4-20MA 0-10V 0-5V Load Cell Sensor Amplifier Transmitter Voltage Current Converter

Technical Parameters:

Working voltage: 12VDC- 24VDC
Input Sensor Sensitivity: 2.0MV / V
Excitation output: Output excitation voltage 5V (E +).
Output signal: 0-5V, 0-10V, 4-20MA
Operating temperature range: -20 - 80
Operating Humidity: 10% RH-90% RH (non-condensing)
Accuracy: better than 0.2% F.S
Precision is better than 0.05% F.S

Main features:

Ultra- high-precision op amp circuit, high accuracy, good stability
The power supply has reverse polarity protection, surge protection, overcurrent protection
Suitable for weighing, pull pressure, torque, and other strain sensor.
Gear selection:
DIP switch No. 1 is appropriated for OFF, VO output 0-5V, when No. 1 to the ON, VO output 0-10V, when DIP switch No. 1 and No. 2 are appropriated for OFF, VO output 0-5V, IO output 4-20mA.

About debugging:

1. Zero adjustment

1: voltage regulation, first the system is unloaded, the regulated voltage zero potentiometer (Vzero) to adjust the zero point. Measured with a multimeter voltage output terminal VO, let indication as close to zero indication.

2: The current adjustment, first the system is unloaded, the current zero adjustment potentiometer (Izero), with a multimeter block measuring the current output of the current IO, try to let it close to 4mA. .

2. Gain adjustment

1: voltage full-scale adjustment, the system loads a given weight value (recommended range: 80% ~ 100% FS), the output voltage value calculated in accordance with the load weight and maximum load ratio between the digital multimeter to monitor the output voltage of the rotation span potentiometers (Vspan) to adjust the full-scale output.

2: Current full-scale adjustment system will load a certain weight value (recommended range: 80% ~ 100% FS), the output current value calculated in accordance with the load weight and maximum load ratio between the digital multimeter to monitor the output, rotating current full potentiometers (ispan) to adjust the full-scale output, try to let it close to 20mA.

3. The re-examination

The system is unloaded, the measured zero output; load a certain weight values, measured output voltage is expected magnification. If you do not match, adjust again.

Signal Processing:
A good transmitter, the first to do filtering, this module + inductance capacitor filter can effectively suppress power supply ripple interference with the flow and anti-reverse protection.