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Section 15: Calibration procedure
2 nA to 200 nA range current offset
To calibrate the current offset for each range:
1. Connect the DMM to the Model 6517B preamp output, and place the triaxial cap on the Model
6517B input.
:CAL:PROT:IOFF:STEP 1
:CAL:PROT:IOFF1
2. Allow the input to settle for 120 seconds, then take the DMM voltage reading.
:CAL:PROT:IOFF2 <dmm voltage reading>
:CAL:PROT:IOFF3
3. Allow the input to settle for 120 seconds, then take the DMM voltage reading.
:CAL:PROT:IOFF4 <dmm voltage reading>
20 pA to 200 pA range current offset
To calibrate the current offset for each range:
1. Connect the DMM to the Model 6517B preamp output, and place the triaxial cap on the Model
6517B input.
:CAL:PROT:IOFF:STEP 2
:CAL:PROT:IOFF1
2. Allow the input to settle for 120 seconds, then take the DMM voltage reading.
:CAL:PROT:IOFF2 <dmm voltage reading>
:CAL:PROT:IOFF3
3. Allow the input to settle for 120 seconds, then take the DMM voltage reading.
:CAL:PROT:IOFF4 <dmm voltage reading>
4. Disconnect the DMM from the preamp output, and place a triaxial cap on the Model 6517B input.
2 nC to 20 nC ranges current offset
To calibrate the current offset for each range:
:CAL:PROT:IOFF:STEP 3
200 nC to 2 uC ranges current offset
To calibrate the current offset for each range:
:CAL:PROT:IOFF:STEP 4
Voltage ranges current offset
To calibrate the current offset for each range:
:CAL:PROT:IOFF:STEP 5
15-6
Model 6517B Electrometer Reference Manual
6517B-901-01 Rev. C / August 2015
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