Model 2380-500-30 Programmable Instruments
Section 3: Performance Verification
2380-500-30-905-01 Rev. A / November 2015
12
Current: 1 A
Voltage: greater than electronic load’s voltage
4. Vary the voltage of the electronic load from the minimum to maximum of its range. Turn on the
output for DC source first and then turn on the input of the electronic load.
5. Record the reading values when the DVM measurement data is stable.
Record the electronic load’s measured voltage value on VFD (display value).
Record the DVM reading value.
Record the electronic load’s setting voltage.
6. Vary the voltage of the electronic load by sampling the low, median, and high points of its range,
then repeat step 6.
7. Turn off the DC source and the electronic load. Then switch the electronic load to high voltage
range (CVH).
8. Set the DC source and electronic load according to steps 3 and 4, then repeat steps from 5 through
8.
9. Power off all the equipment after the test.
10. Calculate the deviation and determine whether it is within the specification.
Voltage setting accuracy: the measured value by DVM versus voltage setting value.
Voltage read-back accuracy: the measured value by DVM versus the displayed value on
VFD.
Check DC current and DC current readback accuracy
You can use the text below to verify whether the electronic load’s setting accuracy and readback
accuracy in CC mode are within the specification.
Equipment required
DC source
The DC source output current must be greater than electronic load’s rated current.
Digital voltage meter
Keithley Model 2000
High precision shunt
The selected shunt must be able to withstand the maximum current of electronic
load.
Cable for high current
(thick-cable)
22 AWG hookup wires
Cable for low current
(thin-cable)
18 AWG hookup wires
1. Set up the equipment, as shown in the following figure.
Ensure the warm-up requirement has been met, as described in the
Performance Verification
Procedures
.
