7-4 Relative, Math, Ratio, and Delta Models 2500 and 2502 User’s Manual
Rel programming example
Table 7-2 lists commands for setting up and enabling rel. These commands set up the
Model 2500 as follows:
• Channel 1 rel value: 1e-3
• Channel 1 feed: SENS1 (current function block)
• Channel 1 rel state: enabled
Measurement math functions
Math functions
Each Model 2500 channel has built-in math functions to calculate the following:
• I/V
• V/I
• MX + B
• Electrical power
• Optical power
NOTE Math function uses the current and voltage from the same channel for
calculations.
I/V
This math function computes the ratio between the selected channel current measurement
and the voltage bias source value:
Reading = I/V
where: I = channel 1 or channel 2 current
V= channel 1 or channel 2 voltage bias
Table 7-2
Rel programming example
Command Description
:CALC3:NULL:OFFS 1e-3
:CALC3:FEED SENS1
:CALC3:NULL:STAT ON
:OUTP1 ON
:INIT
:CALC3:DATA?
:OUTP1 OFF
Rel value = 1e-3.
Current measure feed.
Enable rel.
Output on.
Trigger reading.
Get reading.
Turn off output.
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