Priva Compass Installation Manual page 117

Slab calibration
In this menu, the data for the weighing unit including the substrate slabs is entered, usually at the
start of a new crop.
Set tare Weight
This function is used to record a new zero weight. Place the dry substrate slab on top of the weighing
unit and perform the Set tare Weight function.
Saturated Slab
This function is used to record the weight of the saturated slab in the weighing indicator, only to
backup your memory. The function Saturated Slab is used only after the function Set tare Weight has
been performed. Place the saturated slab on the weighing unit or drip moisture onto the dry slab
until this is saturated.
Adj. Nett Weight
Effect of using the function Adj. Nett Weight
With this menu the nett weight can be changed by shifting the current zero point. The current nett
weight is shown on the left of the display, while the new nett weight is displayed on the right. This
can be changed by using the arrow keys. This function can be performed after a change in weight
has occurred as a result of crop activity. When this function is to be performed, you should record
the nett weight showing on the display before the crop activity is performed. Also, no water dosage
should take place in the meantime. It is advisable to use this function as little as possible and instead,
change the nett weight by making a change to the hanging plant support system.
Test Outputs
By activating this menu, the process computer cabling can be checked. Both analog outputs will
transmit a reverse phase block-wave with a low relatively high signal of 0 mV and 5000 mV within a
time period of 30 seconds. This way, any short circuiting in the cabling or any loss of voltage in the
cabling can be spotted early.
Service
In this menu, data regarding the weighing unit can be entered directly, which means that the weighing
unit does not have to be calibrated again when the weighing indicator is replaced. The data should
be taken from the accompanying form.
Tare Weight
In this item, you need to enter the weight taken from the accompanying form which represents the
value of the item Tare Weight in the menu Measurements.
Saturated Slab
In this item, you should enter the weight taken from the accompanying form which represents the
value of the item Saturated Slab in the menu Measurements. With this data the Max #kg/5V can be
recorded.
Installing Priva Compass - 00.014
Groscale
115