Current Range Calibration Commands - Keithley SourceMeter 3A 2420 Service Manual

Table 2-11

Current range calibration commands

Step Command/procedure*
1 :SOUR:CURR:RANGE <Range>
2 :SOUR:CURR -<Source_value>
3 Take DMM reading.
4 :CAL:PROT:SOUR <DMM_Reading>
5 Check 2420 for errors.
6 :CAL:PROT:SENS <DMM_Reading>
7 Check 2420 for errors.
8 :SOUR:CURR 0.0
9 Take DMM reading.
10 :CAL:PROT:SOUR <DMM_Reading>
11 Check 2420 for errors.
12 :CAL:PROT:SENS <DMM_Reading>
13 Check 2420 for errors.
14 :SOUR:CURR +<Source_value>
15 Take DMM reading.
16 :CAL:PROT:SOUR <DMM_Reading>
17 Check 2420 for errors.
18 :CAL:PROT:SENS <DMM_Reading>
19 Check 2420 for errors.
20 :SOUR:CURR 0.0
21 Take DMM reading.
22 :CAL:PROT:SOUR <DMM_Reading>
*1. Perform complete procedure for each range, where <Range> and <Source_value> = 10E-6, 100E-6, 1E-3,
10E-3, 100E-3, 1, or 3.
2. <DMM_Reading> parameter is multimeter reading from previous step.
3. Use :SYST:ERR? query to check for errors.
Step 4: Program calibration dates
Use following commands to set the calibration date and calibration due date:
:CAL:PROT:DATE <year>, <month>, <day> (Calibration date)
:CAL:PROT:NDUE <year>, <month>, <day> (Next calibration due date)
Note that the year, month, and date must be separated by commas. The allowable range for
the year is from 1997 to 2096, the month is from 1 to 12, and the date is from 1 to 31.
Step 5: Save calibration constants
Calibration is now complete, so you can store the calibration constants in EEROM by sending
the following command:
:CAL:PROT:SAVE
Description
Select source range.
Establish negative full-range polarity.
Read actual output value.
Calibrate sense function negative full scale.
Calibrate source function negative full scale.
Set output to 0A.
Read actual output value.
Calibrate sense function negative zero.
Calibration source function negative zero.
Establish positive full-range polarity.
Read actual output value.
Calibrate sense function positive full scale.
Calibrate source function positive full scale.
Set output to 0A.
Read actual output value.
Calibrate source positive zero.
Calibration 2-21