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d) Resetting to the factory defaults
To reset the device to the factory defaults, turn off the device.
Press and hold the "RTD" (2) button and turn on the device. Press and hold both buttons until
you hear a beep. The device has been reset to the factory defaults.
The following settings are reset:
•
Voltage output mode
•
Automatic power-off after 30 minutes.
•
Display illumination to 60%
•
All output ranges (0%/100%)
10. Cleaning and maintenance
a) General information
The device should be calibrated once a year to ensure that measurements remain accurate
over a long period of time.
The device only needs occasional cleaning and battery change and otherwise requires no spe-
cial maintenance.
Attached you will find instructions on how to change the battery.
Regularly check the device and test leads for technical safety, for example, for signs
of damage to the housing or deformation, etc.
b) Cleaning
Always observe the following safety information before cleaning the device:
Opening covers on the product or removing parts that cannot be removed by hand
may expose voltage-carrying components.
Before cleaning or repairing, the leads must be disconnected from the device and all
test objects. Switch off the device.
Do not use abrasive detergents, petrol, alcohol or other similar chemicals to clean the device.
These may corrode the surface of the device. In addition, the vapours emitted by these sub-
stances are explosive and harmful to your health. Do not use sharp-edged tools, screwdrivers
or metal brushes to clean the device.
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