Maintenance Groscale; Replacement And Repair - Priva Compass Installation Manual

Priva
Max #kg/5V
In this menu item the number of kilograms that correspond with 5000 mV is recorded. Max #kg/5V
must be derived from the saturated slab weight. The maximum nett weight to be weighed must
never exceed this value. The figure displayed here and under the menu Measurements, item Max
#kg/5V , must be entered on the accompanying form.

Maintenance Groscale

The various parts of the Groscale do not require a great deal of maintenance. In order to guarantee
reliable weighing, the following should be checked on a regular basis. Depending on the crop and
the situation within the company, this check should be performed either weekly or daily.
• Check that nothing has fallen onto the substrate slab (leaves, fruit, flowers).
• Check that no dirt or fruit has dropped underneath the support frame or into the weighing
platforms.
• Check that the plants are still properly supported by the braces.
• Check the reading (in kg) on the display of the weighing indicator.
• Prevent moisture from dripping onto the weighing indicator.
Remove the weighing platforms in the event of a change of crop. Cover the weighing indicator with
a plastic bag to protect it against moisture and cleaning materials, or remove the whole weighing
indicator. Cover the remaining plug with a plastic bag to protect it from moisture and cleaning
materials.

Replacement and repair

Weighing platform
To obtain the desired high level of accuracy a number of sensitivities have been determined for the
weighing platforms. The sensitivity has no bearing on quality, but is determined by the type of output
signal from the weighing platform. The weighing platforms of each weighing indicator should have
the same sensitivity. In case of a breakdown in one of the weighing platforms, it is important that
the repaired or replaced weighing platform has the same sensitivity. This sensitivity is marked on
the label of the load cell cable.
The same applies to the repair or acquisition of a second set of platforms for a weighing indicator.
After repair or after increasing the weighing platforms to four, the correct data should be entered
in the Load Cells menu after the load cell cables have been connected.
Weighing indicator
In the event of a weighing indicator breakdown, the procedure below should be followed:
1. Use the LEDs and the table in the chapter "Fault analysis" to check the voltage on the weighing
indicator and check which of the LEDs are working and which are not.
2. If the supply voltage to the weighing indicator is present but it still does not function, the weighing
indicator should be returned to your supplier. When returning the weighing indicator, please
make sure the following information is available:
• a thorough description of the failure
• remove the form containing the settings for the growing season in question from the weighing
indicator and keep it in a safe place so that the repaired weighing indicator can be set up
for the existing situation.
3. When the weighing indicator is returned, the values of the Tare Weight, Saturated Slab and Max
#kg/5V can be taken from the form you have saved and entered in the menu Service. Here, the
specific figures of the load cells in the Load Cells menu can also be entered, as explained in the
chapter "Commissioning".
116 Installing Priva Compass - 00.014