VXi VT1529A/B 사용자 설명서

The VT1422A can measure temperature using custom characterized 
thermocouple wire of types E, J, K, N, R, S, and T. The custom EU table 
generated for the individual batch of thermocouple wire is loaded to the 
appropriate channels using the DIAG:CUST:PIEC command. Since 
thermocouple EU conversion requires a "reference junction compensation" 
of the raw thermocouple voltage, the custom EU table is linked to the 
channel(s) using the command [SENSe:]FUNCtion:CUSTom:TCouple  
<type>[,<range>],(@<ch_list>).

The <type> parameter specifies the type of thermocouple wire so that the 
correct built-in table will be used for reference junction compensation. 
Reference junction compensation is based on the reference junction 
temperature at the time the custom channel is measured. For more 
information, see “Thermocouple Reference Temperature Compensation” on 
page 114.

The VT1422A can measure reference junction temperatures using custom 
characterized RTDs and thermistors. The custom EU table generated for the 
individually characterized transducer is loaded to the appropriate channel(s) 
using the DIAG:CUST:PIEC command. Since the EU conversion from this 
custom EU table is to be considered the "reference junction temperature", 
the channel is linked to this EU table using the command 
[SENSe:]FUNCtion:CUSTom:REFerence  [<range>,](@<ch_list>).

This command uses the custom EU conversion to generate the reference 
junction temperature as explained in the section “Thermocouple Reference 
Temperature Compensation” on page 114.

Contact a VXI Technology System Engineer for more information on 
creating Custom Engineering Unit Conversion.

There is a specific location in the VT1422A’s memory for each channel’s 
EU Conversion table. When standard EU conversions are specified, the 
VT1422A loads these locations with EU conversion tables copied from its 
non-volatile flash memory. For Custom EU conversions, these table values 
must be loaded using either of two SCPI commands.

The DIAGnostic:CUSTom:MXB <slope>,<offset>, (@<ch_list>) command 
sends the <slope> and <offset> parameters that allow the driver to calculate 
and download a custom linear Engineering Unit Conversion table to the 
VT1422A for each channel specified.

•

<slope> specifies the linear function’s "slope":

•

<offset> specifies the conversion offset at zero input volts. 

This parameter is also commonly known as the "Y-intercept."

•

<ch_list> specifies which channels will have this custom EU table loaded.

outp1

outp0

–

(

) V

in1

in0

–

(

)

⁄