[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 tem-
perature, 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
l Applies only to the 34465A and 34470A.
l
Important: Since the internal reference temperature is the temperature of the front connections, use
of the rear connections with the selection of the internal reference junction will have an unknown
error with no specified performance and is not recommended.
l The accuracy of the measurement is highly dependent upon the thermocouple connections and the
type of reference junction used. Use a fixed temperature reference for the highest accuracy meas-
urements (you must maintain the known junction temperature).
l
If you select a fixed reference junction source, you can specify a value between -20°C and +80°C
using the [Sense:]TEMPerature:TRANsducer:TCouple:RJUNction command. You must always specify
the temperature in degrees Celsius regardless of the temperature units currently selected (see
UNIT:TEMPerature command).
l You can read the internal reference junction temperature using the SYSTem:TEMPerature command.
l This parameter is set to its default value after a Factory Reset (*RST) or Instrument Preset
(SYSTem:PRESet).
Keysight Truevolt Series Operating and Service Guide
369
SCPI Programming Reference
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