Maintenance
Provided it is used in accordance with the user manual, the instrument
needs no special maintenance.
Cleaning
If the instrument is dirty after daily usage, clean it by using a humid cloth
and a mild household detergent.
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Prior to cleaning, ensure that instrument is switched off and dis-
connected from external voltage supply and any other instruments
connected (such as UUT, control instruments, etc.).
Never use acid detergents or dissolvents for cleaning.
Changing the battery
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P rior to storage battery replacement, disconnect the instrument
from any circuits.
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Only use batteries as described in the technical data section.
• If the symbol for Low-battery appears in the upper left corner of the
display, the battery must be changed.
This is carried out as follows:
1) Separate the AC50A from any circuit, and remove the test leads.
2) Switch the instrument off.
3) Open the housing by removing the 3 screws on the rear face.
4) Remove the old batteries.
5) Fit the new batteries (2 type 1.5 V IEC LR6), taking care that the polarity
is correct. Make sure that no wires are trapped between the 2 halves
of the housing, and close it again.
6) The instrument is now ready for further use.
Please consider your environment when you dispose of your one-way
batteries or accumulators. They belong in a rubbish dump for hazardous
waste. In most cases, the batteries can be returned to their point of sale.
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P lease, comply with the respective valid regulation regarding the return,
recycling and disposal of used batteries and accumulators.
If an instrument is not used over an extended time period, the batteries
must be removed. Should the instrument be contaminated by leaking
battery cells, the instrument has to be returned for cleaning and inspec-
tion to the factory.
Calibration Interval
We suggest a calibration interval of one year. If the instrument is used
very often or if it is used under rough conditions we recommend shorter
intervals. If the instrument is used only a few times a year, the calibration
interval can be extended to 3 years.
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