Kobold DON-05, Operating Instructions Manual

Page: 7 / 48

DON-H
DON-H
01/0721
page 7
Flow Conditioning and installation location
Filter:
It is highly recommended to INSTALL a filter immediately before (prior to) the
meter. Filters are available and sold separately.
Recommended Filter:
DON-H05…DON-H15: < 75 µm particle size (200 mesh)
DON-H20: < 150 µm particle size (100 mesh)
Flow conditioning: Flow conditions are not required since the DON flowmeter
does not require any straight pipe runs before or after the flowmeter.
Location: The recommended installation would be before any flow control and/or
shut off valves, this installation prevents complete emptying of the meter. This
minimizes the risk of leakage and/or air entrapment which could result in damage
to the flowmeter or inaccurate initial readings.
A by-pass installation is recommended for process or safety critical meters.
Isolation valves enable the meter to be isolated from the system and serviced as
needed. System purging is also possible with a by-pass arrangement.
Accommodate all meter ratings and locate the meter on the discharge side of the
process pump.
For outdoor applications, be sure all electrical entries are sealed properly via the
proper glands, mounting, sealing or containment. For humid environments,
mount the instrument appropriately as to avoid condensation build up. Generally,
these installations have the conduit connection pointing downward as to drain any
condensate away from the electronics.
Liquid State: Liquid within the flowmeter must not freeze. If heat tracing is
necessary, please be sure to adhere to the temperature limits of the flow meter.
Ensure the liquid does not flash, do not exceed the max DP of the flowmeter.
Hydraulic shock: Surge dampeners or pressure relief valves must be installed if
hydraulic shock or pressure spikes are present. Highly pulsating flow can also
damage the DON flowmeter. Diaphragm pumps and specific application profiles
can cause high frequency pulsating flow.
P ulsati o n dampe ne rs are highly
recommended.