VXI VT1422A User Manual
Page 86
84 Programming the VT1422A & VT1529A/B for Remote Strain Measurement
Figure 3-17. Sequence for User’s Custom EU Conversion
Retrieve readings from
FIFO and/or CVT
Trigger event for each pass
through Scan List
Set up Trigger System to scan
strain bridge channels
Set up the analog input Scan List
Measure unstrained bridge output
voltages and retrieve from FIFO
Measure bridge excitation
voltages and retrieve from FIFO
Enable excitation voltage
to the strain bridges
SENSe:STRain:EXCitation:STATe
MEASure:VOLTage:EXCitation?
SENS:DATA:FIFO:PART?
MEASure:VOLTage:UNSTrained?
SENSE:DATA:FIFO:PART?
ROUTe:SEQuence:DEFine
TRIG:SOURce, TRIG:COUNt, ARM:SOURce
TRIG:TIMer
Set up Sample Timer for best
channel-to-channel scan rate
Initiate Trigger System
SAMPle:TIMer
INITiate[:IMMediate]
TRIG[:IMM], *TRG (if TRIG:SOUR HOLD),
EXTernal trig, TTLTRGn signal, or TRIG:TIMer
SENSe:DATA:FIFO:..., SENSe:DATA:CVTable?
Set Input Filter on VT1529A/B
INPut:FILTer:FREQuency and INPut:FILTer:STATe
M(slope)=<your equation>
B(offset)=<your equation>
Download your linear EU conversion
solve your equation for M and B as a function of
V
unstrained
and V
excitation
and Gage Factor
DIAGnostic:CUSTom:MXB
,
,(@
)
<M> <B>
<ch_list>
Convert readings using your custom
EU conversion
SENS:FUNC:CUST <range>,(@
)
<ch_list>
Set bridge configuration switches
SENSe:STRain:BRIDge[:TYPE]