ГУЦН BY42F 4-битный двухсимвольный цифровой ЖК-дисплей постоянного тока DC1A3A5A10A30A50A100A200A300A10V30V50V100V200V500V20[измерение положительного/отрицательного тока] включен.

ГУЦН BY42F 4-битный двухсимвольный цифровой ЖК-дисплей постоянного тока DC1A3A5A10A30A50A100A200A300A10V30V50V100V200V500V20[измерение положительного/отрицательного тока] включен.

Description

Note: If "only meter" is purchased, external shunt must be connected when using, otherwise the instrument will be damaged We use FL-2 standard
shunt. You can prepare your own shunt (the same current, 75MV) or buy one from our shop:

Brand: GWUNW/ Guichen 3A Single color (built-in shunt) 10A dual color (built-in shunt) 20A single color (only watch) 20A dual color (only watch) 30A single color (only watch) 30A dual color (only watch) 50A dual color (only watch) 100A single color (only watch) 100A dual color (only watch) 200A single color (only watch) 200A two-color (only meter head) 20A shunt 30A shunt 50A shunt 100A shunt 200A shunt 50A monochrome (only meter head) 10A monochrome (built-in shunt) 3A two-color (built-in shunt) Article number: BYVI428 Decoration and construction content: hydropower project

Welcome, xiao Er has been waiting here for a long time, ready to serve you. If there is no timely reply, must be busy, you can leave a message directly, after seeing the first time to contact you!

Novice Buying Guide:

1. Buy the meter head, a very important parameter is the range. Some buyers want to buy a large range, so the range of measurement is very large, do not often change the head. But sometimes it doesn't pay. What's lost is accuracy! Just like buying a scale, if you buy a scale of 100 pounds, but often only weigh a few pounds of things, obviously not with 10 pounds of high precision. So the selection range to choose the right, rather than the bigger the better. Generally, the selection range should be 2 times of the actual average measured value. For example, if the average current is 5A, a 10A meter is more appropriate.

2 use error: the header in the positive, that is, the positive out of the advanced header, and then to the load. This usage is responsible for the majority of broken headers. At present, any electronic double display head, must not string positive pole measurement! At present, there is a magnetic induction test current meter head on the market, because it is non-contact, so it can be positive. But this kind of meter head precision is very low, and the display is unstable, can only roughly look at the current. Not suitable for strict situations.

3. Accuracy impact: To ensure high accuracy, power supply is very important. The supply voltage should be selected between 5 and 12V, the accuracy and life are better. For 3A and 10A heads, because of the built-in shunt. It can be used to share a main power supply with the tested end.

Important: external shunt was used in the heads of this case, above 10A. Isolated power supply must be used!Otherwise the current error will be very large. At zero, for example, you get a big negative. The reason is: the working current of the meter head and the signal line of the shunt coincide, so the error is produced. When using isolated power supply, the current of the meter head only forms a loop on the other power supply, so there is no such error! An easy way to add an isolated power supply is to use an isolated module! The store has a variety of specifications of isolation module, can be purchased in the store classification!

Current sampling using high precision 18-bit AD chip, data is very accurate and reliable!

The meter head voltage and current have independent fine tuning, increase the cost, but convenient users can correct the error!

Working power supply: 3.8-30V DC power supply with reverse connection protection (but the reverse connection can not exceed 30V)

Power consumption: <=20MA

Refresh speed: about 3 times /S

Measuring voltage and current range: There are multiple measuring ranges, which can be selected at the time of purchase

Please note that various range display methods and decimal point positions are different:

1. The voltmeter displays as follows:

 10V 0.000-9.999V

 30V 00.00-30.00V

 50V 00.00-50.00V

 100V 00.00-99.99V

 200V 00.00-99.99-200.0V

 500V 000.0-500.0V

2.The ammeter displays as follows:

1A 000.0-999.9mA

2A 0.000-2.000A

5A 0.000-5.000A

10A 0.000-9.999A

20A 00.00-20.00A

30A 00.00-30.00A

50A 00.00-50.00A

100A 00.00-99.99A

200A 00.00-99.99-200.0A

300A 000.0-300.0A

500A 000.0-500.0A

Current range: optional

Internal current resistance: 3A 25mM ohms 10A 4.8mm ohms other 75MV full range standard shunt

Test accuracy: ± 0.2% +2 words

Display color: Single color: voltage red + current red Dual-color: voltage red + current blue

Hole size: 45.5mm*26mm

Dimensions: 48mm*29mm*20mm

The voltmeter control part adopts strong CPU core, CPU pin number can reach more than 20 feet, performance more than the average 16 feet or 18 feet of Taiwan "or" local "one-time burn chip, the chip can be repeated burning program, so every piece of voltmeter can separate debugging, achieve high accuracy, it is out of reach for ordinary disposable single chip microcomputer. The accuracy of the voltmeter is higher than that of ordinary low-price multimeters (for example, the multimeters of some brands in China are still very low in accuracy, so please do not take them as the standard for comparison). The multimeters used in our shop are all American brand multimeters.

Current sampling using independent AD conversion chip, stability and accuracy are more advanced, accurate display, suitable for the need to accurately measure the current.

Measured effect:

High precision equipment calibration effect! Note: the following figure is the effect of 3A variable precision meter head measurement, other range effect is similar, but the current accuracy is fixed!

If the value is smaller than 1A, the decimal point is automatically switched. The unit is mA

3A Built-in shunt meter head connection method:

Special reminder: part of the first time to use ammeter friends, like the current test end string to the positive pole, this is absolutely not! Remember, the current test end of any dual display can only be connected to the negative pole to measure the current!

Good supply voltage is 5V.

For 20A and above 20A, external shunt meter head connection method is adopted:

The working power supply of the meter head must be an independent power supply. Good supply voltage is 5V. If it is not convenient to add batteries or transformers, isolation modules can be used to generate an independent power supply!

The motor represents the equipment under test. Electrical equipme

The price that