microFLEX M2T Controller
Single Cooling Tower/Closed Loop Controller
The ProMinent® microFLEX is a cooling tower/closed loop controller that combines the latest technology with an economical solution. Our breakthough design offers a worry-free thermal flow switch that does not require any user adjustments or calibration.
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Standard Features
- Tower conductivity and temperature input
- Flow switch status input
- 5 Key universal keypad
- 2 Line, 16 character backlit display
- Single water meter input
Benefits
- Selectable Inhibitor Feed: Provides 4 feed modes; bleed and feed, bleed then feed, proportional to makeup water volume and percentage time.
- Water Meter Input: Allows for chemical to be fed based on water volume versus timed pump control methods generally found on comparably priced controllers.
- Single Point Calibration: For ease of start up and operation. Warning message immediately detects fouled or faulty sensors.
- What and Why Information: On the controller display is a valuable troubleshooting tool. Solenoid and chemical pump relays show complete status. Shows WHY the relay is on/off.
- Controller Run Time: Gives total hours per day and total operating days since initial installation.
- Robust Diagnostics: Provide complete 24-hour history of bleed valve operation, relay run times and minimum/maximum temperatures.
- Keypad Password: Eliminates unauthorized adjustments.
- Communication Options: Include Ethernet networking, dry contact alarm relay or 4-20mA output on conductivity.
- Optional Web Browser User Interface with Networking Capabilities: Provides ability to direct connect to the controller from a portable workstation, such as a laptop computer. Can also view critical processes remotely through the use of a LAN.
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| Rating - Detail | Notes | |
|---|---|---|
| Analog-Digital I/O | ||
| Conductivity Sensor | Auto ranging from 100uS to 10,000uS compensated | Single point calibration, temperature |
| Temperature Sensor | 32oF to 125oF (0oC to 50oC) | Displayed as F or C |
| Thermal Flow Switch | 1GPM trip within 30 seconds NO FLOW | Typically 10 second trip with in FLOW/ |
| Water Meter Input current | 400Hz, 0.5mA @ 5VDC measurement head | Accepts paddlewheel or contacting |
| Relay Outputs | 1 SPST (Inhibitor), 1 SPDT (Bleed) | Single controller fuse |
| 4-20mA Output (optional) | Single DC isolated, loop powered loop | User definable span, alarms on open |
| Alarm Relay (optional) un-fused | 500mA @ 24VDC Dry contact set, alarm | Normally closed contact, open on |
| Communications User Interface | ||
| Keypad-LCD | 5 Key tactile feedback, universal characters, 2 line x 16 character, backlit | Scan rate 100 mS nominal, User adjustale contrast |
| 10 Base T, TCP/IP Ethernet LAN(optional) | HTML micro web server with user definable IP address | User definable static IP Remote Monitoring & Programming |
| Controls | ||
| Relay ON/OFF | ON/OFF control valve | Relay 1 chemical feed, Relay 2 bleed |
| Volumetric feed | User set, measure volume & pump on time | Sequential control, measures make-up volume then bleeds for user set volume |
| Interlocking | Flow switch contact set input | Relays OFF when contact set opens |
| Blocking | Inhibitor feed may be set to block on bleed | |
| Alarms - Feed Limit Timers | Minutes per day | Auto-reset @ Midnight |
| System | ||
| Units of Measurement | US/Metric selectable | Option to use US or Metric units of measurement |
| Electrical | 120VAC, 50/60Hz | |
| Internal Fusing | 5 AMPS @ 120VAC | |
| Surge Suppression | Relay 2 N.O. (bleed) contacts snubbed @ 0.1uF, 150ohm | Varistor on AC line input |
| Accessory Power | 15-22VDC, unregulated, thermally fused @ 50mA | |
| Enclosure | Non-metallic, NEMA 4X | 5.9”W x 5.9”H x 3.5”D (150mm W x 150mm H x 90mm D) |
| Certifications | ||
| CSA: Pending | CSA tested to comply with UL (Pending) |