[SENSe:]TEMPerature Subsystem

This subsystem configures temperature measurements.

Command Summary

[SENSe:]TEMPerature:APERture

[SENSe:]TEMPerature:APERture:ENABled

[SENSe:]TEMPerature:NPLC

[SENSe:]TEMPerature:NULL[:STATe]

[SENSe:]TEMPerature:NULL:VALue

[SENSe:]TEMPerature:NULL:VALue:AUTO

[SENSe:]TEMPerature:SECondary

[SENSe:]TEMPerature:TRANsducer:{FRTD|RTD}:OCOMpensated

[SENSe:]TEMPerature:TRANsducer:{FRTD|RTD}:POWer:LIMit[:STATe]

[SENSe:]TEMPerature:TRANsducer:{FRTD|RTD}:RESistance[:REFerence]

[SENSe:]TEMPerature:TRANsducer:{FTHermistor|THERmistor}:POWer:LIMit[:STATe]

[SENSe:]TEMPerature:TRANsducer:{FTHermistor|THERmistor}:TYPE

[SENSe:]TEMPerature:TRANsducer:TCouple:CHECk

[SENSe:]TEMPerature:TRANsducer:TCouple:RJUNction

[SENSe:]TEMPerature:TRANsducer:TCouple:RJUNction:OFFSet:ADJust

[SENSe:]TEMPerature:TRANsducer:TCouple:RJUNction:TYPE

[SENSe:]TEMPerature:TRANsducer:TCouple:TYPE

[SENSe:]TEMPerature:TRANsducer:TYPE

[SENSe:]TEMPerature:ZERO:AUTO

[SENSe:]TEMPerature:APERture {<seconds>|MIN|MAX|DEF}
[SENSe:]TEMPerature:APERture? [{MIN|MAX|DEF}]

Specifies the integration time in seconds (called aperture time) for temperature measurements.

Use this command for precise control of the DMM's integration time. Use NPLC (see [SENSe:]TEMPerature:NPLC) for better power-line noise rejection characteristics (NPLC > 1).

Parameter Typical Return

(Without the DIG option) 200 µs to 1 s (2 µs resolution), default: 100 ms. (With the DIG option)  20 µs to 1 s (2 µs resolution), default: 100 ms.

+1.00000000E-01

Enable aperture, set the aperture time to 300 ms:

TEMP:APER:ENAB ON
TEMP:APER 300E-03

[SENSe:]TEMPerature:APERture:ENABled {ON|1|OFF|0}
[SENSe:]TEMPerature:APERture:ENABled?

Enables the setting of integration time in seconds (called aperture time) for temperature measurements. If aperture time mode is disabled (default), the integration time is set in PLC (power-line cycles).

Parameter Typical Return
{ON|1|OFF|0}. Default: OFF. 0 (OFF) or 1 (ON)

Enable aperture time mode, set the aperture time to 300 ms:

TEMP:APER:ENAB ON
TEMP:APER 300E-03

[SENSe:]TEMPerature:NPLC {<PLC>|MIN|MAX|DEF}
[SENSe:]TEMPerature:NPLC? [{MIN|MAX|DEF}]

Sets the integration time in number of power line cycles (PLC) 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.

Parameter Typical Return
0.02, 0.2, 1, 10, 100. Default: 10 (34460A/61A)
0.02, 0.06, 0.2, 1, 10, 100. Default: 10 (34465A/70A without DIG option)
0.001, 0.002, 0.006, 0.02, 0.06, .2, 1, 10, 100. Default: 10 (34465A/70A with DIG option)
See Range, Resolution and NPLC for more information.
+1.00000000E+01

Configure 4-wire RTD measurements using a 10 PLC integration time. Then make and read one measurement:

CONF:TEMP FRTD
TEMP:NPLC 10
READ?

Typical Response: +6.27530000E+01

[SENSe:]TEMPerature:NULL[:STATe] {ON|1|OFF|0}
[SENSe:]TEMPerature:NULL[:STATe]?

Enables or disables the null function for temperature measurements.

Parameter Typical Return
{ON|1|OFF|0}. Default: OFF. 0 (OFF) or 1 (ON)

Configure 4-wire RTD measurements, using the null function to subtract 25°. Make and read two measurements:
CONF:TEMP RTD
TEMP:NULL:STAT ON
VAL 25;SAMP:COUN 2
READ?

Typical Response: +1.04530000E+00,+1.04570000E+00

[SENSe:]TEMPerature:NULL:VALue {<value>|MIN|MAX|DEF}
[SENSe:]TEMPerature:NULL:VALue? [{MIN|MAX|DEF}]

Stores a null value for temperature measurements.

Parameter Typical Return
-1.0E15 to +1.0E15. Default: 0. +2.50000000E+01

Configure 4-wire RTD measurements, using the null function to subtract 25°. Make and read two measurements:
CONF:TEMP RTD
TEMP:NULL:STAT ON
VAL 25;SAMP:COUN 2
READ?

Typical Response: +1.04530000E+00,+1.04570000E+00

[SENSe:]TEMPerature:NULL:VALue:AUTO {ON|1|OFF|0}
[SENSe:]TEMPerature:NULL:VALue:AUTO?

Enables or disables automatic null value selection for temperature measurements.

Parameter Typical Return
{ON|1|OFF|0}. Default: OFF. 0 (OFF) or 1 (ON)

Configure temperature measurements, using the null function to subtract 25° from them.  Make and read two measurements:
CONF:TEMP RTD
TEMP:NULL:STAT ON;VAL 25>
SAMP:COUN 2
READ?

Typical Response: +1.04530000E+00,+1.04570000E+00

Make a second set of measurements using automatic null value selection:

TEMP:NULL:VAL:AUTO ON
READ?

Typical Response: +0.00000000E+00,+0.01420000E+00

[SENSe:]TEMPerature:SECondary {"OFF"|"CALCulate:DATA"|"SENSe:DATA"}
[SENSe:]TEMPerature:SECondary?

Selects the secondary measurement function for temperature measurements.

Parameter Typical Return

{"OFF"|"CALCulate:DATA"|"SENSe:DATA"}, default "OFF"

"CALC:DATA"

Configure a 4-wire RTD measurement. Select the raw sensor value (ohms in this example) as the secondary measurement. Make and retrieve measurements.

CONF:TEMP FRTD,85
TEMP:SEC "SENS:DATA"
READ?;DATA2?

Typical Response: -6.95327319E-01;+9.97282173E+01

[SENSe:]TEMPerature:TRANsducer:{FRTD|RTD}:OCOMpensated {ON|1|OFF|0}
[SENSe:]TEMPerature:TRANsducer:{FRTD|RTD}:OCOMpensated?

Enables or disables offset compensation for 2-wire and 4-wire RTD measurements.

Offset compensation removes the effects of small dc voltages in the circuit being measured. The technique involves taking the difference between two resistance measurements, one with the current source set to the normal value, and one with the current source set to a lower value.

Note This parameter is common to 2-wire and 4-wire resistance measurements. Using the FRTD version of this command or query is identical to using the RTD version.

Parameter Typical Return

{ON|1|OFF|0}. Default: OFF.

0 (OFF) or 1 (ON)

Configure offset-compensated 2-wire RTD measurements. Make and read two measurements:

CONF:TEMP RTD
TEMP:TRANS:RTD:POW:LIM ON
TEMP:TRANS:RTD:OCOM ON
SAMP:COUN 2

READ?

Typical Response: +1.05451008E+01,+1.07391062E+01

[SENSe:]TEMPerature:TRANsducer:{FRTD|RTD}:POWer:LIMit[:STATe] {ON|1|OFF|0}
[SENSe:]TEMPerature:TRANsducer:{FRTD|RTD}:POWer:LIMit[:STATe]?

Enables or disables low-power, 2-wire or 4-wire, RTD measurements.

Note This parameter is common to 2-wire and 4-wire RTD measurements. Using the FRTD version of this command or query is identical to using the RTD version.

Parameter Typical Return
{ON|1|OFF|0}. Default: OFF. 0 (OFF) or 1 (ON)

Configure offset-compensated 2-wire RTD measurements. Make and read two measurements:

CONF:TEMP RTD
TEMP:TRANS:RTD:POW:LIM ON
TEMP:TRANS:RTD:OCOM ON
SAMP:COUN 2

READ?

Typical Response: +1.05451008E+01,+1.07391062E+01

[SENSe:]TEMPerature:TRANsducer:{FRTD|RTD}:RESistance[:REFerence] {<reference>|MIN|MAX|DEF}
[SENSe:]TEMPerature:TRANsducer:{FRTD|RTD}:RESistance[:REFerence]? [{MIN|MAX|DEF}]

Selects the nominal resistance (R0) for 2-wire and 4-wire RTD measurements. R0 is the nominal resistance of an RTD at 0 °C.

Parameter Typical Return

34460A/61A: 80 Ω to 120 Ω. Default: 100 Ω.
34465A/70A: 49 Ω to 2100 Ω. Default: 100 Ω.

+1.00100000E+02

Configure 4-wire RTD measurements using an RTD with an R0 of 100.1 Ω.  Make and read two measurements:
CONF:TEMP FRTD
TEMP:TRAN:FRTD:RES 100.1
SAMP:COUN 2
READ?

Typical Response: +1.04530000E+02,+1.04570000E+02

[SENSe:]TEMPerature:TRANsducer:{FTHermistor|THERmistor}:POWer:LIMit[:STATe] {ON|1|OFF|0}
[SENSe:]TEMPerature:TRANsducer:{FTHermistor|THERmistor}:POWer:LIMit[:STATe]?


Enables or disables low-power thermistor measurements (either 2- or 4-wire).

Parameter Typical Return
{ON|1|OFF|0}. Default: OFF. 0 (OFF) or 1 (ON)

Configure 4-wire thermistor measurements. Enable low-power thermistor measurements.  Make and read two measurements:
CONF:TEMP FTH
TEMP:TRAN:FTH:TYPE 5000
TEMP:TRAN:FTH:POW:LIM ON
SAMP:COUN 2
READ?

Typical Response: +1.04530000E+02,+1.04570000E+02

[SENSe:]TEMPerature:TRANsducer:TYPE {FRTD|RTD|FTHermistor|THERmistor|TCouple}
[SENSe:]TEMPerature:TRANsducer:TYPE?

Selects the transducer probe type to use for temperature measurements. The supported probes are 2-wire and 4-wire RTDs, 2-wire and 4-wire thermistors (5 k 44007 type, see Thermistor Requirements below), and, for the 34465A/70A only, type E, J, K, N, R, or T thermocouples.

Parameter Typical Return
{FRTD|RTD|FTHermistor|THERmistor|TCouple}. Default: FRTD. FRTD, RTD, FTH, TC, or THER

Configure 2-wire RTD measurements using an RTD with an R0 of 100.1 Ω.  Make and read two measurements:

FUNC "TEMP"
TEMP:TRAN:TYPE RTD
TEMP:TRAN:FRTD:RES 100.1
SAMP:COUN 2
READ?

Typical Response: +2.54530000E+01,+2.54570000E+01

[SENSe:]TEMPerature:TRANsducer:TCouple:CHECk {ON|1|OFF|0}
[SENSe:]TEMPerature:TRANsducer:TCouple:CHECk?

Disables or enables the thermocouple check feature to verify that your thermocouples are properly connected for measurements. When enabled, the instrument measures the resistance after each thermocouple measurement to ensure a proper connection. If an open connection is detected (greater than 5 kΩ on the 10 kΩ range), the instrument reports an overload condition.

Parameter Typical Return
{ON|1|OFF|0}. Default: OFF. 0 (OFF) or 1 (ON)

Configure K-type thermocouple measurements. Select fixed reference junction and set reference junction temperature to +20 °C. Enable thermocouple check.  Make and read two measurements:


CONF:TEMP TC,K
TEMP:TRAN:TC:RJUN:TYPE FIX
TEMP:TRAN:TC:RJUN 20.0
TEMP:TRAN:TC:CHEC ON
SAMP:COUN 2
READ?

Typical Response: +3.31785468E+00,+3.61554515E+00

[SENSe:]TEMPerature:TRANsducer:TCouple:RJUNction {<temperature>|MIN|MAX|DEF}]
[SENSe:]TEMPerature:TRANsducer:TCouple:RJUNction? [{MIN|MAX|DEF}]

Sets the fixed reference junction temperature in degrees Celsius for thermocouple measurements.

Parameter Typical Return
-20 °C to +80 °C. Default: 0 °C. +2.00000000E+01   (always in degrees Celsius).

Configure K-type thermocouple measurements. Select fixed reference junction and set reference junction temperature to +20 °C. Enable thermocouple check.  Make and read two measurements:


CONF:TEMP TC,K
TEMP:TRAN:TC:RJUN:TYPE FIX
TEMP:TRAN:TC:RJUN 20.0
TEMP:TRAN:TC:CHEC ON
SAMP:COUN 2
READ?

Typical Response: +3.31785468E+00,+3.61554515E+00

[SENSe:]TEMPerature:TRANsducer:TCouple:RJUNction:OFFSet:ADJust {<temperature>|MIN|MAX|DEF}
[SENSe:]TEMPerature:TRANsducer:TCouple:RJUNction:OFFSet:ADJust? [{MIN|MAX|DEF}]

Allows you to make minor temperature adjustments to correct for the differences between the DMM internal temperature measurement of the front connection and the actual temperature of the measurement terminals.

Parameter Typical Return

-20 °C to +20 °C. Default: 0 °C.

+2.00000000E+01

Configure thermocouple temperature measurements using the internal reference junction. Measure the temperature inside the instrument. Assuming the temperature outside the instrument is 5 °C cooler than the inside measurement, adjust the temperature by -5 °C. Then make and read one measurement:

CONF:TEMP TC,K
TEMP:TRAN:TC:RJUN:TYPE INT
TEMP:TRAN:TC:CHEC ON
SYST:TEMP?
TEMP:TRAN:TC:RJUN:OFFS:ADJ -5
READ?

Typical Response: +3.31785468E+00

[SENSe:]TEMPerature:TRANsducer:TCouple:RJUNction:TYPE {INTernal|FIXed}
[SENSe:]TEMPerature:TRANsducer:TCouple:RJUNction:TYPE?

Thermocouple measurements require a reference junction temperature. For the reference junction temperature, you can use an internal measurement, or a known fixed junction temperature. This command selects the reference junction source for thermocouple measurements.

Parameter Typical Return
{FIXed|INTernal} default INT FIX or INT

Configure K-type thermocouple measurements. Select fixed reference junction and set reference junction temperature to +20 °C. Enable thermocouple check.  Make and read two measurements:


CONF:TEMP TC,K
TEMP:TRAN:TC:RJUN:TYPE FIX
TEMP:TRAN:TC:RJUN 20.0
TEMP:TRAN:TC:CHEC ON
SAMP:COUN 2
READ?

Typical Response: +3.31785468E+00,+3.61554515E+00

[SENSe:]TEMPerature:TRANsducer:TCouple:TYPE {E|J|K|N|R|T}
[SENSe:]TEMPerature:TRANsducer:TCouple:TYPE?

Selects the thermocouple type for thermocouple measurements.

Parameter Typical Return
{E|J|K|N|R|T} default J E, J, K, N, R, or T

Configure K-type thermocouple measurements. Select fixed reference junction and set reference junction temperature to +20 °C. Enable thermocouple check.  Make and read two measurements:


CONF:TEMP TC,K
TEMP:TRAN:TC:RJUN:TYPE FIX
TEMP:TRAN:TC:RJUN 20.0
TEMP:TRAN:TC:CHEC ON
SAMP:COUN 2
READ?

Typical Response: +3.31785468E+00,+3.61554515E+00

[SENSe:]TEMPerature:TRANsducer:{FTHermistor|THERmistor}:TYPE 5000
[SENSe:]TEMPerature:TRANsducer:{FTHermistor|THERmistor}:TYPE?

Selects the thermistor type for 2-wire and 4-wire temperature measurements. Choosing the THERmistor or the FTHermistor command form makes no difference, as both commands affect the same parameter.

Parameter Typical Return
5000 (only available choice) +5000

Configure 4-wire thermistor measurements.  Make and read two measurements:
CONF:TEMP FTH
TEMP:TRAN:FTH:TYPE 5000
SAMP:COUN 2
READ?

Typical Response: +1.04530000E+02,+1.04570000E+02

[SENSe:]TEMPerature:ZERO:AUTO {OFF|ON|ONCE}
[SENSe:]TEMPerature:ZERO:AUTO?

Disables or enables the autozero mode for 2-wire temperature measurements.

Parameter Typical Return
{OFF|ON|ONCE}. Default: ON. 0 (OFF) or 1 (ON)

Configure 2-wire RTD measurements and perform an immediate zero autozero.  Make and read two measurements:
CONF:TEMP RTD
TEMP:ZERO:AUTO ONCE
SAMP:COUN 2
READ?

Typical Response: +2.57530000E+01,+2.57570000E+01