User Manual

GMC-I Gossen-Metrawatt GmbH 21
Control Functions
4.4 Measured Value Storage: DATA (auto-hold / compare)
An individual measured value can be automatically “frozen” with
the DATA function (auto-hold). This is useful, for example, when
contacting the measuring points with the test probes requires
your full attention. After the measuring signal has been applied
and the measured value has settled in in accordance with the
“condition” listed in the table below, the measured value is frozen
at the digital display and an acoustic signal is generated. The test
probes can now be removed from the measuring points, and the
measured value can be read from the digital display. If the
measuring signal falls below the value specified in the table, the
function is reactivated for storage of the next value.
Measured Value Comparison (DATA Compare)
If the currently frozen value deviates from the first saved value by
less than 100 digits, the acoustic signal is generated twice. If
deviation is greater than 100 digits, only a brief acoustic signal is
generated.
Note

The DATA function has no effect on the analog display, at
which the current measured value continues to appear.
However, when the digital display if “frozen”, the decimal
point is fixed as well (fixed measuring range, symbol:
MAN).
The selected measuring range should not be manually
changed as long as the DATA function is active.
The DATA function is deactivated by pressing and holding the
DATA/MIN/MAX key (for approx. 1 second), when the measuring
function is changed or when the instrument is switched off and
back on again.
1)
Reactivation results from falling short of specified measured value limits.
2)
Two acoustic signals are generated the first time a measured value is
saved as a reference value. For subsequent data hold, two acoustic
signals are only generated if the currently frozen value deviates from the
first saved value by less than 100 digits.
Key: MV = measured value, R = measuring range
DATA
Function
Press
DATA /
Min/Max
Condition Response from Instrument
Measuring
Function
Measuring
Signal
Display
Acoustic
MV
Digital
DATA
Activate Brief blinks Once
Save
(stabilized
measured
value)
V, A, F, Hz,
MHz, %
> 10%
of R
Is dis-
played
Static
Once
Twice
2)
Ω
≠ 0L
Reactivate
1)
V, A, F, Hz,
MHz, %
< 10%
of R
Stored
MV
Blinks
Ω
= 0L
Change to
Min/Max
Brief See table in chapter 4.4.1
Exit Long
Is cleared Is cleared Twice
V, A, Hz
t [s]
100%
10%
Activated
Reactivated
Save
Save
10,000 digits
of measuring range
F, MHz, %