Model 2500 Service Manual Calibration 2-9
3. Use the EDIT and keys to select the letter or number, and use the and
arrow keys to choose the position. (Press EDIT for letters; for numbers.)
Enter the present password on the display. (Front panel default: 002500.)
4. Press ENTER to complete the process.
5. Press EXIT to return to normal display.
Step 2. Input offset voltage calibration
1. Install a triax shielding cap on both INPUT jacks.
2. Select OFFSET from the CAL EXECUTION menu, then press ENTER. The unit
will display:
CURRENT OFFSET CAL
Input 0A then press ENTER
3. Press ENTER to complete input voltage calibration.
NOTE This step calibrates offset voltage for both channels.
Table 2-3
Front panel calibration summary
Function
1
Calibration step
2
Test connections
OFFSET INPUT offset voltage
calibration
Channel 1 and channel 2 INPUT jacks left open (capped).
V-CAL
CHAN-1
CHAN-2
Voltage bias calibration
Channel 1 calibration
Positive full scale output
Zero output
Negative full scale output
Channel 2 calibration
Positive full scale output
Zero output
Negative full scale output
DMM to channel 1 OUTPUT and INPUT jacks (Figure 2-1)
DMM to channel 1 OUTPUT and INPUT jacks (Figure 2-1)
DMM to channel 1 OUTPUT and INPUT jacks (Figure 2-1)
DMM to channel 2 OUTPUT and INPUT jacks (Figure 2-2)
DMM to channel 2 OUTPUT and INPUT jacks (Figure 2-2)
DMM to channel 2 OUTPUT and INPUT jacks (Figure 2-2)
I-CAL
CHAN-1
CHAN-2
Current calibration
Channel 1 calibration
Positive full scale input
Zero input
Negative full scale input
Channel 2 calibration
Positive full scale input
Zero input
Negative full scale input
Calibrator to channel 1 INPUT jack (Figure 2-3)
Calibrator to channel 1 INPUT jack (Figure 2-3)
Calibrator to channel 1 INPUT jack (Figure 2-3)
Calibrator to channel 2 INPUT jack (Figure 2-4)
Calibrator to channel 2 INPUT jack (Figure 2-4)
Calibrator to channel 2 INPUT jack (Figure 2-4)
1
CAL EXECUTION menu selections.
2
Steps repeated separately for each range.
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