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Set the output compensation
Action
1.
On the Function keypad, press Output. Then press
TYPE:CAP command. Use the
Enter. Use HIGH compensation for phones with input capacitances greater than
5 µF. Use LOW compensation for phones with input capacitances under 5 µF.
Enable the output
Action
1.
On the Function keypad, press Output On/Off to enable the output. The Dis
annunciator will go off, indicating that the voltage is now applied to the output
terminals. The A display indicates the actual output current.
2 - Querying and Clearing Output Protection and Errors
If an overvoltage, overcurrent, overtemperature or remote inhibit condition occurs, the Prot annunciator
on the front panel will be on and the dc source will disable its output. If necessary, you can disable the
overcurrent or overvoltage protection circuit if its operation interferes with the proper operation of your
phone test. Note that if you disable the overvoltage protection, the equipment under test will not be
protected from output voltage overshoot conditions.
Error messages can occur at any time during the operation of the unit. When the Err annunciator on the
front panel is on it means that either an error has occurred on the HP-IB bus, or a selftest error has
occurred. Appendix C lists error numbers and descriptions.
Query and clear the dc source overcurrent protection as follows:
Action
1.
On the Function keypad, press Protect. In this example, OC indicates that an
overcurrent condition has occurred. Other protection indicators are: OT
(overtemperature), OV (overvoltage), and RI (remote inhibit).
2.
On the Function keypad, press Current. This displays the present current limit.
3.
To restore normal operation after the cause of the overcurrent condition has been
removed, press Shift, Prot Clr. The Prot annunciator then will go off.
4.
To disable overcurrent protection, press Shift, OCP. This key toggles between OCP
enabled and disabled. The OCP annunciator is off when OCP is disabled.
Disable Overvoltage Protection as follows:
1.
On the Function keypad, press press Shift, OV. Then press
PROT:STAT command. Use the
protection function. Then press Enter. To recall this state when the unit is powered
on, save this instrument setup or state in location 0 as explained in example #6.
Query and Clear Errors as follows:
1.
On the Function keypad, press press Shift, Error. This displays and clears the error
in the error queue. Repeatedly press these keys to clear all errors in the queue. If
errors persist, your unit may require service.
until you obtain the
key and select either LOW or HIGH. Then press
key and select OFF to disable the overvoltage
Front Panel Operation - 5
Display
TYPE:CAP HIGH
Display
8.003V 0.500A
Display
OC -- -- -- --
CURR 3.0712
PROT:STAT OFF
to obtain the
ERROR 0
41
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