Calibration Gas Detector SC111/112 General Monitors

When Gas detector Model SC111/112 General Monitors power-up, it will take an initial power-up period of 1 minute approximately, and is observed by the SC111 during which it display "PU". This is to allow the sensor to stabilize, then the display should read '0' if there is no gas present at the sensor. If doesn't occur then refer to manual book, in section troubleshoot.
Calibration SC111/112 General Monitors:

1. Ensure that the SC111 has stabilized for at least 1 hour, and there is no combustible gas present at the sensor. A true zero reading will be obtained when the reading stabilized at the lower value.
2. Place the magnet over the General Monitors logo at the surface body. '--' will appear on the display first to indicate that the magnet has been positioned correctly. Then the display will begin to flash. After a total of 9 second 'AC' will be displayed, indicating that the unit is in the auto-calibration, then remove the magnet.
3. Use a General Monitors Portable Purge or Calibration Chamber to apply gas at 50% LEL (+/-5%) to the sensor. When the SC111 detects this gas it will display 'CP' , this mean 'CP' = CALIBRATION IN PROGRESS
4. Wait until 'CC' is displayed before removing gas. This will normally take less than 2 minutes, 'CC' = CALIBRATION COMPLETE
5. When the gas disperses from the sensor the SC111 will leave CALIBRATION MODE and return to a normal monitoring condition. The display should read '0' when the gas has dispersed.
6. If the above does not occur as describe and a different code is displayed..go to the TROUBLESHOOTING section