BLN nobel G5, Technical Manual

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G5 Weighing Instrument
5-5
Gross/Net operation
At normal operation the G5 instrument presents a numerical weight value at the
display, either gross weight or net weight. When net weight is displayed the text
‘Net’ is shown on screen.
Toggling between display of gross weight and net weight can be performed by
pressing the GROSS/NET key. Gross weight is continuously shown in form of a
graphic bar on the scale display. Maximum length of the bar corresponds to the set
Capacity of the scale.
Net weight is the difference between gross weight and a tare value. For calculation
of net weight, the instrument can use either ‘Preset’ tare, ‘Auto’ tare, or the sum of
them. Net weight cannot be displayed if the tare value in use is zero (0).
Zero setting
A basic zero setting of the gross weight is performed as part of the calibration for the
scale. If changes to the weighing equipment are made later a renewed calibration, or at
least the zero setting of a calibration, should be performed.
Minor correction of the zero value may be needed and can rapidly be performed:
When a gross weight close to zero is displayed, pressing the ZERO key
will make the gross weight zero.
Pressing the ZERO key will also set the value of ‘Auto tare’ to zero.
Zero setting with the ZERO key is permitted only if:
•
The weight is stable (the text ‘Motion’ not shown), and
•
The accumulated zero correction since last calibration is between -1 % and +3 %
of the ‘Capacity’, over and above the zero offset obtained when the instrument
was calibrated last time.
The text ‘Zero’ will be shown on the display when the displayed weight is a ’good zero’,
meaning that the weight deviates from zero with less than one quarter of the set
‘Resolution’.
Zero value
Unloaded transducers.
Actual transducer load.
Tare value: auto,
fixed or auto + fixed
Net weight
Gross weight
Range for zero adjustment
and zero-tracking.
Empty scale - loaded with
permanent equipment only.
Installation setting.
Correlation between gross weight, net weight,
and tare value for a scale.