Справочник Пользователя для VXi VT1422A

If an algorithm is loaded while method "b" is used, the FIFO may contain 
more than just the unstrained voltage readings. It is up to the user to obtain 
the correct data and input it into the VT1422A.

3. The power-on and *RST excitation voltage value is 1.0E6; this value 

was chosen purposely so that obviously bad readings would result if 
this value was not changed to the true excitation voltage. This value 
MUST be changed to obtain reasonable reading values. There are two 
ways to change any channel’s value:

a. Use the MEAS:VOLTage:EXCitation? query (recommended) 

which will take an average of 32 voltage readings on each 
specified channel(s) and save the value(s) internally for later use 
by the strain EU conversion process. When using this method, any 
loaded algorithm(s) are not executed to avoid putting extraneous 
values into the FIFO buffer. The voltage readings are also sent to 
the FIFO buffer for review later if desire.

b. Measure the voltage directly using the following series of 

commands:

                 ROUTe:SEQ:DEFine  (input the list of channels to measure) 

                 SENSe:FUNC:VOLT  (sets measurement to voltage)

                 INIT  (assuming trigger system defaults, starts single scan) 

                 SENS:DATA:FIFO?  (reads the data)

Next, the excitation voltage values read in above must be sent 
back to the VT1422A’s EU conversion routine by using the 
command: SENS:STRain:EXC <voltage value>,(@<channel>)

If an algorithm is loaded while method "b" is used, it will execute and may 
place values in the FIFO in addition to the unstrained voltage readings. 
It is up to the user to obtain the correct data and input it into the VT1422A.

Figure 3-16 shows the sequence of commands to measure remote strain 
channels using the built-in strain Engineering Unit Conversion routines.