Pressure Leak Test
A. The instrument is power on with the blue and red valves turned off.
B. Press the Function button to pressure leak test mode shown as below. The current pressure value is displayed at lower
right corner of LCD.
C. Press the Run/Stop button to start the leak test, as shown below:
At this time, the lower left corner records the initial pressure value; the
lower right corner shows the instantaneous pressure value; the “ΔP”
display area shows the difference between initial pressure value and
instantaneous pressure value.
The time display area shows how long the leak test lasts in the format of
Hour : Minute (HH:MM). All the pressure units on the screen are the
same. You can switch different pressure units by pressing the unit button.
Common problems
Common problems
Low battery power supply
The instruments has low power sign. When it is displayed , it means the battery power is insufficient. At this time, the battery
should be replaced as required in order to avoid affecting normal use.
Damaged refrigerant hose or valve stem
Please check the pipe fittings and the hoses before testing. Once any damage is found , please replace it immediately to
avoid improper use or any accident occurring.
Failure of refrigerant filling
There is a valve core in the refrigerant inlet of the refrigeration system. When connecting the instrument, pay attention to
the two terminals of the hoses. Connect one terminal with a core to the refrigeration system, while another terminal without
a core to the instrument.
Potential leak points
- Every hose terminal comes with a nylon pad that is limited a certain life of using. Over use or other situation will make it
defective, which result in leakage.
- The instrument refrigerant inlet (the middle port of the instrument ) has a port with valve core , which is used to vent the
air in the hoes after connecting the refrigerant to the instrument.
The port is equipped with a copper plug screw. It is required to tighten it every time before or after operation.
- Check the refrigeration system's pipes and connectors.
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MGF
MGF
srl –– Via Chico Mendes, 8 – 43058 Sorbolo Mezzani (PR) Italy –
Tel. +39 0521-818301 Fax: +39 0521-818202
e-mail: [email protected] –
