NF BP4620, Instruction Manual

Page: 182 / 214

7.8 Performance Test
BP4620
7-11
7.8 Performance Test

Performance test
Performance testing is performed as part of preventive maintenance in order to prevent
performance degradation of the BP4620. To facilitate execution, this test is performed under
conditions that partially differ from the specifications, as the test items, used measuring
equipment, and load condition are limited for the sake of convenience. If more extensive testing
is required, contact NF Corporation or an NF Corporation sales representative.
Performance testing should be performed as part of acceptance inspection, periodic inspection,
performance verification following repair of the BP4620, etc.
If, as the result of performance testing, the BP4620 is found not to meet its specifications, repair
is necessary. In this case, contact NF Corporation or an NF Corporation sales representative.

Verification prior to performance testing
Prior to performance testing, check the following items.

Is the power supply voltage within the rated range?

Is the ambient temperature within 23

5

C?

Is the ambient relative humidity within the range of 20 to 70%RH?

Is there any condensation?

Has the BP4620 been warmed up for 30 minutes or longer?

Preparations prior to performance testing
Use a cable with a cross section of 2 mm
2
or more and a length of 2 m or less for connecting the
load.
The setting contents of each test item include items that can be changed after performing setting
initialization (by executing RESET in SYSTEM menu). After checking the setting contents,
switch on the output.

Maximum output voltage test using CV mode external signal input
Load: 3

resistance load
Measurement connection: Connect the output of the external oscillator to the external signal input
of the BP4620. Then connect an AC voltmeter and distortion meter to the output terminal of the
BP4620 and measure the voltage and distortion.
Settings: After performing setting initialization, set the operation mode and external oscillator
frequency according to the following table.
Judgment: Gradually increase the output voltage of the external oscillator from 1 Vp-p (the
output voltage of the BP4620 is 100 Vp-p, 35.4 Vrms), and if the output voltage of the BP4620
immediately before the distortion exceeds 1% or overload occurs falls within the rated range
indicated in the following table, the operation is judged to be normal.
Operation Mode Setting External Oscillator Frequency Rated Range
CV-EXT 50 Hz 42.43 Vrms or higher
500 Hz 42.43 Vrms or higher

Maximum output current test using CC mode external signal input
Load: Shorted via current shunt resistor.
Measurement connection: Connect the output of the external oscillator to the external signal input
of the BP4620. Then connect the detection voltage of the current shunt resistor to an AC
voltmeter and distortion meter, and measure the current and distortion.
Settings: After performing setting initialization, set the operation mode and external oscillator
frequency according to the following table.
Judgment: Gradually increase the output voltage of the external oscillator from 1.6 Vp-p (the
output voltage of the BP4620 is 32 Ap-p, 11.3 Arms), and if the output voltage of the BP4620
immediately before the distortion exceeds 1% or overload occurs falls within the rated range