50
ZM400 Series Indicators Service Manual
6
ADMIN level menus
6.3.7 Filter
FiLtEr
Use this to filter out vibrations affecting the scale. Under this item you have
the following three parameters to set.
AVg
This stands for average. 10 is the default value.
conSt
This stands for constant. 1 is the default value.
t-hoLd
This stands for threshold. 100 is the default value. When
0
is
the threshold value, filtering is always on.
To find the best settings for your filter needs, follow steps
7
.
1.
Using the Threshold setting is only recommended if the items to be weighed are
similar in weight. If the item weights vary considerably then set the threshold
value to 0 and proceed to step 2.
To determine the threshold value first set
t-hoLd
to 0.0,
conSt
to 0, and
AVg
to
1.0. Return to weigh mode and, with a typical item on the scale, observe the
weight swings. Record the difference between the highest and lowest displayed
weight values. Add 30 to 50% to this value. This is a good starting value for the
t-hoLd
setting. Do not set your indicator to this value until told to in step
7
.
2.
Setting
AVg
to higher values increases the filtering effect.
To do this: Set
t-hoLd
to 0.0,
conSt
to 0, and
AVg
to 10. Check the stability of
the scale by exiting to normal weigh mode, remove all weight from the scale
and/or press
ZERO
and observe the Center of Zero annunciator. If it is on all
the time your scale is stable. If the Center of Zero light blinks, more filtering is
required. Go to step
3
.
3.
Repeat step
2
but increase
AVg
by 10.
Keep repeating steps
2
and
3
until the scale is stable or you’ve tried an
Average value up to 80. If the scale is still not stable go to step
4
.
Filter
T-hold
Avg
Const
Key in
value
1 thru 10
Key in
value
Default settings are:
AVG = 10
Const = 1
t-hold = 100 (factory default based on 5000 lb capacity)
These values will provide the best weight response for the majority of scale
installations. In adverse conditions, where wind, vibration or other conditions are
affecting the stability of the weight displayed, refer to the following instructions to
improve the performance of the indicator.
If you are using Ztools to configure your scale it will attempt to calculate
filtering based upon your capacity and division size used.
