Hofmann Compact CO5000 Bedienungsanleitung Seite 14

3. Start weighing
Verify the reading is "0". If not, press [ZERO] to display "0".
Place objects in the weighing container to weigh.
The weighing value is displayed.
Counting procedures
1. Press [I/O] to turn on the scale.
When power is turned on, all display segments appear on LCD for a
few seconds and finally "0" will appear on the display.
2. Start counting
Verify the reading is"0",if not, press [ZERO] key to display "0".
Place the certain numbers of sample in the container (numbers of
sample=10, 20, 50 or 100)，total weight is displayed.
Press[MODE] key to select the counting mode.(e.g. count)
Set the certain numbers of sample thought press [REFERENCE]
key (the certain numbers of sample=10, 20, 50 or 100), then press
[MODE] key, the display will show "CAL", after 1 second, set the
certain numbers of sample are displayed.
Place the unknown numbers of sample in the container, the total
number is displayed.
3. Return to weighing mode
Press[MODE] key, the scale return to the weighing mode.
NOTE: the weight of unit sample > 10e.
CALIBRATION
When to calibrate
Calibration may be required when it is initially installed, if the
scale is moved to a substantial distance.
This is necessary because the weight of a mass in one location is
not necessarily the same in another location. Also, with time and
use, mechanical deviations may occur.