Vishay G4, Technical Manual, Page: 90 / 200

Technical Manual
5-4
Taring
Taring means storing of a tare value and that the instrument switches over to display of
net weight. The net weight being the gross weight minus the tare value.
In the instrument two tare values can be stored, Auto tare and Preset tare.
‘Auto’ tare value is the actual gross weight, stored as tare value when the taring is
performed (see section ‘Weight Display).
‘Preset’ tare is a tare value that can be entered only if the instrument is set to use
Preset tare. The value of Preset tares, for any of the ‘configured’ scales, can be
entered in sub menu ‘Preset tare’ under the instrument Main menu. Preset tare for the
selected (shown) scale can be set in the sub menu ‘Pre.tare’ reached by as explained
in section ‘Weight display’.‘Preset tare’ can also be entered from a master unit by
communication.
Calibration parameter ’Tare Corr.Mode’ defines the use of ‘Auto’, ‘Preset’, or the sum
‘Auto+Preset’ by taring.
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Auto: Only ‘Auto tare’ is used. ‘Preset tare’ value can not be entered or edited.
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Preset: Only ‘Preset tare’ is used.
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Auto+Preset: The sum of the ‘Auto tare’ and ‘Preset tare’ values is used. By
taring the actual gross weight is stored as Auto tare value and the instrument will
display net weight = ‘– Preset tare’.
With default setting, taring can be performed, even if the weight is not stable. But if
parameter ‘Motion check’ in ‘Parameter Set-up/Calibration’ for the scale is set to ‘On’,
taring will be allowed only when the weight value is stable.
If Calibration parameter ‘Overload Check’ is set to Unipolar, taring is not allowed at
negative gross weight.
Taring example:
A combination of Preset tare and Auto tare is useful in weighing operations when
it is inconvenient or impossible to separate a packing and its contents.
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The packing must be weighed to establish a ‘known weight’ for it.
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Go to menu ‘Calibration/Scale 1’ for the actual scale (in this example scale 1)
and set parameter ‘Tare Corr.Mode’ to Auto+Preset. Save the new setting.
•
Go to menu ‘Preset tare’ as explained in section ‘Weight display’. Enter the
packing weight as the Preset tare value.
•
Perform taring (see section ‘Weight Display) when the scale is not loaded, or
loaded with permanent help equipment only. The Preset tare value will be
displayed as negative net weight.
•
Put the packing with contents on the scale.
The weight of the contents will be displayed as net weight.