P
AGE
5
FIGURE 1.2
TURBINE DIMENSIONS
Section 2 - Introduction
2.1 DESCRIPTION
The HM is a volumetric turbine flowmeter. As liquid flows through the meter, it causes the rotor to spin. An
external non-contact pick-up probe counts each passing vane of the rotor as it spins. Each revolution of the
rotor equates to an exact volume of liquid. This digital signal may feed instrumentation such as controllers or
digital indicators. The sealed probe and stainless construction meet the demands of damp or wet applications,
and may be directly washed down during normal cleanup. Units are shipped pre-calibrated from the factory
with a pulse per gallon value identified on the body.
Section 3 - Installation
3.1 LOCATION
The HM turbine series flowmeter provides accurate measuring results when installed in either a vertical or
horizontal pipe section. Select a location where the meter body will be completely filled with product (see
figure 3.2). There must be a rise of pipeline elevation from the outlet side of the meter. Avoid the presence of
air, either bulk or entrained, from entering the product as it passes through the flow tube.
In a vertical pipe section, install the meter body in the upward direction of flow. In a horizontal pipe section,
install the meter body at the lowest possible point of the piping system.
Be sure the arrow on the body of the meter points in the direction of flow.
Install the meter with a minimum of 10 pipe diameters of straight tubing upstream and 5 pipe diameters of
straight tubing downstream. Under normal conditions the meter should be installed in a positive pressure
location.
When installing the transducer in the meter body, hand tighten the transducer until it bottoms out.
DO NOT
USE A WRENCH
, as you may damage the transducer. Secure the position of the transducer with the hex jam
nut.
FIGURE 3.2 INSTALLATION
Guidelines
Installation Illustrations
A
Install in a horizontal pipe section
at a low point before a rising
pipeline to ensure meter body
remains full.
B
Install in a vertical pipe section
with an upward direction of flow to
ensure meter body remains full.
C
Do not install in a horizontal pipe
section located at the highest point
of pipeline. This location allows
air to accumulate in the flow tube
which causes measuring errors.
D
Do not install in a vertical pipe sec-
tion with a downward direction of
flow. This location allows air to ac
-
cumulate in the meter body which
causes measuring errors.
A
B
C
D
10 x PIPE
DIAMETER
MINIMUM
5 x PIPE
DIAMETER
MINIMUM
5 x PIPE
DIAMETER
MINIMUM
10 x PIPE
DIAMETER
MINIMUM
