Bird Technologies 6730B User Manual
INSTRUCTION BOOK
OPERATING INSTRUCTIONS
SERIES 6730B
TERMALINE® WATTMETER
Electronic Corporation
Cleveland(Solon)Ohio USA
© Copyright 1997 by Bird Electronic Corporation
Instruction Book Part Number 920-6730B Rev. B
®
Termaline
is a Registered Trademark
of Bird Electronic Corporation
Limited Warranty
All products manufactured by Seller are warranted to be free from defects in
material and workmanship for a period of one (1) year, unless otherwise spec
ified, from date of shipment and to conform to applicable specifications, draw
ings, blueprints and/or samples. Seller’s sole obligation under these
warranties shall be to issue credit, repair or replace any item or part thereof
which is proved to be other than as warranted; no allowance shall be made for
any labor charges of Buyer for replacement of parts, adjustment or repairs, or
any other work, unless such charges are authorized in advance by Seller.
If Seller’s products are claimed to be defective in material or workmanship or
not to conform to specifications, drawings, blueprints and/or samples, Seller
shall, upon prompt notice thereof, either examine the products where they
are located or issue shipping instructions for return to Seller (transportation-charges prepaid by Buyer). In the event any of our products are proved to
be other than as warranted, transportation costs (cheapest way) to and from
Seller’s plant, will be borne by Seller and reimbursement or credit will be
made 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 or by the performance of repairs
or alterations outside of our plant, and shall not apply to any goods or parts
thereof furnished by Buyer or acquired from others at Buyer’s request and/or
to Buyer’s specifications. In addition, Seller’s warranties do not extend to the
failure of tubes, transistors, fuses and batteries, or to other equipment and
parts manufactured by others except to the extent of the original manufac
turer’s warranty to Seller.
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The obligations under the foregoing warranties are limited to the precise
terms thereof. These warranties provide exclusive remedies, expressly in lieu
of all other remedies including claims for special or consequential damages.
SELLER NEITHER MAKES NOR ASSUMES ANY OTHER WARRANTY
WHATSOEVER, WHETHER EXPRESS, STATUTORY, OR IMPLIED, IN
CLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS, AND
NO PERSON IS AUTHORIZED TO ASSUME FOR SELLER ANY OBLIGA
TION OR LIABILITY NOT STRICTLY IN ACCORDANCE WITH THE
FOREGOING.
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SAFETY PRECAUTIONS
The following are general safety precautions that are not necessarily related
to any specific part or procedure and do not necessarily appear elsewhere in
this publication. These precautions must be thoroughly understood and apply
to all phases of operation and maintenance.
KEEP AWAY FROM LIVE CIRCUITS
Operating personnel must at all times observe normal safety regulations. Do
not replace components or make adjustments to the inside of the test equip
ment with the high voltage supply turned on. To avoid casualties, always dis
connect power.
DO NOT SERVICE OR ADJUST ALONE
Operating personnel must at all times observe normal safety regulations. Do
not attempt to replace parts or disconnect a RF transmission or any other
high voltage line while power is applied. When working with high voltage always have someone present who is capable of rendering aid if necessary. Personnel working with or near high voltage should be familiar with modern
methods of resuscitation.
SAFETY EARTH GROUND
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An uninterruptible earth safety ground must be supplied from the main
power source to test instruments. Grounding one conductor of a two conduc
tor power cable is not sufficient protection. Serious injury or death can occur
if this grounding is not properly supplied.
SHOCK HAZARD
HIGH VOLTAGE is used in the operation of this equipment. DEATH ON
CONTACT may result if personnel fail to observe safety precautions. Learn
the areas containing high voltages in each part of the equipment. Be careful
not to contact high voltage connections when installing or operating this
equipment.
CHEMICAL HAZARD
Solvents used to clean parts are potentially dangerous. Avoid inhalation of
fumes and also prolonged skin contact.
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RESUSCITATION
Personnel working with or near high voltages should be familiar with modern
methods of resuscitation. Such information may be obtained from the Bureau
of Medicine and Surgery.
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 instrument.
6730B WARNING STATEMENTS
The following safety warnings appear in the text where there is danger to operating and maintenance personnel and are repeated here for emphasis.
WARNING
Before applying RF power to the Models 6735-300A, 6736-030A or 6736A
be sure to remove the shipping plug, P/N 2450-049 located near or on
top of the radiator. Replace the shipping plug with the supplied breather
vent plug, P/N 2450-094. This is important as internal pressure build-up,
caused by expansion of the heated dielectric coolant, could cause damage
to the equipment and injury to the operator.
WARNING
When the unit is used in the upper range of its power capacity, the
radiator will become hot - care should be used in touching the
equipment.
WARNING
Do not attempt to operate the Termaline Wattmeter for prolonged
periods at higher than rated load levels. Damage to the equipment and
injury to the operator may result.
WARNING
Never attempt to disconnect any RF equipment from the transmission
line while RF power is being applied. Leaking RF energy is a potential
health hazard.
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6730B CAUTION STATEMENTS
The following equipment cautions appear in the text whenever the equipment
is in danger of damage and are repeated here for emphasis.
CAUTION
Model 6735-300A is rated for 1200 W operation for a maximum of ½
hour only. For continuous operation, the maximum wattage should be
restricted to 1000 W. It is recommended that if frequent use above 1000
W is contemplated, the instrument be equipped with the thermoswitch
assembly.
CAUTION
Do not replace coolant with anything but the specified fluid. The inner
shell of the resistor housing is contoured to the dielectric properties of
this fluid. The use of any other type of coolant will affect the electrical
performance of the load.
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About This Manual
This instruction book covers the models 6732B, 6734B, 6734B-030,
6735-300A, 6736A, 6736-030A, 6737A, and 6737-030A Termaline Wattmeter.
This instruction book is arranged so that essential information on safety is
contained in the front of the book. Reading the Safety Precautions Section
before operating the equipment is strongly advised.
The remainder of this Instruction Book is divided into Chapters and Sections.
At the beginning of each chapter a general overview will be given, describing
the contents of that chapter
OPERATION
First time operators should read Chapter 1 - Introduction, and Chapter 3 Installation, to get an overview of equipment capabilities and how to install
it. An experienced operator can refer to Chapter 4 - Operating Instructions.
All instructions necessary to operate the equipment, are contained in this
section.
MAINTENANCE
All personnel should be familiar with preventative maintenance found in
Chapter 5 - Maintenance. If a failure should occur, the troubleshooting sec
tion will aid in isolating and repairing the failure.
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PARTS
For location of major assemblies or parts refer to the part lists and associated
drawings in Chapter 5.
CHANGES TO THIS MANUAL
We have made every effort to ensure this manual is accurate at the time of
publication. If you should discover any errors or if you have suggestions for
improving this manual, please send your comment to our factory. This
manual may be periodically updated, when inquiring about updates to this
manual refer to the part number and revision level on the title page.
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TABLE OF CONTENTS
Safety Precautions ......................i
Warning Statements ....................ii
Caution Statements ....................iii
About This Manual .....................iv
Introduction .........................1
Purpose and Function ...................1
Dimensions and Weight ..................1
Power and Utility Requirements ...............1
Environmental Requirements ................2
Items Furnished ......................2
Optional Items ......................2
Items Required ......................2
Principles of Operation ....................5
Cooling..........................6
Installation .........................9
Mounting Rectangle ....................9
Installing the Vent Plug ..................9
Installing the Thermoswitch ................10
Connecting the Thermoswitch ...............11
Operating Instructions ...................13
Controls .........................13
Start-Up ........................13
Normal Operation ....................13
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Operation Under Emergency, Adverse, or Abnormal Conditions . 14
Shutdown ........................14
Emergency Shutdown ...................14
Maintenance ........................15
Troubleshooting.........................15
Cleaning ............................16
Outside Surfaces .....................16
Radiator.........................16
Inspection ...........................16
Preventive Maintenance .....................16
RF Assembly Test ........................16
Disassembly ..........................17
RF Connector ......................17
Diaphragm and Coolant Oil ................18
RF Load Resistor .....................19
Assembly ...........................21
RF Connector ......................21
Diaphragm and Coolant Oil ................21
RF Load Resistor .....................22
Storage ............................22
Shipment ...........................22
Load Portion .......................22
Meter Portion ......................22
Low Frequency Line Section ................22
Customer Service ........................23
Replacement Parts List ...................24
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Chapter 1
Introduction
This instruction book is intended for use by operators of
the Models 6732B, 6734B, 6734B030, 6735-300A, 6736A,
6736-030A, 6737A, and 6737-030A Termaline Wattmeter.
This chapter contains introductory information including
product specifications, items supplied, and accessory items
available.
Purpose
and
Function
Dimensions
and Weight
A Series 6730B Termaline Wattmeter is a portable direct
reading absorption wattmeter that both measures and
dissipates RF power. It is a self-contained unit that re
quires no outside power source or additional equipment,
except for the Models 6737A and 6737-030A which must
have auxiliary water cooling. The load portion forms an
accurate, dependable and practically non-reflective 50
ohm termination for the adjustment, standby and testing
of transmitters under nonradiating conditions.
These Termaline Wattmeters can safely measure and absorb their maximum rated RF power. The low frequency
units will measure power to within ±5 percent of full
scale over the frequency band of 2 to 32 MHz. The rest of
their frequency range permits power measurement to ±10
percent of full scale. The high frequency units measure to
±5 percent of full scale from 25 to 512 MHz and ±10 per
cent of full scale from 512 to 1000 MHz. Each meter has
three switch selectable scales and is housed separately
from the load.
The dimensions of the individual loads are given in the
specifications on page 3. The meter housings are 5 9/16
inchWx6½inchHx411/64 inch D (141 x 165 x 106
mm) for the Model 6735, 6736, and 6737 series and 3 7/8
inchWx55/8inchHx37/8inch D (98 x 143 x 98
mm) for the Model 6732 and 6734 series. The total
weight for each wattmeter is also given in the
specifications. The shipping weights will run approxi
mately 20 percent higher.
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Power and
Utility
Require-
ments
The Series 6730B Termaline Wattmeters require no exter
nal source of electrical power other than the RF input
power for operation. The Models 6737A and 6737-030A
do, however, depend on a supplemental water supply for
cooling.
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Bird Model 6730B Series Termaline Wattmeter
Environ-
mental
Require-
ments
Items
Furnished
Optional
Items
Items
Required
These wattmeters should be operated in a dust and vibra
tion free environment. The ambient temperature range
should remain between -40°C and +45°C (-40°F and
+113°F) for proper operation. Allow at least 6 inches (150
mm) of clearance around the units to permit unimpeded
access of natural air convection currents for adequate
heat dissipation.
These models consist of a load with a line section/voltme
ter assembly RF input. The meter assembly is connected
to the voltmeter through a dc cable assembly. This in
struction book, part number 920-6730B is the only other
item furnished with these models.
The models 6734B030, 6736-030A, and 6737-030A are
equipped with a special low frequency line section P/N
6734-034. This line section can also be ordered as an op
tion to convert the models 6734B, 6736A, or 6737A to the
low frequency (-030) version.
A matching connector to the wattmeter is needed on the
coaxial transmission line. Water cooled Models 6737A and
6737-030A must also have a conveniently located water
supply and a drain.
Only simple tools such as screwdrivers will be necessary
for disassembly of this equipment. A resistance bridge or
ohmmeter with an accuracy of at least ± 1% at 50 ohms
is useful for checking the resistance value of the RF section assembly.
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Introduction
Specifications
Impedance 50 ohms nominal
VSWR
6734B030, 6736-030A
6737-030A 1.10:1.00 max. dc - 35MHz
6734B, 6736A,
6735-300A, 6737A 1.15:1.00 max. dc - 1000MHz
6732B 1.15:1.00 max. dc - 800MHz
1.20:1.00 max. 800 - 1000MHz
Accuracy
6734B030
± 5% of full scale 2 - 32MHz
6736-030A
6737-030A
6732B, 6734B, 6736A,
6735-300A, 6737A
Ambient Temperature -40°C to +45°C (-40°F to +113°F)
Cooling Method
All Models Oil dielectric & air convection currents
6737A & 6737-030A Supplemental water cooling
Operating Position
6737A & 6737-030A Vertical - connector down with water
All other models Horizontal
Finish Light navy gray baked enamel
± 5% of full scale 2 - 30MHz
± 10% of full scale 1.5 - 2MHz
30 - 32MHz
± 5% of full scale 2 - 32MHz
± 10% of full scale 1.5 - 2MHz
32 - 35MHz
± 5% of full scale 25 - 512MHz
± 10% of full scale 512 - 1000MHz
(MIL-E-15090)
—specifications continued on next page—
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