Ipa Private Limited Peenya, Bangalore, Karnataka

Movement of bulk material is an essential feature in modern industrial processes. The simplest and fastest mode of transportation of such material is to convey them over a moving belt. In this operation the precise weighing of material, as it moves, has assumed a key role in process industries. Hence weigh feeder is a closed loop control system in which a precise control can be had over the flow of materials, which has indicating, totalizing and controlling instruments and circuits. The Weigh Feeder is a custom engineered equipment that finds application in continuous bulk proportioning of solids. This gravimetric feeder is operated by a closed loop control system enabling feeding at a controlled rate and exercises precise control over rate of flow based on a micro controller. The system is capable of accepting external signals from other controllers or from the process computer, depending on the extent of plant instrumentation. These gravimetric feeders are in operation in steel, cement, fertilizer and chemical industries. Each system consists of control and local panels, load cells to measure the instantaneous load, a digital tacho to sense the speed of the belt and a belt feeder conveyor shaft is driven by an AC motor coupled through the gear box.

In this type of crane weighing system, the entire top block pulley arrangement is placed on 2 loadcells as shown in the scheme below.The advantage of the system is that the maximum number of ropes is weighed by the weighing system and therefore the accuracy of this system is the highest. However the capacity of the loadcell would be higher as it has to weigh the weight of the pulley and the entire assembly apart from the load. The output from the loadcell corresponding to the load applied is processed and displayed digitally in the indicator housed in crane control cabin. The output from the loadcells corresponding to the load applied is processed and displayed digitally in the indicator housed in crane control cabin. A separate parallel 50100200300 mm display is also provided at the girder of the crane to enable viewing of the weight from the floor. The system has a potential free contact that would be activated if the crane is over loaded. It is possible to transmit the data from the weighing electronics to a base station receiver through Wi-Fi or ZigBee protocol. There are opotions for the electronics to communicate with the crane PLC via analog output or any communication protocol such as MODBUS or Profibus. The power supply for the system is taken from the single phase AC 230V available in the Crane Cabin. A switch mode power supply is provided internally so that it will take care of voltage variation as well as spikes.

The universal shear loadcell is generally used for material testing and in applications where both compression and tension loads are to be monitored. Bag Filling, Hopper Weighing Systems, UTM & Testing applications, Electro Mechanical Weigh Bridges.

The system finds extensive use in process industries where monitoring the quantity of materials coming out after completion of a process, especially where materials like powder, granules etc. are used, which comes out at a very low rate, say in the order of under 5T per day or lesser. It is extensively used in the tea industry. The system consists of a buffer hopper and a weigh hopper both provided with gates. The weigh hopper is mounted on loadcells. These loadcells are connected to an indicator where the set value can be entered. As soon as the weight in the weigh hopper achieves the set value, the buffer hopper gate closes and the weigh hopper gate opens to discharge the weighed quantity of material on to a down stream process line. The electronic indicator registers the exact quantity of material. As soon as the weigh hopper becomes empty, the gate closes and the buffer hopper gate opens and the process continues.

Strain Gauge manufactured by IPA are of foil type and comes in two different impedances which are 120 Ohms and 350 Ohms. These are used in the manufacture of loadcells and various strain measurement applications. We also manufacture nickel gauges for : Span compensation Temperature compensation

These metering devices are used to measure the flow rate of very fine particles like fly ash, cement etc. The material flows by gravity through an air slide and flows over a plate which measures the impact which is proportional to the density of the material and the flow rate. The impact on the plate is measured by two high precision loadcells that give a very linear output proportional to the flow rate. The output of the loadcells are fed into the micro controller based flow rate indicator which gives the rate and totalized quantity of material. The solid flow meters can be used in series with a rotary air valve or dozing valve to have a controlled feed of material. These metering devices are extensively used for truck loading and fly ash handling systems. Call us for quality solid flow meters in India.

Similar to the bending beam, the shear beam loadcells can be used in very harsh industrial environments for measurement of compressive and tensile forces. Tank weighing and vessel weighing, dynamic weighing typically in conveyor applications, platform scales etc.

Signal Conditioners is a wall-mounting instrument compatible with strain gauge based transducers. It can support a maximum of 4 transducers when they are connected in parallel. Signal conditioners are used to accept for further processing of output signals. After which they are converted into voltages and currents. Voltage signals are used for processing with in the system and current signals are used for transmitting over long distances and then for further processing. The features of the signal conditioner are: • Output proportional to load • Simple to operate • Reliable • Easy to install • Rugged designed for industrial environment

The envisaged Built-in Crane Weighing System consists of high precision Shear Pin type loadcell which is used as a shaft in the equalizing barpulley. The shear pin loadcell replaces the equalizing pin holding the euilizing pulley. These loadcells can be custom built to the size of the existing pin in the crane. Crane manufacturers can chose from a list of standard sizes which are usually in stock. The output from the loadcell corresponds to the load applied and is processed and displayed digitally in the indicator housed in crane control cabin. A separate parallel 50100200300 mm display is also provided at the girder of the crane to enable viewing of the weight from the floor. The system has a potential free contact that would be activated if the crane is over loaded. It is possible to transmit the data from the weighing electronics to a base station receiver through Wi-Fi or ZigBee protocol. There are opotions for the electronics to communicate with the crane PLC via analog output or any communication protocol such as MODBUS or Profibus. The power supply for the system is taken from the single phase AC 230V available in the Crane Cabin. A switch mode power supply is provided internally so that it will take care of voltage variation as well as spikes.

In the case of conveying of bulk materials which has material characteristics like free flowing by nature, which packs under pressure, which are very light and fluffy i.e., may be windswept and materials with very high temperature, in such cases belt feeders are not suitable ; only Screw Feeder are recommended. The Gravimetric Screw Feeder is custom engineered compact, enclosed and eco-friendly equipment that finds applications in continuous bulk proportioning of solids. This gravimetric feeder operated by a closed loop control system enables feeding at a controlled rate and exercises precise control over rate of flow. The system is capable of accepting external signals from other controllers or from the process computer, depending on the extent of plant instrumentation. These gravimetric feeders are in operation in cement, fertilizers and chemical industries. Each system consists of control panel, local panel, loadcell to measure the instantaneous load, tacho to sense the speed of the screw which is mounted inside closed trough. The screw shaft is driven by a constant speed AC motor coupled through a gear box.

Rope tension loadcells are very simple to install. However they can be installed only where there is a fixed non moving rope. The installation scheme is shown below. This arrangement would be able to measure the load on one rope of the total number of ropes of the crane. Therefore in principle the accuracy of this type of system would be the least. However, the advantages of this system are as follows. • Simple operation • Reliable – No periodic maintenance • Easy to install • Rugged-designed for industrial environment. The output from the loadcell corresponding to the load applied is processed and displayed digitally in the indicator housed in crane control cabin. The output from the loadcells corresponding to the load applied is processed and displayed digitally in the indicator housed in crane control cabin. A separate parallel 50100200300 mm display is also provided at the girder of the crane to enable viewing of the weight from the floor. The system has a potential free contact that would be activated if the crane is over loaded. It is possible to transmit the data from the weighing electronics to a base station receiver through Wi-Fi or ZigBee protocol.

Loss in-Weigh Feeders operate on the principle of controlled loss-in-weight. The proposed system comprises of a Weigh Hopper, Loadcells, Screw Conveyor with motor and associated control electronics. The Weigh Hopper and Screw Conveyor are mounted on 3 Nos. of Loadcells. The Loadcells are connected to a controller through a junction box. The material from the storage hopper is fed to the weigh hopper, which is controlled by a gate. A small screw feeder is mounted below this weigh hopper. The weigh hopper and screw feeder are mounted on high precision Loadcells and the output of the Loadcells are summed in a junction box and fed as an analog input to the controller. The controller calculates the rate, compares with the set rate and feeds the corresponding 4-20mA signal to the VVVF drive so as to control the speed of the motor of the screw, thereby controlling the rate of discharge.

The shearbeam load cell can be either cylindrical or rectangular. The strain gauges are placed at the bottom of the blind holes. The strain gauges are mounted on the beam at 45 degrees to the longitudinal axis. When the load is applied to the beam, gauges along 45 degrees become longer (tension), along 135 degree become shorter (compression), thereby unbalancing the bridge. The shear beam load cell is insensitive to lateral forces, and point of application of torque is not critical. Shear Beam Loadcells with IP-68 protection is used mainly for Lorry Weigh Bridges.

Double Ended Shear Beam loadcells are designed for central mounting and loading on either side. This type of configuration ensures that the output of the loadcell is not affected by lateral loads. It is very rugged and is IP 68 protected. It is widely used for lorry weigh bridges (truck scales) and for silo weighing applications and where there is movement inside or outside the vessel like batching cars etc.

This is a field-programmable indicator designed to be used with strain gauge based transducers. The salient features are: Simple installation. Accurate operation under varied condition. Unambiguous digital display, distant visibility. Micro-controller based operation. RRS232ModbusProfibus communication options. The indicator can be programmed through keypad for range, resolution, filter time constant, decimal point and set points. Tare, calibration and system reset are also performed through keypad. The front panel has got digital display and keypad. Hopper tanksilo weighing application • Peak load indicator • Bagging machine • Lorry weigh bridge application • Wagon tippler application • Dynamic weighing such as Belt weighers • Loss in weight application • A host of other custom built applications can be built over this little wonder.

DK145A0 & DK245LO is a field-programmable indicator designed to be used with strain gauge based transducers. The main features of this equipment are Simple installation Accurate operation under varied condition Good accuracy and high resolution Unambiguous digital display, distant visibility Micro-controller based operation RS 232 output The indicator can be programmed through keypad for range, resolution, filter time constant, decimal point and set points. Tare, calibration and system reset are also performed through keypad. The front panel has got digital display (LED) and keypad. The power supply, input and output are at rear end.

DH340A0 is a field-programmable indicator designed to be used with strain gauge based transducers. The main features of the indicator are High resolution Tare and Calibration through keypad RS 232 output for serial communication Serial output for remote display Hardware lock facility The indicator can be programmed through keypad for range, resolution, filter time constant and decimal point. Tare, Tare recall and calibration are also performed through keypad. It is provided with hardware lock facility to avoid unauthorised setting changes. The front panel has got digital display and keypad. The power supply, input and output are at rear end.

A135A1 is a 3-½ digit, panel-mounting indicator capable of reading upto a maximum of 1999 for an input of 15mV DC with a sensitivity of 10 mVdivision. It is compatible with strain gauge based transducer like loadcells, Pressure Transducers, Torque Transducers etc., which have 350 ohms bridge resistance. It can support a maximum of four transducers when connected in parallel. The system provides a very stable power supply of 10V DC for excitation of the transducers. It consists of a differential amplifier to amplify the signal from the transducers. The circuitry is based around an Analog to Digital converter (ADC). The ADC drives a 7-segment, 13mm height LED display. The system provides an output of 0-10V corresponding to the applied load. OR The system provides a current output of 4-20mA corresponding to load applied.

The envisaged Built-in Crane Weighing System consists of Compression type loadcells placed underneath the mechanical assembly supporting the equalizing barpulley. The typical arrangement is shown below. The output from the loadcells corresponding to the load applied is processed and displayed digitally in the indicator housed in crane control cabin. A separate parallel 50100200300 mm display is also provided at the girder of the crane to enable viewing of the weight from the floor. The system has a potential free contact that would be activated if the crane is over loaded. It is possible to transmit the data from the weighing electronics to a base station receiver through Wi-Fi or ZigBee protocol. There are options for the electronics to communicate with the crane PLC via analog output or any communication protocol such as MODBUS or Profibus. The power supply for the system is taken from the single phase AC 230V available in the Crane Cabin. A switch mode power supply is provided internally so that it will take care of voltage variation as well as spikes. Accelerometer utilizes the spring-mass system for generating a force proportional to the amplitude of the input acceleration to the base of the system. Force is applied to the piezoelectric (PE) element made of leadzirconate – titan ate (PZT) material that produces a charge output proportional to the force. The PE material is self-generating and does not require an external power source.

General Purpose Compression type load cells with IP-68 protection are widely used for Tank and Hopper Weighing System, Batching Plant, Silo Weighing System, Roll Force Measurement, etc.

Column type load cells with IP-68 protection are widely used for Roll Force Measurement, Silo Weighing System, Bin Level Monitoring system, etc.

These are low profile compression loadcells used in applications where there is a space constraint. Applications: TankHopperSilo Weighing Systems, Hydraulic Press Applications etc

The Binocular Ring Loadcell has an IP-68 protection perfectly suited for industrial applications.Based on the bending beam principle it has excellent repeatibility and accuracy. APPLICATIONS:- Platform Scales Test Purpose Hopper Weighing System Dynamic Weighing Systems like Belt Weigher, Weigh Feeder, Screw Feeder and Bag Check Weigher etc Batching System