Specifications

[SENSe:]FUNCtion:CUSTom:REFerence
[SENSe:]FUNCtion:CUSTom:REFerence [<range>,](@<ch_list>) links
channels with the custom Engineering Unit Conversion table loaded with the
DIAG:CUST:PIECE command. Measurements from a channel linked with
SENS:FUNC:CUST:REF will result in a temperature that is sent to the Reference
Temperature Register. This command is used to measure the temperature of an
isothermal reference panel using custom characterized RTDs or thermistors. Contact
a VXI Technology System Engineer for more information on Custom Engineering
Unit Conversion for specific applications.
Parameters
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
range numeric (float32) see comments V dc
ch_list channel list (string) 100 - 163 none
Comments
·
See “Linking Input Channels to EU Conversion” (page 57) for more information.
·
The <range> parameter: The VT1419A has five ranges: 0.0625 V dc, 0.25 V dc,
1 V dc, 4 V dc, and 16 V dc. To select a range, simply specify the range value
(for example, 4 selects the4Vdcrange).
·
If a value is specified larger than one of the first four ranges, the VT1419A selects
the next higher range (for example, 4.1 selects the 16 V dc range). Specifying a
value larger than 16 generates an error. Specifying 0 selects the lowest range
(0.0625 V dc). Specifying AUTO selects auto range. The default range (no range
parameter specified) is auto range.
·
If using amplifier SCPs, set them first and keep their settings in mind when
specifying a range setting. For instance, if the expected signal voltage is to be
approximately 0.1 V dc and the amplifier SCP for that channel has a gain of 8,
<range> must be set no lower than1Vdcoraninput out-of-range condition will
exist.
·
The *CAL? command calibrates temperature channels based on Sense Amplifier
SCP setup at the time of execution. If SCP settings are changed, those channels
are no longer calibrated. *CAL? must be executed again.
·
Related Commands: DIAG:CUST:PIEC, SENS:FUNC:TEMP,
SENS:FUNC:CUST:TC, *CAL?
·
*RST Condition: all custom EU tables erased
Usage A program must put table constants into array< table_block>
DIAG:CUST:PIEC 1,table_block,(@108) send characterized reference transducer
table for use by channel 8
SENS:FUNC:CUST:REF .25,(@108) link custom ref temp EU with ch 8
include this channel in a scan list with thermocouple channels (REF channel first)
INITiate then TRIGger module
VT1419A Command Reference
[SENSe]
Chapter 6 269
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