User manual

18 GMC-I Messtechnik GmbH
Control Functions
4 Control Functions
4.1 Selecting Measuring Functions and Measuring Ranges
The desired measuring function (white symbols) is selected with
the rotary switch. Double functions like Hz and continuity testing
are selected with the OUT | ENTER key.
4.1.1 Automatic Range Selection
The multimeter is equipped with auto-ranging for all measuring
functions except for temperature measurement, and diode and
continuity testing. Auto-ranging is active as soon as the
instrument is switched on. The instrument automatically selects
the measuring range which allows for highest possible resolution
of the applied quantity. When the instrument is switched to
frequency measurement, the previously selected voltage
measuring range remains active.
AUTO-Range Function
The multimeter is switched automatically to the next higher range
at (30,999 d + 1 d 31,000 d) and to the next lower range at
(2700 d - 1 d  2699 d).
Exception, capacitance measurement:
The multimeter is switched automatically to the next higher range
at (3099 d + 1 d 310 d) and to the next lower range
at (270 d - 1 d  2699 d).
4.1.2 Manual Measuring Range Selection
Auto-ranging can be deactivated and measuring ranges can be
selected manually in accordance with the following table by
pressing the MAN / AUTO button.
The desired measuring range can then be selected with the
 or
 scroll key.
The instrument is automatically returned to range selection when
the MAN / AUTO key is pressed, the rotary switch is activated or the
instrument is switched off and back on again.
Overview: Auto-Ranging and Manual Range Selection
* Via manual measuring range selection only
** The momentary measured value is used as a reference point during zero
balancing, and is subtracted from future measured values.
Maximum correction is 50% of the measuring range. If the measuring
range is changed with the help of the MAN key, the ZERO function
remains active (at the display and in memory).
Note
Use short or shielded measurement cables in case of
high-impedance resistance (3 M or 30 M range).
Function Display
MAN / AUTO
Manual mode active:
Utilized measuring range is fixed
MAN
 or 
Range switching sequence for:
V

: 60 mV*  300 mV*  3 V  30 V  300 V
Hz: 300 Hz
 3 kHz  30 kHz  300 kHz


: 300   3 k   30 k  300 k  3 M  30 M 
A

: 300  A  3 mA  30 mA  300 mA
F:
30 nF  300 nF  3  F  30  F  300  F 
MAN
MAN / AUTO Return to automatic measuring range selection —