IM-P402-93 AB Issue 7
30
Note:
If the 4 - 20 mA is selected, to drive a valve / positioner, the controller will output
20 mA when the water level is at the bottom of the control band, and 4 mA at the top.
If an inverse output is required, e.g. for a reverse acting valve, select 'pumping out'.
Section 8.3, Pump action.
Note:
If the 4 - 20 mA output is not used to drive the valve, the output will represent level with
the following limits:-
Minimum level (page 25) = 4 mA (0%)
Maximum level (page 26) = 20 mA (100%)
To page 29
From water meter selection
on page 32
8.14 Valve drive / 4 - 20 mA retransmission
Select either 'Relay' or '4 - 20 mA' to suit the type of drive required:-
To water meter selection
on page 32
From page 29
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