7300w² Monitor

Monitor for the WaterWatch² Range

The 7300w² Monitor is the core to the WaterWatch² product range,the monitor is designed to interface with all the sensors in the WaterWatch² range. The starting specification provides all the connections required for 1 or 2 sensors and systems can be created by the use of expansion boxes to include multiple sensors. The maximum number of sensors will be limited by the practicalities of most sites. We anticipate 8 being a sensible maximum although many more can be accommodated.

Combining sensors provides a very cost effective way of simultaneously monitoring parameters such as Dissolved Oxygen and Suspended Solids in an Activated Sludge Plant, or pH and Turbidity at a treatment works outfall where the sensors can be located close together.

Installations can be expanded in the future if extra measurement points or parameters are required, the monitor will not need to be replaced simply add the extra hardware and re-configure the settings.

The advanced serial communication between the monitor and sensors mean the calibration and configuration data can be preserved if either part is replaced and can be copied from sensor to sensor further reducing the time required for configuration and for maintenance. The user interface on the monitor is highly intuitive, making setup and operation straightforward to carry out. This saves time and avoids the need for specialist training, most commands are self explanatory and intuitive.

The 7300w² Monitor has been designed to make our customers lives easy. The graphical display has been chosen to provide the best possible contrast, even in bright sunlight. In normal operating mode the display gives a large digit display of the measured parameter(s), the user can also select a trend display giving an indication of site performance over the last week.

The setup and maintenance menus can be accessed by pressing the menu key and following the on-screen instructions. The membrane keypad has large 20 mm keys that have a positive action allowing use of the monitor whilst wearing gloves. The use of a touch sensitive display was considered, however this idea was rejected as feedback from our customers indicated that such displays are unreliable in outdoor, arduous applications.

We offer a range of standard installation options, ranging from a simple handrail bracket, to a package including an outer enclosure, isolator and handrail mounting struts. In addition we offer a bespoke design service to ensure that our monitoring system meets the exact requirements of your site. As with all our products we can supply these options as just the hardware or provide installation and commissioning services that fully guarantee a trouble free installation.

The high degree of flexibility of the WaterWatch² range allows the 7300w² Monitor to interface with multiple sensors and to provide many outpt signals. This degree of flexibility means that a large number of terminals need to be accommodated, this requires the use of our WaterWatch² expansion boxes. These boxes can be added to the monitor as part of the initial purchase or as a retrofit allowing the monitoring and control system to grow with your needs. Details of the boxes are provided by following the links below.

Applications

  • Turbidity
  • Dissolved Oxygen
  • Suspended Solids

...

  • pH
  • Oil on Water
  • Conductivity

...

  • Redox
  • Sludge Density
  • Colour

Features

  • Multiparameter
  • PROFIBUS
  • Multisensor

Technical Specification

Physical

Dimensions 213 x 185 x 95 mm (HxWxD)
Weight1.4 kg
Protection ClassIP65
Enclosure MaterialABS
Cable Entries1x M20, 4x M16, 1x M12
Cable Core SizeMax Conductor Size 2.5 mm²

Electrical

Power Supply 100-240VAC, +10/-15% Field Selectable, 50/60Hz
10-30 VDC option available
Power Rating30W
If more than two sensors are to be used then an external higher rated power supply may be necessary

Environmental Data

Operating Temperature -20 to 60ºC
0-95% Relative Humidity, Non-Condensing
Location Indoor or Outdoor

User Interface

DisplayGraphic LCD, Black on White, Transreflective
Viewing Area78 x 59 m
BacklightOn/Off/On after keypress with user adjustable contrast
Membrane Keypad6 Key pillow embossed, 20 mm diameter

Output Signals

Analogue Output2, 0/4-20mA, max load 750 ohm
Relays3, reduced to 1 relay when Profibus is selected
Relay TypeSPCO
Relay Rating2A @ 24VDC
Digital CommunicationsPROFIBUS DP, alternative protocols available on request
Auxilliary ConnectionsConfigurable for Remote Input or Device Power

Sensor Interface

Digital CommunicationModTechw², RS485
Information to Download
Measurement Links