The "relays/controls" menu
94
5.3 The "pump control N" submenu - enhanced
(N = 1 or 2)
!
Note!
Depending on the order code of the instrument, different functionalities can be configured for the
pump control. The order code of the instrument can be found on the nameplate and in the operating
menu at "system information/device information".
This chapter is only valid for instruments with enhanced pump control
(FMU90-*3********** and FMU90-*4**********).
For the standard pump control see chapter 5.2
(FMU90-*1********** and FMU90-*2**********).
!
Note!
The "pump control N" submenus are only present if "pump control" has been selected in "device
properties/operating parameters/controls".
5.3.1 Basic principles
The pump control is used to start or stop pumps depending on the measured level. Up to two pump
controls can be defined. One or more pumps can be allocated to each pump control. The pumps are
switched on and off by the relays of the Prosonic S.
The switching behavior depends on:
• the selected "function"
• the selected type of "load control" (only relevant for alternating pump control)
Functions "limit simple" and "limit parallel"
For these functions, a switch-on point and a switch-off point is defined for each pump. The
switching behaviour depends on the relative position of these two switching points:
a. Switch-on point > Switch-off point ("Emptying")
The pump is switched on if the level rises above the switch-on point (A). It is switched off if
the level drops below the switch-off point (B).
b. Switch-on point < Switch-off point ("Filling")
The pump is switched on if the level drops below the switch-on point (A). It is switched off if
the level rises above the switch-off point (B).
L00-FMU90xxx-19-00-00-yy-052
1: "Emptying" (switch-on point > switch-off point); 2: "Filling" (switch-on point < switch-off point)
A: switch-on point; B: switch-off point; C: pump on; D: pump off
L
A
B
t
t
C
D
L
A
B
t
t
C
D
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