Water Treatment Cooler Model 140

This water treatment controller for cooling towers by Lakewood Instruments uses the latest microprocessor technology that features multiple inputs and easy setup. Its program uses Lakewood plain English, with user-friendly menu interface. Water meters, sensors, and plumbing assemblies are purchased separately.

Features:

Removable power cord and receptacles for simple conduit installations.

Scheduled feed which can use two relays for biocides or other chemicals.

Standard features include water meter input, conductivity input, flow switch 

input, and 4-20 mA output.

Single circuit board design for better reliability and lower cost.

Large open shallow enclosure for easy wiring.

The enclosure is rated NEMA 4X.

Power selector switch for 115 or 230 vac operation.

Heavy-duty stainless steel domed numeric keypad and illuminated graphical display for quick and easy programming. Tactile sensing and life expectancy of the keypad are also improved.

LED indicators for power, alarm, and relay status.

No add-on options. 4-20 mA output and biocide features are standard.

Multiple methods of chemical feed for application flexibility.

Specifications:

    * Conductivity range: 0 10,000 μS
    * Conductivity sensor: 2 electrodes
    * Conductivity resolution: ± 10 μS
    * Temperature comp: 500 ohm NTC
    * Accuracy and repeatability: ± 1.0%
    * Deadband/Setpoint: adjustable
    * Auto/Manual outputs: selectable menu
    * Display: 16 x 2 characters
    * Water meter input: contact head, paddle wheel, or turbine
    * Timer: maximum blower time exceeded, relay time exceeded
    * Output relays: 2 selectable uses, 1 blowdown
    * Relay ratings: 3A each, 10A total
    * Power: 120/240 VAC, 50/60 Hz
    * Ambient temperature: 0° - 49°C (32° - 120°F)
    * Water temperature: 0° - 49°C (32° - 140°F)
    * Pressure: 140 psi (37°C)

Reference: http://www.lakewoodinstruments.ca/cooling_towers/140.htm