![background image](http://html1.mh-extra.com/html/bandelin/dt-31-h/dt-31-h_operating-manual_3809022032.webp)
6/
Maintenance
32/52
1686-001 en/2022-05
Checking indicator lamps
Requirement
• Device is switched off.
Procedure
1. Hold down the start/stop button and press the on/off button.
» All LEDs light up briefly one after the other. Then all LEDs light
up at the same time.
2. Press the start/stop button twice.
» The sonication time that was set last is then displayed again
on the time scale. The "0" LED lights up on the temperature
scale (if present).
» The device is ready for operation again.
Check the output of the ultrasound and the heating.
The output can be checked with a wattmeter between the device
mains plug and the socket.
Procedure
1. Fill the ultrasonic oscillating tank with water.
2. Switch on the ultrasound and, if fitted, the heating one after the
other. Read the output. Switch the heating and the ultrasound
off again.
3. Compare the readings with the technical data. See chapter
.
The measured values may deviate by a maximum of ± 20% from the
values in the technical data.
Checking ultrasonic effect
Check the effect of the ultrasound upon commissioning and at reg-
ular intervals. We recommend a check every 3 months. See chapter
.