3. Operating method
3.1 Prior to the use of the electronic weighing apparatus that has been just purchased or
laid idle for long time, power should be switched on for battery charging and leveling.
Tune-on the power switch and the weight display window displays “F----1” to
“F----9” and then “0” after holding for a period of time. Prior to the use, switch on the
power for 15 minutes of warming-up.
3.2 Tare
3.2.1
If the weight display deviates from the zero with nothing on the weighing
platform, press the “TARE” key to reset the weight display to zero.
3.2.2
If the weight of the article for which the packaging is to be removed is
unknown, place the packaging container on the weighing platform, wait till the
weight display is stable before pressing the “TARE” key. The zero is displayed
for the weight. Then place the article to be weighed in the container. Now, the
weight window displays the net weight of the article. When the article and its
container are removed, the weight display window displays the negative value
of the weight of the container. Nevertheless, press the “TARE” key so that zero
is displayed for the weight.
3.2.3 If the weight of the article for which the packaging is to be removed is known
(pre-tare), key-in the weight (in g) of the container by means of number keys,
then press the “TARE” key and the weight display window displays the net
weight of the article excluding the weight of the container. Remove the article
and container, the display window displays the negative value of the weight of
the container. Nevertheless, press the “TARE” key and the Packaging Removal
function is canceled and zero is displayed for the weight.
3.3 Calibration
When laid idle for long time or just purchased, the electronic weighing apparatus
should be subject to calibration. With nothing on the weighing platform, fully warm
up the electronic weighing apparatus (for 15 minutes or more) ,press and hold the
“CE” key followed by pressing the “UNIT W.T.” key and the weight display window
displays “C--XXX”. The unit weight display window displays “-CAL-” and it is in the
calibration state (XXX refers to the weight of the calibration required. For instance,
“10.000” means that standard weight of 10kg is desired.). Now, simply place the
calibration weight on the weighing platform, wait till stability is achieved and the
weight display window of the electronic counting weighing apparatus displays the
value of the weight. The indicator for the sign “kg” of stable weight lights, the unit
weight display window displays “0” and thus ends the calibration. Now, normal
weighing and counting is possible. Or when the unit weight display window displays
“-CAL-”, use the number keys to enter the weight value before calibration by placing
sufficient counter poise (the entered value of the weight should be between 1/3 of the
range and full range). In the calibration state, press the “TARE” key and you will
come out of the calibration state. When the weight display window displays “C----F”
during the calibration, it means that the zero is unstable. You may press the “TARE”
key for the weight display to reset before the calibration.