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
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:
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.
SEKO Forklift Class II modules, the truck lift capacity is
reduced by about 10 to 14%, making the maximum new lift rating of a
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
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.