Forklift Scale Electronics are unusual for scale installations.
Most scales consist of two primary components: The Weight Sensing
Mechanism and Sensors and the Control/Indicator (operator interface).
In the common scale, the sensor and weighing mechanics are "dumb",
providing a weight signal from a transducer in raw form. Most loadcell
and pressure sensors produce a voltage signal with a common range of
1.8 mV/Volt or 3mV/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 and industry standard
configuration, requiring cable sand other wiring from the weigh lifting
mechanism to the Control/Indicator for processing and display.
Technical Innovation by SEKO
We have listened to forklift users for many years complain about
complications, wasted time and expense resulting from problems with
calibration, wires and operator diligence. We have responded to those
complaints by making the SEKO
Forklift Scale orders of magnitude more
rugged and intrinsically more accurate and repeatable on the mechanical
side. Then, we looked to contemporary technical advancements in
production precision electronic components and advances in extremely
low power micro-computing. We designed a complete, extremely low-power
scale circuit powered bymodern lithium battery technology. These
innovations allow us to embed the actual scale
electronics and battery-power in a sealed enclosure within the scale
module itself, eliminating wires, cables and battery-chargers.
Additionally, since the scale electronics are embedded in the scale
weigh module, each weigh module can be factory calibrated for instant
installation and weighing.
In operation, the essential SEKO
Forklift Scale modules are mounted on
the forklift carriage and the original forks are mounted on the weigh
modules. 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 instantly
compensated by the operator pressing the "ZERO" button. The scale is
pre-calibrated, therefore, the operator can immediately begin to weigh
items in normal operation.
A 5,000 pound weigh capacity scale will normally display "0" for no
weight and "5000" for the 5,000 pound maximum weigh load. This means
that when 180 pound fork is installed on the weigh module, the
Indicator will display "180" until the "ZERO" button is pressed. Then
the Indicator will display "0" with no load on the forks. The scale
will indicate the actual,weight on the forks from that point forward.
It should be obvious that a 5000 pound scale capacity with a pre-load
of 180 pounds of fork weight will have an actual maximum weighing
capacity of 4,820 pounds. (5,000 - 180)
Do not confuse the forklift lift capacity with the scale weighing
capacity. A 5,000 pound lift rated forklift with a 5,000 pound scale
capacity will not change. Only the regulated operating ratings will
the machine and scale configuration.
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 90 pounds each, so there is an additional de-rating
of fork truck lift capacity due to the weight of the scale modules.
Each track 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.
SEKO Forklift Class II modules, the truck lift capacity is
reduced by about 10 to 12%, making the maximum new lift rating of a
pound safe lift, reducing to 4,500 pounds (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, when discussing calibration, there are two calibrations to
SEKO Weigh Module is factory calibrated and only a ZERO
adjustment is necessary to complete calibration for your truck and
forks/attachments. However, the Control/Indicator selection and setup
will also 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
805-758-4446 any time.