The following steps show how to set up an Agilent 3458A System Voltmeter from its front panel to take a statistical average
of 100 readings. represents the unlabeled shift key in the FUNCTION/RANGE group.
1.Program 10 power line cycles per sample by pressing .
2.Program 100 samples per trigger by pressing .
3.Set up the voltmeter to take measurements in the statistical mode as follows:
4.a. Press .
b. Press until the MATH function is selected; then press .
c. Press until the STAT function is selected; then press .
5.Now set up the voltmeter to read the average value of the measurements as follows:
6.a. Press .
b. Press | until the RMATH function is selected; then press | . |
c. Press | until the MEAN function is selected; then press | . |
7. Execute the average reading program by pressing | . | |
|
|
8.Wait for 100 readings and then read the average measurement by pressing . Record this as your result. To repeat the measurement, perform steps (7) and (8).
CC Load Effect
This test measures the change in output current for a change in the load from
1.Turn off the module and connect the output to be tested as shown in Figure
2.Turn on the module and program the current to the
3.Adjust the load in the CV mode for
4.Record the output current reading (DVM reading ÷ current monitor resistance value in ohms).
Note | You may want to use the average reading program described previously. |
5.Short the load switch and record the output current reading.
6.The difference in the current readings in steps (4) and (5) is the load effect and should not exceed the limit specified in the Performance Test Record Tables under CC LOAD EFFECT, for the particular model being tested.
CC Source Effect
This test measures the change in output current that results when the ac line voltage changes from the minimum to the maximum value within the specifications.
1.Turn off the module and connect the ac power line through a
2.Connect the output terminals as shown in Figure
3.Turn on the module and program the current to the
4.Adjust the load in the CV mode for
5.Adjust the transformer to the LOW line voltage (e.g., 87Vac for a 115Vac nominal input, or 174Vac for a 230Vac nominal input).
6.Record the output current reading (DVM reading ÷ current monitoring resistor in ohms).