Nivus osm-f, Инструкция по эксплуатации

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Instruction Manual
OCM F
Page 74 OCM F - Rev. 04 as of 18.02.2014
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1 h-critical
2 h_crit min
3 Range of automatic Q/h relation
4 determination of application coefficient
Fig. 9-68 Flow velocity determination graph
Auto discharge curve Depending on the selected setting, entered values are verified and corrected if
necessary with the next measuring event (automatic >active<). Another option
is to permanently operate using the values entered in "Manning Strickler“,
"manual“ or "Assistant“ (automatic >inactive<).
Fig. 9-69 Defining v-crit
Note
Please avoid backwater up to levels of 0.012 m if Auto discharge curve is „ac-
tive".
v-crit Determination
This menu is conceived to be used for commissioning at low filling levels lower
than 6.5 cm. There are three options to determine the flow velocity:
− Manning-Strickler (if slope and roughness are known)
− Manual (if a reference value can be determined)
− Assistant (if a minimum dam-up of 6.5 cm is possible)