Data Sheet

9 Smart App
55
7
Click on Start.

The measurement starts.

Values currently being measured are displayed.

Measured values can be saved or a new measurement can be started.
9.3.4 System Leak Test
The temperature compensated leakage 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.
To this end, a temperature probe may be connected to measure the
ambient temperature (recommendation: Deactivate the surface
compensation factor and use an NTC air probe or Bluetooth
®
temperature Smart Probes) or Smart Probe for air temperature
measurement. This provides information about the temperature-
compensated differential pressure and the temperature at the
beginning/end of the test. Due to the temperature compensation, the
actual pressure drop is displayed as delta P. If no temperature probe is
connected, you may also perform the tightness test without temperature
compensation.
Surface temperature probes (e.g. testo 115i) can also be used for the
temperature-compensated leakage test, but must not be used for
measuring surface temperature. They must be positioned as far as
possible to measure the air temperature.
The 550i, 550s or 557s manifold is used to perform the measurement.
1
Click on Measure.
2
Click on Leakage test.

The Leakage test measurement menu opens.
3
Click on .

Configuration menu opens.