Table of Contents
Advertisement
4. To ensure accurate measure-
ment, remove all air from the
system before use. To purge the
system of air:
a. Open the discharge valve or
nozzle and allow fluid to com-
pletely fill the system. Make
sure the stream is full and
steady and no air is present.
b. Close the discharge valve or
nozzle. Leave the system on.
c. Start normal operations. If nec-
essary, zero the Batch Total.
Using the Meter
The meter display is on continually
and always ready for use.
To determine the exact volume mea-
sured with each use, use the Batch
Total function. You can zero the Batch
Total before measuring and monitor
volume as it flows through the meter,
just like the gas pump at the service
station as you fill up your tank.
To zero the Batch Total, make sure
the meter is on. Hold down the
DISPLAY button for 3 seconds until
zeros appear. Release the button,
start the flow, and watch the volume
on the readout.
When display becomes dim, faded
or the low battery message appears
(see below), the batteries need to be
replaced. Reference the Computer
Maintenance Section for details.
LOWBAT
INSTALLATION
Review the Before Installation and
Quick Start Sections. Also consider
the following recommen dations, es-
pecially if you are installing your meter
in a piping system. These suggestions
will help maximize perform ance of
your meter.
The meter can be mounted either
vertically or horizontally. It should be
field calibrated in the same orientation
in which it is mounted.
Avoid installing the meter in electri-
cally "noisy" environments. If installed
within 6 inches (15.2 cm) of large mo-
tors, relays, vehicle ignition systems,
or transformers, the meter's accuracy
can be adversely affected.
To avoid pulsation or swirl, use the
following recommendations.
For Low Flow or one inch meters,
install with
– 20 inches (51 cm) of straight
pipe upstream and
– 5 inches (13 cm) of straight
pipe downstream.
For two inch meters, install with
– 40 inches (102 cm) of straight
pipe upstream and
– 10 inches (26 cm) of straight
pipe downstream.
Flow straightening vanes installed
upstream from the meter can reduce
the upstream pipe length.
Flow control valves upstream from
the meter and within the straight pipe
distances given earlier can adversely
effect meter accuracy. This is espe-
cially true when measuring liquids
with low vapor pressures such as
fuels, oils and solvents.
If cavitation effects meter accuracy, a
flow control valve on the downstream
side of the meter can provide a back
pressure of 5 to 50 PSI (0.3 to 3.4
bar) to minimize the problem.
5
Advertisement
Table of Contents
