Leak Detection Probe - TESTO 400 Instruction Manual

Using the leak protection probe explosive and combustible gases and in particular natural and
liquefied petroleum gas can be detected in the air, even in small concentrations e.g. it can be used
to detect leaks in gas pipelines, containers or instruments.
The leak detection probe and measuring instrument should not be used in
closed rooms or systems in which an explosive mixture of gases has
developed. The use of other electrical instruments is not permitted.
Ensure that the concentration of gas does not exceed 20 % of the lower explosion limit of
It is not possible to work with other probes simultaneously when operating the leak
Duration of measurement with leak detection probe when batteries are fully recharged: max.
Remove leak detection probe immediately once the measurement is complete.
Never leave a leak detection probe plugged in when recharging a battery.
Procedure:
• Connect leak detection probe before switching on the measuring instrument.
• When the instrument is switched on the warm-up phase of the leak detection probe is
started (approx. 10 seconds). Green LED, continuous tone.
• Ready to operate: Green LED is permanently on, continuous tone no longer sounds.
• Searching for leaks:
- audible acoustic signal (ticking) if gas is flowing out, ticking becomes faster as the
concentration increases.
- if the 1st limit is exceeded (> 200 ppm) the yellow LED lights up.
- if the 2nd limit is exceeded (> 1%) the red LED lights up, continuous tone
No further probe readings are shown in the display.
gas mixtures.
protection probe.
2 hours.
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Leak detection probe