5. Operation
19
- The heating and zeroing phase (approx. 45 s)
starts. The green LED of the set gas type flashes
during this period.
i
During the heating and zeroing phase, set the gas
type to be detected: press and hold (small key) until
a signal is heard.
- The green LED of the set gas type lights up when
the heating and zeroing phase is over. The ticker
tone for the acoustic indication of the gas
concentration is heard (testo 330:
Alarm signal
must
be switched on). The probe is now ready to
operate.
6.
Using the probe
According to DVGW (German Technical and Scientific
Association for Gas and Water) bulletin G465-4, gas
detectors must be subjected to a sensitivity test with a
test gas of 1 vol.% methane before every test of a pipe
system.
Gas concentrations below the lower explosion limit can be
reduced by ventilating the rooms.
±
Detecting ggases/leak ddetection:
Risk oof ddeath ffrom ggas eexplosion!
There may be a risk of explosion if the measuring
limit is exceeded (all LEDs for displaying the gas
concentration are lit).
i
Leave the building immediately and call the
responsible gas utility company or fire service!
The gas leak detection probe is ready to operate.
º
See the chapter
O
PERATION
.
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