Operating instructions

Checkweighing O
When the Checkweighing application is
selected, you can check whether sample
weights correspond to a given target
weight or lie within a given tolerance
range. The tolerance range is defined as
either an absolute value or a percentage
with upper and lower limits. The result
is displayed in the main indicator, in the
bar graph and by a color-coded LED.
Features:
– When switched on, the application
starts automatically with the previous
initialization data
– The target value can be taken over
as a weighed value from a weighing
platform or scale and the tolerance lim-
its selected from a predefined list (0.1%,
0.2%, 0.5%, 1%, 1.5%, 2%,
3%, 5%, 10%) as a deviation from the
target value in percent.
– The target value, the lower tolerance
limit (minimum) and the upper toler-
ance limit (maximum) can be taken
over as weighed values from a
weighing platform or scale
– The input of the target value and
tolerance limits can be checked
by the application program i.e.
upper limit > target value > lower
limit > 1 digit
– Check range is either between 30%
and 170% of the target value, or 10%
to infinity
– Automatic taring
– Automatic printout
– Press the w key to toggle between the
weight display mode and the tolerance
limit display mode. The tolerance limit
display indicates “LL” (too low) or “HH”
(too high) for values outside the limits.
– Digital I/O interface
– Info mode displays the limits that have
been set
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Operating the Combics 2
Factory settings:
– Minimum load for automatic taring:
10 digits (3.5.4)
– Automatic taring (first weight tared):
off (3.7.1)
– When switched on, the application
starts automatically with the previous
initialization data: manual (off) (3.8.2)
– Checkweighing range: 30% to 170%
(4.2.1)
– Switch control line “SET” to:
Output “SET” (4.3.1)
– Control lines: Switch to checkweighing
range (4.4.4)
– Parameter input: Target value only
with limits in percent (4.5.2)
– Automatic printout: off (4.6.1)
To use the checkweighing function,
you must first enter a target value. The
current value on the weighing platform
is compared to this value. The target
value also has a tolerance range which
can be entered either as an absolute
value or percentage; see Settings (4.5):
– Entering the tolerance range as an
absolute value (weight value):
Start initialization by pressing O,
the middle segments of the bar graph
flash. Enter the target value and store
by pressing O.
When the bar graph segment for the
lower limit flashes, enter the weight
for the lower limit and store by
pressing O.
When the bar graph segment for the
upper limit flashes, enter the weight
for the upper limit and store by
pressing O.
– Entering the tolerance range in percent:
A percentage for the limit appears in
the numeric indicator and the percent
sign is additionally displayed. You can
change this value by pressing r
(0.1%, 0.2%, 0.5%, 1%, 1.5%, 2%, 3%,
5%, 10%). Store the desired value by
pressing O.
While entering the target value, the
percentage can still be changed by
pressing r. The middle bar graph
segments flash. Enter the target value
and store by pressing O.
Minimum Load
The minimum load at initialization is
set in the application setup program
(3.5 Minimum load for automatic taring
and automatic printout). You can
choose from the following 10 accuracy
levels:
1 digit (no minimum capacity)
2 digits
5 digits
10 digits
20 digits
50 digits
100 digits
200 digits
500 digits
1000 digits
The “digits" here refer to the scale inter-
vals of the connected weighing platform.
If the interval of the connected platform
is 1 g, and 1000 digits are required, you
must place at least 1000 g (= 1000 scale
intervals) on the weighing platform for
initialization.
If the interval of the connected weigh-
ing platform is 5 g, you have to place
at least 5000 g on the platform for ini-
tialization to achieve the number of
digits required in the above example.