TESTO 340 - Cleaning the Flue Gas Probe; Replacing the Probe Preliminary Filter; Replacing the Thermocouple

I.5 Cleaning the modular flue gas probe
Detach the flue gas probe from the measuring
instrument before cleaning.
1
Release the probe catch by pressing the key on
the probe handle and remove the probe module.
Probe shafts with preliminary filter:
Unscrew the preliminary filter.
2
Blow compressed air through the flue ducts of the
probe module and probe handle (see illustration).
Do not use a brush!
Probe shafts with preliminary filter:
Blow compressed air through the preliminary filter. For thorough cleaning, use an
ultrasonic bath or a cleaner for dentures. Screw the preliminary filter back on to
the probe shaft after cleaning.
3
Fit a new probe module on the handle and engage it in place.
I.6 Replacing probe preliminary filter
The preliminary filter in probe modules fitted with a preliminary filter can be replaced.
Unscrew the preliminary filter from the probe shaft and screw on a new filter.
I.7 Replacing thermocouple
1
Release the probe catch by pressing the key on
the probe handle and remove the probe module.
2
Detach the plug-in head of the thermocouple from
its mounting using a screwdriver and pull the
thermocouple from the probe shaft.
3
Lead a new thermocouple into the probe shaft until
the plug-in head engages.
4
Fit probe module on the handle and engage it in
place.
I. Care and maintenance
48