Specifications

Usage FUNC:VOLT (@140:163) Channels 40 - 63 measure voltage in
auto-range (defaulted)
[SENSe:]REFerence
[SENSe:]REFerence <type>,<sub_type>,[<range>,](@<ch_list>) links channel in
<ch_list> to the reference junction temperature EU conversion based on <type> and
<sub_type>. When scanned, the resultant value is stored in the Reference
Temperature Register and by default the FIFO and CVT. This is a resistance
temperature measurement and uses the on-board 122 µA current source.
NOTE The reference junction temperature value generated by scanning the reference
channel is stored in the Reference Temperature Register. This reference temperature
is used to compensate all subsequent thermocouple measurements until the register
is overwritten by another reference measurement or by specifying a constant
reference temperature with the SENSE:REF:TEMP command. If used, the reference
junction channel must be scanned before any thermocouple channels. Use the
SENSE:REF:CHANNELS command to place the reference measuring channel into
the scan list ahead of the thermocouple measuring channels.
Parameters
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
type discrete (string) THERmistor | RTD | CUSTom none
sub_type numeric (float32)
numeric (float32)
for THER use 5000
for RTD use 85 | 92
for CUSTom use 1
ohm
none
none
range numeric (float32) see comments V dc
ch_list channel list (string) 100 - 163 none
Comments
·
See “Linking Input Channels to EU Conversion” on 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 causes 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 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.
VT1419A Command Reference
[SENSe]
Chapter 6 277
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