Calibration Check on SC111/112 General Monitors

After perform calibration on Gas detector SC111/112 then will continue to perform calibration check:

1. Position the magnet over the General Monitors logo, The symbol '--' will be displayed for three second and then will begin to flash
2. Remove the magnet and the display will now flash the gas concentration at the sensor. The analog output will be held at 1.5mA regardless of the gas concentration at the sensor.
3. If gas is not applied within 6 minutes the analog output will fall to 0mA and the display will read 'F2'. To recover from this position, replace the magnet over the General Monitors Logo, repeat step 1 and 2 then proceed to step 4 within the timeout period
4. Apply gas at 50% LEL to the sensor. Observe that the gas reading settles at 50+/-5%. Should the final response fall outside this limit, a full calibration is required.    Note : The sensor should be exposed to clean air conditions for at least two minutes prior to entering calibration mode.
5. The display will continued to flash and the analogue output will remain at 1.5mA until the gas has been removed and the level at the sensor drops below 3% LEL approx. Normal monitoring will then be resumed (i.e the display will give a steady reading and the analogue output will follow the gas concentration at the sensor)