User Manual

Sensor Life Reset

1. Remove the Philips screw on the front of the CM-12. 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 four 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.

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 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. 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. Failure to do so may result in sickness or death.

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-12 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

! WARNING