Front-Panel Calibration Procedure; Voltage Calibration - Tektronix Keithley 2281 Series Reference Manual

Appendix C: Calibration and adjustment

Front-panel calibration procedure

To perform calibration from the front panel:
1. Turn on the instrument and allow it to warm up for at least one hour before performing the
calibration.
2. Choose any function on the startup screen.
3. Press the MENU key.
4. In the System Information menu, select Calibrate. The keypad is displayed.
5. Enter the calibration password and select OK on the keypad. The default password is KI002281.
If you forget the calibration password, you can reset your password to the factory default. For details,
refer to Change calibration password
6. The 2281S will prompt you to make connections and start to calibrate voltage and current. Refer
to the instructions on the following pages.

Voltage calibration

Connect the instrument to a digital multimeter (DMM). For details, see
(on page C-7).
You must input the measured value from the DMM. The value should be within the expected range.
A message will indicate if the DMM data entry was out of the expected range. Verify that the proper
shunt value was used or that the cables are properly connected.
For 2281S, the expected values are shown in the following table.
Steps
1
2
Step 1
1. Enter the measured result from the DMM.
2. After entering the data, the waiting window is displayed. You need to wait a few seconds for the
internal measurements and calculations. The step 2 calibration window is displayed.
C-12
Model 2281S-20-6 DC Power Supply and Battery Simulator Reference Manual
(on page C-30).
Maximum voltage
0.55 V
32 V
Voltage calibration connection
Minimum voltage
0.05 V
28 V
077114601 / March 2019