M4-CYG1UW-TSR-M-ENG_Iss11.docx
Cygnus UW-TSR Operating Manual
7
2.
Introduction
Cygnus UNDERWATER (UW) Thickness Gauge
The Cygnus UNDERWATER Thickness Gauge is a rugged,
handheld, battery-powered instrument designed for high-reliability
ultrasonic thickness measurement using the multiple-echo
technique.
The Cygnus UNDERWATER Thickness Gauge is a fully waterproof
unit designed for use by professional divers. It is pressure rated
and tested to a depth of 300 metres (984 ft). The gauge is
powered by a rechargeable NiMH battery pack.
Measurements can be displayed in Metric (mm) or Imperial (inch)
units; measurement resolution can be selected for either 0.1 mm
or 0.05 mm, (0.005 inch or 0.002
inch). The Gauge has a side
–
mounted red LED display which can easily be read in low-light
situations.
Crystal-controlled Calibration provides stability and accuracy. The
gauge can easily be calibrated to a known thickness or to a known
Velocity of Sound. Velocity of Sound is displayed in either m/s or
in/
μ
s, depending on the current selection for Measurement Units.
The Top-Side Repeater (TSR) facility allows the thickness
measurements to be relayed from the Gauge up to the surface
where they can be observed and recorded. The TSR equipment is
either included with a new Gauge or can be added to the kit later
1
as an accessory.
The Gauge is able to operate accurately in adverse environmental
conditions.
The Gauge is a solid-state electronic instrument which, under
normal operating conditions, will give many years of active
service.
1
To connect the TSR the Cygnus UW gauge must have an integral Impulse Connector fitted.
