Agilent Technologies E4351B Water Heater User Manual


 
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