MEASure:CAPacitance? [{<range>|AUTO|MIN|MAX|DEF}, [{<resolution>|MIN|MAX|DEF},]]
(@<ch_list>)
Only supported on DAQM901A, DAQM902A, and DAQM908A multiplexer modules.
Resets all measurement parameters on the specified channels to their default values. Then, configures the channels
for capacitance measurements and immediately sweeps through the specified channels one time (independent of
the present scan list). The results are sent directly to reading memory and the instrument's output buffer. This com-
mand redefines the scan list.
Parameter Typical return
<range> = { 1 nF | 10 nF | 100 nF | 1 µF |10 µF |100 µF }.
Default: AUTO.
(none)
<resolution> = Optional and ignored; fixed at 4½ digits
Configures a default capacitance measurements on channel 101:
MEAS:CAP? (@101)
Typical response: +3.01574316E-10
– You can let autoranging select the measurement range, or you can manually select a fixed range. Autoranging
conveniently selects the range for each measurement based on the input signal. For fastest measurements, use
manual ranging (autoranging may require additional time for range selection).
– Autoranging (AUTO or DEFault), will generate an error if you specify a <resolution> because the instrument can-
not accurately resolve the integration time (especially if the input continuously changes). If your application
requires autoranging, specify DEFault for the <resolution> or omit the <resolution> altogether.
– Autoranging goes down a range at less than 10% of range and up a range at greater than 120% of range. For
capacitance measurements only, when autorange is off, the instrument does not report an overload for readings
greater than 120% of range. Overload only occurs when the algorithm times out because the applied capa-
citance is too large for the algorithm to measure. If you apply a DC voltage or a short to the input terminals in
capacitance measurement mode, the instrument reports an overload.
– If the input signal is greater than can be measured on the specified manual range, the instrument displays the
word Overload on front panel and returns "9.9E37" from the remote interface.
Keysight DAQ970A/DAQ973A Programming Guide 165
2 SCPI Programming
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