Kipp & Zonen CGR 4 Instruction Manual

Kipp & Zonen CGR 4 Instruction Manual Manual pdf 18 page image

3.4. HousingThe radiometer housing accommodates all fundamental pygeometer parts. The anodized Aluminiumparts are light weight and give a high mechanical and thermal stability to the instrument. Due to its finemechanical construction all pyrgeometers are virtually sealed and comply to the international standardIP 67. Each pyrgeometer model can be leveled by using the bubble level and two leveling feet. For easeof maintenance the bubble level is situated next to the dome of the instrument and due to the specialshape of the sun shield it is visible from above. The sun shield acts to protects all the external parts fromradiation and to reduce solar heating of the housing.3.5. Drying cartridgeIn case moisture enters the radiometer body the silica-gel desiccant regulates the humidity level insidethe pyrgeometer. Initially the desiccant will have an orange colour. After some time it becomes saturatedwith moisture and the colour will change to become clear (transparent). At this time the contents of thedrying cartridge should be replaced with fresh, unsaturated orange colored desiccant as soon as possible.Replacement desiccant is available through Kipp & Zonen distributors.3.6. Cable and connectorFor ease of installation and replacement during recalibration of the radiometer, the CGR series areprovided with a weather proof signal cable connector.Kipp & Zonen radiometers use a custom-made cable that is selected as a low noise type particularlysuited to handle the low voltage output of the thermopile or of a temperature sensor.The shield of the cable is connected to the metal body of the connector and preferably should beconnected to ground at the readout equipment. Cables come pre-wired to the connector plug in a rangeof lengths.Page 18 CGR 4 Manual