Bag Filling Machine using Load Cell Input


Our customer manufactures machines for loading produce into bags at preset weights. A conveyor carries the produce to the bag. The conveyor speed controller slows the conveyor when the bag nears the required weight. The bag is hung from a load cell which feeds the weight to the Tiger 320 meter controller. When the bag is near the required weight, a setpoint in the meter slows the conveyor. When the bag reaches the required weight, the meter automatically compensates for produce inertia and determines when to stop the conveyor and close the conveyor feed gate. The display flashes between "BAGFUL" and "WEIGHT". The operator unclamps the bag, and the meter counts and totalizes the bag number from the bag clamp microswitch pulse. The operator fits a new bag and the clamp closes after a 1 second delay to stabalize the load cell.

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Beam Stress Test


Our customer carries out stress tests on beams to determine the peak load pressure and the linear displacement reading at the point of failure. Texmate installed a Tiger 320 Series DI-50E meter configured to display and hold the peak readings, load pressure on Channel 1, and linear displacement on Channel 2.

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Dispense Tank Product by Weight


Our customer has a tank supported on a load cell and requires to dispense measured amounts of product from the tank. Texmate installed a Tiger 320 Series DI-50E meter calibrated to indicate the product weight in the appropriate engineering units. The meter is installed with two remote push-button switches configured as TARE and TARE CLEAR. All non-application codes are blanked out. Relay 1 is connected to the tank outlet valve. The amount of product required is programmed into the meter at setpoint 1. Setpoint 1 is programmed with initial startup inhibit and relay latch OFF. _(See Setpoints & Relays Supplement (NZ201) for full details.)_

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Dual Load Cell Pinch Roll Feeder


Our customer has a feed roller system. They require to monitor and maintain a constant pressure between the two ends of the bottom roller to maintain a straight feed. The bearings at each end of the bottom roller are mounted on a separate load cell. The output from each load cell is connected directly into a Tiger 320 Series controller.

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Dual Tank Level Annunciator-Controller


A bakery customer has two tanks containing a release agent that is sprayed into the baking trays. If the release agent runs out, the bread sticks to the trays. Two release agent drums, TANK 1 and TANK 2 are placed onto two independent load-cell platforms and both load cell outputs are connected to a dual load-cell input module installed in a DI-60AT controller. 1. On start up, TANK 1 valve is open. 2. When TANK 1 low level (set-point 1) operates, TANK 1 valve closes and TANK 2 valve opens. 3. The system is now operating from TANK 2. 4. TANK 1 is replaced, TANK 1 low level alarm is now OFF. 5. When TANK 2 low level alarm operates, TANK 2 valve is closed and TANK 1 valve is opened. 6. The sequence is repeated.

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Filling Application using Load Cell Input


**Avoid costly motor and speed controllers for filling applications by using precise digital setpoint tracking.** The combination of a DI-60A programmable meter controller fitted with a smart load cell input module does just this, delivering accurate and reliable digital process control. The container is placed under the tank outlet. The start button is pressed, the display is reset to zero (Tared), the valve opens and the motor starts running until setpoint 1 is reached. The motor switches off and before the motor and pump stop completely (due to the motor inertia), the fill weight is reached and setpoint 2 is then deactivated at the fill weight and the valve closes.

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Fruit Weighing Application


Our customer operates a fruit packhouse. His customers deliver their fruit in large bins for grading, packing and distribution. The full bins are loaded onto a conveyer and then transferred to a load cell weighing platform. The bin raises to a weigh position and then stops. After a 1 second delay (load cell to stabilize) the full bin is weighed. The bin then raises and tips the produce onto a second grading conveyer. The bin then returns to the load cell weigh position and stops. After a 1 second delay the empty bin is weighed.

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Melt Pressure Sensors with Shunt Calibration Option


The melt pressure of a plastic extruding or moulding process is an important parameter to measure and control. However, to obtain a reliable reading of the melt pressure requires the pressure transducer to be calibrated at the melt temperature of the plastic. For moulding machines that are used with more than one type of plastic, calibration must be performed for each type.

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Payload from a Weighbridge


Our customer operates a trucking company and requires a printed record of the weight of the load being carried. Texmate installed a Tiger 320 series DI-50E meter with a permanently connected serial printer and two remote pushbutton switches. The meter is connected to the weighbridge, calibrated to read in the appropriate engineering units, and programmed for the remote tare functions with all non-application codes blanked out.

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Press Control Peak Overload Application


The Texmate 320 Series bargraph controller samples at 50 times/second for this application. The press operates at 60 strokes/minute. The load cell output is rapidly changing up and down during each stroke of the press. The operator requires the display to be held at peak value for as long as practical.

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Resin to Roving Ratio and Progress Monitoring System for the Composite/Fibreglass Industry


Our customer requires the amount of resin and roving used during their manufacturing operation to be calculated, monitored, and recorded on a job-by-job basis, providing them with accurate costing and stock information. Texmate installed a Tiger 320 Series controller and connected it to the resin feedline flow transducer and the roving weighing platform pressure transducer.

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Weigh and Ratio Batching Application


Our customer requires varying amounts of primary and secondary chemicals to be mixed by ratio. To improve mixing, accuracy and save time, the ratio calculation is automatically performed by a macro. A container is placed on a weighing platform and the platform is tared to 0. The primary product is poured into the container. The operator enters the required mix ratio and presses the start button.

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Weighing Application with Zero Offset Limit


Our customer operates a crane with an electromagnet to lift and weigh scrap metal. Due to residual scrap metal remaining attached to the electromagnet it needs to be set to zero regularly by the operator during daily operations. For safety reasons and accuracy, the electromagnet must be cleaned when the amount of residual scrap reaches a set limit.

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