RayTek GP Series Operating Instructions Manual page 47

Installation of Sensing Heads
4.2 Preparation
Sensor location depends on the application. Before deciding on a
location, you need to be aware of the ambient temperature of the
location, the atmospheric quality of the location, and the possible
electromagnetic interference in that location. If you plan to use air
purging, you need to have an air connection available. Wiring and
conduit runs must be considered
4.3 Ambient Temperature
The GP Monitor is designed for measurements in ambient
temperatures between 0 to 50°C (32 to 122°F). Operation of these
units outside of specified ambient temperatures is not recommended,
and accuracy cannot be guaranteed.
The GPR/GPS sensing 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.
4.4 Distance to Object
The desired spot size on the target will determine the maximum
measurement distance and the necessary focus length of the optical
module. To avoid erroneous readings the target spot size must
contain the entire field of view of the sensor. Consequently, the
sensor must be positioned so the field of view is the same as or
smaller than the desired target size.
Rev. F 10/2011
40 GP Series