Specifications

Instruction 24-9388
38
Fyrite Pro
5.5 Oxygen Sensor Zero
Material Required: • Cylinder of 100% Nitrogen, P/N 9550-0049
• Calibration Kit, P/N 24-7059
Procedure:
1. With the analyzer sampling fresh air, enter the Calibration Mode as
described in Section 5.1. Then repeatedly press the ENTER button
until “O
2
” appears in the lower-left side of the display.
2. Allow pump to run and sample fresh air for at least 1 minute.
3. Use the  and  buttons to set the display to 20.9%.
4. Set up the Calibration Kit with 100% N
2
as described in the instruc-
tions supplied with the kit.
5. Connect the tubing of the Calibration Kit to the GAS inlet of the
analyzer; then adjust the regulator for approximately 2 SCFH of
excess flow (see Figure 5-1).
6. After the analyzer has stabilized (2 to 3 minutes,) use the  and 
buttons to set the displayed value to 0.0%.
7. Disconnect tubing from analyzer and turn off gas flow.
8. Allow the analyzer’s pump to run until the O
2
reading returns to
20.9. If necessary, use the  and  buttons to readjust the reading
to 20.9. Repeat Steps 3 thru 7 to verify the zero adjustment.
9. Press ENTER to store the new calibration values and move to the
next calibration screen, or hold down ENTER for 2 seconds to store
the new calibration values and enter the Run Mode, or press the
I/O button to exit the Calibration Mode and turn OFF the analyzer
without saving the changes.