Overrange
When the gas sample exceeds 1999 ppm, a “1” is displayed on the LCD. To clear an overrange con- dition, leave the instrument turned on and sample fresh air until the LCD returns to displaying SO2.
Low Battery Indications
When the battery voltage becomes low, the “LO BAT” indicator appears. Although the instrument will continue to operate and give SO2 readings
under these conditions, the batteries should be replaced as soon as possible.
When the battery voltage becomes too low for the instrument to operate, a
4.7 Long-Term Storage
When storing the Dioxor II for extended periods of time, set its POWER switch to OFF and remove the batteries. The POWER OFF position places a short across the SO2 sensor, thus keeping it from being destabilized while not in use.
5 MAINTENANCE
The Dioxor II needs to be calibrated at regular intervals to ascertain that it still meets its accuracy specification. A regular calibration schedule should be established between you and your nearest Bachar- ach Service Center, unless your facility has the necessary calibration equipment and personnel trained in the maintenance of
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