BM 70 X Project Engineering Guidelines 01/2001 Page: 35
8.3 Parameter setting
At the least the following basic parameters must be known in order to be able to configure the BM 70
A/P, BM 702 measuring system:
•
Tank height (from tank fitting to tank bottom)
•
Maximum level likely to occur
•
Measuring range for 4 - 20 mA (4 mA = level 1; 20 mA = level 2)
•
Baud rate and address for digital interfaces
In order to suppress interference from fixed internals during the measuring mode, a so-called “empty-
tank spectrum“ normally needs to be recorded (except in the case of simple storage tanks). For this
purpose, it will be necessary, just once, to empty the tank completely. If an agitator is used, this must
be switched on during the recording of the empty-tank spectrum.
Other optional application parameters can be set for special operating conditions.
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