California Instruments 2001RP, User And Programming Manual

Page: 42 / 130

User and Programming Manual - Rev N
4.2.5 Control the Output
The Output can be disabled or enabled using the ON/OFF button as follows:
1. Pressing the OUTPUT button when the output LED is on will open the AC source output
relay. The programmed voltage setting will remain at the last program value.
2. Pressing the OUTPUT button again will close the output relay and the output will revert
to the last programmed value.
4.2.6 Measure Peak Inrush Current (Requires -OP1 Option)
The peak current measurement function of the 2001RP uses a sample and hold circuit to
track the highest peak current found until reset. The peak current sample and hold circuit is
reset any time the user toggles away from the peak current display mode to a different
measurement.
The peak inrush current for a unit under test can be measured using this function as follows:
1. Program the output to zero volts and open the output relay using the ON/OFF button.
2. Use the SELECT button to display the present peak current value.
3. Use the SELECT button again to toggle to any other measurement readout. This will
effectively reset the peak current sample and hold circuit to zero amps.
4. Use the left shuttle knob to set the voltage to the nominal supply voltage of the unit
under test.
5. Use the ON/OFF button to apply the programmed voltage to the unit under test.
6. Use the SELECT button to display the measured peak current value.
Note: The 2001RP output is turned on at random phase angle. It may be
necessary to repeat this test to find the highest possible peak inrush
current demanded by the unit under test.
Phase angle control is available over the bus if the –OP1 option
package with IEEE-488/RS232C interface is installed.
2001RP April 2007 33