Wöhler DH 420, Руководство по эксплуатации

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Operating
36
5 Operating
5.1 Switching the digital meter counter on / off
Fig. 30: Display with control button

To switch the digital meter counter on and off
press and hold the control button for approx. 2
seconds.
When switched on the battery status, the length
the hose is extended, the direction the hose was
last moved (
▲ extend or ▼ retract) as well as the
unit of measurement used to display the length
are shown on the display.
NOTE!
The digital meter counter switches off automatical-
ly after 3 minutes if neither the hose is moved nor
the control button is pressed on the viper. When it
is switched on again the position 0.0 is displayed.
5.2 Selecting the unit
of measurement It is possible to choose between the units of
measurement meters (m) and feet (ft). The last
unit selected is always displayed when the device
is switched on.

To change the unit of measurement you must
first switch off the device.

Press and hold the control button for approx.
10 seconds until the new unit is shown in the
display.
5.3 Zeroing

To reset the extended length measurement to
0.0 press the control button briefly.
NOTE!
To ensure you are able to read precisely the
length the hose is extended into the duct, we rec-
ommend you zero the display when the beginning
of the hose is inserted into the duct.