Control Elements - Hameg Instruments HM8012 Manuel

C o n t r o l - E l e m e n t s
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Control-Elements
DISPLAY (7-segment LED + LED)
The digital display shows the measurement value
with 4¾ digit resolution, in which the largest fi -
gure is used up to "5". It will also display various
warning messages. The measurement value will
be displayed with decimal points and polarity sign.
For DC measurement, a minus sign will appear
in front of the fi gures when the positive polarity
of the measured value is connected to the COM
input .
(LED)
Indicator denoting validation of the audible con-
tinuity test signal. When used as an ohmmeter,
the audible signal triggers when the measured
resistance value is less than 0.1% of the range
or 50 counts. For other functions, the indicator
is hidden.
BEEP (pushbutton)
Pushbutton for activating the audible signal.
A (safety terminal for 4 mm banana plugs)
Connection (high potential) for DC and AC
current measurements in the 10 A range in con-
junction with the COM input
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Subject to change without notice
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(low potential).
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Current in excess of 10 A (max. 20 A) must
not be applied for a period exceeding 30
s, otherwise the internal measurement
resistor thermal device will blow.
mA (safety terminal for 4 mm banana plugs)
Connection (high potential) for DC and AC current
measurements up to 500 mA in conjunction with
COM input (low potential). The input is fuse-
protected.
HOLD (LED)
Indicator denoting that the displayed value has
been frozen. The function can be activated using
key . Deactivation is by pressing the HOLD/
OFFSET key.
COM (safety terminal for 4 mm bana plugs)
The COM terminal (low potential) is the common
connector for all the measurement functions to
which the potential close to the ground of the
measured quantity will be applied.
For safety reasons, the voltage across
this terminal compared to the case (guard
wire, ground) shall be 250 V at most.
OFFSET (LED)
Indicator denoting that the displayed value is a
relative measurement. The displayed value cor-
responds to the input value less the value present
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