E8500 Instruction & Operations Manual
version 1.017
Page 36 of 49
Gas Sensor Calibration Procedure
The following page illustrates the sequence of key strokes to carry out a span
calibration of the analyzer. It is assumed that the instrument has been auto-zeroed and
there have been no error messages.
Electrochemical Gas Sensors
1. Turn the analyzer on and press OK to perform an autozero. Allow the instrument
to warm up for 15 minutes, and repeat the autozero.
2. Connect the outlet from the tee fitting of the gas calibration fixture to the
connector on the front of the analyzer labeled “SAMPLE IN” using the set up
shown on the following figure:
3. Press the button labeled “CALIB” to enter the calibration menu.
4. Scroll down to the SPAN TIME and set the value to 300 seconds.
5. Scroll down to the sensor to be calibrated. If the calibration lock is on, enter the
password 1315.
6. Use the arrow keys to enter the span value printed on the calibration cylinder.
Press OK.
