Red-Blue Panel Voltmeter and Amperemeter 0-100 V, 100 A with Shunt

Overview

The product is useful in your applications that require mounting to monitor the power supply voltage and power consumption of a device. Its display is very easy to read and in a low light.

This voltmeter and ammeter can be very easy to use when you build your own power supply, and can measure currents up to 100 A with shunt.

If the measured voltages do not exceed those of the power supply, you can use the measured voltage to power the device.

Specifications

• Measured voltage: 0 - 100 V
• Measured current: 0 - 100 A
• Supply voltage: 4 V - 30 V
• Voltage measurement error:  ± 0.1%
• Current measurement error:  ± 1%
• Shunt resistance: 75 m Ohm
• Current consumed: maximum 20 mA
• Refresh rate: 300 ms
• Display on double display of 0.28"
• Cable length: 15 cm
• Dimensions: 29 x 22 x 48 mm
• Mounting hole dimensions: 46 x 27 mm

Features

● High precision, high reliability, suitable for high-end applications

● With reverse connection protection, no burning if connected reversely.

(Note: The test current must be connected to the shunt before connecting to the power supply regardless of the current size)

More Details

Note: A meter with a range of 50A or 100A must be connected to a shunt to measure current regardless of whether the measured current is less than 10A ! Otherwise it will burn the meter head.

Voltage display is normal, current display 0.00 or 0.0

Make sure that the thick black wire is connected to the negative terminal of the battery and the thick red wire is connected to the negative terminal of the load. (Note that the wiring of discharging and charging is different, see the concept of load and power supply at the end). (Meter using imported chips, through a very rigorous testing and calibration at the factory to ensure 100% no quality issues before shipment. Meet current display 0 cases of 99.99% is wired wrong, please be patient carefully check the wiring)

Inaccurate current display

If it is directly powered or the independent power supply and the equipment power supply share the same ground, just disconnect the thin black wire for accuracy.

No display when connected to power

All rectified AC power must be filtered by an electrolytic capacitor above 1000uF before it can supply power to the meter.

Judge whether the header is good or not (the following are two cases of normal header)

Without the shunt, connect the thin red wire and thin black wire to the power supply. The current of the meter with a range of 50A shows 50.0~59.9 , and the meter with a range of 100A shows 100~109;

Connect the shunt, connect the thin red wire and thin black wire to the power supply, the current of the meter with a range of 50A displays 0.00 , and the meter with a range of 100A displays 0.0;

Other matters needing attention

The measured current can only be connected to the negative pole of the power supply and the negative pole of the load.

Voltage range: The power supply voltage range of the 5 -wire meter head is 4~28V , that is, the voltage connected to the thin red wire cannot exceed 28V.

About the concept of load and power supply

When discharging: batteries, switching power supplies, and transformers are power sources, and resistors, lamps, motors, and electrical equipment are loads.

When charging: chargers, generators, and solar energy are power sources, and rechargeable batteries and storage batteries are loads.

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