Keithley SourceMeter 2400, Service Manual, Page: 49 / 137

2-21 Model 2400 Service Manual
Calibration
2400-902-01 (G - Feb 2006)
• Note the multimeter reading.
Table 2-11
Current range calibration commands
Step Command/procedure* Description
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
:SOUR:CURR:RANGE <Range>
:SOUR:CURR -<Range>
Take DMM reading.
:CAL:PROT:SOUR <DMM_Reading>
Check 2400 for errors.
:CAL:PROT:SENS <DMM_Reading>
Check 2400 for errors.
:SOUR:CURR 0.0
Take DMM reading.
:CAL:PROT:SOUR <DMM_Reading>
Check 2400 for errors.
:CAL:PROT:SENS <DMM_Reading>
Check 2400 for errors.
:SOUR:CURR +<Range>
Take DMM reading.
:CAL:PROT:SOUR <DMM_Reading>
Check 2400 for errors.
:CAL:PROT:SENS <DMM_Reading>
Check 2400 for errors.
:SOUR:CURR 0.0
Take DMM reading.
:CAL:PROT:SOUR <DMM_Reading> Select source range.
Establish negative 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.
Calibrate source function negative zero.
Establish positive 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.
*1. Perform complete procedure for each range, where <Range> = 1E6, 10E6, 100E6, 1E3, 10E3, 100E3, or 1.
* 2. <DMM_Reading> parameter is multimeter reading from previous step.
* 3. Use :SYST:ERR? query to check for errors.
• Send the source and sense calibration commands using the multimeter reading for
the parameter. For example:
:CAL:PROT:SOUR 1E-6
:CAL:PROT:SENS 1E-6
• Set the source to the positive full-range value using the :SOUR:CURR command.
For example, for the 1mA range:
:SOUR:CURR 1E3
• Note and record the multimeter reading.
• Send the source and sense commands using the multimeter reading as the
parameter. For example:
:CAL:PROT:SOUR 1.03E-3
:CAL:PROT:SENS 1.03E-3
• Send the :SOUR:CURR 0.0 command to set the source current to 0A.