Agilent Technologies E3610A Manual Del Usuario página 58

TYPE
Oscilloscope
RMS Voltmeter
Multimeter
Electronic Load
Load Resistor(For high current range)
Current Sampling Resistor
Constant Voltage(CV) Test
The measuring device must be connected as close to the output termi-
nals as possible when measuring the output impedance, transient
response, regulation, or ripple of the power supply in order to achieve
valid measurements. A measurement made across the load includes the
impedance of the leads to the load and such leed lengths can have an
impedance several orders of magnitude greater than the supply output
impedance, thus invalidating the measurement.
When performance measurements are made at the front terminals,
the load should be plugged into the front of the terminals at (B), while
the monitoring device is connected to a small lead or bus wire
inserted through the hole in the neck of the binding post at (A).
Load Effect(Load Regulation)
Definition: CV Load Effect is the immediate change in dc output volt-
age when load resistance changes from open circuit to full load or
from full load to open circuit.
Test Parameters:
Measured Variable: Output Voltage
Expected Results: Less than 0.01% plus 2 mV
Test Procedure:
a. Connect the test equipment as shown in Figure A-2. Operate
the electronic load in constant current mode and set its current
to the full rated value of the power supply (E3610A: 3.0 A,
E3611A: 1.5 A, E3612A: 0.5 A). Input off the electronic load.
b. Turn the unit's power on and turn CURRENT control fully clock-
wise.
Table A-1. Test Equipment Required
REQUIRED CHARACTERISTICS
Sensitivity: 1 mV
Bandwidth: 20 MHz/100 MHz
True rms, 10 MHz bandwidth
Resolution: 0.1 mV
Accuracy: 0.01%
Voltage Range : 240 Vdc
Current Renge : 10 Adc
Open and short switches
Transient on/off
2.6 ohm 50 W, 13.3 ohm 50 W, 120 ohm
50 W
0.1 ohm 0.1% 10 W, 1 ohm 1% 10 W
* P = Performance testing
A-2
USE
P
P
P, A
P, A
P
P, A
A = Calibration adjustments.
c. Turn up output voltage to the full rated value (E3610A: 8.0 V,
E3611A: 20 V, E3612A: 60 V) as read on the digital voltmeter.
Then input on the electronic load.
d. Record the output voltage at the digital voltmeter.
e. Operate the electronic load in Open(Input Off) mode.
f. Record the output voltage again immediately. The readings' dif-
ference during the immediate change should not more than
0.01% of output voltage plus 2 mV.
Figure A-2. Basic Test Setup
Source Effect(Line Regulation)
Definition: Source effect is the immediate change in dc output volt-
age when the ac input voltage changes from a minimum to maximum
value (± 10%of nominal voltage).
Test Parameter:
Measured Variable: Output Voltage
Expected Results: Less than 0.01% plus 2 mV
Test Procedure:
a. Connect the test equipment as shown in Figure A-2. Operate
the electronic load in constant current mode and set its current
RECOMMENDED MODEL
Agilent 54602A
Agilent 34401A
Agilent 6063B