TESTO 550i - Pressure Leak Testing Procedure

8 Using the product
23

The newly set refrigerant is displayed in the refrigerant list.
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.
8.4.4 Pressure leak testing
The temperature compensated tightness 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 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 sensor is
connected, you may also perform the pressure leak test without
temperature compensation.
Surface temperature probes (e.g. testo 115i) can also be used for the
temperature-compensated pressure leak testing, 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 Pressure leak test.

The Pressure leak test measurement menu opens.
3
Click on .

Configuration menu opens.