PANCONTROL PAN MV-690A Manual De Instrucciones página 25

Calibration
The voltage tester must be calibrated by the service regularly to ensure
accuracy.
We recommend an annual calibration.
Cleaning
If the instrument is dirty after daily usage, it is advised to clean it by using a
humid cloth and a mild household detergent. Prior to cleaning, ensure that
instrument is switched off and disconnected from external voltage supply and
any other instruments connected. Never use acid detergents or dissolvent for
cleaning.
EN 11