3.3.3
Conduit entries
Upon installation, ensure that each conduit entry is either sealed with a conduit plug using
appropriate thread sealant or has a conduit fitting or cable gland installed with appropriate
thread sealant.
Figure 3-2: Conduit Entries
A. Conduit entries
3.3.4
Choosing an installation location and position
When choosing an installation location and position, take into account access to the
transmitter for ease of power module and sensor replacement. For best performance,
install the antenna vertically with space between objects in a parallel metal plane, such as
a pipe or metal framework, as the pipes or framework may adversely affect the antenna's
performance.
The Rosemount 928 is a diffusion-based gas monitor. This means that the target gas must
actually come into contact with the electrochemical sensor for the device to register a
signal. Each target gas has a unique density and behaves differently depending on the
density of the surrounding atmosphere. For example, hydrogen sulfide is considered a
heavier-than-air gas and tends to settle in low-lying areas when released into the air.
Install all transmitters with the sensor module facing downwards. Install devices with
sensors for heavier-than-air gases close to ground level, ideally between 12 in. (30.5 cm)
above the ground and a breathing zone of a worker (3- 6 ft. [9 - 1.8 m] above grade level).
Install
Reference Manual
September 2019
00809-0100-4928
110
Emerson.com/Rosemount
Summary of Contents for Rosemount 928
Page 1: ...Reference Manual 00809 0100 4928 Rev AE September 2019 Rosemount 928 Wireless Gas Monitor ...
Page 4: ...4 ...
Page 8: ...Contents Reference Manual September 2019 00809 0100 4928 viii Emerson com Rosemount ...
Page 106: ...Configuration Reference Manual September 2019 00809 0100 4928 106 Emerson com Rosemount ...
Page 178: ...Troubleshooting Reference Manual September 2019 00809 0100 4928 178 Emerson com Rosemount ...