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DF3500 CONVEYOR SCALE AND RATE FEEDER WEIGHT INDICATOR
The DF3500 weighs a continuous load on a running belt to display flow rate and total delivered weight. Scale weight and belt speed readouts may also be selected. A pulse encoder is utilized for variable speed belts. Fixed speed belts use a centrifugal force switch or a pulsed idler switch. The display update rate is automatically determined from the encoder input rate. The flow rate is averaged for a steady display. Two setpoints are provided for each rate and total. Pulse outputs for a mechanical counter with "clear" feature and 4-20mA analog output for flow rate are also available.

FEATURES
Selectable displays of flow rate, accumulated total, belt speed and scale weight.
1" (25mm) high L.C.D. digits with automatic backlight and status annunciators.
Keypad calibration - no pots or switches.
Battery backed-up totalizer and zero registers.
Belt running detection.
Mechanical counter pulse output, including clear.
Serial communications to printer, host computer or remote display.
Optional 4-20mA rate output.
Optional rate feeder closed loop speed control.
Keypad selectable rate and total setpoints.
C.S.A. approved.

TECHNICAL SPECIFICATIONS
Flow Rate: 1 lb or 1kg per hour to 999ton or tonne per hour.
Accumulating totals to 999999 lbs, ks, tons, tonnes.
Maximum Belt Speed: 999.9 ft/min. 999.9 m/min.
Programmable scale capacity.
20 kHz maximum speed encoder frequency.
Load Cell Requirements: 2-3 mV/V output, up to four 350 Ohm load cells.
Serial Port: RS232 compatible, 75 to 9600 Baud.