CM44X COD/Nitrate Transmitter Basic Setup Overview
The CM44X series transmitter is an important device in industrial online analysis, commonly used for the measurement of COD (chemical oxygen demand) and nitrate. Correct wiring and power supply are the foundation for ensuring stable operation of the transmitter. Based on official materials, this article introduces the basic setup steps for the CM444 and CM448 models.
Wiring Method
Wiring is the first step in transmitter installation and must be performed strictly according to the drawings to ensure correct signal and power connections.
Wiring Diagram
Please refer to the following wiring schematic for connection:
When wiring, please distinguish between power lines, signal lines, and ground lines to avoid short circuits or interference.
Power Supply Configuration
The CM444 and CM448 transmitters support multiple power supply methods and must be correctly configured according to on-site power conditions.
Power Specifications
| Model | Supply Voltage | Power Type |
|---|---|---|
| CM444 | 24 V DC | DC |
| CM448 | 100-240 V AC | AC |
Please confirm that the power supply voltage matches the transmitter nameplate and ensure the power supply is stable.
Power Wiring Schematic
The following images show the power supply connection methods for the CM444 and CM448:
After completing the power supply connection, please check that all terminals are tightened to avoid poor contact caused by looseness.
Setup Precautions
- Be sure to cut off the power before wiring to ensure operational safety.
- Use appropriate cable specifications and ensure waterproof and dustproof treatment.
- The power supply must match the transmitter requirements to avoid overvoltage or undervoltage.
- After completing wiring, check the circuit again before powering on to prevent reverse connection.
By following the above steps, the basic setup of the CM44X transmitter can be effectively completed, laying the foundation for subsequent accurate measurement of COD and nitrate.