AC/DC voltage measurement with a range of 0-1000V
AC/DC voltage measurement with a range of 0-1000V
AC/DC current measurement with a range of 0-10A
Measurement of resistance with a range of 0-20M
Continuity testing with audible buzzer
Diode testing with voltage measurement
Capacitance measurement with a range of 0-2000F
Frequency measurement with a range of 0-100kHz
Key Features
Technical Specifications
0.5% (DC Voltage), 1.0% (AC Voltage), 1.5% (Current)
0.1mV (Voltage), 0.01mA (Current), 0.1 (Resistance)
3 times per second
0C to 40C (32F to 104F)
-20C to 60C (-4F to 140F)
1.5V x 2 (UM-2, AA)
approximately 230g (8.1 oz)
185 x 90 x 45 mm (7.3 x 3.5 x 1.8 in)
Applications
| The MetroQ MTQ-888 Digital Multimeter is suitable for a wide range of applications, including |
Electronics repair and maintenance
Electrical engineering and design
Industrial automation and process control
Education and training
Hobbyist projects and DIY electronics
Overall, the MetroQ MTQ-888 is a versatile and accurate digital multimeter that is an essential tool for anyone working with electricity and electronics.
MetroQ MTQ-888 Digital Multimeter DocumentationOverviewThe MetroQ MTQ-888 Digital Multimeter is a highly accurate and versatile measurement tool designed for use in various Internet of Things (IoT) applications. This multimeter measures voltage, current, resistance, continuity, and frequency, making it an ideal component for a wide range of projects.Technical SpecificationsMeasurement ranges:
+ Voltage: 0-1000V AC/DC
+ Current: 0-10A AC/DC
+ Resistance: 0-20M
+ Continuity: Audible beep for resistance < 50
+ Frequency: 0-100kHz
Accuracy: 0.5% for voltage and current, 1% for resistance
Resolution: 0.001V, 0.001A, 0.01Connectivity and CommunicationThe MetroQ MTQ-888 Digital Multimeter communicates via a serial interface (UART) at a baud rate of 9600. It can be connected to a microcontroller or a single-board computer using a serial communication protocol.Code Examples### Example 1: Measuring Voltage using ArduinoIn this example, we will use an Arduino Uno board to read voltage measurements from the MetroQ MTQ-888 Digital Multimeter.```
#include <SoftwareSerial.h>#define multimeter_rx 2 // Connect multimeter TX to Arduino RX
#define multimeter_tx 3 // Connect multimeter RX to Arduino TXSoftwareSerial multimeter(multimeter_rx, multimeter_tx);void setup() {
Serial.begin(9600);
multimeter.begin(9600);
}void loop() {
// Send command to read voltage
multimeter.print("VOLT?
");
// Read response from multimeter
String response = multimeter.readStringUntil('
');
// Extract voltage value from response
float voltage = response.toFloat();
Serial.print("Voltage: ");
Serial.println(voltage, 2);
delay(1000);
}
```### Example 2: Measuring Frequency using Raspberry Pi (Python)In this example, we will use a Raspberry Pi single-board computer to read frequency measurements from the MetroQ MTQ-888 Digital Multimeter using Python.```
import serial
import time# Open serial connection to multimeter
multimeter = serial.Serial('/dev/ttyUSB0', 9600, timeout=1)while True:
# Send command to read frequency
multimeter.write(b"FREQ?
")
# Read response from multimeter
response = multimeter.readline().decode().strip()
# Extract frequency value from response
frequency = float(response.split(':')[1].strip())
print("Frequency:", frequency)
time.sleep(1)
```### Example 3: Measuring Resistance using ESP32 (MicroPython)In this example, we will use an ESP32 board to read resistance measurements from the MetroQ MTQ-888 Digital Multimeter using MicroPython.```
import uart# Initialize UART connection to multimeter
uart.init(9600, timeout=1000)while True:
# Send command to read resistance
uart.write("OHMS?
")
# Read response from multimeter
response = uart.read(20)
# Extract resistance value from response
resistance = float(response.decode().split(':')[1].strip())
print("Resistance:", resistance)
time.sleep(1)
```Note: In each example, the multimeter must be set to the corresponding measurement mode (e.g., voltage, frequency, resistance) using the built-in buttons and display. Consult the MetroQ MTQ-888 Digital Multimeter user manual for instructions on setting the measurement mode.