[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: +3.3100,+3.6100
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Applies only to the 34465A and 34470A.
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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.
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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).
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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
command).
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You can read the internal reference junction temperature using the
command.
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This parameter is set to its default value after a Factory Reset (
) or Instrument Preset
(
).
Keysight True
volt
Series Operating and Service Guide
369
SCPI Programming Reference
