Operating Manual

Accu-Wave Glossary
TN Technologies Glossary-5
the process material back
to the gauge sensor.
• Refracted wave
Only of concern when the
process material has a low
dielectric and the material
level in vessel is also low.
Wave train produced
when microwaves cross
boundary between 2
media (for example, air
and process material).
Refracted portion of wave
is that which crosses into
second medium and is not
reflected back to sensor.
• Relay A switch used to
activate the contact
outputs when an alarm
occurs.
• ROI Range of interest.
• EXIT SETUP key
Saves your entries and
returns to the
measurement display.
• Scientific notation
A floating-point system in
which numbers are
expressed as a product of
a number between 1 and
9.999 multiplied by an
appropriate power of 10
(3.465E-4).
• Sensor Contains the
microwave circuitry.
Includes transceiver and
preamp assembly,
antenna, adapter flange,
seals and gaskets.
• Serial port
Accommodates
serial data transmission,
that is, each bit is sent
sequentially (one bit at a
time).
• Set point The
reading at which the
alarm occurs.
• Set up Verb: To
“program” the gauge for
your specific application.
For example, “set up
process alarms.”
• Setup Noun: As in
“level setup.” A type of
configuration, defined by
the customer. An
arrangement of data or
devices to solve a
particular problem.
• Sig Str Signal strength.
• Signal strength
Represents the amplitude
of the signal received by
the sensor. This parameter
appears when you first
power up the gauge. If you
want to use it as a “real”
system parameter, use the
“Set up Additional
Measurements” menu.
There are no units
associated with signal
strength. Minimum
acceptable signal strength
is sometimes used to fine
tune a challenging
application.
• Sparge
To agitate a liquid by
spraying compressed air
or gas through a pipe into
the liquid. Can cause
foamy surface.
• Time constant
Sets the signal filter
damping. A longer time
constant will smooth the
output, reducing the
effects of turbulence. The
default is 4 seconds.
• Toggle Verb: To switch
between 2 selections by
pressing a key. First time,
selection A appears,
second time, selection B,
third time, selection A
again.
• Transceiver
Combination of receiving
and transmitting
equipment located in the
sensor.