BIRD THRULINE 4450 Operating Instructions & Parts List Manual Download Page 8 | Manualshive

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Summary of Contents for THRULINE 4450

Page 1: ...INSTRUCTION BOOK OPERATING INSTRUCTIONS WITH PARTS LIST MODEL 4450 THRULINE WATTMETER ...

Page 2: ... for amounts so expended by Buyer Every such claim for breach of these warranties shall be deemed to be waived by Buyer unless made in writing within ten 10 days from the date of discovery of the defect The above warranties shall not extend to any products or parts thereof which have been subjected to any misuse or neglect damaged by accident rendered defective by reason of improper installation o...

Page 3: ...ATING INSTRUCTIONS WITH PARTS LIST MODEL 4450 THRULINE WATTMETER Copyright 1994 by Bird Electronic Corporation Instruction Book Part Number 920 4450 1 Rev B THRULINE is a registered trademark of Bird Electronic Corporation ...

Page 4: ......

Page 5: ... con tact with skin RESUSCITATION Personnel working with or near high voltages should be familiar with modern methods of resuscitation SAFETY SYMBOLS WARNING Warning notes call attention to a procedure which if not correctly performed could result in personal injury CAUTION Caution notes call attention to a procedure which if not correctly performed could result in damage to the instru ment M O D ...

Page 6: ...e Thruline Wattmeter equipment or submit it to hard blows The voltmeter circuitry or microammeter even though it is shock mounted may be damaged by severe impact CAUTION Clean the meter glass only when necessary and be careful not to use an excessive amount of water detergent solution that might drip inside the housing and damage the electrical components ii ...

Page 7: ...perate the equipment are contained in this section MAINTENANCE All personnel should be familiar with preventive maintenance found in Chapter 5 Maintenance If a failure should occur the troubleshooting section will aid in isolating and repairing the failure PARTS For location of major assemblies or parts refer to the part lists and associated drawings in the maintenance chapter CHANGES Changes to t...

Page 8: ...iv ...

Page 9: ...aveling Wave Concept 2 1 Traveling Wave vs Standing Wave 2 1 Coupling Circuit 2 1 Reflected Power Reading 2 1 Installation Chapter 3 Portability 3 1 Connections 3 1 Operating Instructions Chapter 4 Preliminary Set up 4 1 Reverse Power Operation 4 1 Load Power 4 1 VSWR Calculations 4 2 Maintenance Chapter 5 General 5 1 Sales Repair Facilities 5 1 Sales Facilities 5 1 Preventive Maintenance 5 2 Trou...

Page 10: ...List of Figures Outline Drawing 1 2 Schematic Diagram 1 3 Zero Adjustment Screw 4 1 VSWR Conversion Monograph 4 2 vi ...

Page 11: ...has a slotted adjustment screw on the front face of the meter bezel for mechanical zeroing adjustment Just below the meter on the front face is a mode switch for selecting power range or OFF position On the sides of the unit are the RF connectors which are labeled for input and output Performance Characteristics and Capabilities The Model 4450 Thruline Wattmeter is capable of measuring RF power up...

Page 12: ...F Accuracy From 5 C to 45 C 30 to 535 kHz 20 kHz to 1 MHz Into a 50 ohm load 5 of full scale 10 of full scale Dimensions 3 D x 353 64 W x 67 8 H 76 x 97 2 x 175mm Insertion Loss 0 2 dB maximum Directivity 25 db minimum Weight 2lb 0 91 kg On the 5 Watt range only the lower frequency is 30 kHz for 10 accuracy and the ambient temperature is limited to 15 C to 25 C for this accuracy Outline Drawing Bi...

Page 13: ...Schematic Diagram 1 3 ...

Page 14: ...Bird Model 4450 Thruline Wattmeter 1 4 ...

Page 15: ...tered line section which is a short section of 50 ohm air line This line section will not impair the impedance of the RF coaxial line into which it is inserted The main line or center conductor of this line section passes through a toroid coil which acts as a current transformer having a one turn primary The secondary turns of this toroid coil vary and are determined by the power range involved Th...

Page 16: ...will be indicated on the microammeter as the power opposite to the forward power or reflected power Bird Model 4450 Thruline Wattmeter 2 2 ...

Page 17: ...r in transmission lines of 50 ohms nominal imped ance Attachment is made through the connectors on either side of the wattmeter housing A short length of 50 ohm coaxial transmission cable fitted with appropriate mating connectors should be used when installing the wattmeter The input side of the wattmeter labeled INPUT must be connected to the transmitter output cable and the OUTPUT side of the wa...

Page 18: ...Bird Model 4450 Thruline Wattmeter 3 2 ...

Page 19: ...rning the range switch to a lower setting However with this condition care must be taken not to turn the mode switch back the the FWD position until the range switch has been re turned to its original setting Failure to do this will cause overranging of the meter and possible damage This practice of course is not possible when power less than five watts is being mea sured Reverse Power Operation T...

Page 20: ...ographs to simplify determining VSWR are provided below Simply find the numbers on the horizontal and vertical axis of the nomograph which correspond to the actual forward and reverse power readings respectively Follow the cross lines until they intersect and read the VSWR from the nearest slanted line Bird Model 4450 Thruline Wattmeter 4 2 Figure 4 2 VSWR Conversion Monograph Power Values vs VSWR...

Page 21: ...tmeter is handling use reasonable care and do not drop the unit Any maintenance or service procedure beyond the scope of those provided in this section should be referred to a qualified service center Sales Repair Facilities U S A Sales and Manufacturing Service Group Bird Electronic Corporation 30303 Aurora Road Cleveland Solon Ohio 44139 2794 Phone 440 248 1200 Cable BIRDELEC Fax 440 248 5426 Te...

Page 22: ... use an excessive amount of water detergent solution that might drip inside the housing and damage the electrical components Troubleshooting Table 5 1 contains troubleshooting information for problems which can occur during normal oper ation Locate the problem review the possible causes and perform the action listed Bird Model 4450 Thruline Wattmeter 5 2 PROBLEM CAUSE AREAS TO CHECK CORRECTION No ...

Page 23: ... of connector flanges and pull QC connectors straight off 6 Withdraw the four screws on the line section housing positioned near the top edge Do not remove the screws that secure the mount ing bracket to the housing The circuit board will lift straight out of the housing with the center conductor attached 7 Complete reassembly by reversing the procedure above See note be low NOTE When reassembling...

Page 24: ... 64 Allen wrench loosen the set screws in the switch knobs and remove the knobs 6 Remove the nuts that secure the switches to the front panel with a 9 16 end wrench Unplug the ribbon cable connector from the cali bration board The switch and cable harness assembly can now be removed from the meter housing assembly for repair or replacement If only one switch is to be replaced be sure to reattach t...

Page 25: ...diodes RCA SK3087 D1 D2 5 1571 2 25 k potentiometers R1 R3 5 1364 2 2 100 k potentiometers R2 R4 5 1364 5 2 5k potentiometers R5 R6 5 1572 2 13 ohm R7 R8 5 581 1 1 8 k sensistor SR1 5 595 1 1 5 k sensistors SR3 5 595 7 1 10 k sensistor SR2 5 595 8 2 1000pF ceramic C1 C2 5 1564 1 2 5000pF ceramic C3 C6 5 1564 2 2 15 60pF variable C4 C5 5 1570 1 Switch assembly Includes both switches wire harness 44...

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Page 27: ...m coaxial line systems TERMALINE ABSORPTION WATTMETERS LOAD RESISTORS CALORIMETERS THRULINE DIRECTIONAL MONITORING WATTMETERS TENULINE ATTENUATORS COAXWITCH SELECTOR SWITCHES COAXIAL RF FILTERS SENTRILINE FILTER COUPLERS E L E C T R O N I C C O R P O R A T I O N 30303 Aurora Road Cleveland Solon Ohio 44139 2794 ...

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