[SENSe:]TEMPerature:NPLCycles {<PLCs> | MIN | MAX | DEF} [, (@<ch_list>)]
[SENSe:]TEMPerature:NPLCycles? [{(@<ch_list>) | MIN | MAX | DEF}]
Sets the integration time in number of power line cycles (PLCs) for temperature measurements. Integration time is
the period that the instrument's analog-to-digital (A/D) converter samples the input signal for a measurement. A
longer integration time gives better measurement resolution but slower measurement speed.
Only supported in DAQM900A, DAQM901A, DAQM902A, and DAQM908A multiplexer modules.
Parameter Typical return
<PLCs>: {0.001 | 0.002 | 0.006 | 0.02 | 0.06 | 0.2 | 1 | 2 | 10 | 20 | 100 | 200} +1.00000000E+00
Configure temperature measurements using a 10 PLC integration time. Then make and read one measurement:
CONF:TEMP
TEMP:NPLC 10
READ?
Typical Response: +6.27530000E-01
– Only the integral number of power line cycles (1, 2, 10, 20, 100, or 200 PLCs) provide normal mode (line fre-
quency noise) rejection.
– Setting the resolution also sets the integration time for the measurement. The following table shows the rela-
tionship between integration time, and measurement resolution.
Integration time Resolution
0.001 PLC 0.000030 x Range
0.002 PLC 0.000015 x Range
0.006 PLC 0.000006 x Range
0.02 PLC 0.000003 x Range
0.06 PLC 0.0000015 x Range
0.2 PLC 0.0000007 x Range
1 PLC 0.0000003 x Range
2 PLC 0.00000022 x Range
10 PLC 0.0000001 x Range
20 PLC 0.00000008 x Range
100 PLC 0.00000003 x Range
200 PLC 0.000000022 x Range
– The specified integration time is used for all measurements on the selected channels. If you have applied mX+b
scaling or have assigned alarms to the selected channel, those measurements are also made using the specified
integration time. Measurements taken during the Monitor function also use the specified integration time.
260
Keysight DAQ970A/DAQ973A Programming Guide
2 SCPI Programming
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