Siemens 200 Rake Screen Control MR, Setting a Rake Control, Point Three Level Distance = h1 -h2

Rake (Screen) Control [MR 200]

This feature is only available on the MultiRanger 200.

Screens or rakes are mounted on the inflow channel of the wastewater treatment plant to prevent debris from clogging the equipment.

When material builds up on the screen, a level differential is created, and the water level is higher in front of the screen than behind it. When this differential reaches the programmed setpoint, the MultiRanger activates a relay to operate mechanical rakes that clean the screen and ensure a steady flow.

Setting a Rake Control

	Transducer
Transducer	Two
One	Rake

P007 (3)

Max differential between Point 1 and Point 2 reading also sets 100% scale for bargraph and mA output.

Transducer[1]			Note: transducers may be mounted at variant heights.
P006[1]		Debris Conveyer		Transducer[2]
				P006[2]
	P007[1]				P007[2]
	h[1]				Flow
	Rake
			Water Level	h[2]
Point Three: Level Distance = h[1] –h[2]
7ML19981FB06	MultiRanger 100/200 – INSTRUCTION MANUAL				Page 69

Rake (Screen) Control

MR 200