7 Maintenance
7-4. Zero adjustment
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7-4. Zero adjustment
Perform the preparation (P.47) before zero adjustment.
2-1 ZERO
Perform zero
adjustment.
Press the SET button
to display the current
concentration.
Supply a N2 gas
(99.5% or more) to the
sensor for three
minutes.
Press the SET button.
"PASS" is displayed
when adjustment is
completed, and "FAIL"
is displayed when it
fails.
If "FAIL" is displayed,
perform zero
adjustment again.
Zero adjustment will
end.