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2-20
Calibration
•
Program the source to output the negative full-range value using the
:SOUR:CURR command. For example:
:SOUR:CURR -1E-3
•
Note and record the multimeter reading.
•
Use the multimeter reading as the parameter for the :CAL:PROT:SOUR and
:CAL:PROT:SENS commands. For example, a typical value for the 1mA range
would be:
:CAL:PROT:SOUR -1.025E-3
:CAL:PROT:SENS -1.025E-3
•
Program the current source for 0A output using the :SOUR:CURR 0.0 command.
•
Note the multimeter reading.
•
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 1E-3
•
Note and record the multimeter reading.
•
Send the source and sense commands using the multimeter reading as the param-
eter. 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.
•
Note and record the multimeter reading.
•
Send the :CAL:PROT:SOUR command using the multimeter reading as the com-
mand parameter. For example:
:CAL:PROT:SOUR 1E-6
4.
Connect the 1
Ω
resistor and DMM to the Model 2420 INPUT/OUPUT jacks, as shown
in Figure 2-3. Select the DMM DC volts function.
5.
Repeat step 3 for the 3A range using the calculated current as follows: I = V/R, where V
is the DMM voltage reading, and R is the characterized value of the 1
Ω
resistor.
Table 2-10
Current calibration initialization commands
Command
Descripton
:SOUR:FUNC CURR
Select source current mode.
:SENS:VOLT:PROT 20
Voltage limit when current source is active.
:SENS:VOLT:RANG 20
Make sure 60V range is not active.
:OUTP:STAT ON
Turn source on.
Summary of Contents for SourceMeter 3A 2420
Page 2: ...Model 24203A SourceMeter Service Manual A G R E A T E R M E A S U R E O F C O N F I D E N C E...
Page 15: ...1 Performance Verification...
Page 31: ...2 Calibration...
Page 53: ...3 Routine Maintenance...
Page 56: ...3 4 Routine Maintenance...
Page 57: ...4 Troubleshooting...
Page 70: ...4 14 Troubleshooting...
Page 71: ...5 Disassembly...
Page 78: ...5 8 Disassembly...
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Page 84: ...6 Replaceable Parts...
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Page 107: ...A Specifications...
Page 112: ...A 6 Specifications...
Page 113: ...B Command Reference...
Page 124: ...B 12 Command Reference...
Page 125: ...C Calibration Programs...