Hameg HM8012 Handbuch Seite 25

(6) HOLD (LED)
Indicator denoting that the displayed value has
been frozen. The function can be activated using
key (11). Deactivation is by pressing the HOLD/
OFFSET key.
(7) 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.
CAUTION! For safety reasons, the
voltage across this terminal compared
to the case (guard wire, ground) shall
be 500 V at most.
(8) OFFSET (LED)
Indicator denoting that the displayed value is a
relative measurement. The displayed value
corresponds to the input value less the value
present on the display during initial action on the
HOLD/OFFSET key (11). Activate this function by
means of a second press on the HOLD/OFFSET
key.
(9) V/Ω Ω Ω Ω Ω /T°/dB/
banana plugs)
Connection (high potential) for measurements of
voltages, resistances, temperatures and diode
junctions in conjunction with the COM input (7)
(safety terminal).
CAUTION! For safety reasons, the
voltage across this terminal compared
to the case (guard wire, ground) shall
be 1,000 V at most.
(10) HOLD/OFFSET (pushbutton)
Pushbutton for validating the HOLD or OFFSET
26
(safety terminal for 4 mm
functions. Pressing the key the first time will
freeze the front panel display. The HOLD indicator
(6) then comes on. The AUTO, AC-DC, BEEP,
and keys are inoperative.
A second press gives access to the relative mode.
The value memorized by the HOLD function is
then subtracted from each measurement before
being displayed. The OFFSET indicator (8) comes
on.
A third press will freeze the relative value. The
HOLD (6) and OFFSET (8) indicators come on. A
fourth press will delete the HOLD and OFFSET
mode.
NOTE: When the HOLD/OFFSET mode is
engaged, pressing the
return to the normal mode. Further, the manual
mode is set on for HOLD and OFFSET functions.
(11) (pushbutton)
Pushbutton for changing to lower range. On each
press, the new range is displayed fleetingly on
the display in code form (L1 for lowest range, L2
for second range, etc.).
(12) (pushbutton)
Pushbutton for changing to higher range. Each
time pressed, the new range will be displayed
fleetingly on the display in code form (L1 for
lowest range, L2 for second range, etc.).
(13) RS232 (DB9)
Female DB9 connector intended for serial
communication.
(15) AUTO (LED)
Indicator signalling that the multimeter is in
AUTOMATIC mode. In this mode, action on keys
(12) and (13) is inoperative and transmits an
audible beep.
or key will provoke
Subject change without notice