Commissioning; Commissioning 8020 Standard; Examination Of Fitting Orifice; Flow Rate Determination - Burkert 8020 Notice D'utilisation

4 COMMISSIONING

4.2 Commissioning 8020 standard

4.1.1 Examination of fitting orifice

The size, as well as the ideal flow rate in
[m/s] or [ft/s] to determine the flow volume
can be defined with the nomogram (see
appendix). The general flow rate lies at 2.5
m/s (8.2 ft/s). The orifice must be adapted
accordingly.
For applications, with significantly
!
varying flow rates, it is important to
keep the flow rate within the permissible
limits. (< 10 m/s)
8020
FLOW SENSOR TYPE 8020

4.1.2 Flow rate determination

The sensor measures the flow volume via
the frequency, which is proportional to the
flow, generated by the paddle wheel.
The flow quantity Q in [l/min] or [US gal/min]
is specified by the following parameters:
f = operating frequency in [Hz]
K = specific fitting factor in [pulse/l],
or [pulse/US gal]
Flow quantity
Example: Fitting DN 25
Pipe material PVC
Frequency: 108 Hz
The following applies for the example:
K = 56,59 pulse/l
(see Instruction manual fitting type S020)
The flow Q is thus calculated:
Q =60 x f = 60 x 108
K
Q= =114 l/min
E-13-
Q = 60xf
K
56,59