6
Overrange
When the gas sample exceeds
1999 ppm, a “1” is displayed on the LCD. To clear
an overrange condition, leave instrument turned on
and sample fresh air until the LCD returns to displaying CO.
Low Battery Indications
When the battery voltage
becomes low, the “LO BAT” indicator appears.
Although the instrument will continue to operate
and give CO readings under these conditions, the batteries should be
replaced as soon as possible.
When battery voltage becomes too low for the
instrument to operate, a “-1” is displayed on the
LCD. No CO readings are provided under these
conditions.
4.7 Long-Term Storage
When storing the Monoxor 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 CO sensor, thus keeping it from
being destabilized while not in use.
5 MAINTENANCE
The Monoxor II needs to be calibrated at regular intervals to be cer-
tain that it still meets its accuracy specifi cation. A regular calibration
schedule should be established between you and your nearest Bacha-
rach Service Center, unless your facility has the necessary calibration
equipment and personnel trained in the maintenance of gas-detection
equipment. Detailed calibration , maintenance procedures and re-
placement parts lists are provided in the Service Manual (0019-9166).
As a quick check of the instrument’s operation, perform a response
check by exposing the instrument to a source of CO (e.g., cigarette
smoke, smoke from a recently snuffed-out match, bottled CO). If the
instrument doesn’t show the presence of CO, or if the reading is obvi-
ously in error, DO NOT use the instrument until it has been serviced
by an authorized Bacharach Service Center.
NOTE:
DO NOT use this simple response check as a sub-
stitute for ensuring the instrument is properly calibrated.
