CHAPTER 4
63
C H A P T E R 4 . 0
V600 CALIBRATION
Calibration is fine tuning a system to maximum accuracy in reference to a specific certified platform
scale. It is important to calibrate the scales for high accuracy to achieve the maximum hauling
payload. Calibration consists of setting the appropriate
Tare
weight and
Calibration
number for each
channel.
It is important that conditions remain as constant as possible throughout the calibration process.
Inaccuracies may result from differences in fuel load, ice or mud build-up, number of people in the
vehicle, etc. It may take 2 or 3 attempts at calibration to achieve the optimum setting.
Calibration should be done anytime a system is installed, if there are continuous questionable readings,
or if meter readings repeatably do not closely match the certified platform scale weights.
4.1 WEIGHT
MEASURING
METHODS
The Vulcan Scale System can be used to measure weight by two different methods. These methods
are Gross Vehicle weight and Net Payload weight. In addition to these methods, Vulcan Scales can be
used to determine Axle Weight on certain on-board scale configurations.
Important Notice for Front Loader Refuse Truck Operators using load cells to support the
body:
To avoid weight measurement errors, the forks must be in the down position and the body lift cylinder
pressure must be relieved at the time of measuring for all methods. The pressure relief valve should
be engaged during weight measurements. If the truck is not equipped with a pressure relief valve,
relieve the pressure manually. In addition, all packing should be done after the weight is recorded.
AXLE WEIGHT
Vulcan Scales can be used to reduce overweight fines by measuring a vehicle’s axle weight. For some
vehicle configurations, such as many logging trucks and trailers, the channel weights will be the axle
group weight.
For other configurations, the channel weight may not be the actual axle group weights because some
of the load is being shared by other axles. For short log and refuse trucks, the scales can indicate a
weight on an axle group that should not be exceeded in order to keep the truck legal. Load the truck
close to the legal maximum according to a certified platform scale. The number displayed on the
channel of the meter corresponding to the axle group represents an approximate rear axle group weight
and may be used as a reference weight to avoid exceeding the legal limit. This reference weight may
be different from the weight shown on the certified platform scale display.
Note:
Channel “A” does
not represent the steering axle weight when fully loaded.
June 21, 2006
VULCAN ON-BOARD SCALES 1-800-237-0022
Doc. 44-10032-001 Rev. C
©
STRESS-TEK, INC. 2006
