3M GD-6 Benutzerhandbuch

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To select the Fan Minimum Runtime setting, in normal mode, press the 

Next button twice to get to “Con” or the Configuration 

menu. Then press the 

Enter button to enter the Con menu. The ninth selection is the “Frr” or Fan Minimum Run Time. Press 

Next eight times to get to “Frr” then press Enter. If the runtime is “OFF” (disabled) press Next to change it to 3, 5, 10 or 15 

minutes (flashing) then press 

Enter to confirm the change (solid) and press Enter again to return to “run” in the Con menu. 

Press 

Next until “End” is displayed then press Enter to return to normal operation.

To select the 

4-20ma output option, in normal mode, press the Next button twice to get to “Con” or the Configuration menu. 

Then press the 

Enter button to enter the Con menu. The tenth selection is the “420” or 4-20mA Output Option. Press Next 

nine times to get to “420” then press 

Enter. If the 4-20mA is “On” press Next to turn it to “OFF” (flashing) then press Enter to 

confirm the change (solid) and press 

Enter again to return to “420” in the Con menu. Press Next until “End” is displayed then 

press 

Enter to return to normal operation. 

The 3M™ Macurco™ GD-6 Combustible Gas Detector monitors all critical functions of the unit through software diagnostics 

that continuously test and verify unit operations. If a problem is found, the unit will switch to a fail-safe/error mode or trouble 

condition. In this error mode, the Fan and Alarm relays will be activated; the 4-20mA current loop will go to 24mA and the LED 

light will Flash Green. This is a safety precaution. To clear this mode, simply turn off power to the unit for a few seconds, or 

press the TEST switch (inside the unit). This will cause the unit to restart the 1 minute self-test cycle. 
The 4-20mA signal can be used for troubleshooting:

•  0mA is most likely a connection problem
•  4-20mA is normal gas reading range (0-50% LEL)
•  24mA indicates a Trouble condition

Error Codes

•  t01

Sensor is missing

•  t02

Temperature compensation failed

•  t04

Bad EEPROM checksum

•  t08

Sensor is shorted

•  t10

Bad EEPROM

•  t20

Bad factory calibration

•  t40

Factory calibration was not done

•  t80

SDADC reading failed

If the error mode repeats frequently, check for continuous power and proper voltage. If power is not the problem and a unit has

repeating error conditions, it may need to be returned to 3M Macurco for service, as noted in these User Instructions.
Sensor poisons

The gas sensor in the detector is designed with extreme sensitivity to the environment. As a result, the sensing function may be 

deteriorated if it is exposed to a direct spray from aerosols such as paints, silicone vapors, etc., or to a high density of corrosive 

gases (such as hydrogen sulfide, sulfur dioxide) for an extended period of time.

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Do not disassemble unit or attempt to repair or modify any component of this instrument. This instrument contains no 

user serviceable parts, and substitution of components may impair intrinsic safety, which may adversely affect product 

performance and

•  Avoid the use of harsh cleaning materials, abrasives and other organic solvents. Such materials may permanently

scratch the surfaces and damage the display window, labels, or instrument housing.

Cleaning of the external surfaces is best carried out using a damp cloth with a mild detergent or soap. Vacuum under the cover 

with soft brush to remove dust or contamination.
Testing

Using a certified gas with a concentration other than the one listed for this instrument and sensor when conducting a 

calibration or calibration verification test (bump test) will produce inaccurate readings. This means that higher levels of the 

gas being monitored may be present and could result in overexposure and

 cause sickness or death. For proper use, see 

supervisor or User Instructions, or call 3M in U.S.A., 1-800-243-4630. In Canada, call Technical Service at 1-800-267-4414.

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General
There are multiple ways to test the 3M™ Macurco™ GD-6 Combustible Gas Detector after installation: Operation Test,

Manual Operation Test, Combustible Gas Test and Quick Gas Test. The 3M™ Macurco™ GD-6 Combustible Gas Detector 

also has the ability to test itself automatically and does so every 2 1/2 minute cycle. If the unit detects an improper voltage or 

inoperable component it will default into Error mode. In Error mode, the unit will Flash Green and both the fan & alarm relay

will be actuated. Check that the 3M™ Macurco™ GD-6 Combustible Gas Detector OPERATING LED type light is illuminated, 

continuously. If not, do not proceed with the tests. If the unit is in error mode contact your local representative or 3M Macurco 

Technical Service representative for information on resolving the problem.

The 3M™ Macurco™ GD-6 Combustible Gas Detector does not require regular maintenance other than cleaning. The unit uses

a long life pellistor sensor that has a 5+ year life expectancy. All maintenance and repair of products manufactured by 3M are 

to be performed at the appropriate 3M manufacturing facility. 3M does not sanction any third-party repair facilities.