Cleaning; Testing; Operation Test - Macurco GD-6 User Instructions

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 result in
sickness or death.
CAUTION
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, sensor or instrument housing.

Cleaning

Cleaning of the external surfaces is best carried out using a damp cloth with a mild detergent or soap. Use a vacuum cleaner with soft
brush to remove dust or contamination under the cover. Do not blow out the sensor with compressed air.

TESTING

Using a certified gas with a concentration other than the one listed for this detector 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 Technical
Service at 1-877-367-7891
General
All GD-6 units are factory calibrated and 100% tested for proper operation. During normal operation the green status indicator LED light
will be on steady, the fan & alarm relay will be in standby mode and the 4-20 mA output will be at 4mA (in clean air).The unit also
performs a regular automatic self-test during normal operation. If the unit detects an improper voltage or inoperable component, it will
default into Error mode. In this error mode, the Alarm relay will be activated, the 4-20 mA current loop will go to 24 mA, the unit will
display the error code, the green status indicator LED light will flash and the buzzer will chirp intermittently. The Fan relay will also
engage if the Trouble Fan Setting Option is set to "ON".

Operation Test

Check that the green GD-6 status indicator LED light is illuminated continuously. If not, do not proceed with the tests. If the unit is in
error mode contact your local representative or Macurco technical service representative for information on resolving the problem.
1. Remove the single screw in the middle of the front cover of the GD-6.
2. Remove the front cover.
3. Observe the LED light on the front of the GD-6.
4. If the light is solid green proceed to step 6.
5. If the green status indicator LED light is off or flashing, refer to the General section above.
6. Locate the switch labeled ENTER/TEST on the left side of the printed circuit board. Press the Test switch once.
7. The GD-6 will step through a cycle test:
a. The display progresses through the BUZ (Buzzer Test) Art (alarm relay test), Frt (fan relay test) then 42t (4-20 mA
output test). Make sure that the settings are "on" or not disabled "diS".
b. During the first 10 seconds of the test cycle, the display will show BUZ and set off the audible buzzer
! WARNING
! WARNING
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