Rice Lake CLS-420 Cargo Lift Scale Installation Manual - Manual (Page 7)

CLS-420 Installation Manual 3
1.2 Considerations Before Installation
While the CLS-420 Cargo Lift Scale will fit most typical forklifts, there are certain considerations that must be
taken into account prior to installing the scale. Due to the extra weight of the CLS-420, the net lifting capacity of
the forklift scale is decreased by approximately 10%. Use the formula below to calculate the net capacity of the
unit.
Note
Formulas can give you a good estimate of how capacity will be affected. You should work closely with your
forklift manufacturer before making a decision. Their data reflects, in most cases, testing with specific forklifts
and attachments.
Net Capacity = A(B + C) - D (E + F)
E + G + H
Where:
A = Truck basic capacity in pounds
B = Inches from the front wheel center line to fork face
C = Inches from the fork face to the truck rating point (usually 24")
D = Weight of the scale in pounds (428 lbs)
E = Inches from the front wheel center line to the carriage face
F = Inches from the carriage face to scale Horizontal Center of Gravity (HCG)
G = J + K (inches from the carriage face to the rear fact of load)
H = Inches from fork face to new truck rating point
J = Thickness of fork
K = Thickness of scale
CAUTION
Another consideration is the indicator power source will be connected directly to the battery of the
forklift. Most typical is 12 volts for propane, gas and diesel forklifts. However, some diesel forklifts are 24
volts.
12 and 48 volt systems must have a negative ground so ensure the forklift has a negative ground
electrical system. The CLS Series Cargo Lift Scale will not operate on a positive ground forklift. Refer to
the forklift users manual to further verify grounding requirements.
1.2.1 CLS Classes and ID Plates
During the initial sale and installation of the CLS-420, you need to remind your customer that they must have an ID
plate on their forklift updated stating the new lifting capacity and center of gravity information. This requirement is
per OSHA rules and regulations.