User Manual

6 Using the product
18
Key functions
>
[▲]
or [▼]: Change the readings display.
Possible display combinations:
Evaporation pressure
Refrigerant evaporation
temperature to/Ev
Condensation pressure
Refrigerant condensation
temperature tc/Co
or (only with inserted temperature sensor)
Evaporation pressure
Measured temperature t
oh
/T1
Condensation pressure
Measured temperature t
cu
/T2
or (only with inserted temperature sensor)
Evaporation pressure
Superheating ∆t
oh
/SH
Condensation pressure
Subcooling ∆t
cu
/SC
With two inserted NTC sensors ∆t is additionally displayed.
> [Mean/Min/Max]: Hold readings, min. / max. readings, show
mean values (since switching on).
Leak test / pressure drop test
The temperature compensated leak test can be used to
check the leak tightness of systems. For this purpose both
the system pressure and the ambient temperature are
measured over a defined period of time. For this purpose
a temperature sensor to measure the ambient temperature
may be connected (recommendation: Deactivate the
surface compensation factor (see page 14) and use NTC
air sensors Art.-No. 0613 1712). This provides information
about the temperature compensated differential pressure
and about the temperature at the beginning/end of the test
as a result. If no temperature sensor is connected, you may
also perform the leak test without temperature
compensation.
✓ The actions described in the chapter “Preparing for
measurement” have been performed.
1. Press
[Mode]
- The leak test view is opened.
∆P is displayed.
2. Start the leak test: Press
[R, ►, ■].
3. End the leak test: Press
[R, ►, ■].
- The result is displayed.
4. Confirm the message: Press
[Mode].
- Main menu display.