![background image](http://html1.mh-extra.com/html/keithley/2303/2303_service-manual_4044894044.webp)
5.
Send the following command for DVM full-scale calibration:
:CAL:PROT:STEP3
6.
Connect the Model 2303-PJ OUTPUT SOURCE terminals to the DMM volts input and
characterized 4
Ω
resistor, as shown in Figure 2-3. Be sure to observe proper polarity
( to INPUT HI; SOURCE - to INPUT LO).
7.
Make sure the digital multimeter DC volts function and auto-ranging are still selected.
8.
Send the following command to output 1.9A for 5A full-scale calibration:
:CAL:PROT:STEP4 1.9
9.
Note and record the DMM voltage reading, then calculate the current from that reading
and 4
Ω
resistor value. Send the following command using that calculated current as the
parameter:
:CAL:PROT:STEP5 <Calculated_Current>
For example, with a current value of 1.894A, the command would appear as follows:
:CAL:PROT:STEP5 1.894
10.
Note and record a new DMM voltage reading, then again calculate the current from the
voltage and resistance. Send the calculated current value as the parameter for the follow-
ing command:
:CAL:PROT:STEP6 <Calculated_Current>
11.
Connect the characterized 30
Ω
resistor in place of the 4
Ω
resistor. (See Figure 2-5.)
12.
Make sure the DMM DC volts function and auto-range are still selected.
13.
Send the following command to output approximately 500mA for 500mA full-scale
calibration:
:CAL:PROT:STEP7
14.
Note and record the DMM voltage reading, then calculate the current from the voltage
reading and actual 30
Ω
resistance value. Send that current value as the parameter for the
following command:
:CAL:PROT:STEP8 <Calculated_Current>
For example, with a current of 450mA, the command would be:
:CAL:PROT:STEP8 450E-3
深圳德标仪器
135-1095-0799
Summary of Contents for 2303
Page 12: ...1 Performance Verification 135 1095 0799...
Page 26: ...2 Calibration 135 1095 0799...
Page 48: ...3 Disassembly 135 1095 0799...
Page 53: ...3 6 Disassembly 135 1095 0799...
Page 76: ...A Specifications 135 1095 0799...
Page 81: ...A 7 Specifications 135 1095 0799...
Page 82: ...B CalibrationReference 135 1095 0799...
Page 90: ...C CalibrationPrograms 135 1095 0799...