User Instructions

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. 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 CM-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 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 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 CM-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

c. The alarm relay will be closed, so any devices connected to that relay will be tested.

d. 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