Measurement operation
The PCR-M panel display operates as a monitor. It displays the present value that is being delivered to the load.
If you are using the PCR-M series with firmware version 1.19 or earlier, see here.
If the measurement is not complete immediately after sending the INIT:SEQ3/INIT:NAME ACQ command or immediately after a MEAS query, the response data to an FETC/MEAS query is generated after the measurement is complete.
- FETCh subsystem Tutorial
FETC? queries the measured data without starting the measurement operation.
If FETC? is sent without making a measurement in advance, a SCPI error (-230,"Data corrupt or stale") occurs, because there is no valid measured data. Be sure to use this command with the INIT command.
Because this command queries the value when the measurement operation was carried out, the response value may be different from the value displayed on the panel.
- MEASure subsystem Tutorial
Queries the measured data after starting a new measurement operation.
MEAS? is equivalent to combining the INIT command and FETC? query.
- Measurable items
The measurable items vary depending on the output mode.
Table 6 Measurable Items
Command | Output Mode | Function | ||||
AC | DC | AC+DC | EXT-AC | EXT-DC | ||
FETC:CURR:DC MEAS:CURR:DC |
Yes | Yes | Yes | Average DC current | ||
FETC:CURR:AC MEAS:CURR:AC |
Yes | Yes | Yes | Yes | AC current | |
FETC:CURR:AMPL:MAX MEAS:CURR:AMPL:MAX |
Yes | Yes | Yes | Yes | Yes | Current peak |
FETC:CURR:AMPL:MAX:HOLD MEAS:CURR:AMPL:MAX:HOLD |
Yes | Yes | Yes | Yes | Yes | Current peak (held value) |
FETC:FREQ MEAS:FREQ |
Yes*1 | Yes*2 | Yes*1 | Yes*1 | Yes*1 | Frequency |
FETC:POW:DC MEAS:POW:DC |
Yes | Yes | Yes | DC power | ||
FETC:POW:AC MEAS:POW:AC |
Yes | Yes | Yes | Yes | AC power (active power) |
|
FETC:POW:AC:APP MEAS:POW:AC:APP |
Yes | Yes | Yes | Yes | AC power (apparent power) |
|
FETC:POW:AC:REAC MEAS:POW:AC:REAC |
Yes | Yes | Yes | Yes | AC power (reactive power) |
|
FETC:POW:AC:PFAC MEAS:POW:AC:PFAC |
Yes | Yes | Yes | Yes | Power factor of AC power | |
FETC:VOLT:DC MEAS:VOLT:DC |
Yes | Yes | Yes | Yes | DC voltage | |
FETC:VOLT:AC MEAS:VOLT:AC |
Yes | Yes | Yes | Yes | AC voltage |
*1. Returns the frequency setting in response to FETC:FREQ?/MEAS:FREQ?.
*2. Returns 0 in response to FETC:FREQ?/MEAS:FREQ?.
Queries the average measured current of the DC current output. Set the averaging period using SENS:AVER.
Command
FETCh[:SCALar]:CURRent:DC?
MEASure[:SCALar]:CURRent:DC?
Effective output modes DC, AC+DC, and EXT-DC
Response
Returns the measured value of the DC current output in the NR3 form in response to FETC:CURR:DC?/MEAS:CURR:DC?.
Unit: A
Sets the averaging period of the measured values (excluding the peak current).
Command
SENSe:AVERage[:STATe] {ON|OFF|1|0}
SENSe:AVERage[:STATe]?
Parameter
Value: | ON(1) | Displays the moving average over approximately 3 seconds |
OFF(0) | Update every approximately 0.3 seconds (default) |
Response
Returns the averaging period of measured values in the NR1 form.
Queries the measured value of the AC current output.
Command
FETCh[:SCALar]:CURRent:AC?
MEASure[:SCALar]:CURRent:AC?
Effective output modes AC, AC+DC, EXT-DC, and EXT-AC
Response
Returns the measured value of the AC current output in the NR3 form in response to FETC:CURR:AC?/MEAS:CURR:AC?.
Unit: A (RMS)
FETC:CURR:AMPL:MAX/MEAS:CURR:AMPL:MAX
Queries the peak measured value of the current output. Set the hold time using SENS:HOLD.
Command
FETCh[:SCALar]:CURRent:AMPLitude:MAXimum[:INSTant]?
MEASure[:SCALar]:CURRent:AMPLitude:MAXimum[:INSTant]?
Effective output modes All output modes
Response
Returns the peak measured value of the current output in the NR3 form in response to FETC:CURR:AMPL:MAX?/MEAS:CURR:AMPL:MAX?.
Unit: A (PEAK)
Sets the hold time of the peak current.
Command
SENSe:HOLD {SHORt|LONG}
SENSe:HOLD?
Parameter
Value: | SHORt | Update every approximately 0.3 seconds (default) |
LONG | Hold the peak value for approximately 5 seconds |
Response
Returns the hold time of the peak current.
FETC:CURR:AMPL:MAX:HOLD/MEAS:CURR:AMPL:MAX:HOLD
Queries the peak value (held value) of the AC current output.
The peak value can be cleared using SENS:CURR:PEAK:CLE.
Command
FETCh[:SCALar]:CURRent:AMPLitude:MAXimum:HOLD?
MEASure[:SCALar]:CURRent:AMPLitude:MAXimum:HOLD?
Effective output modes All output modes
Response
Returns the peak value of the AC current output in the NR3 form in response to FETC:CURR:AMPL:MAX:HOLD?/MEAS:CURR:AMPL:MAX:HOLD?.
Unit: A (PEAK)
Clears the peak hold of the current measurement.
Command
SENSe:CURRent:PEAK:CLEar
Queries the AC output frequency setting.
Command
FETCh[:SCALar]:FREQuency?
MEASure[:SCALar]:FREQuency?
Effective output modes DC, AC, AC+DC, EXT-AC, and EXT-DC
Response
Returns the AC output frequency setting in the NR3 form if the OUTPut:COUPling is set to AC or AC+DC in response to FETC:FREQ?/MEAS:FREQ?. Returns 0 if set to DC. (The PCR-M does not measure the frequency.)
Unit: HZ
Queries the measured value of the DC power.
Command
FETCh[:SCALar]:POWer:DC?
MEASure[:SCALar]:POWer:DC?
Effective output modes DC, AC+DC, and EXT-DC
Response
Returns the measured value of the DC power in the NR3 form in response to FETC:POW:DC?/MEAS:POW:DC?.
Unit: W
Queries the measured value of the active AC power.
Command
FETCh[:SCALar]:POWer:AC[:REAL]?
MEASure[:SCALar]:POWer:AC[:REAL]?
Effective output modes AC, AC+DC, EXT-DC, and EXT-AC
Response
Returns the measured value of the active AC power in the NR3 form in response to FETC:POW:AC?/MEAS:POW:AC?.
Unit: W
FETC:POW:AC:APP/MEAS:POW:AC:APP
Queries the measured value of the apparent AC power.
Command
FETCh[:SCALar]:POWer:AC:APParent?
MEASure[:SCALar]:POWer:AC:APParent?
Effective output modes AC, AC+DC, EXT-DC, and EXT-AC
Response
Returns the measured value of the apparent AC power in the NR3 form in response to FETC:POW:AC:APP?/MEAS:POW:AC:APP?.
Unit: VA
FETC:POW:AC:REAC/MEAS:POW:AC:REAC
Queries the measured value of the reactive AC power. If we denote the apparent power and active power as S and P, respectively, reactive power Q is expressed by the following equation.
Command
FETCh[:SCALar]:POWer:AC:REACtive?
MEASure[:SCALar]:POWer:AC:REACtive?
Effective output modes AC, AC+DC, EXT-DC, and EXT-AC
Response
Returns the measured value of the reactive AC power in the NR3 form in response to FETC:POW:AC:REAC?/MEAS:POW:AC:REAC?.
Unit: VAR
FETC:POW:AC:PFAC/MEAS:POW:AC:PFAC
Queries the power factor of the AC power. If we denote the apparent power and active power as S and P, respectively, power factor PF is expressed by the following equation.
PF = P / S
Command
FETCh[:SCALar]:POWer:AC:PFACtor?
MEASure[:SCALar]:POWer:AC:PFACtor?
Effective output modes AC, AC+DC, EXT-DC, and EXT-AC
Response
Returns the power factor of the AC power in the NR3 form in response to FETC:POW:AC:PFAC?/MEAS:POW:AC:PFAC?.
Queries the measured value of the DC voltage output.
Command
FETCh[:SCALar]:VOLTage:DC?
MEASure[:SCALar]:VOLTage:DC?
Effective output modes DC, AC+DC, EXT-DC, and EXT-AC
Response
Returns the measured value of the DC voltage output in the NR3 form in response to FETC:VOLT:DC?/MEAS:VOLT:DC?.
Unit: V
Queries the measured value of the AC voltage output.
Command
FETCh[:SCALar]:VOLTage:AC?
MEASure[:SCALar]:VOLTage:AC?
Effective output modes AC, AC+DC, EXT-DC, and EXT-AC
Response
Returns the measured value of the AC voltage output in the NR3 form in response to FETC:VOLT:AC?/MEAS:VOLT:AC?.
Unit: V (RMS)
FETC:CURR:CREST/MEAS:CURR:CREST
Queries the measured value of the crestfactor. Crestfactor is expressed by the following equation.
Crestfactor = AC current / AC peak current
Command
FETCh:CURRent:CREStfactor?
MEASure:CURRent:CREStfactor?
Effective output modes AC, AC+DC, EXT-DC, and EXT-AC
Response
Returns the measured value of the crestfactor in the NR3 form in response to FETC:CURR:CREST?/MEAS:CURR:CREST?.