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9. Press eNTeR to store the new calbraton values and move to the
next calbraton screen, or hold down eNTeR for 2 seconds to store
the new 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.
5.6 CO Sensor Zero & Calibration
(Model 100/105/120/125)
Material Required: • Cylnder of 100 ppm (P/N 51-1994) or
To mprove the accuracy of the CO readng, we suggest that f the analyzer
wll be prmarly used for flue gas testng, then calbrate usng 500 ppm
CO. If the analyzer, however, wll be prmarly used for ambent testng,
then calbrate usng 100 ppm CO.
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 "CO" appears n the upper-left sde of the dsplay.
2. Allow the pump to run and sample fresh ar for at least 1 mnute.
3. Use the and buttons to set the dsplayed value to 0 ppm.
4. Do one of the followng:
a. End ths procedure and save the new zero value by holdng down
the eNTeR button for 2 seconds; after whch, the analyzer enters
ts Run Mode.
b. Contnue wth Step 5 to span the CO sensor on a known concen-
traton of carbon monoxde.
5. Set up the Calbraton Kt wth 100 or 500 ppm CO as descrbed n
the nstructons suppled wth the kt.
Instruction 24-9395
Fyrite Pro
500 ppm (P/N 24-0492) CO calbraton gas
• Calbraton Kt, P/N 24-7059
45
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