Agilent Technologies 664xA, 665xA, 667xA, 668xA, AGILENT Model 6653A: 3145A-00551, Model 6641A: 3217A-00111, Model 6645A: 3215A-00111, Model 6651A: 3130A-00171, Model 6652A: 3201A-00381, Model 6654A: 3148A-00391, Model 6655A: 3152A-00176, Model 6671A: 3129A-00218, Model 6672A: 3138A-00101, Model 6673A: 3138A-00101, Model 6674A: 3133A-00161, Model 6675A: 3138A-00101, Model 6680A: 3302A-00101, Model 6681A: 3250A-00101, Model 6682A: 3339A-00101, Model 6683A: 3339A-00161, Model 6684A: 3339A-00101

Turn-On Checkout 51

Checking the Voltage Function (All Models)

The tests in Table 3-1 check the basic voltage functions with no load connected to the power supply. The VOLTS display

will show various readings. Ignore the AMPS display.

Table 3-1. Checking the Voltage Functions (Output Terminals Open)

Procedure Display Explanation

Output Terminals Open or Connected to a Voltmeter

If Dis is on, turn it off by pressing

Press key VOLT 0.000 Default voltage setting. CV annunciator should be on. (If CC annunicator

is on, increase the current by pressing one or more times until

CC turns off and CV turns on.)

Press

VOLT 4 Program output to 4 volts.

Press 4.000 Enter the voltage. Meter mode displays output voltage. During these

tests, there may be a small (relative to full output) AMPS reading that

will be ignored.

Press several

times

Voltage decreases several millivolts each time you press the key.*

Press the same

number of times

Voltage increases several millivolts each time you press the key.*

* The number of millivolts change is determined by the voltage programming resolution of

your power supply (see "Supplemental Characteristics" in Chapter 1).

Rotate Voltage control first

counterclockwise and then

clockwise

Control operates similarly to and keys. The control

is rate sensitive. Turning it more quickly causes a more rapid change in

voltage.

Press 4.000 Program output to 4 volts.

Press Display shows default OVP (overvoltage protection) trip voltage for your

supply (see "Supplemental Characteristics" in Chapter 1).

Press OV 3 Program the OVP to 3 volts, which is less than the output voltage.

Press 0.000 OVP voltage entered is less than the output voltage. This causes the OVP

circuit to trip. The output drops to zero, CV turns off, and Prot turns on.

Press OV - - - - - Shows that the power supply shuts down because the OVP circuit has

tripped.

Press Return display to meter mode (optional step).

Press

0.000 Program the OVP to 4.5 volts, which is greater than the output voltage.

Note: You cannot clear an OVP trip until you have first removed the

cause of the condition.

Press Prot Clear

( )* 4.000 The OVP circuit is cleared, restoring the output. Prot turns off and CV

turns on.

* is the unlabeled blue key.