Operation Manual

8 GMC-I Messtechnik GmbH
Disabling Automatic Shutdown
The instrument can be switched to “CONTINUOUS ON”.
➭ Press the FUNC key while switching the instrument on with the toggle switch
until an acoustic signal is generated. The “CONTINUOUS ON” function
is indicated at the display with the symbol.
3 Selecting Measuring Functions and Measuring Ranges
3.1 Automatic Measuring Range Selection
The multimeter is equipped with auto-ranging for all measuring ranges except for
temperature measurement, diode and continuity testing. Auto-ranging is always
activated as soon as the instrument is switched on. Depending upon the mea-
sured quantity, the device automatically selects the measuring range which
allows for best possible resolution.
The instrument automatically switches to the next highest or next lowest
measuring range for the following measured quantities:
3.2 Manual Measuring Range Selection – MAN/AUTO Key
Auto-ranging can be deactivated and ranges can be set manually in accordance
with the following table.
The manual mode is deactivated by pressing and holding the MAN/AUTO key for
about 1 s, by turning the rotary switch or by switching the instrument off and
back on again.
Measuring Ranges Resolution
Switching to the next
highest range occurs
at(... d + 1 d)
Switching to the next
lowest range occurs
1)
at (... d –1 d)
V , V , A , mA ,
A, , 30 mF, Hz,
4 ¾ 31 000 2 800
30 nF  300 F 3 ¾ 3 100 280
Key
MAN/AUTO
Function
Acknowledgement
Visual Acoustic
brief Manual mode active: utilized measuring range is fixed MAN 1 x
brief
Switching sequence for:
V: 300 mV  3V 30 V  300 V  600 V  300 mV 
A: 300 A  3mA 30 mA  300 mA  3A 10 A 
300 A 
:30M 30  300 3k 30 k300k
3M30 M
F: 30 nF  300 nF  3 F  30 F  300 F  30 nF 
Hz: 300 Hz  3kHz  30 kHz  300 kHz  1MHz  300 Hz 
: 3.0000 30.000 300.00 3.0000 
MAN 1 x
long Return to automatic measuring range selection — 2 x