2.0
Figure 7-1 – Calibration Connection
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