Description of the signal inputs/outputs
34
Set range of readings
This menu is for matching the current range to an end value.
Measuring values in the selected range can be represented by a
corresponding current. For all values that are larger than the upper
measuring value 20mA is generated.
Example:
0mA (4mA) matches 0 mg/l
20mA matches 200 mg/l
In
, select =>
=>
Select one of the current interfaces and press
“ENTER” to confirm
the selection.
The menu “
” is displayed.
Select the desired range.
Press "ENTER" to confirm the selection.
Calculation of output currents
The entire current range (0
– 20 mA or 4 – 20 mA) is available for
one measuring point. However, the current range is divided for two
measuring points. The value from measuring point 1 is displayed in
the lower half (0
– 10 mA or 4 – 12 mA) and the value for measuring
point 2 in the upper half (10
– 20 mA or 12 – 20 mA).
Measured value
Current =
x 20 mA
Maximum value
Measured value
Current =
x 16 mA + 4 mA
Maximum value
Measured value 1
Current 1 =
x 10 mA
Maximum value
Measured value 2
Current 2 =
x 10 mA + 10 mA
Maximum value
Measured value 1
Current 1 =
x 8 mA + 4 mA
Maximum value
Measured value 2
Current 2 =
x 8 mA + 12 mA
Maximum value
The current is set to 20 mA.
Measured value = The value shown on the display in the selected
unit
Maximum value = End
value set under „
(e.g. 200 mg/l)
1 measuring point
0 - 20 mA
1 measuring point
4 - 20 mA
2 measuring points
0 - 20 mA
2 measuring points
4 - 20 mA
Measuring range
exceeded (e.g. >50 mg/l
How is the current
calculated for a
specific measured
value?
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