Hioki DM7275 Series - X84; Storage of Measurement Data in the Instruments Internal Memory

42
Starting Measurement
Storageofmeasurementdataintheinstrument’sinternalmemory
Measured values are always stored in the instrument’s internal memory, which is structured as a
ring buffer. Once all 5000 spaces in the internal memory are occupied by measured values, the
oldest measured value will be deleted and replaced with the most recent measured value starting
with the next measurement.
Empty
DATA
1
DATA
2
DATA
4999
DATA
1
DATA
2
DATA
4999
DATA
5000
DATA
2
DATA
4999
DATA
5000
DATA
5001
The contents of the instrument’s internal memory can be checked using the trend display (p. 43,
p. 45). To check values in a more detailed manner, output the data to a computer and use a
spreadsheet or other software to open it.
IMPORTANT
The instrument’s internal memory is erased at the following times:
• When the instrument is reset
• When a panel is loaded
• When CLR is touched on the Trend Display screen
• When the memory is cleared using a remote command
• When the
:INITIATE:IMMEDIATE
command or the
:READ?
query is used
• When the instrument is turned off
Tooutputdatafromtheinstrument’sinternalmemory
• Measurement data stored in the instrument’s internal memory can be output to a USB ash
drive. See “10 Using a USB Flash Drive” (p. 115) , “Outputting all measurement data”
(p. 119)
• Communications commands can be used to download measurement data to a programmable
controller or computer. See “8 Preparing to Use USB, RS-232C, GP-IB, and LAN Control”
(p. 97)
• Use the data output function to output the most recent measured value. See “9 Outputting
Data” (p. 111)
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