Model 2400 Service Manual 2-8
Calibration
2400-902-01 (G - Feb 2006)
Front panel calibration
The front panel calibration procedure described in the following paragraphs calibrates all
ranges of both the current and voltage source and measure functions. Note that each function is
separately calibrated by repeating the entire procedure for each range.
Step 1. Prepare the Model 2400 for calibration
1. Turn on the Model 2400 and the digital multimeter, and allow them to warm up for at
least one hour before performing calibration.
2. Press the MENU key, then choose CAL, and press ENTER. 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 keys to select the letter or number, and use the left and right arrow
keys to choose the position. Enter the present password on the display. (Front panel
default: 002400.) Press ENTER to complete the process.
4. Press EXIT to return to normal display. Instrument operating states will be set as sum-
marized in Table 2-2.
Step 2. Voltage calibration
Perform the steps below for each voltage range, using Table 2-3 as a guide.
1. Connect the Model 2400 to the digital multimeter, as shown in Figure 2-1. Select the
multimeter DC volts measurement function.
NOTE The 2-wire connections shown assume that remote sensing is not used. Remote sens-
ing may be used, if desired, but it is not essential when using recommended digital
multimeter.
2. From normal display, press the SOURCE V key.
3. Press the EDIT key to select the source field (cursor flashing in source display field),
and then use the down RANGE key to select the 200mV source range.
4. From normal display, press MENU.
5. Select CAL, and then press ENTER. The unit will display the following:
CALIBRATION
UNLOCK EXECUTE VIEW-DATES ©
ß SAVE LOCK CHANGE-PASSWORD
6. Select EXECUTE, and then press ENTER. The instrument will display the following
message:
V-CAL
Press ENTER to Output +200.00mV
7. Press ENTER. The Model 2400 will source +200mV and simultaneously display the
following:
DMM RDG: +200.0000mV
Use ß, ©, ¹, ƒ, ENTER, or EXIT.
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