CONTROL ELECTRONICS, INC.

1.0 SCOPE

These specifications describe a model PSM-660U Microprocessor Based, Ultrasonic Pump Station Flow Monitor Controller as manufactured by Control Electronics, Inc.

2.0 DESCRIPTION

The PSM-660U Pump Station Monitor shall provide liquid volume throughput measurements and pump control of liquid in a sewage lift-station, wet well or similar application using continuous, non-contacting Ultrasonic echo ranging techniques.

2.1 ELECTRONIC PROCESSING UNIT

a. The PSM-660U Pump Monitor shall be a microprocessor controlled unit with front panel, menu based programming and alpha numeric operator interface. Setup and programming shall be accomplished using four (4) clearly marked, pressure sensitive "button" areas on the front panel of the controller. Unsealed push buttons are unacceptable. All programmed variables and functions shall be PASS WORD protected.

b. The Pumpl Monitor shall contain mathematical conversion equations to relate measured depth in Cylindrical, Rectangular and Square vessels to total gallons.

c. The Pump Monitor shall provide two 4-20 mA analog output signals proportional to level isolated into 1000 ohm load. Outputs shall be programmed for averaging and analog outputs shall have additional damping (user adjustable) for steady chart recordings and control.

d. The Pump Monitor shall not require any volume / flow range selection. Flow Range shall be 0-999,999 GPM and liquid volume Totalizing shall be 8 digit with x1, x10, x100 or x1000 multiplier and 200 daily 8 digit totalizers (data log). The totalizers (counters) shall not reset or lose data in the event of a power failure or system shut down. The totalizer shall be resettable only after entering a security code.

e. The calibration (scaling) of the Pump Monitor shall be programmable in the field by entering the wet well dimensions (diameter for circular; length / width for rectangular; 999.99" max per dimension) and pump ON / OFF elevation points to calculate volume pumped. An additional intermediate elevation point shall be entered for monitoring 'INFLOW' rate. A 'VOLUME OFFSET' value shall be programmable for maximum volume throughput accuracy.

f. The PSM-660U Pump Monitor shall have a resolution of 0.1 gal/min, an accuracy of ±1.0 second of pump run time and ±1.0% of level (0-20 foot range) and ±0.1% calculation error. The DEAD BAND (Min. Range) shall be adjustable from 12" to 36" with 12" typical. Level settings and readings shall be displayed in 0.01" or 0.01 ft. increments.

g. The Pump Monitor shall have a "Test Output" mode for Analog Output Simulation, eliminating the requirement to physically simulate liquid levels for analog output calibration and testing.

h. The Pump Monitor shall have programmable signal filtering for tracking level in harsh environments.

i. Lost-Signal Logic shall be programmable. In the event the Echo return signal is lost, the Pump Monitor will alert the operator, then output a programmed % of level (0-99%) until the echo signal returns or corrections are made. An external float input may also be used to initiate this function.

j. A Low-Level shut-Off level between 0% and 100% may be programmed to ZERO the system and force shut down of pumps.

k. The PSM-660U shall be capable of monitoring and controlling up to 4 pumps with 1 common alarm output that may be set to alarm on one or any combination of LOW level, HI level, HI INFLOW rate, LOW PUMPING rate and EXCESSIVE PUMP RUN TIME. Each pump shall have independent programming of PUMP ON and PUMP OFF elevation points. An AUTO SET function shall allow the operator to quickly have the elevation points set automatically for the pumps by the controller. The Controller shall also have the capability of programming the number of pumps, the pump sequence order and Alternate method of NONE, LEAD/LAG or ROTATION of all pumps.

l. The Pump Controller shall monitor the temperature at the measuring site using a built-in temperature probe in the Sensor head or allow for manual entry of temperature for correct temperature compensated calculations. In the event there is a temperature probe error, the Monitor will alert the operator and automatically use an operator programmed default temperature reading for correct calculations.

m. All programmed Data shall be saved in non-volatile memory to prevent loss upon power failure. The Pumpl Monitor shall restart with no operator assistance upon return of power. A 12 volt DC battery may be connected to the Monitor for continuous operation during a power outage. The Monitor shall have an auxilary 'memory back-up' for saving the users programmed settings. In the event of a system failure or unseen event, the Monitor will automatically reset itself to the users programmed settings.

n. Power requirements shall be 120/220 VAC, ±15%, 50/60 Hz at approximately 15W. Surge protection shall be provided on the 120VAC power line and 4-20mA. output to reduce potential damage caused by unexpected voltage transients.

2.2 DISPLAY PANEL

A two line, 20 character per line, Alphanumeric, back lighted LCD display shall provide indications in INFLOW GPM, PUMPING RATE GPM, TOTAL PUMPED for each cycle, TOTAL PUMPED for day, ACCUMULATIVE TOTAL to date, LEVEL as well as Sensor Temperature and Time Stamped Data Logging history and all programmed variables.

2.3 DATA LOGGING

The Pump Monitor shall have Time Stamped Data Logging of average level in wet well. The logging rate shall be programmed from 0 to 99 minutes. Data shall also be logged for the past 200 days with auto wrap around summarizing each days DATE, TOTAL PUMP CYCLES for day, TOTAL GALLONS PUMPED for day, AVG GPM pumped and TOTAL RUN TIME of pumps. Hour meters with 0.01 hour resolution shall indicate the total run time for each pump / relay, resettable only after entering a pass code. All Data can be viewed at the controller or directly printed through the RS-232 output to a serial printer automatically or on demand. Data may also be downloaded to a PC via RS-232 output (opt USB port) or MODEM, using any standard software package.

2.4 RELAY OUTPUT

Five (5) 5 Amp SPDT relay closures shall be provided as Alarm/Pump control contact outputs. The relay action shall be programmable with the ability to establish independent ON-OFF settings of each relay for differential control.

2.5 ULTRASONIC SENSOR

A US70TC 40Khz PVC explosion proof, corrosion resistant, immersible sensor shall be provided. The Sensor shall be considered explosion proof and suitable for Class 1, Div. 1, Groups C & D and Class II, Div. 1, Groups E, F & G environments. The sensor shall be mounted a minimum of 12.0 inches (standard) above the maximum level to be monitored and in the event of being submerged, shall resume normal operation when the level returns to its normal range. The projected ultrasonic beam shall be no greater then 5¡ conical and suitable for use in a stilling well. Signal applied to the Sensor Cable shall be 60Volts peak to peak max to prevent possible harm to personnel and arcing of cable in the event of a loose connection or cable damage. Sensor cable may be shorted with no damage resulting to equipment. Signals greater than approximately 60 Volts applied to the Sensor Cable shall not be acceptable. The sensor shall be capable of being located up to 1000 feet from the Electronic Processing Unit, requiring no special pre-amps or other circuitry. The sensor shall have 3/4 inch NPT male pipe threads for mounting and a built-in temperature probe. Cable shall be a twisted pair shielded. Multiconductor cables shall not be acceptable.

2.6 SENSOR MOUNTING BRACKET

An optional corrosion resistant, PVC sensor mounting bracket shall be provided to accurately position the sensor. It shall have adjustable horizontal, vertical and angular capabilities.

2.7 ENCLOSURE

The Pump Monitor system shall be housed in a fiberglass enclosure rated NEMA 4X, IP65 (water-tight, dust-tight and corrosion resistant) with a clear hinged cover for viewing the display panel. The enclosure shall be suitable for wall mounting and withstand submergence to six feet.

2.8 WARRANTY

The Level Monitor shall be pretested, calibrated and 100% quality control inspected and be warranted against defects in parts and labor for one (1) year from date of shipment.

CONTROL ELECTRONICS, INC. P.O. Box 330, Brandamore, PA 19316

(610) 942-3190 FAX: (610) 942-3672

© 1999-2008, Control Electronics, Inc.