Specifications

CO2 Analyzers 3100 & 3150
Instruction 19-9339 44
8.3 User Calibration Trouble Shooting
Error Remedy
User Zero Failed A possible reason for this is because the instrument is trying to
zero to a level which is outside the predetermined range set when
the unit was calibrated at the factory. To rectify this, fi rst ensure
the unit contains absolutely none of the gas which is being zeroed
by fl ushing thoroughly with nitrogen. If it will not zero, then refer to
the instructions given in the “FACTORY SETTINGS” section. If the
instrument continues to fail to zero then the unit must be returned to
your nearest Bacharach Service Center for investigation.
Calibration Failed Check that the span target is set to the correct value. If not, cor-
rect and retry spanning the channel. Repeat the entire procedure,
including zeroing the channel, and then calibrate the span. Ensure
that the reading is stable before spanning the channel.
8.4 Cross-Gas Effects
Carbon Dioxide is measured by infrared absorption at a wavelength
specifi c to carbon dioxide. Therefore, the carbon dioxide reading will
not be affected by any other gases. The oxygen sensor is a galvanic
cell type and suffers virtually no infl uence from CO
2
, CO, H
2
S, NO
2
,
SO
2
, or H
2
, unlike many other types of oxygen cell.
8.5 Hardware Reset
If for any reason the instrument ‘locks up’ and will not switch off, it is
possible to force a hardware reset. Press and hold the “ON/OFF” key
for 10 seconds; wait at least 15 seconds and the instrument should
restart automatically.
NOTE: Performing a hardware reset may cause loss or corruption of
currently stored data including the time and date.