VorTek U44 Series, Instruction Manual

Page: 11 / 46

Series U44 Instruction Manual
M-000-00090
11
IN1+ Temperature Sensor
IN1- Temperature Sensor Inline -
GND Temperature Sensor Inline Grounding
2.2 Powering On
As soon as the flow meter is switched on, the system will run automatically according to the last input parameters.
After installation, when the system is switched on, gain adjustment can be monitored in the Run Mode Screens.
After code "*R" is displayed on the upper right corner of the screen, the system will activate the normal measurement
condition automatically. It is indicated by code "*R" on the upper right corner of the screen.
If it is the first use or install on a new site, the customer needs to input the new installation site parameters. Any
parameters which are set by the user will be saved permanently until they are changed by the user.
When the user modifies the parameters and removes the transducers, the meter will recalculate automatically,
and operate normally with the parameters.
The flow meter can always complete all tasks at the same time. The tasks (including measurement, output,
etc.) will be carried out as usual, no matter which screen is displayed.
2.3 Clamp-On Transducer Installation
Please make sure the pipe surface where the transducers are to be mounted is clean. Ensure the removal of rust,
scale, or loose paint to have a smooth surface. Choose the section and apply the coupling compound down the center
of the face of each transducer as well as on the pipe surface. Ensure there are no air bubbles between the transducers
and the pipe wall. Attach the transducers to the pipe with the straps provided and tighten them securely.
Note: The two transducers should be mounted at the pipe’s centerline on horizontal pipes.
Make sure that the transducer mounting direction is parallel with the flow.
During the installation, there should be no air bubbles or particles between the transducer and the pipe wall. On
horizontal pipes, the transducers should be mounted in the 3 o’clock and 9 o’clock positions of the pipe section in
order to avoid any air bubbles inside the top portion of the pipe. (Refer to Measurement Site Selection). If the
transducers cannot be mounted horizontally symmetrically due to limitation of the local installation conditions, it
may be necessary to mount the transducers at a location where there is a guaranteed full pipe condition (the pipe is
always full of liquid).
2.3.1 Measurement Site Selection
The installation of the clamp-on transducers is the simplest of all kinds of flow meters. Only one suitable
measuring site is needed. Attach the transducers to the pipe and start the measurement.
When selecting a measurement site, it is important to select an area where the fluid flow profile is fully
developed to guarantee a highly accurate measurement. Use the following guidelines to select a proper
installation site:
⚫
Choose a section of pipe that is always full of liquid, such as a vertical pipe with flow in the upward
direction or a full horizontal pipe.
⚫
Ensure enough straight pipe length at least equal to the figure shown below for the upstream and
downstream transducers installation.