Tektronix KEITHLEY SourceMeter 2400 Series Calibration And Adjustment Manual page 24

Model 2461 Calibration and Adjustment Manual
Current calibration verification procedure for the 4 A to 10 A ranges
Step Command or procedure
1
*RST
2 :SOUR:FUNC CURR
3 :FUNC "CURR"
4 :SOUR:CURR:RANG <Range>
5 :SYST:RSEN OFF
6 :ROUT:TERM <FRONT or REAR>
7 :SOUR:CURR <Level>
8 :OUTP:STAT ON
9 Make DMM reading.
10 (calculated I) = (DMM V reading) / R
11 :READ?
12 :DIG:FUNC "CURR"
13 :DIG:CURR:APER AUTO
14 :DIG:CURR:SRAT 1000
15 :DIG:COUNT 1
16 :READ:DIG?
17 :OUTP:STAT OFF
18 Calculate the source error.
19 Calculate the measure error.
20 Calculate the digitizer error.
21 Validate source accuracy.***
22 Validate measure accuracy.****
23 Validate digitizer accuracy.****
* The measure range is coupled to the source range when simultaneously sourcing and measuring current.
*** Where <Range> = 4, 5, and 7.
**** The source limits are calculated based on the programmed source value of the Model 2461 for each range
(not the actual source value).
***** The measure limits are calculated based on a precise measurement of the programmed value of the
Model 2461 (not the programmed 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 4-wire 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.
Calculate the shunt current.
Have the Model 2461 measure and return its
source output.
Select the digitize current function.*
Set aperture to match sample rate.
Set 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 10.
Calculate the difference between step 10 and
step 11.
Calculate the difference between step 10 and
step 16.
Compare the result of step 18 to the source
specification.
Compare the result of step 19 to the measure
specification.
Compare the result of step 20 to the digitizer
specification.
Section 3: Calibration
3-9