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Leak detection probe
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
gas mixtures.
It is not possible to work with other probes simultaneously when operating the leak
protection probe.
Duration of measurement with leak detection probe when batteries are fully recharged:
max. 2 hours.
Remove leak detection probe immediately once the measurement is complete.
Never leave a leak detection probe plugged in when recharging a battery.
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.
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.
Barometric pressure has a yearly average of 1013 mbar above sea level. Depending on the
current weather, this pressure can deviate by approx. ±20 mbar from the annual mean (high
pressure and low pressure area).
Barometric pressure can be measured, saved and documented (on PC or as a printout on site)
using the
testo 400
or
testo 650
measuring instrument together with the absolute pressure
probe (Part no. 0638.1645).
Connect absolute pressure probe (part no. 0638.1645) to measuring instrument and switch on.
The measuring instrument displays the current absolute pressure measured at your elevation
(unit: hPa).
To attain the prevailing barometric pressure calculated above sea level, the following must be
carried out:
1. Enter the elevation in metres above mean sea level in
SPECIAL-P
ARAMETER
-Metres amsl
.
2. Allocate one of the 3 function buttons with the function
(= barometric measurement).
3. Press
function button.
The measuring instrument now displays barometric pressure (unit: hPaB).
To return to absolute pressure measurement, allocate one of the 3 function buttons with
and confirm.
You can adjust the displayed value to a known reference value in
PROBE-A
DJUST
. The
adjustment results in a system accuracy of ±1 hPa for barometric pressure measurement in the
reference value range. You can call your local weather station, for example, for the reference
value.
Adjustment:
Use probe connection socket
1
for the adjustment!
Switch on instrument and wait until the measurement menu appears.
Press button.
Select “Probe” - “Adjust”
Enter reference value with the help of the arrow buttons.
Confirm with
button.
Adjustment is reset via “Probe” - “Reset”.
AbsP
BaromP
BaromP
Barometric measurement
