Query and Clear Errors as follows | Agilent Technologies 66111A, D

Front Panel Operation - 5

3. To make minor changes to an existing value: On the Function keypad, press Current. 2 CURR 0.500 On the Entry keypad, press ∅ or ∩ to select the digit in the numeric field that you wish

to change. For example, move the flashing digit to the tenths column to change a value in this column. Then press ∪ to scroll from 0.400 to 0.500. Then press Enter.

NOTE: To draw current pulses greater than 1.5 A and up to 2.5 A peak on output 2, set the output current limit higher than 1.5 amperes (1.52 amperes max). Do not enable OCP, or else make sure that the protection delay setting is longer than the expected current pulse.

Enable the output

	Action	Display
1.	On the Function keypad, press Output On/Off to enable output 2. The Dis	2 8.003V 0.500A

annunciator will go off, indicating that the voltage is now applied to the output terminals. The display indicates the actual output values. Note that when the outputs are coupled, this command also enables or disables output 1.

4 - 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. You can also disable the broken sense lead detect circuit if you have an application where an external voltage applied to the output may interfere with the broken sense lead detect circuitry.

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 GPIB 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	Display
1.	On the Function keypad, press Protect. In this example, an over current condition has	OVERCURRENT
	occurred. Refer to Table 4-2 for other protection indicators.
2.	On the Function keypad, press Current. This displays the present current limit.	CURR 3.0712

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 Shift, OV. Then press θ to obtain the PROT:STAT	PROT:STAT OFF
command. Use the ⊃ key and select OFF to disable the overvoltage protection
function. Then press Enter. To recall this state when the unit turns on, save this state
in location 0 and set the power-on state to RCL 0 (see example #10).

Query and Clear Errors as follows:

1. On the Function keypad, press Shift, Error. This displays and clears the error in the ERROR 0 error queue. Repeatedly press these keys to clear all errors in the queue. If errors

persist, your unit may require service.

66111A, 66309B, 66311B, D specifications

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Agilent Technologies 66111A, D Querying and Clearing Output Protection and Errors, Overcurrent

Models: 66111A 66309B 66311B D