29
g. Send string:
"VSET 200; ISET 17" (6030A)
''VSET 20; ISET 120" (6031A)
''VSET 60; ISET 50" (6032A)
''VSET 500; ISET 5" (6035A)
h. Check that the voltage across Rm is in the range:
169.72 to 170.28mV (6030A)
119.4 to 120.55mV (6031A)
498.1 to 501.8 mV (6032A)
490 to 510 mV (6035A)
Note the reading.
i. Run the program listed in step e.
j. The value displayed by the controller should be the actual output current:
± 76mA (6030A)
± 580mA (6031A)
± 215mA (6032A)
± 75mA (6035A)
Load Effect (Load Regulation). Constant current load effect is the change in dc output current (Io) resulting from a
load-resistance change from short-circuit to full-load, or full-load to short-circuit. Full-load is the resistance which develops
the maximum rated output voltage at current Io. Proceed as follows:
a. Connect the test equipment as shown in Figure 2-5. Operate the load in constant resistance mode (Amps/Volt) and set
resistance to minimum.
b. Turn the unit's power on, and, using DISPLAY SETTINGS pushbutton switch, turn up voltage setting to full output.
c. Turn up output current to:
5.0Adc (6030A)
50Adc (6031A)
16.5Adc (6032A)
2.0Adc (6035A)
d. Increase the load resistance until the output voltage at +S and -S decreases to:
200Vdc (6030A).
20Vdc (6031A).
60Vdc (6032A)
500Vdc (6035A)
Check that the CC LED is lighted and AMPS display still reads ≈ current setting.
e. Short-circuit the load and allow the voltage across Rm to stabilize.
f. Record voltage across Rm.
g. Disconnect short across load.
h. When the reading settles (≈ 10s), record the voltage across Rm again. Check that the two recorded readings differ no
more than:
± 10mA (6030A)
± 20mA (6031A)
± 11mA (6032A)
± 34mA (6035A)
Source Effect (Line Regulation). Constant current source effect is the change in dc output current resulting from a change
in ac input voltage from the minimum to the maximum values listed in the Specifications Table in the Operating Manual.
Proceed as follows:
a. Connect the test equipment as shown in Figure 2-5. Operate the load in constant resistance mode (Amps/Volt) and set
resistance to minimum.
b. Connect the unit to the ac power line through a variable autotransformer set for nominal line voltage.
c. Switch the unit's power on and turn up output voltage setting to full output.
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