Macurco GD Operation Manual
REV – 1.0.0
[34-2900-0027-6 ]
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P a g e
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.
7.4.1
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: 844-325-3050
7.
To return to Normal Mode press Enter and then press Next until “End” is displayed. Press Enter to return to
Normal Mode.
7.4.2
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.
6.
Then press the Enter button to get to “000” Calibration Zero Mode, then press the Next button to get to
“SPn” – Calibration Span Mode.
7.
Press the Enter button and the display will read 10 alternating with the gas, mE, Pro or Hy (blinking),
indicating the sensor is looking for gas.
8.
Start applying gas to the gas sensor.
Note
: The sensor will look for the gas for 45 seconds. If no gas is applied or detected in that time, the display
will return to CAL.
9.
When the sensor detects the gas, the display will flash back and forth between the gas concentration and
SPn and the calibration will progress. The display will show this for a maximum of 165 seconds.
10.
When the calibration is successful, the display will flash back and forth between 10 and PAS.
11.
Remove the gas. The display will return to “SPn”, then normal mode. The calibration is done.
12.
If the calibration fails, the display will flash back and forth between the gas concentration and FAL (fail). 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 11. If the unit fails to calibrate twice contact Macurco Technical Assistance at 1-877-367-7891.
13.
Disassemble the cylinder and regulator.
14.
Re-assemble the GD-6 (make sure the LED is aligned with the hole in the front case).
15.
See Calibration Flowchart on the inside of the housing.
Содержание GD-6
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