HBM WE2108 Series, Справочное руководство

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WE2108
HBM A1632-2.0 en
Example:
Parallel connection of 4 load cells of 20 t, sensitivity 2 mV/V.
Nominal load of the scale 60 t, 6000 divisions, resolution step 0,01 t.
1. Setting the scale parameters in the Func menu:
•
Display unit (tonnes): ”unit” = 3
•
Places after the decimal point: ”Point” = 2
•
One−range scale: ”tYPE” = 1
•
Resolution step: ”RES1” = 1
•
Scale nominal load 60 t: ”CAP 1” = 60.00
2. Calibration of the user characteristic in the CAL menu:
•
Perform zero point calibration.
•
A nominal value of 4 x 20 t = 80 t (at 2mV/V) results
from the parallel connection.
Signal span
+
2 mV
ń
V
@
60 t
4
@
20 t
+
1.5 mV
ń
V
•
Read off dead load signal in the menu (”CAL−0” parameter)
Example: ”CAL−0” = 0.3000 = 0.3 m V/V
Then exit the menu item with
CE , since otherwise there is a new
measurement!
•
Signal at nominal load = Signal span + dead load signal
= [1.5 mV/V] + [0.3 mV/V]
= 1.8 mV/V
•
Therefore enter 1.8000 under ”CAL−1”
6.5 Influence of the geographical installation site
The function described below enables calibration at the scale manufacturer,
even if the unit should be operated in another geographical position (height
above sea level, latitude).
This setting is not required for calibration on site!
The acceleration due to gravity and thus the display of the scale depends
upon the geographical data (latitude and height above sea level) of the instal-
lation site. The change between different regions is a maximum of 0.1 %
within Germany, 0.6 % worldwide.
If this error influence at the new installation site exceeds the accuracy limits of
the scale, a recalibration is required as a rule. Instead of this, the influence of
the installation site can be compensated for by an internal correction function
of the WE2108.