Keithley 2303, Руководство по обслуживанию, Страница: 43 / 104

2-18 Calibration
Model 2303-PJ remote calibration procedure
Follow the steps below to calibrate the Model 2303-PJ via remote. Table 2-6 summarizes
these 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-PJ for calibration
1. Connect the Model 2303-PJ to the controller IEEE-488 interface using a shielded inter-
face cable.
2. Turn on the Model 2303-PJ 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-PJ 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-PJ 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
NOTE At this point, the source output is turned on and will remain on until calibration is
completed or aborted with the :CAL:PROT:LOCK command.
3. Note and record the DMM reading, then send that reading as the parameter for the fol-
lowing command:
:CAL:PROT:STEP1 <DMM_Reading>
For example, if the DMM reading is 14.012V, the command would be:
:CAL:PROT:STEP1 14.012
4. Note and record a new DMM reading, then send that reading as the parameter for the
following command:
:CAL:PROT:STEP2 <DMM_Reading>
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