User Manual

GMC-I Messtechnik 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
in the top left section of the auxiliary display as well as the associ-
ated „freeze time“ in the top right section and an acoustic signal is
generated. The test probes can now be removed from the mea-
suring points, and the measured value can be read from the digi-
tal 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

However, when the digital display is “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 (approx. 1 second), when the measuring func-
tion 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 sig-
nals are only generated if the currently frozen value deviates from the first
saved value by less than 100 digits.
Key: MV = measured value, MR = measuring range
DATA
Function
Data/
Min/Max
Key
Condition Response from Instrument
Measuring
Function
Measuring
Signal
Auxiliary Display Acous-
tic Sig-
nal
top left top right
Activate Brief Once
Save
(stabilized
measured
value)
V, A, F, Hz,
> 10%
rdg.
frozen
MV is
indicated
„Freeze
time“ is
indicated
Once
Twice
2)
RTD TC Ω
≠ 0L
Reactivate
1)
V, A, F, Hz,
< 10%
rdg.
Stored
MV
RTD TCΩ
= 0L
Change to
Min/Max
Brief See table, section 4.4.1
Exit Long
Is deleted Is deleted Twice
V, mA, Hz
t [s]
100%
10%
Activated
Reactivated
Save
Save
30,000 Digits
of Measuring Range
F
31,000 Digits OL