Honeywell 7866 Operation And Maintenance Manual page 70

Operation
To adjust Alarm Limit 1 or 2, refer to Section 5.8 Setting the Alarm Limits. Please note that extreme values
will not be accepted by the controller. For example, an illogical value greater than 100.0 will be
automatically overwritten by the controller with a "100.0".
Check calibration with zero and span gases about once each week. Always allow enough time (possibly
several minutes) for a stable response. If the reading at the output device is not correct, adjust zero and
span, using zero and span gases, in accordance with the procedures as described in Section 5.3 7866
Analyzer Input Calibration. If only a slight zero-gas error exists, it can be corrected without rechecking the
span gas. However, this must be considered a temporary correction and the calibration must be readjusted
using both zero and span gas before another adjustment is made.
60 7866 Triple Range Digital H and CO Analyzer/Indicator - Operation and Maintenance
2 2
9/06