Features of Walchem Controllers
Walchem controllers are used for a broad range of water treatment applications. Equipped with powerful programming features, these controllers have set performance standards. The following features of these controllers make them popular with our industrial clients.
- The controllers are equipped with a large touchscreen display, and their icon-based programming makes setup easy.
- There is a universal sensor, which adds to the flexibility of this device. The same type of controller can be used with any kind of sensor.
- A combination of analog input board and sensor input adds to the flexibility of these water treatment controllers.
- These controllers feature analytical sensors, designed for ORP, pH, disinfection, conductivity, flow meter input, and fluorescence.
- The device is offered with a multiple language support option, enabling easy setup in various environments.
- Walchem controllers are provided with an economic wall-mount package, which ensures easy installation.
- There is an Ethernet option, which makes these controllers accessible via LAN, Internet, or Modbus/TCP.
- Emailing alarm messages, graphs, data logs, or system summary reports are other features, which make these devices user-friendly.
- Walchem controllers assure complete flexibility with each relay’s function.
When used for general conductivity, ORP, pH, and disinfection applications, they assure flexibility with the following features
- On/off Setpoint
- Proportional control ( this is offered with pulse solid-state opto relays or 4-20 mA output)
- In-range or out-of-range activation
- PID control ( this is offered with pulse solid-state opto relays or 4-20 mA output )
- Time-based activation
- Probe wash
- Activation based on the state of closure
- Timed activation triggered by accumulated the total flow of paddlewheel flow meter or water contactor
- Activation with another output
- Activation as the on-time of another output
- Spike set point
- Alarm
When used for boiler or cooling tower applications, they assure flexibility with the following features
- Biocide timer with pre-bleed and post-feed bleed lockout options
- Bleed time proportional to makeup water volume
- Bleed on conductivity
- Boiler blowdown on conductivity using intermittent sampling
- Feed time proportional to makeup water volume
- Feed in proportion to bleed time
- Feed as a percent of elapsed time