Specifications

·
[SENSe:]FUNCtion:STRain:<bridge_type>[<range>,](@<ch_list>) links the
strain EU conversion with the channels specified by ch_list to measure the bridge
voltage. See “Linking Input Channels to EU Conversion” on page 57 for more
information.
<bridge_type> is not a parameter but is part of the command syntax. The following
table relates the command syntax to bridge type. See the user’s manual for the
optional Strain SCP for bridge schematics and field wiring information.
Command Bridge Type
:FBENding Full Bending Bridge
:FBPoisson Full Bending Poisson Bridge
:FPOisson Full Poisson Bridge
:HBENding Half Bending Bridge
:HPOisson Half Poisson Bridge
[:QUARter] Quarter Bridge (default)
Parameters
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
range numeric (flt32) see comments V dc
ch_list channel list (string) 1320 - 163 none
Comments
·
Strain measurements require the use of Bridge Completion Signal Conditioning
Plug-Ons.
·
Bridge Completion SCPs provide the strain measurement bridges and their
excitation voltage sources. <ch_list> specifies the voltage sensing channels that
are to measure the bridge outputs. Measuring channels on a Bridge Completion
SCP only returns that SCP’s excitation source voltage.
·
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 channel calibration command (*CAL?) calibrates the excitation voltage
source on each Bridge Completion SCP.
VT1419A Command Reference
[SENSe]
Chapter 6 273
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