Verification 13
Programming
You can program the supply from the front panel keyboard or from a GPIB controller (for models 664xA and 665xA) when
performing the tests. The test procedures are written assuming that you know how to program the supply either; remotely
from a GPIB controller (for 664xA and 665xA models), or locally using the control keys and indicators on the supply’s front
panel. For models 654xA and 655xA you must use the front panel. Complete instructions on remote and local programming
are given in the Operating Manual.
Constant Voltage (CV) Tests
CV Setup
If more than one meter or if a meter and an oscilloscope are used, connect each to the terminals by a separate pair of leads to
avoid mutual coupling effects. For constant voltage DC tests, connect only to +S and -S, since the unit regulates the output
voltage that appears bS and -S, and not between the (+) and (-) output terminals. Use coaxial cable or shielded
two-wire cable to avoid noise pickup on the test leads.
Voltage Programming and Readback Accuracy
This test verifies that the voltage programming, GPIB readback (on 664xA and 665xA models), and front panel display
functions are within specifications. Note that the values read back over the GPIB should be identical to those displayed on
the front panel.
a.
Turn off the supply and connect a digital voltmeter between the +S and the -S terminals as shown in Figure 2-1.
b.
Turn on the supply and program the supply to zero volts and the maximum programmable current (see Table 2-3) with
the load off.
c.
Record the output voltage readings on the digital voltmeter (DVM) and the front panel display. The readings should be
within the limits specified in the performance test record form for the appropriate model under CV PROGRAMMING
@ 0 VOLTS. Also, note that the CV annunciator is on. The output current reading should be approximately zero.
d.
Program the output voltage to full-scale (see Table 2-3).
e.
Record the output voltage readings on the DVM and the front panel display. The readings should be within the limits
specified in the performance test record form for the appropriate model under CV PROGRAMMING @ FULL
SCALE.
Table 2-3. Voltage and Current Values
Agilent
Model
Full-Scale
Voltage
Max. Prog.
Voltage
Full-Scale
Current
Max. Prog.
Current
Max. Prog.
Overvoltage
200 Watt Supplies
6541A, 6641A
8 V
8.190 V
20 A
20.475 A
8.8 V
6542A, 6642A
20 V
20.475 V
10 A
10.237 A
22 V
6543A, 6643A
35 V
35.831 V
6 A
6.142 A
38.5 V
6544A, 6644A
60 V
61.425 V
3.5 A
3.583 A
66.0 V
6545A, 6645A
120 V
122.85 V
1.5 A
1.535 A
132 V
500 Watt Supplies
6551A, 6651A
8 V
8.190 V
50 A
51.188 A
8.8 V
6552A, 6652A
20 V
20.475 V
25 A
25.594 A
22 V
6553A, 6653A
35 V
35.831 V
15 A
15.536 A
38.5 V
6554A, 6654A
60 V
61.425 V
9 A
9.214 A
66.0 V
6555A, 6655A
120 V
122.85 V
4 A
4.095 A
132 V
Summary of Contents for 6541A
Page 12: ...12 Verification Figure 2 1 Basic Test Setup CV TESTS CV TESTS ...
Page 18: ...18 Verification Figure 2 3 CC RMS Noise Measurement Test Setup ...
Page 30: ......
Page 32: ...32 Troubleshooting Figure 3 1 Top View with Cover Removed for 655xA 665xA Models Sheet 1 of 2 ...
Page 33: ...Troubleshooting 33 Figure 3 1 Top View with Cover Removed for 655xA 665xA Models Sheet 2 of 2 ...
Page 37: ...Troubleshooting 37 Figure 3 2 Overall Troubleshooting Flow Diagram Sheet 1 of 4 ...
Page 38: ...38 Troubleshooting Figure 3 2 Overall Troubleshooting Flow Diagram Sheet 2 of 4 ...
Page 39: ...Troubleshooting 39 Figure 3 2 Overall Troubleshooting Flow Diagram Sheet 3 of 4 ...
Page 40: ...40 Troubleshooting Figure 3 2 Overall Troubleshooting Flow Diagram Sheet 4 of 4 ...
Page 51: ...Troubleshooting 51 Figure 3 5 No Display Troubleshooting ...
Page 52: ...52 Troubleshooting Figure 3 6 OV Will Not Fire Troubleshooting ...
Page 53: ...Troubleshooting 53 Figure 3 7 OV At Turn On Troubleshooting Sheet 1 of 2 ...
Page 54: ...54 Troubleshooting Figure 3 7 OV At Turn On Troubleshooting Sheet 2 of 2 ...
Page 55: ...Troubleshooting 55 Figure 3 8 Output Held Low Troubleshooting Sheet 1 of 2 ...
Page 56: ...56 Troubleshooting Figure 3 8 Output Held Low Troubleshooting Sheet 2 of 2 ...
Page 57: ...Troubleshooting 57 Figure 3 9 Output Held High Troubleshooting ...
Page 58: ...58 Troubleshooting Figure 3 10 DAC Circuits Troubleshooting ...
Page 60: ...60 Troubleshooting Figure 3 13 Serial Down Troubleshooting Sheet 1 of 2 ...
Page 61: ...Troubleshooting 61 Figure 3 13 Serial Down Troubleshooting Sheet 2 of 2 ...
Page 62: ...62 Troubleshooting Figure 3 14 Secondary Down Troubleshooting Sheet 1 of 2 ...
Page 63: ...Troubleshooting 63 Figure 3 14 Secondary Down Troubleshooting Sheet 2 of 2 ...
Page 64: ...64 Troubleshooting Figure 3 15 Slow Down Programming Troubleshooting ...
Page 65: ...Troubleshooting 65 Figure 3 16 Isolator Board Circuits Troubleshooting ...
Page 80: ......
Page 87: ...Principles of Operation 87 Figure 4 4 Output Power and Control Circuits ...
Page 94: ......
Page 136: ......
Page 145: ...Figure 6 1 Power Supply Interconnection Diagram for All Models ...
Page 146: ...Figure 6 2 AC Power Distribution Diagram for 655xA 665xA Models ...
Page 147: ...Figure 6 3 GPIB Board Assembly Diagram sheet 1 of 2 ...
Page 148: ...2 3 4 1 6 5 7 8 Figure 6 3 GPIB Board Schematic Diagram sheet 2 of 2 ...
Page 149: ...Figure 6 4 Front Panel Board Assembly Diagram sheet 1 of 2 ...
Page 150: ...Figure 6 4 Front Panel Board Schematic Diagram sheet 2 of 2 ...
Page 152: ...Figure 6 5 A1 Main Board Assembly Diagram for 654xA 664xA Models Only ...
Page 160: ...Figure 6 6 Left Tunnel Circuits Schematic Diagram for 654xA 664xA Models Only sheet 2 ...
Page 162: ...Figure 6 7 Right Tunnel Circuits Schematic Diagram for 654xA 664xA Models Only sheet 2 ...
Page 164: ......
Page 168: ......
