Sartorius combics 1 Operating Instructions Manual page 23

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
instrument.
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 average piece weight stored will
be more accurate and the results more
reproducible, 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 sample quantity
is stored
Reference Sample Updating
In the Application settings under 3.12,
you can define whether the reference
sample is updated automatically.
Reference sample updating is performed
automatically only when the following
6 criteria are met:
1. Menu item 3.12.3 is active
2. The current piece exceeds the original
piece count by at least two
3. The current piece count is less
than twice the original piece count
(does not apply for the first update
if the piece count is entered using
a bar code scanner).
n n + 2
Range for reference
sample updating
"Old" ref.
sample qty.
4. The current piece count is less
than 100.
5. The internally calculated piece count
(such as 17.24 pcs) differs by less
than ± 0.3 pcs from the whole number
(17 pcs in this example).
6. The weighing instrument is stable in
accordance with the defined stability
parameter.
When automatic reference sample
updating is active, the AUTO symbol is
displayed in addition to the Counting
symbol (Z). When the reference
sample has been updated, OPT is dis-
played below AUTO . During an up-
dating operation, 0pt and the updated
piece count are displayed briefly in
the main display.
At the conclusion of reference sample
updating, a beep is sounded and
the new reference weight and reference
sample quantity are stored. Activate
the "Info" mode to view the reference
values (press and hold w > 2 sec).
Counting with
Two Weighing Instruments
You can use two weighing instruments
simultaneously with the Counting appli-
cation. When using two instruments,
you can choose from the following
operating modes:
– Counting with two equivalent weighing
instruments
– Counting with one reference weighing
instrument and one counting platform
Counting with Two Equivalent
Weighing Instruments
Use this mode when samples of widely
varying weight are counted at one
2 · n
workstation. Count the lighter-weight
pieces on one weighing instrument
and the heavier pieces on another.
When you press n to toggle from one
weighing instrument to the other, the
application is re-initialized.
Pieces on
You can define which of the two
platform
weighing 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 Counting application.
Counting with One Reference Weighing
Instrument and One Counting Platform
In this mode, a high-resolution weighing
instrument with a relatively low maxi-
mum capacity is used as a reference
weighing instrument. The weighing
platform is used for weighing heavier
samples, and has a high capacity with
a relatively low resolution.
This way, you can both determine the
reference sample quantity very precisely
and count large amounts of parts,
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
automatically to the reference weighing
instrument for initialization (Ref
is displayed). Following initialization,
the system toggles to the counting
platform.
The system does not toggle auto-
matically for automatic reference
sample updating; the update is based
on whichever instrument is active.
23