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 50

Power-On Checkout (All Models)

1. Connect the power cord to the power source (for Series 668xA, turn on the safety disconnect switch).

2. Turn the front panel power switch to ON (1).

3. For Series 668xA only, the Check Fuses and Dew LEDs should remain off. If either light is on or is blinking, go to

“In Case of Trouble” at the end of this chapter.

4. The power supply undergoes a self-test when you turn it on. If the test is normal, the following sequence appears on

the LCD:

a. Series 664xA/665xA - The GPIB address (factory default is 5).

b. Series 667xA/668xA - The GPIB address (factory default is 5). This is then followed by PWR ON INIT for

approximately 10 seconds.

5. The display then goes into the meter mode with the Dis annunciator on and all others off. “Meter mode” means that

the VOLTS digits indicate the output voltage and the AMPS digits indicate the output current. These values will be at or

near zero.

6. Verify that the power supply fan is on by placing your hand near the rear grill to feel the air flow. You may also be

able to hear the fan operating.

7. Press once. The Dis annunciator will go off and the CV annunciator will go on .

Note If the power supply detects an error during self-test, the display will show an error message. Go to “In

Case of Trouble” at the end of this chapter.

Using The Keypad (All Models)

Shifted Keys

Some of the front panel keys perform two functions, one labeled in black and the other in blue. You access the blue function

by first pressing the blue key, which is not labeled. When the Shift annunciator is on, you will know you have access

to the key's shifted (blue) function.

Backspace Key

The key is an erase key. If you make a mistake entering a number and have not yet entered it (have not pressed

), you can delete the number by pressing . You may delete as many numbers as you wish by repeatedly pressing

this key.

Output Checkout (All Models)

Important When the power supply is turned on, it asserts the state stored in EEPROM memory location 0.

For a new supply, this is the factory default (*RST) state. The following procedures assume that the

factory default state is still in location 0 (Turn-On Conditions in “Chapter 5 - Front Panel” for details).