On-board weighing systems on construction machines

On-board weighing on wheel loaders

  • 2 hydraulic pressure sensors measure dynamically while lifting on both sides of the pistons in the lifting cylinders,
    Weighs at any lifting speed thanks to the double proximity switches on the lifting boom,
    Installation can be done on any wheel loader, from small to big sizes, new or used and all brands.

    Having a longer lifetime than the wheel loader itself, it is often transferred from the old to the new truck.

    Weighing microprocessors PFREUNDT WK60XS, WK60S or WK60 have following common features: 
    + Accuracy: 1%
    + Accumulation of consecutive weighings
    + Subtract from a target weight
    + Target weight of the last bucket can be easily achieved
    + Stand-by button: weighings are temporarily inhibited
    + Color touchscreen display with alphanumeric keyboard with hardened safety glass.

Les nombreuses possibilités sur WK60XS, WK60 et WK50S telles que décrites ci-dessus, peuvent être activées ou désactivées lors de l’installation, afin de répondre au mieux à vos besoins.
Notre valise de démonstration vous démontrera les nombreuses possibilités et la facilité d’usage.

Type WK60XS WK60S WK60
       
Display size 5″ 7″ 7″
Can be stamped to class Y(b), for building materials, raw materials, some waste products no yes———- yes———-
Calibration for max. x buckets; can not be stamped 2, option 5 5 5
Printer on slips or roll only slips yes yes
Manage day, week, month, year and everlasting total only “day” yes yes
Databases
+ customers with name, address, phone, note, payment conditions,
+ products with density, price and note,
+ driver,
+ trucks with payload,
+ building sites with address,
+ containers.		 10,
option
300		 500 10.000
Database of last xxx weighings 250,
option
1000		 10.000 50.000
Alibi memory no yes yes
Show and print volume no yes yes
Weighing slip with prices and VAT amount for cash payers no yes yes
Separate weight for truck and trailer no yes yes
Cumulative slips for repeated but non-consecutive weighings, for instance at the crusher output no yes yes
Transfer of weighing data with USB-stick, CSV format yes yes yes
Transfer of basic data and weighings by WLAN from/to Pfreundt Webportal option option yes
Transfer of basic data and weighings by GPRS from/to Pfreundt Webportal no option yes
Weighing software dedicated to your business no no option
Manage orders and recipees no no option
Link to a network printer no no option
Upgradable to more sophisticated microprocessor – – to WK60 – –

The various possibilities on WK60XS, WK60S and WK60 listed above can be switched on/off at the time of installation, according to your application/requirements.

Watch a short video

On-board weighing on dumpers

Avoid overloading which causes breakage and premature wear on the truck, 
optimise the dumper loading to improve efficiency.

Dynamic measurement while tipping off,
for small or big dumpers, with rigid or knick dumpers,
Fully automatic registration of the transported mass, of driving, loading and stop times, of the driven distances empty and loaded, as well as the overloaded occurrences.
Shows a detailed productivity report of the driver and his dumper,
Microprocessor PFREUNDT WK50.
The accuracy depends from the equal spread of the load on the dumper.

Options:
+ integrated or separate printer on slips or roll of paper,
+ transfer to PC of weighing data by memobox or GSM.

On-board weighing on cranes

On truck cranes with 3 rated capacities: 1000, 2000 and 5000 kg, 
Stronger construction on hydraulic cranes: 10, 20, 45 and 100 tons,

Compact round casing with limited building height,
Integrated damping and pivoting suspension of the load cell in the casing,
Can be stamped in class OIML III (0,1%), which guarantees its accuracy and gives confidence to your customers,
Data transfer from load cell to display by cable or by radio when built on telescopic booms.
Doesn’t need any modifications on crane nor hook.
Dedicated software with microprocessor PFREUNDT WK50,

Applications: 
– log handling, glass containers, …
– scrap loading,
– unloading of barges and small ships,
– agricultural contractor.

Options: 
+ printer,
+ transfer to PC of weighing data by memobox or GSM.

Note: smaller crane scales for static applications are also available.

On-board weighing on crushers, road milling machine and belts

A current roller station is built on a PFREUNDT weigh beam,
with a tachometer,
with a slope meter when the angle is variable,
specially built for heavy applications in quarries, on mobile crushers and road mills,
microprocessor PFREUNDT WK50, usually built into a steel cabinet,
the LCD display shows the flow (tons/hour) and the total amount of moved material,
3 separate subtotals.

Easy installation on almost any belt conveyor.

Options:
+ integrated or separate printer on slips or roll of paper,
+ transfer to PC of weighing data by memobox or GSM.
+ productivity statistics,
+ analogue output for process control,
+ connect several belts via CANBUS to one PFREUNDT WK50 microprocessor or to your computer.

Weighing system on board of a telescopic handler

+ weighs when the telescopic boom is retracted or extended; to be decided at time of calibration,
+ normal accuracy about 1%, when truck is fitted with a bucket, worse with forks because the load center can vary, hence the weight arm and lifting force,
+ digital display in the cabin.

Options:
+ printer on tickets or paper roll,
+ transfer of weight data to PC by chip card or GSM,

2 measuring principles are available:
A. Measure the hydraulic pressure:
a pressure transducer must be inserted between the check valve and the lift cylinder,
an inductive switch detects when the boom is at the proper height.

B. A strain gauge measures the bend of the boom:
independent of the hydraulic system condition and built-in valves,
permanent signal allows to mix and dose