Figure 34: Fixed Mounting Bracket

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1 5.1 Options Figure 34: Fixed Mounting Bracket Options are those items that are factory installed and must be ordered with base model units ISO Calibration Certificate, based on NIST/DKD certified probes (GPR: XXXGPCERT, GPS: XXXGPSCERT) Air/water-cooled housing (...W) Air/Water-cooled Housing (GPR/GPS) The air/water-cooled housing option allows the sensor to be used in ambient temperatures up to 120 C (250 F) for air-cooled and 177 C (350 F) for water-cooled. It is supplied with two 1/8 NPT brass fittings. Air flow should be 25 C (77 F) at 2.8 liters/sec (0.74 gallon/sec) with a pressure drop across the housing of 0.63 kg/cm² (9 PSI). Water flow should be approximately 2 liters (0.5 gallons) per minute. Water temperature should be C (50-80 F) for efficient cooling. Using chilled water below 10 C (50 F) is not recommended. To avoid condensation, it is recommended to use the Air Purge Collar with the Water Cooled Housing. GP Series Rev. F 10/

2 Figure 35: GPR Head with Air/Water-cooled Housing Figure 36: GPS Head with Air/Water-cooled Housing 48 Rev. F 10/2011 GP Series

3 5.2 Zubehör GPR/GPS Sensing Head Accessories include items that may be ordered at any time and added on-site: Adjustable Mounting Bracket (XXXTXXACAB) Air Purge Collar (XXXTXXACAP) 90 Umlenkspiegel (XXXTXXACRA) Visierhilfe (nur GPR) (XXXTXXACSV) Schutzrohradapter (XXXTXXACCA) Rohradapter (XXXTXXACPA) Starrer Montagewinkel (im Lieferumfang) (XXXTXXACFB) Montagemutter, (im Lieferumfang) (XXXTXXACMN) Kabel: 4 m Hochtemperaturkabel: 8 m oder 15 m Adjustable Mounting Bracket An adjustable mounting bracket is available if you require a sensor that can be aimed at different targets from the same mounted position Air Purge Collar Figure 37: Adjustable Mounting Bracket The Air Purge Collar is used to keep dust, moisture, airborne particles, and vapors away from the lens. It can be installed before or after the mounting bracket. It must be screwed in fully. Air flows into GP Series Rev. F 10/

4 the 1/8 NPT brass fitting and out the front aperture. Air flow should be a maximum of l/s (1-3 cfm). Clean or instrument air is recommended to avoid contaminants from settling on the lens. Figure 38: Air Purge Collar 50 Rev. F 10/2011 GP Series

5 5.2.3 Right Angle Mirror GPR/GPS Sensing Head The Right Angle Mirror is used to obtain a perpendicular view of the object. It is often used when space is limited or when you need to avoid excessive radiation to the sensor. It must be installed after the bracket or after the Air Purge Collar (if used) and screwed in fully. In dusty or contaminated environments, air purging is required to keep the first surface mirror clean. If used in conjunction with the Air Purge Collar, both the Right Angle Mirror and the Air Purge Collar must be air purged. Figure 39: Right Angle Mirror When using the Right Angle Mirror, adjust the emissivity settings downward by 5%. For example, for an object with an emissivity of 0.95 use 0.9; for an object with 0.8 use 0.76; for 0.65 use This correction accounts for energy losses in the mirror. GP Series Rev. F 10/

6 5.2.4 Sighting Viewer (GPR) The Sighting Viewer is used to aid in the alignment of the sensor. It can be used when an object is small and far from the sensor. It can also be used when direct in-line sighting is difficult. It can be used both with and without the Air Purge Collar, but not with the Right Angle Mirror. For best results, first secure the sensor to the bracket using the mounting nut or Air Purge Collar and then screw on the Sighting Viewer Tool. Next, position and secure the bracket. Be sure to remove the Sighting Viewer when alignment is complete. Figure 40: Sighting Viewer for GPR Head 5.3 Technical Data Optical Parameter The optical charts indicate the nominal target spot diameter at any given distance from the sensing head. Information in the top half of each diagram is in inches or feet, the bottom half is in metric units. All optical diagrams within this manual assume 90% energy. 52 Rev. F 10/2011 GP Series