User Manual

Appendix B: Calibration Series 2200 Programmable DC Power Supplies Reference Manual
B-14 2200S-901-01 Rev. A/November 2011
4. If any of the messages listed in the following table appear in the display, it indicates that the
EEPROM is experiencing the condition associated with the message.
5. If there is no response when you power on the DUT, verify that there is AC power to the power
supply, verify the power-line voltage settings, and verify that the correct power-line fuse is
installed. If you need more help, contact Keithley.
6. Power off the DUT.
Display shows
EEPROM Condition
ERREEPROM
EEPROM is damaged or the latest operation data in the EEPROM is missing
ERROR CAL
Calibration data in the EEPROM is missing
Error Config Data
Operating state of the power supply in the EEPROM is missing
Check DC voltage accuracy with remote sense
Equipment required
(Item 2) AC Power Source
(Item 5) High current hook up wire (bold line connections)
(Item 3) Electronic Load
(Item 6) Low current hook up wire (fine line connections)
(Item 4) DC Voltmeter
(Item 9) 0.050  5 W Resistor (Qty 2)
1. Power off the DUT.
2. Remove the shorting clip (that connects the Output Sense to the Output Drive connections) from
the Remote Sense connector on the rear panel.
3. Set up the equipment as shown in the following figure.
To assure accurate measurements, it is important that a significant amount of current does not flow
through the sense leads. For this reason, we recommend that the wiring of the remote sense and the
voltmeter be away from the high current connections between the electronic load and the DUT.
A solution is a pair fork lugs with all three wires crimped in. Another alternative is a fork lug between
the DUT and the load, and separate connections (probably also fork lugs) holding the wiring for one
or both of the voltmeter and remote sense. A third alternative is to stack banana jacks at the
voltmeter, with the remote sense toward the voltmeter, and the two high current connections on the
outside.