Keithley SourceMeter 2400, Service Manual, Page: 32 / 137

Model 2400 Service Manual 2-4
Calibration
2400-902-01 (G - Feb 2006)
Recommended calibration equipment
Table 2-1 lists the recommended equipment for the calibration procedures. You can use
alternate equipment as long as that equipment has specifications at least as good as those listed
in the table. When possible, test equipment specifications should be at least four times better
than corresponding Model 2400 specifications.
Table 2-1
Recommended calibration equipment
Description Manufacturer/Model Accuracy*
Digital Multimeter Hewlett Packard
HP3458A DC voltage 200mV:
2V
20V:
200V: ±15ppm
±6ppm
±9ppm
±7ppm
DC current 1µA:
10µA:
100µA:
1mA:
10mA:
100mA:
1A: ±55ppm
±25ppm
±23ppm
±20ppm
±20ppm
±35ppm
±110ppm
*90-day specifications show accuracy at specified measurement point.
Unlocking calibration
Before performing calibration, you must first unlock calibration by entering or sending the
calibration password as follows:
Front panel calibration password
1. Press the MENU key, then choose CAL, and press ENTER. The instrument will display
the following:
CALIBRATION
UNLOCK EXECUTE VIEW-DATES
©
ß
SAVE LOCK CHANGE-PASSWORD
2. Select UNLOCK, and then press ENTER. The instrument will display the following:
PASSWORD:
Use
ß
,
©
,
¹
,
ƒ
, ENTER, or EXIT.
3. Use the up and down RANGE keys to select the letter or number, and use the left and
right arrow keys to choose the position. (Press down RANGE for letters; up RANGE
for numbers.) Enter the current password on the display. (Front panel default: 002400.)