PR 5610 Installation Manual Commissioning with Terminal
Sartorius 131
3. The following command line is displayed in the mask:
Unload/ Load
Calibration by weight
Unload and hit O or S to skip,
E to end, X to set fixed span, P to print
The system offers the following replies:
Unload and hit 0
unload scale, set the zero
Load and hit Return
load the scale, set the span
E to End
finish calibration
X to set fixed span
set the fixed span
P to print
print out the calibration parameters
4. Set only the zero = finish calibration
E to End
Press key [E]
Calculating test …
system calculates the test value
Calculating test … Status OK
Now, the following command line is displayed:
Keys
Select item with cursor up/down/left/right Change with +/-
Return to FiXed, Set Fullscale, Calibrate by Weight or Millivolts
E Exit calibration
Subsequent deadload correction is finished. The data must be saved: proceed as described in points 9. and 10. of
the 'Weighing point calibration procedure'.
5.6.7 Weighing point calibration without weights
If the scale to be calibrated is not subject to the calibration law and if calibration with weights is not possible or
not required for reasons of accuracy, weighing point calibration without weights is possible.
As a prerequisite, however, the load cell sensitivity (if possible, the sensitivity of each load cell) must be known.
This information can be used to calculate the span.
• Calculation of the load cell sensitivity
If the sensitivity C and the output resistance Ra of the individual load cells 1 to n are different, the mean load
cell sensitivity C
Avr is calculated as follows:
Ran
1
+ ... +
Ra2
1
+
Ra1
1
Ran
Cn
+ ... +
Ra2
C2
+
Ra1
C1
Avr
= C
The formula is simplified, if the output resistance Ra is almost equal for all load cells:
CAvr =
1
n
C
∑
Span: Calculation of equivalent input voltage in mV/V
The span indicates the equivalent input voltage in mV/V related to the full scale. It is calculated as follows:
cells) load of no. * load (nominalcapacity cell load
[mV/V]CAvr y sensitivit cell load * scale full
= [mV/V]span
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