Keithley 2303, Service Manual, Page: 40 / 104

Calibration 2-15
Remote calibration display
The Model 2303 and Model 2303-PJ will display the following while being calibrated over
the bus:
CALIBRATING UNIT
FROM THE BUS R
Models 2303 and 2303B remote calibration procedure
Use the following procedure to calibrate the Models 2303 and 2303B. Table 2-5 summarizes
the calibration steps.
NOTE Calibration steps must be performed in the following sequence, or an error will occur.
You can abort the procedure and revert to previous calibration constants before
:SAVE by sending the :CAL:PROT:LOCK command.
Step 1: Prepare the Model 2303 for calibration
1. Connect the Model 2303 to the controller IEEE-488 interface using a shielded interface
cable.
2. Turn on the Model 2303 and the test equipment, and allow them to warm up for at least
one hour before performing calibration.
3. Make sure the IEEE-488 primary address of the Model 2303 is the same as the address
specified in the program you will be using to send commands.
4. Send the following command with the correct code to unlock calibration:
:CAL:PROT:CODE ‘<code> ’
For example, with the factory default code of KI002303, send:
CAL:PROT:CODE ‘KI002303’
5. Send the following command to initiate calibration:
:CAL:PROT:INIT
Step 2: Perform calibration steps
NOTE Allow the Model 2303 to complete each calibration step before going on to the next
one. See Detecting calibration step completion in Appendix B.
1. Connect both the OUTPUT SOURCE and DVM IN terminals to the digital multimeter,
as shown in Figure 2-2. (Connect and DVM IN + to DMM INPUT HI;
SOURCE - and DVM IN - to DMM INPUT LO.)
2. Send the following command to output 14V:
:CAL:PROT:STEP0 14
深圳德标仪器
135-1095-0799