Maintenance; Cleaning; Changing The Battery - BEHA UNITEST CHB 3 Mode D'emploi

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Operation / Maintenance
5.5 MIN/MAX and peak values
The MIN/MAX button can be used to find either the largest
or the smallest value of a series of measurements. Press-
ing 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 instrument to normal oper-
ation.

6.0 Maintenance

Provided it is used in accordance with the Instruction Man-
ual, 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 deter-
gent.
Prior to cleaning, ensure that instrument is switched off and
disconnected from external voltage supply and any other in-
struments connected (such as UUT, control instruments,
etc.).
Never use acid detergents or dissolvants for cleaning.

6.2 Changing the battery

If the symbol for Battery appears in the upper left corner of
the display, the battery must be changed.
This is carried out as follows:
Separate the UNITEST Clamp Meter CHB 3 from any
circuit, and remove the test leads.
Switch the instrument off
Open the housing by removing the 3 screws on the
rear face.
Remove the old battery
Fit a new battery (type 9 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.
The instrument is now ready for further use.
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