Instruction 0024-9395
44
Fyrite Pro
6. Press
ENTER
to store these calibration values and move to the next
cal i bra tion screen, or hold down
ENTER
for 2 seconds to store these
calibration values and enter the Run Mode, or press the
I/O
button
to exit the Cal i bra tion Mode and turn OFF the an a lyz er with out
saving the changes.
7. Remove thermocouple simulator from analyzer.
5.5 Oxygen Sensor Zero
(Model 110/120/125)
Material Required:
• Cylinder of 100% Nitrogen, P/N 9550-0049
• Calibration Kit, P/N 0024-7059
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 de scribed in the in struc -
tions supplied with the kit.
5. Connect the tubing of the Calibration Kit to the GAS inlet of the
an a lyz er; then adjust the regulator for ap prox i mate ly 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.
