Adjustment Procedure - Hameg HM 8012 Handbuch

c) DC current ranges
d) AC current ranges (f = 400 Hz)
e) Resistor ranges
Calibration
Calibration of the HM 8012 digital multimeter is
performed mainly by software. In order to enter
the calibration menu keep both pushbuttons AUTO
(15) and BEEP (3) depressed until the message
CAL is displayed. After the release of both
pushbuttons the first calibration step will be
indicated. First the unit will be shown then the
value of the calibration voltage etc. which has to
be applied to the instrument. In this mode the
following pushbuttons will function as given:
Subject change without notice
Pushbutton Action
AUTO (15) Corrected value of the range
selected if LED (2) is on, otherwise
the input of the preceding step will
be displayed.
BEEP (3) Displays not yet calibrated values.
LED (2) will be on, the value can be
changed by pushbutton (15).
(12) Changeover to the following
calibration step.
(11) Changeover to the preceding
calibration step.
AC+DC (17) Stores the calibrated values.
Calibration procedure
1. Apply the calibration value specified.
2. Press BEEP (3). The former not yet corrected
value will be displayed. LED (2) will be on.
3. Press AUTO (15) to perform the calibration, the
corrected value should be displayed.
4. Press (12) in order to proceed. (Pressing
(12) will display the actual calibration infor-
mation without moving to another step.)
Please note:
In order to guarantee a fully calibrated
instrument be sure to perform a complete
calibration cycle.
Hints:
Pressing just the AUTO (15) pushbutton without
the BEEP (3) pushbutton will display the value
resulting from the preceding calibration; in case
it is correct no recalibration will be necessary.
Pressing AUTO (15) again will return the
instrument to the menu. Pressing either
the next or the last calibration step will be
accessed.
For precise resist ance calibration it is
necessary to connect the calibration resistors
as closely to the input terminals as possible.
Pressing the AC/DC (17) pushbutton will store
the calibrated values.
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