Keithley 6482 - Page 288

6482-901-01 Rev. A / August 2012 Return to Section Topics 17-33
Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual Section 17: Calibration
Step 2. Channel 1 input offset voltage calibration adjustment
1. Install a triaxial shielding cap on the channel 1 INPUT connector.
2. Send this command to calibrate channel 1 input offset voltage:
:CAL:PROT:SOUR1:OFFS
Step 3. Channel 1 voltage source calibration adjustment
Follow these steps to calibrate the channel 1 voltage bias source. Table 17-12 summarizes
channel 1 calibration voltages and commands.
1. Connect the DMM to the Model 6482 channel 1 OUTPUT and INPUT LO terminals, as shown
in Figure 17-7.
2. Select the DMM DC voltage function and then enable autorange.
3. Send the following command to turn on the channel 1 output:
:OUTP1 ON
4. Send the following command to select the channel 1, 10 V voltage bias range:
:SOUR1:VOLT:RANG 10
5. Send the following command to output +10 V:
:SOUR1:VOLT 10
6. Note and record the DMM reading, and send that value as the parameter for the following
command:
:CAL:PROT:SOUR1 <DMM_Reading>
For example, if the DMM reading is 9.95 V, the correct command is:
:CAL:PROT:SOUR1 9.95
7. Send the following command to output 0 V:
:SOUR1:VOLT 0
8. Note and record the DMM reading, and send that value as the parameter for the following
command:
:CAL:PROT:SOUR1 <DMM_Reading>
9. Send the following command to output -10 V:
:SOUR1:VOLT -10
10. Note and record the DMM reading, and send that value as the parameter for the following
command:
:CAL:PROT:SOUR1 <DMM_Reading>
11. Repeat steps 4 through 10 for the 30 V range using Table 17-12 as a guide. Be sure to:
• Select the 30 V range using the :SOUR1:VOLT:RANG 30 command.
• Send the ±30 V source values, where appropriate.
12. Send the following command to turn off the channel 1 output:
:OUTP1 OFF