G4 Multi Channel Weighing Instrument. PM/DT/HE Technical Manual

Technical ManualGross/Net operationAt normal operation the G4 instrument presents a numerical weight value at thedisplay, 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 bypressing the GROSS/NET key. Note that toggling is done only for the selected scalein case of more than one scale displayed on screen the selected one is indicatedwith a yellow background on the display.Gross weight is continuously shown in form of a graphic bar on one and two scaledisplays. 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 calculationof net weight, the instrument can use either ‘Preset’ tare, ‘Auto’ tare, or the sum ofthem.Net weight cannot be displayed if the tare value in use is zero (0).Zero settingA basic zero setting of the gross weight is performed as part of the calibration for thescale. If changes to the weighing equipment are made later a renewed calibration, or atleast 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 keywill 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 offsetobtained 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’.Actual transducer load.Net weightGross weightEmpty scale - loaded withpermanent equipment only.Installation setting.Unloaded transducers.Tare value: auto,fixed or auto + fixedZero valueRange for zero adjustmentand zero-tracking.Correlation between gross weight, net weight,and tare value for a scale.5-6