Problem
Possbile cause
Suggested solution
Cannot measure
changes in value.
Is the wrong measuring
function activated (AC/
DC)?
Check display (AC/DC) and switch
the function if required.
Are the incorrect leads
used?
Check the terminal assignment or
connection of the probe leads.
Is the HOLD function
activated?
Deactivate the HOLD function.
No measurement
possible in the A
measurement range
Is the fuse of the A meas-
uring range defective?
Check the 10 A F1 fuse
No measurement
possible in the mA/
µA measurement
range
Is the fuse of the mA/
µA measurement range
defective?
Check the 0.6 A F2 fuse.
15. Cleaning and maintenance
a) Cleaning
Do not use aggressive cleaning agents, rubbing alcohol or other chemical solutions as
they can cause damage to the housing and malfunctioning.
• Disconnect the product from the mains before each cleaning.
• Clean the product with a dry, fibre-free cloth.
• If there is any malfunction, stop using the meter and send it for maintenance. Maintenance
and service must only be carried out by qualified professionals.
b) Maintenance
• The DMM should be calibrated once a year for maximum accuracy.
• The DMM does not require maintenance other than battery and fuse replacement.
• Check the device and measuring lines for signs of wear and damage.
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