Min/Max Measurement; Maintenance; Cleaning; Changing The Battery - Unitest CHB 5 Bedienungsanleitung

5.9

MIN/MAX Measurement

The MIN/MAX button can be used to find either the largest or the smallest value of
a series of measurements. Pressing the MIN/MAX button activates first the MIN
mode, so that the smallest value is selected. Pressing it a second time changes to
MAX mode, for the largest value. Pressing the button a third time returns the instru-
ment to normal operation..
6.0

Maintenance

Provided it is used in accordance with the users manual, the instrument needs no
special maintenance.
6.1

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 instru-
ments connected (such as UUT, control instruments, etc.).Never use acid detergents
or dissolvants for cleaning
6.2

Changing the battery

Prior to storage battery replacement, disconnect the instrument from any
circuits.
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 Meterman Current Clamp AC50 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 cor-
rect. 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.
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