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electronic GmbH & Co. KG • Heinrichstraße 3-4 • 12207 Berlin • Deutschland • [email protected]
6.2.4 Short-circuit and open circuit (TRANSDUCER)
The power modules are open-circuit and short-circuit proof.
A short-circuit or an open-circuit at the HF output on the power module is indicated by
the "TRANSDUCER" LED.
During the error state, an error signal is emitted at the remote control connection on the
rear of the generator (see section 2.2.2).
During open-circuit operation, the output is blocked on the M 1003 or M 1503 modules
after approximately 30 s. This fault condition is indicated by illuminated LEDs on the
control module, or by no bar display on the processor module.
The above-mentioned error signal is retained.
Error
display:
- on the control module
all presently illuminated LEDs will
fl
ash.
- on the processor module error message on the display.
6.2.5 Dry running identi
fi
cation (DRY)
The power module is equipped with an automatic system to identify dry running, which
generally makes it possible to avoid damage to the ultrasonic transducers, e.g., as a
result of a drop of the liquid level in the cleaning bath.
If the liquid level drops more than 5 mm below the surface of a connected ultrasonic
transducer, the ultrasonic output is considerably reduced in order to avoid damaging
operation without "liquid load".
If the power module identi
fi
es a "dry running state", the "DRY" LED lights up.
During the error state, an error signal is emitted at the remote control connection on the
rear of the generator (see section 2.2.2).
Error
display:
- on the control module
all presently illuminated LEDs will
fl
ash.
- on the processor module error message on the display.
In some installations/con
fi
gurations on-site, it may also be possible that the dry running
indicator lights up without this actually being the case. If the "DRY" LED lights up brie
fl
y
or occasionally, this is not critical. If it remains on permanently, the manufacturer should
be consulted.
Attention:
Dry running identi
fi
cation is not possible when operating a VORTEX reactor or
SONOBLOC tube reactor. During unattended operation, adequate safety measures
should be enforced in order to avoid damage caused by dry running.