B.7 INSTALLATION OF SENSING HEADS
The installation process for the GP Regular Head (GPR), GP Laser Sighting
Head (GPS) and GP Miniature Head (GPM) consists of the following:
•Preparation
• Mechanical Installation
• Electrical Installation
The most important part in the installation process is preparation. Please
read Section B.7.1, Preparation, thoroughly before proceeding with the
mechanical and electrical installation sections. Note that the Mechanical and
Electrical Installation sections for the GPR and GPM are divided as follows:
• Section B.7.2 covers the GPR/GPS Mechanical Installation
• Section B.7.3 covers the GPR/GPS Electrical Installation
• Section B.7.4 covers the GPM Mechanical Installation
• Section B.7.5 covers the GPM Electrical Installation
Aiming the sensing head is covered in Section B.7.6.
B.7.1 Preparation
Sensor location and configuration depends on the application. Before decid-
ing on a location, be aware of the ambient temperature of the location, the
atmospheric quality of the location, and the possible electromagnetic interfer-
ence in that location. If you plan to use air purging, you need to have an air
connection available. Also, wiring and conduit runs must be considered. The
following subsections cover topics to consider before you install the sensor.
B.7.1.1 Ambient Temperature
The GPR/GPS optical heads operate in ambient temperatures of 0 to 65°C (32
to 150°F). (Laser operates from 0 to 50°C (32 to 122°F.) In ambient conditions
above 65°C (150°F), an optional air/water-cooled housing is available, which
extends the ambient operating range to 120°C (250°F) with air cooling or
177°C (350°F) with water cooling.
The GPM optical head is designed to operate in ambient temperatures of 0 to
85°C (32 to 185°F). With the air cooling accessory, it can operate in ambient
temperatures up to 200°C (392°F).
Thermalert GP Series Operator’s Manual 57
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