PR 5211 Instrument Manual ProfiBus Interface
Sartorius EN-73
6.3.2 Calibration
6.3.2.1 Procedure
To change the calibration-data and calibration-parameters (parameters 21...53), P20 has to be set to Start
previously, afterwards the P20 has to be set to Save (to store) or Undo (to indicate that the changes are not
valid).
The access to parameter 21…53 will deliver an error message, if CalActiv is not set.
P21 - P24 and P27 can only written. Reading will result in an error code108.
The calibration data (parameters 21...27) must be written in a specific sequence.
The calibration parameter (parameters 40...53) can be written in any sequence.
1. Example for a new calibration with mV/V:
• Parameter 20 = 1
• All parameter writing (P40 .. P53)
• Parameter 20 = 5 set SPAN = 1.000000 mV/V, deadload = 0.000000 mV/V, FSD=3000kg,
step = 1
• Parameter 21 = 0x000FA013 400.0 kg
• Parameter 22 = 2 2 stepwidth
• Parameter 25 = 5670 0.00567 mV/V
• Parameter 26 = 1234500 1.23450 mV/V
• Parameter 20 = 3 save and exit calibration
After each step, the error has to be tested under each circumstances.
2. Example for a new Calibration with Weights:
• Parameter 20 = 1
• All parameter writing (P40 .. P53)
• Parameter 20 = 5 set SPAN = 1.000000 mV/V, deadload = 0.000000 mV/V, FSD=3000kg,
step = 1
• Parameter 21 = 0x000FA013 400.0 kg
• Parameter 22 = 2 2 stepwidth
unload the scale
• Parameter 23 = 1 the actual weight is taken for the deadload
load the scale with a known calibration weight (e.g. 250.0 kg)
• Parameter 24 = 2500 250.0 kg
• Parameter 20 = 3 save and exit calibration
After each step, the error has to be tested under each circumstances.
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