Emerson Incus GDU-01-TT, Quick Start Manual

Page: 5 / 24

1 Introduction
1.1 Product overview
Emerson has designed the GDU-01-TT Ultrasonic Test Transmitter to
electrically replace the airborne ultrasound generated from a pressurized
gas leak using a piezoelectric disc. You can use the GDU-01-TT to activate
alarm conditions with any ultrasonic gas leak detector.
When gas moves from a high-pressure area to a low-pressure area, it
generates airborne ultrasound. The ultrasonic sound level depends on three
main factors:
• Pressure drop across leak
• Size of leak (area)
• Specific gas properties (molecular weight and specific gas ratio)
The GDU-01-TT is constructed from 316 stainless steel mounting hardware
and a semi-crystalline polyphenylene sulfide (PPS) enclosure. The
transmitter is battery-operated and is intended to be activated within close
proximity of an ultrasonic detector. When activated, the transmitter helps to
confirm that the ultrasonic detector is operating correctly.
The transmitter's effective range, due to the nature of the electronically
produced ultrasound, is 8m. The range may be reduced based on the level of
background ultrasound being generated in close proximity to the ultrasonic
detector that the GDU-01-TT is activating.
1.2 Product recycling/disposal
Consider recycling equipment and packaging. Dispose of the product and
packaging in accordance with local and national legislations and regulations.
June 2021 Quick Start Guide
Quick Start Guide 5