Installation Guide
Owner’s Operation Manual
Orientation When installing the flow meter, orientation must be considered.
The rotor shafts must be in a horizontal plane. To verify that the rotor shafts are in a horizontal plane, elec-
tronic cover or optional digital display will be facing in a horizontal direction. For modification in the field, the
electronic cover or digital display can be rotated in any 90 degree position. This accommodates access to
the electrical entry and allows the electronic display orientation to best suit the installation.
Flow Conditioning and Location
It is highly recommended to INSTALL a filter immediately before (prior to) the meter. Filters are available
and sold separately.
Recommended Filter:
OGM-DPS-25: < 75 µm particle size (200 mesh)
OGM-DPS-40: < 150 µm particle size (100 mesh)
OGM-DPS-50: < 350 µm particle size (45 mesh)
Flow conditioning: Flow conditions is not required since the DON flow meter does not require any straight
pipe runs before or after the flow meter.
Location: The recommended installation would be before of any flow control and/or shut off valves, this in-
stallation prevents complete emptying of the meter. This minimizes the risk of leakage and/or air entrap-
ment which could result in damage to the flow meter or inaccurate initial readings.
A by-pass installation is recommended for process or safety critical meters. Isolation valves enable the me-
ter 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 condensa-
tion 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 flow meter 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 flow meter.
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 flow meter. Diaphragm pumps and
specific application profiles can cause high frequency pulsating flow. Proper pulsating dampers are highly
recommend
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