Instruction Manual
4.4EquipmentRequired
The following tools and equipment will be required for calibration:
-Jewelers Screwdriver
-Calibration Gas
-Calibration gas delivery system
For accurate calibration use a gas mixture at the re- quired concentration mixed in an air balance, rather than with an inert gas like nitrogen. This gas and the required delivery equipment such as the Model 1200- 26 Calibrator is available from Sierra Monitor Corpo- ration.
4.5Alarm Calibration Procedure
1.The monitor should be in the safe condition prior to calibration (green LED “ON”).
-Be sure that the area is
2.With the monitor in operation, expose the sensor to a sample of calibration gas. Apply calibration gas directly to the sensor insuring that the delivery cup loosely covers the sensor. Use 80 PPM H2 for the Model 2050 and 150 PPM CO for the Model 2060.
3.The red LED on the face of the monitor should turn "on". If the alarm occurs within
4.If the monitor fails to alarm within 90 seconds of the application of the gas adjust the potentiometer counter clockwise until the alarm turns "on".
5.If the monitor fails to stop alarming within one minute of the removal of the gas adjust the poten- tiometer clockwise until the alarm stops.
6.After adjustment, repeat steps 4 and 5 to verify cali- bration.
7.When the calibration is complete, reconnect any alarm equipment as necessary.
2050/2060 Gas Monitors (5/04) | Page: 6 |
