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probe check
off
scan frequency off
contrast
197
operating mode ampl.
off
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electronic GmbH & Co. KG • Heinrichstraße 3-4 • 12207 Berlin • Deutschland • [email protected]
3.2.3
Special functions
Additional functions are available within a second menu level. These can be accessed by pressing
and holding the “ MENU” button for approximately 2 seconds. Switching between these functions is
accomplished in the manner already described. The menu level can only be exited by pressing the
“START/STOP” button. In doing so, settings and function statuses are accepted and executed.
Check the ultrasonic transducer
Search for resonance frequency
Setting the monitor contrast
Setting the type of ultrasound
regulation
Check the ultrasonic transducer [probe check]
This function is used for quick veri
fi
cation as to whether the ultrasonic transducer is recognised
by and can be correctly activated by the HF generator. After a change in probe or in operating
conditions, it could be the case that the HF generator, for example, cannot synchronise with the
ultrasonic transducer and issues an error message, e.g. Error 011. The HF frequency is reset to
the base value and the function is restored if no device fault or other cause is present.
The set value is “off”. In order to activate the function, set the parameter to “start” using the rotary
knob, and then press the “START/STOP” button. See chapter 6.2.1 for additional information.
Search for resonance frequency [scan frequency]
This function is an expansion of the above-mentioned “probe check” function. In addition, a
frequency scan is conducted in order to determine the correct HF or ultrasound frequency for the
ultrasonic transducer. Depending upon the probe used and the operating conditions, the frequency
can
fl
uctuate signi
fi
cantly, in some instances. When switched off, the HF generator saves the
current frequency value and uses it as the start value when switched on again. If there are
signi
fi
cant deviations in the current HF frequency, this can lead to malfunctions.
Note:
After a successful scan while in continuous operation ( pulsation = off, time > 30 s), start with an
amplitude setting of 50 % and check the operation. Next, set the desired value.