Macurco CM-6 User instructions - page 12
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are to be performed at the appropriate Macurco manufacturing facility. Macurco does not sanction any third-
party repair facilities.
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 CM-6 units are factory calibrated and 100% tested for proper operation. 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 Fan and Alarm relays will be activated, the 4-20 mA output
will go to 23 mA, the unit will display the error code and the buzzer will chirp intermittently.
Operation Test
Normally this will be the only test required for the CM-6 and is the recommended way to test the unit or units
after installation. Check that the green CM-6 operating 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 CM-6.
2. Remove the front cover.
3. Observe the LED light on the front of the CM-6.
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 above.
6. Locate the switch labeled ENTER/TEST on the left side of the printed circuit board. Press the Test
switch once.
7. The CM-6 will step through a cycle test:
a. The display progresses through the Art (alarm relay test), Frt (fan relay test) then 42t (4-20
mA 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.
! WARNING
! WARNING