User Manual
GMC-I Messtechnik GmbH 17
Control Functions
The instrument is automatically returned to automatic 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
“Intelligent” MAN Function
If a small measurement value occurs, the instrument can be swit-
ched to a measuring range with higher resolution by pressing the
MAN / AUTO key.
Power and Energy Measurements
For power measurements, the momentary measuring ranges for
U and I can be locked in by pressing the MAN / AUTO key.
Locking is disabled by pressing the key once again.
Manual measuring range selection is not possible here.
Mains and Harmonic Analysis
The measuring range for mains analysis (switch position PQ) is
specified in the menu (Set > MAinS > rAnGE).
The measuring range for harmonic analysis can be selected as a
fixed setting in the menu (Set > HArM > U.rAnGE and Set > HArM
> I.rAnGE, clamp factor is not taken into consideration!), or auto-
ranging can be activated.
4.1.3 Peak Value Monitoring
for Automatic and Manual Measuring Range Selection
The peak value is measured in addition to RMS measurement in
the V / A DC, AC and AC+D functions, as well as for power mea-
surement. If the peak value exceeds the valid range of the corres-
ponding measuring path, the instrument is switched up one
range, even if the displayed measured value has not yet reached
the threshold value. If the momentary range is manually selected,
(-)OL is displayed.
This assures that, in these functions, measurement is always per-
formed in the correct range (e.g. during measurement of a signal
with a high crest factor or measurement of the DC component of
a mixed signal with a large AC component).
Function Display
MAN / AUTO
Manual mode active:
utilized measuring range is fixed
MAN
or
Range switching sequence for:
V DC:
60 mV*
↔
600 mV*
↔
6 V
↔
60 V
↔
600 V
V AC/AC+DC:
600 mV*
↔
6 V
↔
60 V
↔
600 V
Hz (V AC):
600 Hz
↔
6 kHz
↔
60 kHz
↔
600 kHz
MHz
600 Hz
↔
6 kHz
↔
60 kHz
↔
600 kHz
↔
1 MHz
Ω
:
600 W
↔
6 kW
↔
60 kW
↔
600 kW
↔
6 MW
↔
60 MW
A:
600 mA
↔
6 mA
↔
60 mA
↔
600 mA
↔
6 A
↔
10 A (16 A)
Hz (A AC):
600 Hz
↔
6 kHz
↔
60 kHz
↔
600 kHz
F:
60 nF
↔
600 nF
↔
6 mF
↔
60 mF
↔
600 mF
m:
6 km
↔
60 km
MAN
MAN / AUTO
Return to automatic measuring range selection —