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6. Press eNTeR to store these calbraton values and move to the next
calbraton screen, or hold down eNTeR for 2 seconds to store these
calbraton values and enter the Run Mode, or press the I/O button
to ext the Calbraton Mode and turn OFF the analyzer wthout
savng the changes.
7. Remove thermocouple smulator from analyzer.
5.5 Oxygen Sensor Zero
Material Required: • Cylnder of 100% Ntrogen, P/N 9550-0049
Procedure:
1. Wth the analyzer samplng fresh ar, enter the Calbraton Mode as
descrbed n Secton 5.1. Then repeatedly press the eNTeR button
untl "O
2
2. Allow pump to run and sample fresh ar for at least 1 mnute.
3. Use the and buttons to set the dsplay to 20.9%.
4. Set up the Calbraton Kt wth 100% N
tons suppled wth the kt.
5. Connect the tubng of the Calbraton Kt to the GAS nlet of the
analyzer; then adjust the regulator for approxmately 2 SCFH of
excess flow (see Fgure 5-1).
6. After the analyzer has stablzed (2 to 3 mnutes,) use the and
buttons to set the dsplayed value to 0.0%.
7. Dsconnect tubng from analyzer and turn off gas flow.
8. Allow the analyzer's pump to run untl the O
20.9. If necessary, use the and buttons to readjust the readng
to 20.9. Repeat Steps 3 thru 7 to verfy the zero adjustment.
44
• Calbraton Kt, P/N 24-7059
" appears n the lower-left sde of the dsplay.
Fyrite Pro
(Model 110/120/125)
as descrbed n the nstruc-
2
readng returns to
2
Instruction 24-9395
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