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4. KEYBOARD
Key ON/OFF is to turn display off. Others subassemblies are still
suppplying and scale is in stage of waiting for further work. If user
press this once again weighing stage with measure units are
displayed.
PRINT key is to send current state of display to external mechanism
by connector RS 232
CAL key is to calibrate. It’s manual calibration. After press if scale
starts calibration. There shouldn’t be any load on scale. If you press
TARE during calibration calibration stops and weighing returns
F is function key. It’s to choose measure unit (in which measurement
is done) or to change some functions in user menu
TARE key is to sett indication to zero. After setting to zero indication
is zero. If load is taken off scale display show its mass with “minus”
sign. Setting to zero can be done in all measure range of scale
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