4-22 | Model 933 UV Analyzer
AutoZero
This button initiates an automatic Auto-Zero that controls an automat-
ic adjustment of the analyzer zero. The Zero gas solenoid is turned on
and off automatically during the sequence. The zero offset is adjusted
based on the average reading during the Cal Int Time at the end of
the A-Z Duration countdown.
An Auto-Zero sequence initiated on a timed basis or by a remote con-
tact will not be performed if there is an active Fault alarm.
Zero
Allows you to manually Zero the analyzer. The analyzer zero is ad-
justed automatically based on the average reading during the Cal Int
Time period. The Zero gas must be introduced manually (see Chap-
ter 5).
Cancel Cal
Cancels the calibration sequence (Manual Zero, Auto-Zero, Span).
NOTE
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