User`s guide

25
3
Installation
Installation and Operation Checklist
Check the Output Compensation
¨ Check that the output compensation of the dc source is appropriate for your application. Refer to
“Output Compensation” in this chapter.
High mode provides the best transient response and can be used with phones having input capacitances
from 5 to 12000µF. Note that if the last two digits on the front panel display are fluctuating when the
phone is in standby, you may want to set the output compensation to Low mode.
Low mode is used when testing phones having input capacitances from 0 to 12000µF. Standard dc
sources are factory-set to Low mode.
Check the Phone Connections
¨ If you are remote sensing, is the sense switch on the back of the dc source in the Remote
position? Remote sensing is recommended for most applications. Push the switch out for remote sensing.
Attempting to operate the unit with the switch in the out position without connecting the sense leads may
result in an overvoltage or remote sense detect shutdown. Refer to “Remote Sensing” in this chapter.
¨ If you are remote sensing, are the + and −
−−
− sense leads connected ONLY at the test fixture and
within 20 inches of the phone contacts? For best performance, the distance from sense lead termination
to the phone contacts should be as short as possible. Refer to “Lead Resistance” in this chapter.
Check the Operating Settings and Conditions
¨ Are you able to communicate remotely with the dc source? If not, check that the address setting
and the programming language are set correctly. Refer to “GPIB Address” and “Language setting” in
chapter 5.
¨ Is the Prot or Err annunciator on the front panel on? If yes, clear the fault condition before
continuing. Refer to “Clearing Protection” in chapter 5.
¨ Is the Overvoltage circuit shutting the unit down? If yes, you can disable the overvoltage circuit.
Refer to “Clearing Protection” in chapter 5.
¨ Are the front panel readings unstable? If yes, check that the front panel sampling rate is correct.
Also check the setting of the output compensation. Refer to “Front Panel Measurements” in chapter 5
and “Output Compensation” in this chapter.
Additional Agilent 66311B Operating Settings Checks
¨ Are you measuring dynamic output currents? If yes, check that the current detector is set to
ACDC. Refer to “Front Panel Measurements” in chapter 5.
¨ Are you measuring output currents under 20 mA? If yes, check that the current range is set to
LOW. Refer to “Front Panel Measurements” in chapter 5.