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 49

Turn-On Checkout

Note This chapter provides a preliminary introduction to the power supply front panel. See "Chapter 5 - Front

Panel" for more details.

Introduction

Successful tests in this chapter provide a high degree of confidence that the power supply is operating properly. For

verification tests, see “Appendix B - Operation Verification”. Complete performance tests are given in the service manual

(see Table 1-5 in Chapter 1). Do not apply ac power to the power supply until told to do so.

Preliminary Checkout (All Models)

1. Make certain that the front panel switch is off.

2. Examine the Line Voltage Rating or Line And Fuse Rating label (see "Chapter 2 - Installation" )

a. Verify that the line voltage rating agrees with your power source. If it does not, see "Appendix C - Line Voltage

Conversion".

b. Series 664xA/665xA - Use a screwdriver to remove the line fuse from the fuseholder (3, Figure 2-1). Verify that

the fuse is as specified on the label. Replace the fuse.

c. Series 668xA - Unscrew the fuse caps from the rear panel (2, Figure 2-4). Verify that the fuse is as specified on

the label. Replace the fuse.

3. Check the sense wiring as follows:

a. Series 664xA/665xA - The SENSE switch (4, Figure 4-3a) is set to Local.

b. Series 667xA - Remove the output safety cover (1, Figure 4-4a) and examine the output sense terminals (4 and

5). They should be wired for local sensing as follows:

1. The +LS sense terminal wired to the +S terminal of the analog connector (2).

2. The -LS sense terminal wired to the -S terminal of the analog connector.

3. If the power supply is not wired for local sensing, make the above connections, using small-capacity wire

(#22 is sufficient).

c. Series 668xA - Examine the output bus bars (Figure 4-5a) and make sure they are connected for local sensing as

follows:

1. The + bar is wired to the +S terminal of the analog connector.

2. The - bar is wired to the -S terminal of the analog connector.

3. If the power supply is not wired for local sensing, make the above connections, using small-capacity wire

(#22 is sufficient).

4. Make sure that there is no load connected to the output terminals or bus bars.