Field Calibration Procedure - Macurco GD-6 User Instructions

4. The display option should be set to "On" and reading 0% LEL in clean air.
5. With the GD-6 cover on, aim the lighter into the sensor grate area (under "DO NOT PAINT") on the front cover and release the
gas (without igniting the flame) for 1 second or less
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, consider these possibilities:
a. Lighter is empty.
b. Unit needs to be re-calibrated (go through the Field Calibration Procedure in these User Instructions
and re-test).
c. Detector is in need of servicing (return unit to factory for servicing).
7. Wait for the display to return to 0% LEL and configure options to desired settings.

FIELD CALIBRATION PROCEDURE

Note: For optimum calibration results the unit should be in clean air and be in a low ambient air flow.
Zero the Sensor
1. Remove the Philips screw on the front of the GD-6. Pull the front cover of the unit off.
2. To select Calibration Zero Mode (000), from normal mode, press the Next button four times to get to CAL or Calibration Mode.
3. Then press the Enter button to get to "000" - Calibration Zero Mode.
4. Press the Enter button and the display will read 0 alternating with 000 (blinking) indicating zero calibration in progress (max
165 sec).
5. If the process is successful, the display will read __0 alternating with PAS (blinking) Zero Calibration complete.
6. If the process was not successful the display will read __1 alternating with Fail (blinking) Zero Failed. If this occurs, repeat
steps 2 through 4. If the sensor fails to zero twice contact Technical Assistance: 1-877-367-7891.
7. To return to Normal Mode press Enter and then press Next until "End" is displayed. Press Enter to return to Normal Mode.
Calibration
1. Remove the Philips screw on the front of the GD-6. Pull the front cover of the unit off.
2. Assemble the 10% LEL gas cylinder and regulator together. Ensure that the gas used for calibration matches the gas that the
GD-6 is configured to (mE, Pro or Hy).
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 gas sensor.
5. To select Calibration Span Mode (SPn), from normal mode, press the Next button four times to get to CAL or Calibration
Mode.
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