Macurco RD-xx User Manual
REV – 2.1
[34-2900-0511-7 ]
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Note
: The sensor life will be reset for 1 year. After sensor life is reset the unit will display t8000 error code which can only
be resolved with successful field calibration. This feature forces user to calibrate unit after sensor reset before use.
Note
: If the sensor is reset and the detector not replaced, it is necessary to test 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.
WARNING
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
product performance.
6.2
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 a soft brush to remove dust or contamination under the cover. Do not blow out the sensor with compressed air.
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. High voltage terminals (100-240VAC) are
located within this detector, presenting a hazard to service technicians. Only qualified technicians should open the detector case
and service the internal circuits. Ensure power is removed from the detector prior to cleaning the unit.
7
Testing
All RD-xx 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”.
WARNING
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.
7.1
Operation Test
Check that the green RD-xx 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 Support representative for information on resolving the
problem.
1.
Remove the single screw in the middle of the front cover of the RD-xx.
2.
Remove the front cover.
3.
Observe the LED light on the front of the RD-xx.
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.
