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Verification and Calibration 107
Current Programming and Readback Accuracy
This test verifies that the current programming and readback are within specification. Connect the appropriate current
monitoring resistor (see Table B-1) as shown in Figure B-1(2). The accuracy of the resistor must be as specified in the table.
Table B-3. Current Programming and Readback Accuracy Test
Action Normal Result
1 Turn off the Agilent SAS and connect the current monitoring
resistor as shown in Figure B-1(2). Be certain to use wire of
sufficient size to carry the maximum rated current of the
supply (see Table 4-1 in Chapter 4).
2 Connect a DVM across the resistor.
3 Turn on the Agilent SAS and program the output for 5 volts
and 0 amperes.
4
Disable the output (
)
5
Enable the output
(or send OUTPut ON).
6 Observe the voltage reading of the voltmeter. Divide this by
the resistance of the current monitor resistor. Record the result
as the Low Current value (I
DVM
) in Table B-4.
Value within Low Current limits (see Table B-4 for
either Agilent E4350B or Agilent E4351B).
7 Record the front panel display readback (I
FP
) in Table B-4. Value within specified readback limits (see Table
B-4 for either Agilent E4350B or Agilent E4351B).
8 Program output current to full scale (either 8 A or 4A).
9 Repeat Steps 6 and 7. Both current readings within specified High Current
and readback limits (see Table B-4 for either
Agilent E4350B or Agilent E4351B).
10
Disable the output (
).
11
Remove the short from across the load.
Table B-4. Operation Verification Test Parameters
Test Description Minimum Spec Results * Maximum
Spec
Measurement
Uncertainty
MODEL Agilent E4350B
Voltage Programming and Readback
Low Voltage (0 V) -10 mV V
DVM =
______ mV +10 mV
2.0
µ
V
Front Panel Display Readback V
DVM
-42 mV V
FP =
______ mV V
DVM
+42 mV
2.0 µV
High Voltage ( 60 V) 59.945 V V
DVM =
______ V 60.055 V
845 µV
Front Panel Display Readback V
DVM
-90 mV V
FP =
______ mV V
DVM
+90 mV
845 µV
Current Programming and Readback
Low Current (0 A) -20 mA I
DVM =
______ mA +20 mA
16 µA
Front Panel Display Readback I
DVM
-28 mA I
FP =
______ mA I
DVM
+28 mA
16 µA
High Current (8 A) 7.964 A I
DVM =
______ A 8.036 A 2.5 mA
Front Panel Display Readback I
DVM
-44 mA I
FP =
______ mA I
DVM
+44 mA 2.5 mA