3M MACURCO GD-6 - Manual (Page 10)

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operation Test
1. Remove the single screw in the middle of the front cover of the 3M™ Macurco™ GD-6 Combustible Gas Detector.
2. Remove the front cover.
3. Observe the LED light on the front of the 3M™ Macurco™ GD-6 Combustible Gas Detector.
4. If the light is solid green proceed to step 6.
5. If the light is off or flashing Green, refer to the General section of this User Instruction.
6. Locate the switch labeled ENTER/TEST on the left side of the printed circuit board. Press the Test switch once.
7. The 3M™ Macurco™ GD-6 Combustible Gas Detector will step through a cycle test:
a. The display progresses through the art (alarm relay test), Frt (fan relay test) then 42t (4-20mA output test).
b. During the first 5 seconds of the test cycle, the alarm relay will be closed, so any devices connected to that relay will
be tested.
c. The Fan relay will be activated for the next 1 minute of the test, so if the fan circuits are wired in the normal manner,
the fan should run.
d. The 4-20mA output will then ramp up from 4 to 20mA over the next 130 seconds of the test, so if the circuit is wired
in the normal manner, the control panel or building automation system should respond.
e. At the end of the test cycle, the light will turn green and be on steady (Normal Operation), the fan & alarm relay will be
in standby mode and the 4-20mA output will return to 4mA (in clean air).
8. When testing is completed reassemble the unit or units.
Manual operation Test
This option gives the user the opportunity to manually initiate an individual test for each relay, the analog output and the sensor
response to gas. From normal operation mode press the Next button 3 times to get to the Test Mode (tSt). Press the Enter
button once to get into the Test Menu. Press the Next button to scroll through the four test options and press Enter to initiate
the selected test. Note that if the relay or 4–20mA output has been disabled, the test selection will not be displayed in the test
menu.
Art - Alarm Relay Test, 10 seconds
Frt - Fan Relay Test, 60 seconds
42t - 420 loop test, 25 seconds
gtS - Gas Test, 3 minutes (no output to the panel during the gas test)
The display will flash during the test or in the case of the gas test the level will alternate with the expected gas (
mE, pro or Hy).
Once the test is complete, the display will return to steady display. To exit the test menu, press the Next button until “End” is
displayed then press Enter to return to normal mode.
W WarnInG
The following steps must be performed when conducting a calibration or calibration verification test (bump test) to ensure
proper performance of the monitor. Failure to do so may adversely affect product performance and result in sickness or
death.
• When performing a calibration or calibration verification test (bump test) only use certified calibration gas at the
required concentration level. Do not calibrate with expired calibration gas.
• If the instrument cannot be calibrated, do not use until the reason can be determined and corrected.
• Do not cover or obstruct display, audible alarm opening or visual alarm cover.
• Ensure sensor inlet is unobstructed and is free of debris.
Combustible Gas Test
General
The 3M™ Macurco™ GD-6 Combustible Gas Detector can be bump-tested or calibrated with a Field Calibration Kit (FCK) with
Methane, Propane or Hydrogen gas, regulator and test hood, available through your local representative or from 3M Macurco.
Contents of the FCK
• 3M™ Macurco™ Methane Gas Field Calibration Kit GDM-FCK, 34L, 10% LEL, 34L, 20% LEL, Carry Case, Regulator,
Tubing, Calibration Hood
• 3M™ Macurco™ Propane Gas Field Calibration Kit GDP-FCK, 34L, 10% LEL, 34L, 20% LEL, Carry Case, Regulator, Tubing,
Calibration Hood
• 3M™ Macurco™ Hydrogen Gas Field Calibration Kit GDH-FCK, 34L, 10% LEL, 34L, 20% LEL, Carry Case, Regulator,
Tubing, Calibration Hood
FCK Information
Several detectors can be calibrated with one FCK. The only limitation is the amount of gas in the cylinder. The 17 liter cylinder
with 0.2 LPM (Liters Per Minute) regulator has approximately 85 minutes of continuous calibration run time. Replacement
cylinders are available. The gas cylinder should be replaced when the pressure gauge on the regulator shows 25psi or less.
note: For optimum test results it is suggested that the unit be in clean air (solid green light on) and be in a low
ambient air flow.