Peng Huading, who was already disappointed, couldn't help but feel a little suspicious and said to himself: "He seems to have a ghost in his heart."

Thinking of this, he looked at all the several meters carefully again, and at the same time carefully looked at the values ​​of each ammeter. As he looked at it, he finally found a clue:

The current value displayed by the AC ammeter installed on the rectifier is quite different from the current value displayed by the AC ammeter on the AC distribution cabinet! The current value displayed by the ammeter on the AC distribution cabinet is just over fifteen amperes, while the current value displayed by the ammeter on the rectifier is close to sixteen amperes! There is an additional zero point of five amperes, and if you don’t look carefully, you can’t see it at all.

Under normal circumstances, or under the premise that the meter is accurate, the current value on the front AC distribution cabinet should be greater than the current value on the rectifier. Even if there is no other load, the current behind should be equal to the front and will definitely not exceed the front, because both the rectifier and the transformer can only consume energy and cannot increase energy.

This is something that people who don’t have any technical knowledge know!

Peng Huading's mental movements were a little exaggerated, looking between the two ammeters, while quietly paying attention to Wu Shibo's movements.

Sure enough, he found that Wu Shibo glared at one of the manufacturers' staff.

The staff member showed a hint of grievance on his face, but then walked over and said, "Young man, what did you find? These rectifiers and distribution screens are from our company..., have you found that the values ​​of the two ammeters are not in line with each other?"

Peng Huading nodded and said, "Yes, the difference is 0.5 amps, and the current number of the distribution screen behind is actually larger?"

The staff member smiled and said, "Haha, aren't you picking our faults? This is not that our table is inaccurate, but that it has not been cleared for a long time. Ask all the maintenance personnel, who is still looking at the numbers displayed on these tables now? You're too fussy."

He said it was right, but basically no one saw these electricity.

Maintenance personnel are not as responsible as before. They only need to know whether there is or not. No one cares about the value higher or lower, and naturally no one goes to meter calibration. The data displayed on the meter generally has large errors. Not to mention that the difference is only zero point five amperes, but there are also two amperes and three amperes.

Peng Huading sneered in his heart: It is normal for these ineffective meters to display data incorrectly, but why do you care so much about normal situations? An expert who was arrogant just now began to feel guilty, while a gloating person hurriedly explained.

Peng Huading, who had made up his mind, suddenly reached out and pressed the red button marked "off" on the distribution screen.

"Pick!" a crisp sound.

"Ah——" Wu Shibo was shocked and shouted, "What are you doing?"

Peng Huading pressed the button of the distribution screen, and the air switch installed in the screen tripped, making a crisp sound. Then the alarm light in the rectifier lighted up, and the alarm horn shouted "Woooooooooooooooooooo--".

Not only Wu Shibo and others were shocked, but also staff from other manufacturers were shocked.

Peng Huading's eyes quickly swept through the two ammeters on the distribution screen and the rectifier, and then apologized while pressing the green button marked "On" on the distribution screen: "I'm sorry, I'm sorry, I touched the wrong place."

The air switch in the distribution screen made a crisp sound again, and then the red alarm light on the rectifier disappeared, and the alarm horn also stopped whistling and returned to normal together.

From pressing the "off" to pressing the "on", Peng Huading spent less than three seconds. People who didn't know it really might think that Peng Huading had touched the wrong place. But Peng Huading knew what he was doing, and he also believed that Wu Shibo and the staff of the manufacturer who spoke just now knew what he was doing.

After Peng Huading pressed the red button of "off", the AC power supply was cut off, and the AC ammeter pointer on both the distribution screen and the rectifier should be reset to zero. Even if there are errors between these two meters, their pointers should be deflected significantly to the left, and the pointer will move closer to zero and approach zero.

If what the manufacturer staff said just now is correct, then the ammeter pointer on the distribution screen is closer to zero due to the small error, and the ammeter pointer on the rectifier is farther away from zero due to the large error, but the deflection amplitude should be the same.

However, Peng Huading found that the pointers of the two ammeters were deflected to the left for a very small distance after pressing the red button.

After pressing the green button - after the AC power is turned on, the two pointers are restored - only deflecting to the right for a very small distance.

Seeing that the pointer was just slightly deflecting, Peng Huading felt relieved and was overjoyed: This situation was the same as he expected! Because of the backward economy, there were not many people installing telephones, the load of telecommunications equipment was very small, and the battery capacity was too large, which seriously did not match the load they carried.

It is precisely because of the long-term mismatch between the two, and the power in rural areas is very unstable and power outages are often caused by the battery to be discharged with small currents and charged with small currents, and its performance is quickly deteriorated. In the end, the real capacity of these batteries becomes very small. Not to mention that they cannot reach the dozens of hours they should carry according to the rated capacity, it is not enough to carry telecommunications equipment continuously for nine hours, and communication accidents are inevitably caused.

At the same time, he discovered through the actions just now that Wu Shibo and other manufacturers dug a hole for him - it should be said to be for Huakang Company -: they deliberately mobilized the pointers of the DC ammeter and the two AC ammeters, so that the data displayed by the DC ammeter is within the optimal load current range of the battery, while the data displayed by the two AC meters corresponds to the data of the DC ammeter.

The single-phase voltage of the mains power supply is 220 volts, while the nominal voltage required for telecommunications equipment is 48 volts. The power factor is 0.8. When the data displayed by the DC meter is 55 amperes, the digital value of the AC ampere is about 15.6 amperes.

This is just a simple math problem, so Wu Shibo and the manufacturer naturally made the illusion very easy.

As for why the data of the two AC tables are different, and even the value of the distribution screen is even a little bigger. This is not their negligence, nor is it their stupidity. It is just that they did not expect Peng Huading to come here because of suspicion. They did not expect Peng Huading to think of the small load of telecommunications equipment from the depression outside the town, so they thought of the serious mismatch between the battery capacity and the load, and found the real cause of the battery damage, which is the real cause of the communication accident.

Wu Shibo and others thought that Peng Huading, a young man, saw the bad appearance of the battery in the battery room. If he didn't understand battery technology, he would definitely think that the problem lies in the quality of the battery and would not think of the load problem at all. Even if he happened to think of it, he would stop after seeing the data displayed by those meters. It was impossible to check the real load of the telecommunications equipment.

Because it was concluded that the technicians of Huakang Company would not cause trouble here, they did not take the time to calibrate the pointer very accurately.

In fact, Peng Huading did not find the crux of the fault by seeing the data displayed on the two ammeters. He just used a few meters to expose their conspiracy more intuitively and quickly. He put all their conspiracy in the sun with just two small actions.
Chapter completed!