Tektronix KEITHLEY SourceMeter 2400 Series Calibration And Adjustment Manual page 20

Model 2461 Calibration and Adjustment Manual
Complete the calibration verification steps listed in the following table for each voltage range. For
each voltage range, perform the complete procedure at 95 percent of the range's positive full-scale
value, then at 0 V, then at 95 percent of the range's negative full scale value, and then again at 0 V.
For example, for the 200 mV range, complete the procedure four times using each of the following
values, in this order: +190 mV, 0 V, −190 mV, 0 V.
Voltage calibration verification procedure
Step Command or procedure
1 *RST
2 :SOUR:FUNC VOLT
3 :FUNC "VOLT"
4 :SOUR:VOLT:RANG <Range>
5 :SYST:RSEN OFF
6 :ROUT:TERM <FRONT or REAR>
7
:SOUR:VOLT <Level>
8 :OUTP:STAT ON
9 Make DMM reading.
10 :READ?
11 :DIG:FUNC "VOLT"
12 :DIG:VOLT:APER AUTO
13 :DIG:VOLT:SRAT 1000
14
:DIG:COUNT 1
15 :READ:DIG?
16 :OUTP:STAT OFF
17 Calculate the source error.
18 Calculate the measure error.
19 Calculate the digitizer error.
20 Validate source accuracy.****
21 Validate measure accuracy.*****
22 Validate digitizer accuracy.*****
* The measure range is coupled to the source range when simultaneously sourcing and measuring voltage,
so you do not need to set the measure range.
** Where <Range> = 0.2, 2, 7, 10, 20, and 100.
*** With remote sense off, you may need to add a relative offset to compensate for cable noise.
**** The source limits are calculated based on the programmed source value of the Model 2461 for each range
(not the actual value).
***** The measure and digitize limits are calculated based on a precise measurement of the programmed value of the
Model 2461 by the external reference DMM (not the programmed source value).
2461-905-01 Rev. A / February 2016
Description
Restore default settings.
Select the source function.
Select the measure function.*
Set the source range.**
Disable remote sensing.***
Select the front-panel or rear-panel terminals to
match your test setup.
Program the source value.
Turn on the source output.
Read the actual output of the Model 2461 using
the external DMM.
Have the Model 2461 measure and return its
source output.
Select the digitize voltage function.*
Set the aperture to match the sample rate.
Set to 1000 readings/s (1 mS aperture).
Digitize one sample when triggered.
Return the digitized reading of the source output.
Turn off the source output.
Calculate the difference between step 7 and
step 9.
Calculate the difference between step 9 and
step 10.
Calculate the difference between step 9 and
step 15.
Compare the result of step 17 to the source
specification.
Compare the result of step 18 to the measure
specification.
Compare the result of step 19 to the digitize
specification.
Section 3: Calibration
3-5