AUTOplus manual
Page 37
INTERNAL FILTER
To protect the analyzer from water ingress a filter is installed inside the casing
to protect the infrared measuring system. This filter will block if care is not taken
during sampling:
•
Ensure any build-up of water in the probe line and water trap are removed as
soon as possible.
•
The external particle filter is changed regularly.
•
The analyzer is allowed to sample fresh air on a regular basis.
•
The analyzer samples fresh air for 3 minutes before switch off.
•
Do not blow smoke from a cigarette into the analyzer.
If you suspect the internal filter is blocked perform the following:
•
Remove the probe connection from the water trap.
•
Empty and clean the water trap with a dry cloth.
•
Fit a new external particle filter.
•
Run the analyzer in fresh air (pump ON) for at least one hour.
If the problem does not clear contact a service agent
8.
ZERO CHECKS AND RE-CALIBRATION
During normal operation of the analyzer the following checks may be requested
as required:
•
Zero setting of all sensors (can also be selected manually)
8.1 Zero setting
The zero setting function sets the working sensors to zero using fresh air. This
function is activated as follows:
•
Following analyzer switch ON.
•
On a timed basis. Following the analyzer first being turned ON a zero will
requested automatically at 15 and then 30 minute intervals. Subsequent
requests will be every 30 minutes.
