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Summary of Contents for Vaisala CA31
- Page 1 Vaisala VLF Antenna CA31 UIDE M210761EN-A February 2006...
- Page 2 The contents are subject to change without prior notice. Please observe that this manual does not create any legally binding obligations for Vaisala towards the customer or end user. All legally binding commitments and agreements are included exclusively in the applicable supply contract or...
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Page 3: Table Of Contents
Product Related Safety Precautions ........5 ESD Protection ................. 5 Recycling .................. 6 Warranty..................6 CHAPTER 2 PRODUCT OVERVIEW.................. 7 Introduction to Vaisala VLF Antenna CA31 ......7 CHAPTER 3 INSTALLATION AND OPERATION ............11 Selecting Location ..............11 Lightning Protection ............11 Mounting................12 Antenna Amplifier .............. - Page 4 User's Guide ______________________________________________________________________ This page intentionally left blank. 2 ___________________________________________________________________ M210761EN-A...
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Page 5: Chapter 1 General Information
- Chapter 4, Maintenance, describes the basic maintenance of the product. - Chapter 5, Troubleshooting, describes the troubleshooting procedure and provides the contact information for technical support. - Chapter 6, Technical Data, provides the technical data of CA31. VAISALA ________________________________________________________________________ 3... -
Page 6: General Safety Considerations
NOTE Note highlights important information on using the product. Feedback Vaisala Customer Documentation Team welcomes your comments and suggestions on the quality and usefulness of this publication. If you find errors or have other suggestions for improvement, please indicate the chapter, section, and page number. You can send comments to us by e-mail: manuals@vaisala.com... -
Page 7: Product Related Safety Precautions
Chapter 1 ________________________________________________________ General Information Product Related Safety Precautions The Vaisala VLF Antenna CA31 delivered to you has been tested for safety and approved as shipped from the factory. Note the following precautions: WARNING Ground the product, and verify outdoor installation grounding periodically to minimize shock hazard. -
Page 8: Recycling
Do not dispose of with regular household refuse. Warranty For certain products Vaisala normally gives a limited one-year warranty. Please observe that any such warranty may not be valid in case of damage due to normal wear and tear, exceptional operating conditions, negligent handling or installation, or unauthorized modifications. -
Page 9: Chapter 2 Product Overview
This chapter introduces the features and system structure of CA31. Introduction to Vaisala VLF Antenna CA31 The CA31 is a free standing whip antenna for local monitoring and synchronization of VLF or Loran-C networks. In addition, these signals enable differential correction of measurements when used for comparison with signals received from a radiosonde. - Page 10 User's Guide ______________________________________________________________________ 0602-009 Figure 1 Vaisala VLF Antenna CA31 System The antenna system consists of the following components (the numbers refer to Figure 1): Whip antenna Extension stand Antenna stand Cable tie Gasket Antenna amplifier Cable from antenna to amplifier (16272ZZ)
- Page 11 Clamp 16238 CA (2 pcs) Grounding cable The guying wire set is used for additional mounting strength. The clamps attach the amplifier to the antenna stand. The grounding cable is used for grounding of the antenna stand. VAISALA ________________________________________________________________________ 9...
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Page 13: Installation And Operation
Lightning Protection The CA31 contains a discharge tube with 90 V threshold for lightning protection. The tube is placed inside the CAA amplifier housing and connected between the cable to the whip antenna and housing wall. -
Page 14: Mounting
10.5 mm and the division of the holes is 80 mm by 80 mm. 0602-010 Figure 2 CA31 Stand Base Plate Dimensions Antenna Amplifier The navigation signal comes from the receiving whip antenna to the connector X1. F1 is an overvoltage protection. -
Page 15: Vlf Signals
V9 (2N 3904) is a voltage amplifier. After V9, there is a gain control potentiometer R10. A1 is a linear circuit amplifier, the output of which is connected to the transformer C21/L4 tuned for 100 kHz. The amplified Loran-C signal goes to the output terminal X2 via C8. VAISALA _______________________________________________________________________ 13... - Page 16 User's Guide ______________________________________________________________________ This page intentionally left blank. 14 __________________________________________________________________ M210761EN-A...
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Page 17: Chapter 4 Maintenance
Also, if the resistor R3 is burned, replace it with a new one. If the damage cannot be repaired with these measures, replace the entire circuit board. Parts List for Consumables Table 1 CA31 Available Spare Parts Spare Part Order Code Antenna amplifier CAA21 15633... - Page 18 User's Guide ______________________________________________________________________ This page intentionally left blank. 16 __________________________________________________________________ M210761EN-A...
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Page 19: Chapter 5 Troubleshooting
What was connected to the product and to which connectors? - Input power source type, voltage and list of other items (lighting, heaters, motors etc.) that were connected to the same power output. - What was done when the failure was noticed? VAISALA _______________________________________________________________________ 17... -
Page 20: Technical Support
If the product needs repair, please follow the instructions below to speed up the process and to avoid extra costs to you. Read the warranty information. Contact Vaisala technical support via e-mail or fax and request for RMA (Return Material Authorization) and shipping instructions. -
Page 21: Chapter 6 Technical Data
Chapter 6 ____________________________________________________________ Technical Data CHAPTER 6 TECHNICAL DATA This chapter provides the technical data of CA31. Specifications Table 2 Vaisala VLF Antenna CA31 Dimensions Property Description/Value Whip height 250 cm Antenna height overall 600 cm Antenna stand base plate... -
Page 22: Parts List
User's Guide ______________________________________________________________________ Parts List Table 4 Antenna Amplifier Parts List Reference Part Description Integrated Circuits 15358 MC1350P RF/IF/Audio ampl. AGC PDIL 8 Transistors V3, V4 5576 2N 3819 30 V 20 mA 400 MHz TO-92 5565 2N 2219 30 V 800 mA 250 MHz TO-5 3555 2N 3904 40 V 200 mA 300 MHz TO-92 Diodes... - Page 23 Chapter 6 ____________________________________________________________ Technical Data Table 5 Vaisala VLF Antenna CA31 Parts List Reference Part No Description 4323 11BNC-50-3-4C connector 4455 22BNC-50-0-5 connector 6581 21N-50-3-5C N-connector 16272 ZZ AJS 50-3 coaxial cable 50 ohm PVC VAISALA _______________________________________________________________________ 21...
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