Turn-On Checkout - 4

Only perform steps 23 to 33 if you are verifying an Agilent 66309B or 66309D unit.

 

Procedure

Display

Explanation

23.

Turn the unit on. Wait for

20.025V

0.0002A

Shift Channel toggles between channel 1 and channel

 

selftest to complete and

 

 

2. The left-most digit of the display identifies the

 

press Shift, Channel.

 

 

output channel that is presently being controlled. It will

 

 

 

 

indicate a "1" for channel 1, or "2" for channel 2.

24.

Press Voltage,

2VOLT <12>

Programs the output 2 voltage to 12 volts.

 

Enter Number,

 

 

 

 

<12>, Enter.

 

 

 

25.

Press Output On/Off

212.005V

0.0002A

Turns the main output and output 2 on. The Dis

 

 

 

 

annunciator is off, but the CV annunciator is on.

26.

Press Output On/Off

20.000V

0.0000A

Turn all outputs off.

27.

Connect a jumper wire

 

 

Shorts output 2 of the unit.

 

across the + and -

 

 

 

 

terminals of output 2.

 

 

 

28.

Press Output On/Off.

20.004V

1.520A

The CC annunciator is on, indicating that output 2 is in

 

 

 

 

constant current mode. Output 2 is sourcing current at

 

 

 

 

its maximum rating, which is the default current limit

 

 

 

 

setting.

29.

Press Current,

2CURR <1>

Programs the output 2 current to 1 ampere.

 

Enter Number,

 

 

 

 

<1>, Enter.

 

 

 

30.

Press Shift, OCP

20.001V

0.0003A

You enabled the overcurrent protection circuit. The

 

 

 

 

circuit then tripped because output 2 was operating in

 

 

 

 

constant current mode. The CC annunciator turns off,

 

 

 

 

and the OCP and Prot annunciators turn on.

31.

Press Shift, OCP

20.001V

0.0003A

You have disabled the overcurrent protection circuit.

 

 

 

 

The OCP annunciator turns off.

32.

Press Shift, Prot Clear

20.004V

0.998A

Restores output 2. The Prot annunciator turns off. The

 

 

 

 

CC annunciator turns on.

33.Turn the unit off and remove the shorting wire from the output terminals.

The next time the unit turns on it will be restored to the *RST or factory default state.

In Case of Trouble

Dc source failure may occur during power-on selftest or during operation. In either case, the display may show an error message that indicates the reason for the failure.

Selftest Error Messages

Pressing the Shift, Error keys will show the error number. Selftest error messages appear as: ERROR <n> where "n" is a number listed in the following table. If this occurs, turn the power off and then back on to see if the error persists. If the error message persists, the dc source requires service.

47

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Agilent Technologies 66111A, D, 66311B, 66309B manual Case of Trouble, Selftest Error Messages, Press Shift, Channel
Page 46 Page 48

66111A, 66309B, 66311B, D specifications

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