KROHNE BM 90 EN - Manual (Page 32)

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4.6. Open channel flowmeter (Pr.1 = 4)
with penstock control
The application : l As chapter 4.5. but additionally to control a penstock via Relays 1 and 2 to modulate flow
between 25 and 30 l/s
ENTER: Pr.1 - Pr.6 as example 5, then go to Pr.9
Pr.9 = 30 Defines top flow limit 30 litres per second.
Pr.10 = 25 Defines low flow limit 25 litres per second.
Pr.12 = 8 Duration of penstock drive pulse is 8 seconds.
Pr.13 = 4 Time between drive pulses is 4 seconds.
ENTER: Pr.14 - Pr.48 as example 5, then go to Pr.50.
Pr.50 = 2 To initiate penstock control.
ENTER: Pr.78 and Pr.98 as example 5.