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Gossen Metrawatt METRAHIT ULTRA BT Manual

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24 GMC-I Messtechnik GmbH
Control Functions
4.5 Measurement Data Recording
The instrument is capable of recording measurement data using
an adjustable sampling rate for long periods of time in the form of
measurement series. Data are stored to permanent memory, and
are retained even after the multimeter is switched off, and after
battery replacement. The system acquires measured values rela-
tive to real-time.
Stored measured values can subsequently be read out at the
computer. The only prerequisite is a PC which is connected by
means of an interface cable to the USB X-TRA bidirectional inter-
face adapter, which is plugged onto the METRAHIT ULTRA.
See also section 7, “Interface Operation”.
4.5.1 Long-Term Recording
Preparing for Recording – Parameter Settings
Ð First set the sampling rate for memory mode operation (see rAtE
parameter on page 53).
Ð Set hysteresis for efficient use of available memory space. Dur-
ing memory mode operation, new measured data are only
saved if they deviate from the previously stored value by an
amount which exceeds the selected hysteresis value (see
“hyst” parameter on page 53).
Ð Adjust “t.StorE” (see page 54) in order to limit recording dura-
tion.
Ð First select the desired measuring function and an appropriate
measuring range.
Ð Check the battery charge level before starting long-term mea-
surement recordings (see section 9.2).
Connect the NA X-TRA power pack if required.
Memory Parameters Overview
Starting Recording via Menu Functions
Ð Switch to the “SETUP” mode by pressing MEASURE | SETUP and
select the “StorE” menu.
1nFo
... StorE Store off StArt
Ð Memory mode operation is started by acknowledging with
FUNC | ENTER. STORE appears in the header and indicates that the
memory mode has been activated. “Store” appears at the main
display. If trigger conditions are activated,
TRIG also blinks in the
header.
Ð Press the MEASURE | SETUP key in order to return to the measur-
ing function.
Parameter Page: header
CLEAr
25: Clear Memory
EMpty
25: Clear Memory – appears after CLEAr
Hyst
53: HYSt – Hysteresis (parameter for memory mode operation)
0CCvP
25: Querying Memory Occupancy
rAtE
53: rAtE – Set Transmission and Storage Rate
StArt
24: Starting Recording via Menu Functions
StoP
25: Ending Recording
trig
54: triG – Trigger Conditions (parameters for memory mode operation)
tstore
54: tStorE – Recording Time (parameter for memory mode operation)
MEASURE
SETUP
FUNC
ENTER
FUNC
ENTER
… 24 …


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