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AUTOMATIC LEAK CHECK
The automatic leak check determines the pressure drop in the supply line being tested as
follows:
•
Pressure build-up until reference pressure (150mbar) is reached
•
Resting time of about 5 minutes
•
Measurement of pressure drop within a period of 5 minutes
•
Display of pressure drop
The current phases of the leak check are shown with two LEDs:
Phase
Status
LED resting time
LED measuring time
Stand-by Leak check not active
off
off
Phase 1 Pressure build-up
lit
off
Phase 2 Resting time running
flashing
off
Phase 3 Measuring time running
off
flashing
Phase 4 Display of pressure drop
off
lit
Phase 1: Pressure build-up:
The pressure in the system is raised to 150mbar with the integrated pump. If the pressure is
already
>
150mbar but
<
170mbar, the leak check is carried out at the existing (greater)
pressure, if the pressure is
>
170mbar, the leak check is aborted (see error message
E3
).
If during pumping the pressure drops by 5mbar or more within 10 seconds (e.g. due to
equalisation processes), the pressure is again raised to 150mbar. If 150mbar is not reached
within 1 minute, the leak check is aborted (see error message
E2
).
Phase 2: Resting time:
Before the measurement is carried out, a resting time of 5 minutes is required so that the
pressure in the system can equalise. If the pressure drops during the resting time, the leak
check is aborted (see error message
E1
).
Phase 3: Measuring time:
The pressure is monitored during the 5 minute measuring time. If the pressure drops by
>
10mbar during the measuring time, the leak check is aborted (see error message
E1
).
Phase 4: Results display:
At the end of the measuring time, the result of the test is shown in the display and you will
hear an acoustic signal. The connected printer automatically prints a test log in duplicate.
The test result (pressure difference in mbar) is the difference between the measured
pressure before and after the measuring time.
After a few secondst a second acoustic signal
sounds, press the
Test
button to finished the leak test.
Display via Info button
Information about pressure and time is displayed during the automatic leak
check. Press the
Info
button to select pressure or expired time. If the leak testing is
inactive, a test log with the values from the last test carried out can be printed by pressing
the
Info
button.
