Agilent Technologies E4356A manual Current Programming and Readback Accuracy

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 C-1) as shown in Figure C-1(2). The accuracy of the resistor must be as specified in the table.

Table C-3. Current Programming and Readback Accuracy Test

1

2

3

4

5

6

7

Action

Turn off the power supply and connect the current monitoring resistor as shown in Figure C-1(2). Be certain to use wire of

sufficient size to carry the maximum rated current of the unit (see Table 7-1 in Chapter 7).

Connect a DVM across the resistor at the monitoring terminals.

Turn on the power supply and program the output for 5V, 0A.

Disable the output ( )

Enable the output or OUTP ON).

Observe the DVM voltage reading. Divide this by the resistance of the current monitor resistor. Record the result as the Low Current value in applicable test table.

Record the front panel display readback

Normal Result

Value within Low Current limits (see applicable test table).

Value within specified readback limits (see applicable test table).

8

9

10

11

Program output current to full scale.

Repeat Steps 6 and 7.

Disable the output ( ).

Remove the short from across the load.

Both current readings within specified High Current and readback limits (see applicable test table).

Table C-4. Operation Verification Test Parameters

Test Description

Minimum Spec

Results *

Maximum Spec

Measurement Uncertainty

Low Voltage (0 V) Vout

Front Panel Display Readback

High Voltage ( 80 V) Vout

Front Panel Display Readback

Low Current (0 A) Iout

Front Panel Display Readback

High Current (30 A) Iout

Front Panel Display Readback

Voltage Programming and Readback

-80 mV	____________ mV
Vout -120 mV	____________ mV
79.888 V	_____________V
Vout -160 mV	____________ mV
Current Programming and Readback
-25 mA	____________ mA
Iout -35 mA	____________ mA
29.945 A	____________ A
Iout -65 mA	____________ mA

+80 mV Vout +120 mV

80.112 V

Vout +160 mV

+25 mA

Iout +35 mA

30.055 A

Iout +65 mA

2.2μV

2.2μV 1 mV 1 mV

21μA

21μA

15 mA

15 mA

* Enter your test results in this column.

Verification 107