KROHNE DWM 1000-2000 EN - Manual (Page 9)

DWM 2000 L - Installation
9
A. Installation on Flow Pipes
n The straight line flow distance required between the DWM and an ups-
tream flow disturbance (inlet, pump, elbow etc) is advised to be 10 x
DN and 5 x DN from downstream disturbances.
n Position the pipe saddle or the welding socket as indicated in the ins-
tallation sketch.
n Screw the ball valve onto the welding socket (or connection flange
according to the saddle design). The valve thread is 1''1/2.
n Ensure that the ball valve is closed.
n Screw the adjustable fitting onto the ball valve.
n Slide the DMW2000/L into the adjustable fitting to a depth of between
60 et 75mm. This assures that the mounting will be watertight.
n The security chain is supplied to the required length as determined for
each application. This length cannot be extended, but may be shorte-
ned where necessary.
n Loosen screw (No. 2 in sketch below) sligthly. This enables the
DWM2000/L to be inserted further without any leakage.
n Open the ball valve.
n Calculate the penetration length (= 1/8 DN Nominal Diameter) with a
tolerance of +2mm - 0mm.
n If flow is heavily perturbated or the internal diameter is uncertain, it is
advised to penetrate between 1/8 DN and 1/2 DN.
n Insert the DWM2000/L until measurement position is reached.
n Take off the housing cover and turn the entire probe so that the arrow
points in flow direction (this system differs from standard DWM
1000/2000).
n Tighten alternatively the two screws (No.3 in sketch) up to max 3N/m,
to seal off the fluid. Complete the installation by tightening screw
(No.2).
Adjustable
Fitting
Welding
Socket
Installation on pipe saddle
Preferred mounting angle: horizontal ±45°
Allen Sealing
Screws (3) Probe (1)
Adjustable
Fitting (4)
Side Screw (2)
Installation with welding socket
max. pressure 25 bar
B. Installation on Open Channels
n The DWM2000/L can be mounted by using the adjustable fitting.
n Position the device in such a way that the arrow points in the flow
direction.
Remarks
n The electronics block of this long version is interchangeable.
n For safety reasons, keep the security chain mounted, in
order to avoid any ejection in case of overpressure in
the pip e .
n For range settings and electrical connection, refer to DWM2000
standard version instructions.
Installation in an open channel