Description
Ammeter Unit is a current meter that can monitor the current in real time. The 16-bit ADC (analog-to-digital) converter ADS1115 is used internally to communicate through I2C (0X48). In order to ensure the measurement accuracy, there is a built-in DC-DC isolated power supply, and the I2C interface is also electrically isolated through the low-power isolator CA-IS3020S. This prevents noise and surges on the data bus or other circuits from entering the local ground terminal to interfere or damage sensitive circuits. Each Unit is individually calibrated when leaving the factory, with inital Accurancy 0.1%FS, ÷1 count, resolution 0.3mA. The unit has a maximum measurement current of ÷4A, and an internal integrated 4A fuse to prevent excessive measurement current from burning out the circuit.
Features
÷4A range
16-bit ADC conversion
Inital Accurancy 0.1%FS, ÷1 count
Resolution 0.3mA
LED power indicator
4A Slow-blow Fuse
Factory calibration (Cal data saved in on-board EEPROM)
Built-in I2C isolator CA-IS3020S
Isolated DC-DC
Up to 1000 VRMS isolation withstand voltage
Development platform:Arduin, UIFlow (under development)
2x LEiGO compatible holes
Package Included
1x Ammeter Unit
1x Grove Cable(20cm)
Application
galvanometer
Specification
Resources:Parameter
Withstand voltage:1000V
Measuring range:÷4A
Protocol:I2C
Net Weight:9g
Gross Weight:24g
Product Size:65*24*8mm
Package Size:67*53*12mm
Measurement Range Gain Setting
Different range resolution is different, the error value of the result is different, please set the appropriate range according to the needs.Do not write EEPROM.If you really want to save the custom calibration values to EEPROM，Using the following statement, the factory data will be lost once written
bool Ammeter:saveCalibration2EEPROM(ammeterGain_t gain, int16_t hope, int16_t actual)
//@Parameter:ammeterGarin_t gain //Set Gain
// | PAG | Max Input Voltage(V) |
// | PAG_4096 | 64 |
// | PAG_2048 | 32 |
// | PAG_512 | 16 |
// | PAG_256 | 8 |
//@Parameter:int16_t hope // Set target value
//@Parameter:int16_t actual //ADC raw value
ADC1115_Reference calibration:Calibration current(A):Expected reading(int16)
PGA512(O.512):2:6400
Current measurement range:Maximum input current(A):Power Disspation(W):Minimum resolution(mA):Gain factor
4.096:40.96:83.88608:2.5:0.125
2.048:20.48:20.97152:1.25:0.0625
1.024:10.24:5.24288:0.625:0.03125
0.512:5.12:1.31072:0.3125:0.015625
0.256:2.56:0.32768:0.15626:0.007813
Datasheet
CA-IS3020S
ADS1115
PinMap
M5Core(GROVE A):SDA(GPIO21):SCL(GPIO22):5V:GND
A Meter Unit:SDA:SCL:5V:GND
Example
1. Arduin IDE
Click here to download the Arduin example
Additional information
| Weight | 0.023 kg |
|---|
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