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7 Maintenance
7-5. Span adjustment
- 49 -
7-5. Span adjustment
Perform the preparation (P.47) before span adjustment.
2-2 SPAN
Perform span (fresh
air) adjustment.
Press the SET button
to display the current
concentration.
Press the
concentration SET
button again. While the
concentration display
is blinking, use the ˅
or ˄ button to adjust
the reading to "20.9%".
Press the SET button.
"PASS" is displayed
when adjustment is
completed, and "FAIL"
is displayed when it
fails.
If "FAIL" is displayed,
perform span
adjustment again.
Span (fresh air)
adjustment will end.