Measured Value Storage: Data (Auto-Hold / Compare) - Gossen MetraWatt METRAHIT PM TECH Operating Instructions Manual

Control Functions

6.4 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.
19
V, A, Hz dB, F, MHz, %
of measuring range
60,000
d
5,000
d
Save
Reactivated
Activated
DATA Press
Measuring
Function DATA /
Function
Min/Max
Activate Brief
V, A, Hz, dB,
Save
F, MHz, %
(stabilized
measured

value)
V, A, Hz, dB,
F, MHz, %
1)
Reactivate

Change to
Brief
Min/Max
Exit Long
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
t [s]
Save
Condition Response from Instrument
Display
Measuring
MV
Signal
DATA
Digital
blinks
> 10%
of R
Is dis-
Static
played
0L
< 10%
of R
Stored
Blinks
MV
= 0L
See table in chapter 6.4.1
Is cleared Is cleared
Gossen Metrawatt GmbH
Acous-
tic
Once
Once
2)
Twice
Twice