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Model 2790 SourceMeter
®
Switch System Reference Manual
FETCh?
READ?
FETCh? is similar to DATA[:LATest]? in that it can be used to return the last
reading. However, it can also be used to return more than one reading. When
returning more than one reading, the readings are automatically stored in the
buffer.
In order to return multiple reading strings, continuous initiation must be dis-
abled (INIT:CONT OFF) so that the sample count (SAMPle:COUNt), which
specifies the number of measurements to be performed, can be set >1. After
INITiate is sent to trigger the measurements, FETCh? will return the reading
strings.
In general, READ? performs an INIT to trigger measurements and then a
FETCh? to retrieve the reading strings. With continuous initiation disabled
(INITiate:CONTinuous OFF), you can use the READ? command to trigger
and return readings. The sample count determines the number of reading
strings to be returned. With the sample count >1, the returned readings are
automatically stored in the buffer.
klqb
When readings are stored in the buffer by the TRACe command (or
by front panel data store operation), INIT and multi-sample READ?
queries are locked out. A multi-sample READ? is defined as one
where the sample count is >1. With readings in the buffer that were
stored in that manner, you cannot use the INIT or READ? command
if sample count is >1 (error -225, out of memory). Buffer operation
is covered in
h.
TEMPerature:THERmistor <NRf> [,<clist>]
Parameter value settings:
Parameter value
1950 to 3499
3500 to 7499
7500 to 10050
Section
6.
Selected thermistor type
2250Ω
5000Ω
10kΩ
3-37
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