Sensor Poisons; Maintenance; End-Of-Life Signal - Macurco GD-6 User Instructions

NOTE: For trouble codes over 080 the display will alternate between t_1 and t00 for t100 and between t_2 and t00 for t200.
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 Macurco for service, per these User Instructions.
If the error mode indicates "Sensor expired" see the Sensor Life Reset section of 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 silicones, such as the common oil and lubricants with silicon compounds used as additives in machinery,
halogen compounds, which are used in fire extinguishers and Freon used in refrigerants, organo-metallic compounds, sulfur
compounds, chlorine compounds, acetylene, olefins or high concentrations of combustible gas.

MAINTENANCE

The GD-6 is low maintenance. The unit uses a long life pellistor sensor that has a 5+ year life expectancy. The detector's performance
should be tested regularly by using gas as detailed in the Testing and Field Calibration sections. All other maintenance and repair of
products manufactured by Macurco are to be performed at the appropriate Macurco manufacturing facility. Macurco does not sanction
any third-party repair facilities.

End-of-life Signal

The GD-6 has a long life, non-replaceable catalytic bead sensor. Five (5) years after the GD-6 is installed the sensor end-of-life signal
will be activated indicating that the GD-6 has reached the end of its typical usable life. The end-of-life signal will cause an error code
t200 "Sensor expired". See Error Codes section. The end-of-life signal can be silenced for 48 hours by pressing the "ENTER/TEST"
button or by temporarily dropping power to the unit. The end-of-life signal provides the user an opportunity to test and/or calibrate the
sensor assuring that it is still performing within acceptable parameters though the sensor is nearing the end of its expected life. The
silence function will continue to be available for 29 days after the GD-6 initiates the initial end-of-life signal. After this 29 day period the
GD-6 can no longer be silenced and the sensor must be calibrated and the sensor life reset or the GD-6 detector replaced.
Sensor Life Reset
1. Remove the Philips screw on the front of the GD-6. Pull the front cover of the unit off.
2. To reset the sensor life (rSt), from normal or warm-up mode, press the Next button five times to get to SEn or Sensor Mode.
3. Then press the Enter button to get to "rSt" - Reset Sensor Mode.
4. Press the Enter button again to see the sensor reset status. If the sensor life has already been reset, done "don" will be
displayed. If it has not already been reset, "no" will be displayed. Push Next to change it to " YES" (flashing) then push Enter to
confirm the change (solid) and push Enter again to return to "rSt" in the SEn menu. Push Next until "End" is displayed then
push Enter to get back to normal operation. The sensor life will be reset for 1 year.
NOTE : If the sensor is reset and the detector not replaced it is necessary to test and/or calibrate the sensor to assure that it is still
performing within acceptable specifications though the sensor is nearing the end of its expected life. There will be no other indication of
sensor performance.
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