CONTROL ELECTRONICS, INC.

1.0 SCOPE

These specifications describe a model DLC-700FL Microprocessor Based, 4-20 mA. Input Liquid Flowl Monitor as manufactured by Control Electronics, Inc.

2.0 DESCRIPTION

The DLC-700FL Flow Monitor shall provide continuous measurement of liquid Flowl in any standard Primary Flow Device.

2.1 ELECTRONIC PROCESSING UNIT

a. The DLC-700FL Flow Monitor shall be a microprocessor controlled unit with front panel, menu based programming and alpha numeric operator interface. It shall provide two 4-20 mA analog output signals proportional to Flow 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.

b. The Monitor shall accept a proportional flow depth or flow rate 4-20 mA. signal. A programmable exponential function for mathematical conversion of measured depth to a GPM flow rate and total gallons shall be provided.

c. 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.

d. The calibration (scaling) of the Flow Monitor shall be accomplished from the front panel and shall accommodate spans of 0-999999.99 GPM full scale flow rate. All settings and readings shall be displayed in 0.01 GPM increments.

e. The Flow 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.

f. The Monitor shall have an internal 24 VDC power supply for Loop-Powered 4-20 mA. Sensors.

g. The Flow 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 Controller will automatically reset itself to the users programmed settings.

h. Lost-Signal Logic shall be programmable. In the event the 4-20 mA input signal is lost, the Monitor will alert the operator.

i. All programmed Data shall be saved in non-volatile memory to prevent loss upon power failure. The Flow Monitor shall restart with no operator assistance upon return of power. A 12 volt DC battery may be connected to the Controller for continuous operation during a power outage.

j. The analog output signals shall be repeatable to ±0.4% of range; accuracy shall be ±0.8% of range.

k. 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 instantaneous flow indications in GPM, MGD, PERCENT of flow, and TOTAL GALLONS ,as well as Time Stamped Data Logging history and all programmed variables.

2.3 DATA LOGGING

TheFlow Monitor shall have built-in, Time Stamped Data Logging capabilities, with a programmable logging rate from 0 to 99 minutes of average GPM flow rate. In addition, daily time-staming of Minimal, Maximum, Average GPM and Toal Gallons for each day of the month (200 days) shall be logged for later viewing. An RS-232 output (opt. USB port) shall be available to download the data logg to a PC directly or by MODEM for remote monitoring. No special software is required to retreive data. The user may use Microsoft's HYPER-TERMINAL in Windows 95/98/2000 to download preformated data.

2.4 ALARM / RELAY OUTPUT

Five (5) 5 Amp SPDT relay closures shall be provided as Alarm/Pump/Sampler control contact outputs. Four (4) relays shall be programmable with the ability to establish independent ON-OFF settings of each relay for differential control. One (1) relay shall be programmable as a Sampler Pulse control (250 ms relay closure duration) in 0-999999 gallon increments.

2.5 ENCLOSURE

The Flow 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.

2.6 SENSOR INPUT

The Flow Controller shall accept any standard 4-20 mA. signal proportional to level or flow. Sources may be Pressure Sensors, Ultrasonic Sensors, Bubbler System, flow meters etc.

2.7 WARRANTY

The Level Controller 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

© 1999-2006, Control Electronics, Inc.