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SEKO Forklift Scale
1478 Beechcraft - Rawlins, Wyoming USA 82301
Accurate, Reliable and Rugged Forklift Scale Technology
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North America
  Toll-Free  800-594-9288  Direct  307-321-4505

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Technical Information
Calibration Commentary
Preliminary Discussion:
SEKO Forklift Scale Electronics consist of two primary components: The Weight Sensing Mechanism Sensors (Weigh Modules) and the Control/Indicator (operator interface).

The sensors and weighing mechanics are "dumb", providing a weight signal from the weigh modules in raw form. The loadcells produce a voltage signal with an unamplified signal of 3 mV/Volt. The conversion from this low-level signal is produced by the Control.Indicator (operator interface). All of the amplification, buffering, averaging etc. is accomplished in the cab, not at the weighing mechanism. This is a simple industry standard configuration, requiring cables and other wiring from the weigh modules to the Control/Indicator for processing and display.

In operation, the essential SEKOForklift Scale modules are mounted on the forklift carriage and the original forks are mounted on the weigh modules. The Scale Indicator is installed in the truck cab and connected to the signal cable and truck power. This completes the scale installation.

Since each installation allows the user to select forks and accessories, those components place a load on the scale, offsetting the scale weight indication by the weight of the forks (and accessories). This empty fork offset is essentially a fixed tare, which is compensated during the initial "ZERO" calibration.

A 5,000 pound weigh capacity scale will normally display "0" for no weight and "5000" for the 5,000 pound maximum weigh load.

Forklift lifting capacity de-rating due to addition of scale module:
The  SEKO forklift weigh module for Class II and Class III push the forks away from the carriage 6 inches. In addition, the Class II weigh modules weigh about 98 pounds each, so there is an additional de-rating of fork truck lift capacity due to the weight of the scale modules. Each truck must be evaluated to determine the de-rating of the truck safe lift capacity, both in absolute weight lifted and also in the shift of the load center-of-gravity. You will find the dimensional and weight information in the manual for your particular truck make, model and often, serial number. It is a good practice to consult yoiur forklift dealer to determine the accurate de-rate adjustment and to acquire an supplementary data plate.

For the  SEKO Forklift Class II modules, the truck lift capacity is reduced by about 10 to 14%, making the maximum new lift rating of a 5,000 pound safe lift, reducing to 4,500 pounds or less (nominally). Remember, that weight capacity must also be reduced by the weight of the fork(s). If you are adding an attachment, such as a side-shifter or rotator, those attachments will also contribute an additional weight and load center de-rating.

SEKO Forklift Scale Technical Support:
Please consult with  SEKO Sales and Tech Support for assistance with calculating de-rating for your particular truck and application. We can also offer an Excel-type spreadsheet for easy automated calculation estimates. You should always consult your truck dealer or manufacturer for the best available information.

Finally, the Control/Indicator selection and setup will require adjustment in order to display accurate weights. Control/Indicator setup and calibration are covered in detail in the Indicator manufacturer's manuals.  SEKO Forklift Scale Tech Support is available 24-7 to assist your work.

SEKO Forklift Scale Tech Support: Call 800-594-9288 or direct at 307-321-4505 any time - 24-7.

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SEKO-NA Forklift Scale Logo  Maple Leaf Image  US Flag Eagle
Global Contact:
North America:
Toll-Free  800-594-9288 
Direct 307-321-4505
Fleet Sales
George Murphy Sales
Toll-Free: 844-917-5264

Henry Nicolle
Last Revisions: 01 December, 2016