Model 2500 Service Manual Calibration 2-23
Step 4. Channel 2 input offset voltage calibration
1. Install a triax shielding cap on the channel 2 INPUT jack.
2. Send this command to calibrate channel 2 input offset voltage:
:CAL:PROT:SOUR2:OFFS
Step 5. Channel 2 voltage source calibration
Follow these steps to calibrate the channel 2 voltage bias source. Table 2-9 summarizes
channel 1 calibration voltages and commands.
1. Connect the DMM to the Model 2500 channel 2 OUTPUT and INPUT LO termi-
nals, as shown in Figure 2-2.
2. Select the DMM DC voltage function, and enable auto-range.
3. Send this command to turn on the channel 2 output:
:OUTP2 ON
4. Send the following command to select the channel 2 10V voltage bias range:
:SOUR2:VOLT:RANG 10
5. Send the following command to output +10V:
:SOUR2:VOLT 10
Table 2-8
Channel 1 remote voltage bias calibration summary
Voltage bias
range
Calibration
voltages Calibration commands
10V
+10V
0V
-10V
:OUTP1 ON
:SOUR1:VOLT:RANG 10
:SOUR1:VOLT 10
:CAL:PROT:SOUR1 <DMM_Reading>
:SOUR1:VOLT 0
:CAL:PROT:SOUR1 <DMM_Reading>
:SOUR1:VOLT -10
:CAL:PROT:SOUR1 <DMM_Reading>
100V
+100V
0V
-100V
:SOUR1:VOLT:RANG 100
:SOUR1:VOLT 100
:CAL:PROT:SOUR1 <DMM_Reading>
:SOUR1:VOLT 0
:CAL:PROT:SOUR1 <DMM_Reading>
:SOUR1:VOLT -100
:CAL:PROT:SOUR1 <DMM_Reading>
:OUTP1 OFF
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