Automation System

Batching System / Silo Weighing System

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Our engineers provide professional recommendation for hopper and silo weighing and help our customers to integrate weighing capability into their system. New applications and modification for existing systems can be done with appropriate design and planning. We can help by participating in the early stage of system design, recommend structure modification and the components used, system installation and commissioning.

　

Loadcell / sensors

When properly installed and commissioned, a vessel can be weighed by integrating loadcells system into it. The application will determine the choice of loadcells being used. When choosing loadcells, we will consider different criteria, for example, vessel capacity, structure of the vessel, eccentric loading, thermal expansion, pipe connection, twisting action from mixing, the material characteristic, site environment and protection requirements.

　

T66LA Highlights: Capacity from 10 kg to 200 kg. Cantilever beam, stainless steel. Fully wielded to IP68. Loading assemblies are sold separately. Anti-vibration mount available. ATEX certification available for dust and gas.
T93LA Highlights: Capacity from 500 kg to 30,000 kg. Folded shear beam, stainless steel. Designed for silo, tank, hopper and vessel weighing*. The loadcell is being held in the loading assembly with 3 pins. The pins can be removed with just a pair of pliers and is very user friendly for installation and maintenance. *For vibrating or mixer applications, we recommend the T95LA model. Tolerant of misalignment. Autophoretic coated loading assembly. Fully wielded to IP68. Integral lift off protection. ATEX certification available for dust and gas.
VC3500LA Highlights: Capacity from 2,000 kg to 200,000 kg. Double ended shear beam, stainless steel. Designed for large silo, tank, hopper and vessel weighing*, off-shore models also available. *For vibrating or mixer applications, we recommend the T95LA model. Please contact us for more information. Allowance for vessel expansion and contraction. Galvanized, autophoretic coated or stainless steel loading assembly. Fully wielded to IP68. Integral lift off protection. ATEX certification available for dust and gas.
T30LA Highlights: Capacity from 100,000 kg to 600,000 kg. Column loadcell, alloy steel. Self-aligning loading assembly. Allowance for vessel expansion and contraction. Autophoretic coated loading assembly. Sealed to IP67. Integral lift off protection.
T95LA Highlights: Capacity from 2,000 kg to 20,000 kg. Folded shear beam, alloy or stainless steel. Excellent for vessel with mixing action and high accuracy applications. The unique design of the system put the loadcell in a pendulum like arrangement. The loading assemblies will transfer the compression load into a tension manner to the loadcell, giving the vessel a smooth floating feel. The self damping and centering characteristic of the loading mechanism provides a great zero position retaining ability and is ideal in vibrating applications. Autophoretic coated loading assembly. Fully wielded to IP68. Integral lift off protection. ATEX certification available for dust and gas.
LeverMount Highlights: Capacity from 20 kg to 5,000 kg. Matched with single ended shear beam or cantilever loadcells. Stainless steel loadcell element. Patented loadcell and mount. Unique and secure load cell installation/ removal without jacks. During installation or maintenance, the user can install only the loading assemblies without the loadcells under the vessel . The loadcells can then be inserted into the loading assemblies when ready. By tightening the two bolts at the end of the loadcell, the system acts in a pivot way and raise the loading point upwards and smoothly apply the load onto the loadcell, all being done without the help of a jack. The loadcells can also be removed easily in similar but reversed manner. Allowance for vessel expansion and contraction. 316 cast stainless steel mount. Fully welded to IP68. Substantial integral anti-lift. ATEX certification available for dust and gas.
MasterMount Highlights: Capacity from 2,000 kg to 20,000 kg. Matched with double ended shear beam shear loadcells. Stainless steel loadcell element. Unique load cell installation/ removal without jacking by using the built in cam mechanism. The loading assemblies has a specially designed eccentric shaft. During installation or maintenance, user can easily remove or insert the loadcell from/ into the loading assemblies by rotating this lifting shaft and lift up the load. The user can then adjust the four bolts in the corners of the loading assemblies to secure* the structure and the loadcell is ready to be removed or inserted. The process can be easily done without the help of a jack. The loadcell is secured in the loading assemblies by two round pins, which can also be easily inserted/removed without the help of any tools.  *Note: additional security is recommended if the system will stay idle without the loadcells for a prolonged period. Allowance for vessel expansion and contraction. Autophoretic coated loading assembly. Fully welded to IP68. Substantial integral anti-lift. ATEX certification available for dust and gas.

　

Instrumentation

When come to choosing the electronic instruments for process weighing, the functions, level of automation and protection level are what we are going to look at.

　

AND AD4531A Highlights: 　 The AD4531A has a very compact form factor with simple two HI and Lo set-point outputs. It is typically used for monitoring the material level of a storage hopper and provides alarms for HI/LO material levels. A typical use of the outputs is to initialize and stopping a refilling process. 　 Note: The peak holding function also make this indicator used for low-end testing applications (tension or compression test machines). However, for more demanding tests, we recommend AD4532A which has a much higher sampling rate (2000 sample/sec). Digitally processed signals with 16 times/s A/D conversion Peak hold and hold capability "Hold Mode" data stored digitally to prevent drooping on display and analog output Comparator function and output. Analog output with scaling and offset functions Full digital calibration-Digitally span calibrated by entering a sensor output voltage through the keyboard or input using the optional RS-232C interface. Data digitally held in memory. Hold and analog output are stored without any drooping. Easy on relieves user of repetitive adjustments. Compact DIN size body for digital key operating greater installation flexibility. Averaging time and display update rate can be selected for various applications. Digital display hold, peak hold and bottom hold. Replace circuit board and front key board without disconnecting any wires. Easy, fast and low-cost maintenance. Analog output with offset and scaling functions. Variety of data outputs: Average, digital peak hold, analog, hysteresis compensation comparison. Analog low-pass filter removes noise from signal inputs. RFI/EMI screened to comply with U.S., Canadian and other international regulations. Either standard data or digital peak data outputs are available through optional RS-232C, current loop or 4-20mA analog output interface.
AND AD4401 Highlights: 　 This is a very popular choice of indicator for single ingredient batching or proportioning process. Its built in process weighing procedure provides complete single ingredient weighing from two speed feeder control, free fall correction, to discharge of material. This keep PLC programming to minimal and, in simpler applications, completely avoid the need of a PLC. It also vastly reduces the cost and time for system development. The indicator provides 'Gain in weight' and 'Lose in weight' procedures for different needs. User can enter the target weight via the front panel, an external thumbwheels or even through the serial interface (optional RS-232 or RS-485). The process can then be started by triggering a switch and the system will run complete the whole process. 100 times/sec. High speed sampling. High display resolution to 16,000 counts. Up to 1 million counts of A/D resolution. Monitor & control weighing and batching with external or internal resolution. Fuzzy and Automatic Free Fall Compensation (AFFC) for consistently accurate batching results. Enter control set points through front keys or remotely though external thumb wheels. Automatic weight and/or count accumulation. Sub display provides feedback on all set points& simplifies calibration. Supplementary flow function assures accurate performance on each batch. A host of communications capabilities: RS-232C, RS-422/485, BCD, analog output and standard 4-20mA Current Loop. Connect up to 10 AD-4401's with A&D's RS-422/485. Compact DIN size housing speeds installation & reduces space. Digital Span Calibration enhances technical support and difficult installations. Splash proof front panel and keys (IP-65). High sensitivity 0.3(µV/d for more accurate measurements. Automatic batching and customer programming capability. Bright, clear fluorescent displays. Hold and peak hold functions. User programmed timer settings and alarms. Improve operational safety & performance. Weigh-in and Loss-in-Weight batching.
AND AD4402 Highlights: 　 The AD4402 specializes in multi-ingredients process weighing. A single vessel is monitored and provides a very comprehensive procedure for weighing multiple ingredients. User can create, edit and use recipes for up to 99 different products. Each recipe will contains all the information required for actual production, for example, which ingredients to use, the target weight requirement for each ingredient, feeder controls and tolerance check of the final weight. Connectivity of the indicator is also top notch, from the basic RS-232 or RS-485 interface to different industrial standards like CC-Link, Device Net and Profibus (separate options required). Maximum number of ingredients per recipe is 10. Maximum number of ingredient for feeder control purpose is 20. 100 times/sec. High speed sampling. High display resolution to 16,000 counts. Up to 1 million counts of A/D resolution. Large and easy to see blue Vacuum Fluorescent Display (VFD). Uses a ten—key pad and function button that are designed for ease of operation and understanding. The main display has a 7—digit VFD with 18mm tall characters. The sub display has a total of 54 5mm—tall dot matrix characters and displays the values and error comments. Pre-programmed with multiple sequences and functions for filling machines, simple mixing machines and a weight-checker and other applications. Stores 100 data for raw materials and 100 data for mixing codes. RS-485 Serial Output (Current Loop) standard feature allows you to link up to 32 units to the display. The Monitor Function shows each operating interface and provides a confirmation on the display. The compact body meets DIN requirements, while minimizing the depth of the indicator to135mm. With the proper optional interface, the AD-4402 is compatible with CC-Link, Device Net, PROFIBUS. Standard Modbus function available.

RiceLake 920i Highlights: 　 The 920i is one of the most powerful standalone indicator for process weighing. The whole process flow are completely programmable to suit each customer's applications needs. Up to 10 different screens can be programmed to change with the process, and graphic icons and messages show set-point and function status. The multi-channel display feature shows the weight on an individual scale or a combination of totalized scales. When used in batching/mixing applications, one 920i is capable of handling multiple scale, flow temperature and pulse. It can control hundreds of I/O set-points, queuing such things as gates and conveyors. And, it has complete database capability for data storage. The system can also have a   PS/2 keyboard directly connected to it and allows the user to operate and enter alphanumeric data. 　 Sam Hing can provide a complete solution to our customers, starting from process planning, database structure modeling, user interface design, programme coding, system commissioning and calibration. Large (4.6”W x 3.4”H, 320 x 240 pixel) black-lit LCD graphical display. Selectable character sizes from .25” to 1.2”. 60 configurable operator prompts. Display up to four scale channels per screen with required legal-for-trade information 32 scale accumulators. Five soft keys with 10 user-defined, 14 preset functions per screen. 10 programmable display screens. Milli-volt calibration, 5 point linearization and geographical calibration. NEMA 4X/ IP66 stainless steel enclosure. Wall mount and panel mount models also available. Selectable A/D measurement rate up to 960/second. 100 set-points, 30 configurable set-point types. Two slots for option cards. 1000 ID-truck register for in/out weighing. 64k user on-board NV/RAM. User programmable 128k flash memory. Reflash memory to upgrade firmware. Power for 16, 350 Ohm loadcells per A/D board.

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