Remote Calibration Procedure - Keithley 2425 Service Manual

2-20 Calibration
Table 2-7
Recommended :CALibration:PROTected:SOURce parameter ranges
First parameter
Source range (negative full scale)
0.2V -0.18 to -0.22
2V -1.8 to -2.2
20V -18 to -22
100V -90 to -110
10μA -9E-6 to -11E-6
100μA -90E-6 to -110E-6
1mA -0.9E-3 to -1.1E-3
10mA -9E-3 to -1E-3
100mA -90E-3 to -110E-3
1A -0.9 to -1.1
3A -2.7 to -3.15
Note: Parameter steps for each range may be performed in any order, but all parameter steps for each range must be completed. For
optimum calibration, use parameters within recommended limits.

Remote calibration procedure

Step 1: Prepare the Model 2425 for calibration.
1.
2.
3.
Step 2: Voltage calibration.
1.
2.
Second parameter
(negative zero)
-0.002 to +0.002
-0.02 to +0.02
-0.2 to +0.2
-1 to +1
-1E-7 to +1E-7
-1E-6 to +1E-6
-1E-5 to +1E-5
-1E-4 to +1E-4
-1E-3 to +1E-3
-1E-2 to +1E-2
-3E-2 to +3E-2
Connect the Model 2425 to the controller IEEE-488 interface or RS-232 port using
a shielded interface cable.
Turn on the Model 2425 and the test equipment, and allow them to warm up for at
least one hour before performing calibration.
If you are using the IEEE-488 interface, make sure the primary address of the
Model 2425 is the same as the address specified in the program you will be using
to send commands. (Use the MENU key and the COMMUNICATION menu to
access the IEEE-488 address.)
Connect the Model 2425 to the digital multimeter, and select the multimeter DC
volts function. (Figure 1-2).
Send the commands summarized in Table 2-8 in the order listed to initialize volt-
age calibration. (When the :CAL:PROT:CODE command is sent, the instrument
will assume the operating states listed in Table 2-2.)
Model 2425 Service Manual
Third parameter
(positive full scale)
+0.18 to +0.22
+1.8 to +2.2
+18 to +22
+90 to +110
+9E-6 to +11E-6
+90E-6 to +110E-6
+0.9E-3 to +1.1E-3
+9E-3 to +11E-3
+90E-3 to +110E-3
+0.9 to +1.1
+2.7 to +3.15
Fourth parameter
(positive zero)
-0.002 to +0.002
-0.02 to +0.02
-0.2 to +0.2
-1 to +1
-1E-7 to +1E-7
-1E-6 to +1E-6
-1E-5 to +1E-5
-1E-4 to +1E-4
-1E-3 to +1E-3
-1E-2 to +1E-2
-3E-2 to +3E-2