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AQ COMFORT Instruction & Operations Manual Version 1.01 6. Scroll down to the sensor to be calibrated first. If the calibration lock is on, enter the password 1315. 7. Use the arrow keys to enter the span value printed on the calibration cylinder being used. Press OK. 8. When the countdown reaches 3 seconds, there will be a series of beeps indicating that the calibration has been preformed. 9. Verify that the reading for the sensor being calibrated matches the value entered in the calibration menu, and that the reading for all of the other sensors is zero. 10. Turn off the gas flow. 11. Repeat this procedure for each electrochemical sensor to be calibrated. Temperature and Humidity Please contact E Instruments for proper Calibration Procedure Pressure and Air Velocity Calibration Procedure 1. 2. 3. 4. 5. 6. 7. Connect a pressure calibration standard to the pressure (+) connector on the bottom of the instrument. In the SETUP menu, make sure the velocity sensor is off. Press the “CALIB” key to enter the calibration menu. Scroll down to SPAN ∆P and press OK. Using the calibration standard, generate a pressure value near the maximum stated value for the scale being used, for instance 80 mbar if using the mbar range. Enter the value generated as the span value using the arrow keys, and press the enter key. Verify that the reading on the instrument matches the reading on the calibration standard. Page 29 of 44