32
Maintenance
8. Turn the monitor on and the newly installed sensors should be
properly identified by the EntryRAE in the start-up screen. Let the
monitor run for 15 minutes before calibration.
9. Calibrate all sensors prior to use.
CO Sensor Charcoal Filter
The carbon monoxide (CO) sensor may be sensitive to hydrocarbons, so
use a charcoal fi lter (P/N 008-3006-005) to reduce or eliminate organic
vapor contamination or cross-sensitivity. The charcoal fi lter is installed in
the gas plate above the CO sensor. Under normal operation conditions,
the charcoal fi lter lasts from four to six weeks before it needs to be
replaced. If the monitor has been exposed to high concentrations of
VOC gases for a prolonged period of time, the carbon fi lter needs to be
replaced more frequently.
Place the carbon fi lter above the CO sensor on the gas plate.
NOTE:
The CO charcoal fi lter lowers the reading if it is accidentally used
on other sensors.
Figure 16. CO and charcoal filter locations.
CO Sensor
CO Sensor
Charcoal filter location
Charcoal filter location
