Operating instructions

Differential Weighing and Backweighing
Differential Weighing and Backweighing Code 2 1 6
Symbol displayed: % S
The purpose of this application is to weigh a certain sample in original condition
and then after treatment, such as drying, to determine the difference between
the two weights and the remaining sample quantity. This is done either in percent
or in a weight unit.
For each sample, the net weights are compared with each other, since the tare
weights are stored first and later subtracted. Tare weighing can be
de-activated, if a container will not be used in the treatment process. There
are memory locations for a maximum of 50 samples.
Backweighing, which means weighing a sample after a chemical or thermal
reaction, can be done in any sequence (known as “random” backweighing).
It is also possible to perform several backweighing operations. In this case, each
backweighing operation is done in reference to the original sample
weight (= 100%).
Therefore, the usual sequence of the weighing operations is as follows: tare
weighing - weighing-in - backweighing. This sequence can be performed
according to the individual or combined weighing mode.
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Charging the Battery for Data Storage
It goes without saying that the data are stored in a battery-backed
memory. When the balance is unplugged from AC power, the
data generated will remain stored for approximately three months.
In the standby mode, the data are retained by the internal power
supply. The rechargeable battery can also become discharged
after relatively long periods of storage. In this case, or for initial startup,
leave the balance connected to AC power for about 12 hours to
charge the battery.
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