B - Verification and Calibration
5.Set the output current to its full scale value (see Table
6.Divide the voltage drop across the current monitor by its resistance to convert the value to amperes. Record this value and the current reading on the front panel display.
Current Measurement (Low Range)Action
7.Turn off the dc source and connect it as shown in figure
8.Turn on the dc source, access the Input menu, and set the current range to LOW.
9.Set the output voltage to 0 V and the current to its full scale value (see table
10.Record the current reading from the DMM as well as from the front panel display. Enter the difference between the two readings in the appropriate table.
11.Set the output voltage to 8 volts.
12.Record the current reading from the DMM as well as from the front panel display. Enter the difference between the two readings in the table.
Readings within high current limits (see tables
Normal Result
CURR:RANG LOW
Output current near 0 A.
Readings within low current measurement (see table
Output current near +20 mA.
Readings within high current measurement (see table
Action | Normal Result |
13.Turn off the dc source and connect an external supply to the output of the unit as shown in figure
14. | Turn on the dc source, access the Input menu, and set the | CURR:RANG LOW |
| current range to LOW. |
|
15. | Access the Input menu and set the current sense detector to DC. | CURR:DET DC |
16. | Turn on the external supply and program its’output for 8 volts | Output current near − 20 mA. |
| and 1 A. Program the dc source to 0 V and 1 A. Press Output |
|
| On/Off to enable the output. |
|
17. | Record the current reading from the DMM as well as from the | Readings within low current |
| front panel display. Enter the difference between the two | sink measurement |
| readings in the table. | (see table |
18.Turn off the dc source and connect the current monitor and external supply to the output of the unit as shown in figure B- 1D. Set the DMM to operate in dc voltage mode.
19. | Turn on the external supply and program its’voltage to 5 volts | Output near − full scale current. |
| and current for the full scale current rating of the UUT. Program |
|
| the dc source to 0 V and full scale current (see table |
|
| Output On/Off to enable the output. |
|
20. | Divide the voltage drop across the current monitor by its | Readings within high current |
| resistance to convert the value to amperes. Record this value as | sink measurement |
| well as the current reading on the front panel display. Enter the | (see table |
| difference between the two readings in the table. |
|
56