The meter unit – Soniclean SONIC-250 User Manual
Page 6

Soniclean UPM User manual
2.2. The meter unit
The UPM meter unit is housed in a small plastic box (
68
mm wide, 130 mm tall, 25 mm thick)
. It contains the
processing and display circuitry. Power can be supplied
by an internal user-replaceable 9V battery or an user-
supplied DC adapter. The UPM consumes between 5 mA
and 70 mA while operating.
The UPM is operating normally whenever the Power LED is
lit. Normally this will occur whenever the pushbutton is
pressed. If the Power LED does not come on when the
button is pressed it indicates that the battery is flat and
needs to be replaced.
The front of the UPM also accommodates the 10-segment
LED bargraph used to indicate the ultrasonic
performance. The figure shows the front and upper side
3
Figure 2: Left - The UPM meter unit's front panel. Right
– the upper side panel of the UPM meter showing the
probe plug in the centre and the DC power connector
to the right.