Ravas RPW ST User manual

1
OPERATION MANUAL RPW ST
INDEX page
The weighing system for the stacker
1. Taking the system into operation 2
2. Use 2
3. Maintenance 3
Rev.19.10.07.2

2
THE WEIGHING SYSTEM FOR THE STACKER
1. TAKING THE SYSTEM INTO OPERATION
To activate the weighing system, turn it on using the on/off () button on the
terminal.
After 3 to 5 minutes the electronics and load cells have reached the operational
temperature. Before this, inaccuracies of up to ca. 0.3% may occur.
It is recommended not to lift loads before the zero-point correction has been
executed.
2. USE
The indicator’s power is supplied by the truck’s battery. When the voltage of the
battery becomes too low, a message will be shown and the indicator switches off
automatically.
The weight must be lifted freely: the weight may not touch parts of the mast or other
pallets:
Wrong way of lifting the load
Correct way of lifting the load
The accuracy of the weighing system diminishes with circa 0.1% per degree starting
from a tilted position of 2°. This effect also occurs with pits/potholes in the floor. An
even floor is optimal.
The most accurate weighing result is obtained when the centre of gravity of the load
is placed between the forks. With a non-centric loading, the forks will tordate and
bend. This may result in a higher inaccuracy. With legal for trade versions, the level
control will switch off the indicator with a non-centric loading or a tilted position that
influences the weighing accuracy.

3
Non-optimal placement of the load
Optimal placement of the load
Temperature range: between -10 and +40°C the maximum inaccuracy is 0.1% of the
weighed load. Outside this range inaccuracies up to 0.3% may occur.
Fast temperature changes must be avoided because it can cause condensation in
the electronics. During acclimatisation the weighing system must be switched off.
3. MAINTENANCE
From time to time, every weighing system has to be calibrated. Yearly maintenance
of the weighing system is recommended. We strongly recommend that approved
weighing systems should be calibrated yearly, by a certified institution.
Maintenance guidelines for a standard stacker also apply to the mechanical parts of
the mobile weighing system. From experience we know that the integrated weighing
system still functions when the mechanical parts are damaged by overloading.
Main guidelines:
- The electronics may only be cleansed with a moist cloth. Chemical cleansers and
high pressure cleansing will cause damage.
- Gathering dust between the parts of the system can negatively influence the
accuracy. Therefore, the system should be checked and cleaned regularly. Do not
use high pressure cleansing.
- Only specialists may undertake any welding. This is to avoid damage to
electronics and load cells.