Sartorius combics 1 Operating Instructions Manual page 41

Storage Parameter
The reference weight is saved when
the weighing instrument has stabilized.
"Stability" is defined as the point at
which fluctuation of a measured value
lies within a defined tolerance range.
The narrower the tolerance range, the
more stable the weighing instrument
is at stability. This setting is also applied
when you zero the weighing instru-
ment.
Under menu item 3.11 you can
determine whether the value is saved
"At stability" (normal tolerance range)
or "At increased stability" (narrower
tolerance range).
If you select "At increased stability,"
the reference weight stored will be more
accurate and the results more repro-
ducible, but the response time of the
weighing instrument might be longer.
Minimum Load for Initialization
The minimum load for initialization
is configured under menu item 3.6.
If the load exceeds this limit, the
weighing instrument can be initialized.
If the load is too light, the following
will occur when you try to save a value:
– The error code inf 29 is displayed
– A warning signal is emitted
(double-beep)
– The weighing instrument is not
initialized
– The preset reference percentage is
stored
Weighing in Percent with
Two Weighing Instruments
You can use two weighing instruments
simultaneously with the Weighing in
Percent application. When using two
instruments, you can choose from
the following operating modes:
– Weighing in Percent with two equiva-
lent weighing instruments
– Weighing in Percent with one reference
weighing instrument and one weighing
platform
Weighing in Percent with Two Equiva-
lent Weighing Instruments
Use this mode when samples of
widely varying weight are measured at
one workstation. Measure the lighter-
weight pieces on one weighing instru-
ment and the heavier pieces on another.
When you press n to toggle from
one weighing instrument to the other,
the application is re-initialized.
You can define which of the two weigh-
ing instruments is active in the display
when the Combics is switched on (menu
item 8.11). This is the first weighing
instrument active when you switch on
the Combics, regardless of the setting
for automatic initialization of the
Weighing in Percent application.
Weighing in Percent with
One Reference Weighing Instrument
and One Weighing Platform
In this mode, a high resolution weigh-
ing instrument with a relatively low
maximum capacity is used as a refer-
ence weighing instrument. The
measuring platform has a high capacity,
but a relatively low resolution.
This allows you to both determine the
reference value with high resolution;
i.e., very precisely, and to measure large
samples, without requiring an expensive
high-resolution, high-capacity weighing
platform.
Specify which weighing instrument
is the reference instrument under menu
item 3.13. The system toggles automat-
ically to the reference instrument for
initialization (Ref is shown in the main
display). Following initialization, the
system toggles to the measuring plat-
form.
Display
With the Weighing in Percent application,
the result can be displayed as a remainder
or loss. This is configured in Setup under
menu item 3.15.
Equations:
Residue= Current weight/
100% weight* 100
Loss= (Current weight –
100% weight) /
100% weight * 100
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