
Operating Notes
Turning on the 5725A Amplifier
3
3-7
Table 3-2. Rear Panel Features
A
CURRENT OUTPUT Binding Posts
The source of all amplified current if the 5725A is configured for rear output. You can set the
5700A to source all its unamplified as well as amplified current through these binding posts. The
LO binding post is isolated from ground when in the current function, and is open-circuited at
other times. Cable and connection recommendations are made in Section 4 of the 5700A
Operator Manual.
B
CALIBRATION Switch
A slide switch that enables and disables writing to the nonvolatile memory that stores 5725A
calibration constants. Switching to ENABLE allows writing to the memory, and switching to
NORMAL protects data in memory from being overwritten. The switch must be in the ENABLE
position to store corrections generated during calibration. The switch is recessed to allow a
metrologist to cover it with a calibration seal to guarantee calibrator integrity.
C
5700A CALIBRATOR Connector
Provides the analog and digital interface to the 5700A Calibrator. After connecting to the 5700A,
you control the 5725A from the 5700A front panel or by sending remote commands to the
5700A. Refer to "Using an Auxiliary Amplifier" in Section 4, or for remote operation to Section 5,
of the 5700A Operator Manual for details.
D
Fan Filter
Covers the air intake to keep dust and debris out of the instrument. The fan directs a constant
cooling air flow throughout the chassis.
E
Line Voltage/Fuse Rating Label
Shows the various settings of the line voltage switches, and the correct replacement fuse for
operating voltages of 110 (90 to 132) and 220 (180 to 264) volts ac. Refer to "Accessing the
Fuse" in Section 2 for the fuse replacement procedure.
F
Line Voltage Selection Switches
Select the operating line voltage. Refer to "Selecting Line Voltage" in Section 2 for instructions
on how to select operating line voltage.
G
Fuse Holder
The line power fuse. Refer to "Accessing the Fuse" in Section 2 for fuse rating information and
the fuse replacement procedure.
H
CHASSIS GROUND Connector
If the 5725A is the location of the ground reference point in a system, the CHASSIS GROUND
binding post can be used for connecting other instruments to earth ground. (The chassis is
connected to earth ground through the three-conductor line cord.)
I
Line Power Input
A grounded male three-prong connector that accepts the line power cord.
Summary of Contents for 5725A
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Page 132: ...5725A Instruction Manual 8 6 aq24f tif Figure 8 1 Final Assembly...
Page 133: ...List of Replaceable Parts 8 8 7 aq25f tif Figure 8 1 Final Assembly cont...
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Page 139: ...List of Replaceable Parts 8 8 13 aq31f tif Figure 8 1 Final Assembly cont...
Page 141: ...List of Replaceable Parts 8 8 15 5725A 1611 aq36f eps Figure 8 2 A1 Interconnect PCA...
Page 145: ...List of Replaceable Parts 8 8 19 5725A 1650 aq37f eps Figure 8 3 A2 Current Amplifier PCA...
Page 149: ...List of Replaceable Parts 8 8 23 5725A 1661 aq38f eps Figure 8 4 A3 High Voltage Amplifier PCA...
Page 153: ...List of Replaceable Parts 8 8 27 5725A 1631 aq39f eps Figure 8 5 A4 Power Supply PCA...
Page 155: ...List of Replaceable Parts 8 8 29 5725A 1650 aq40f eps Figure 8 6 A5 Digital PCA...
Page 159: ...List of Replaceable Parts 8 8 33 5725A 1601 aq41f eps Figure 8 7 A6 High Voltage Sense PCA...
Page 161: ...List of Replaceable Parts 8 8 35 aq32f tif Figure 8 8 A12 Transformer Enclosure Assembly...
Page 162: ...5725A Instruction Manual 8 36 aq33f tif Figure 8 8 A12 Transformer Enclosure Assembly cont...
Page 163: ...List of Replaceable Parts 8 8 37 aq34f tif Figure 8 8 A12 Transformer Enclosure Assembly cont...
Page 164: ...5725A Instruction Manual 8 38 aq35f tif Figure 8 8 A12 Transformer Enclosure Assembly cont...
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Page 169: ...Schematic Diagrams 9 3 9 Figure 9 1 A1 Interconnect PCA 5725A 1611 aq48f eps...
Page 170: ...5725A Instruction Manual 9 4 Figure 9 1 A1 Interconnect PCA cont...
Page 171: ...Schematic Diagrams 9 5 9 Figure 9 1 A1 Interconnect PCA cont...
Page 172: ...5725A Instruction Manual 9 6 Figure 9 2 A2 Current Amplifier PCA 5725A 1650 aq52f eps...
Page 173: ...Schematic Diagrams 9 7 9 Figure 9 2 A2 Current Amplifier PCA cont...
Page 174: ...5725A Instruction Manual 9 8 Figure 9 2 A2 Current Amplifier PCA cont...
Page 175: ...Schematic Diagrams 9 9 9 Figure 9 2 A2 Current Amplifier PCA cont...
Page 176: ...5725A Instruction Manual 9 10 Figure 9 3 A3 High Voltage Amplifier PCA 5725A 1661 aq56f eps...
Page 177: ...Schematic Diagrams 9 11 9 Figure 9 3 A3 High Voltage Amplifier PCA cont...
Page 178: ...5725A Instruction Manual 9 12 Figure 9 3 A3 High Voltage Amplifier PCA cont...
Page 179: ...Schematic Diagrams 9 13 9 Figure 9 4 A4 Power Supply PCA 5725A 1631 aq59f eps...
Page 180: ...5725A Instruction Manual 9 14 Figure 9 4 A4 Power Supply PCA cont...
Page 181: ...Schematic Diagrams 9 15 9 Figure 9 4 A4 Power Supply PCA cont...
Page 183: ...Schematic Diagrams 9 17 9 Figure 9 5 A5 Digital PCA cont...
Page 185: ...Schematic Diagrams 9 19 9 Figure 9 6 A6 High Voltage Sense PCA cont...
Page 186: ...5725A Instruction Manual 9 20 Figure 9 6 A6 High Voltage Sense PCA cont...
Page 187: ...Schematic Diagrams 9 21 9 Figure 9 6 A6 High Voltage Sense PCA cont...
Page 188: ...5725A Instruction Manual 9 22 Figure 9 6 A6 High Voltage Sense PCA cont...
Page 189: ...Schematic Diagrams 9 9 23 aq45f eps Figure 9 7 A12 Transformer Enclosure Assembly...
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