DLS Reference 100 Instrukcja Obsługi Pobierz pdf (Strona 12)

8 World Precision Instruments

Quick Functional Check

To demonstrate the DLS100 and DS8000 are working as desired, complete the

following exercise.

CAUTION: DS8000 MUST be powered off before attaching the DLS100.

1. Connect the DLS100 to any channel on the DS8000.

2. Connect the 10KW “Dummy Load,” included in the Accessory Kit, to the DLS100

output.

3. Connect an oscilloscope to the dummy load resistor.

NOTE: The ground lead of the oscilloscope probe MUST connect to the “–”

output of the DLS100.

4. Turn power on to the DS8000. The Power LED and the 1µA range indicator on

the DLS100 illuminate.

5. Press the 1mA range key. The 1mA indicator illuminates.

6. Refer to the DS8000 manual to set up the selected channel of the DS8000 for a

continuous uni-polar pulse, 1ms width, 5ms period, and 1V amplitude.

7. Set the DS8000 output to on. The Activity LED on the DLS100 illuminates,

indicating that a signal is being received. The oscilloscope should not show any

signal on the load yet, because the Output switch on the top panel is not yet on.

8. Press the On/Off (yellow) switch once. The switch button illuminates and a 1V

positive pulse should be observed on the oscilloscope.

TECHNICAL NOTE: The amplitude is 1V because the DS8000 is sending a 1V

signal to the DLS100, and the 1mA full scale range is selected. Since a 10V

signal is required to produce a full scale output, a 1V signal produces 10% of

full scale, or 100µA output. From Ohm’s Law, (E = I×R), 100µA through a 10KW load

produces 1V.

9. Set the amplitude of the pulse from the DS8000 to 10V. The pulse observed on

the oscilloscope should be 10V, also.

10. Press the 100µA range switch on the DLS100. The pulse amplitude on the

oscilloscope should drop to 1V.

11. Set the pulse amplitude on the DS8000 to –10V. The output of the DLS100

should now be –1V.

You may try other signal waveforms, such as a sine wave. Or, you can program

different waveforms on other DS8000 channels and move the interface cable to

these other channels, one at a time, to see the DLS100 output change according to

which channel it is connected.

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DLS Reference 100 Instrukcja Obsługi Strona 12