INSTRUCTION BOOK
TERMALINE® LOAD RESISTOR
SEMICONDUCTOR
SERIES 8860SC
©Copyright 2007 by Bird Electronic Corporation
Instruction Book Part Number 920-8860-SEMICON
Termaline
®
and Tenuline® are Registered Trademarks
of Bird Electronic Corporation
Rev. B
I am not blank
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 inside the equipment
with high voltage turned on. To avoid casualties, always remove power.
Shock Hazard
Do not attempt to remove the RF transmission line while RF power is
present.
Do Not Service or Adjust Alone
Under no circumstances should any person reach into an enclosure for the
purpose of service or adjustment of equipment except in the presence of
someone who is capable of rendering aid.
Safety Earth Ground
An uninterruptible earth safety ground must be supplied from the main
power source to test instruments. Grounding one conductor of a two
conductor power cable is not sufficient protection. Serious injury or death
can occur if this grounding is not properly supplied.
Chemical Hazard
Dry cleaning solvents for cleaning parts may be potentially dangerous.
Avoid inhalation of fumes or prolonged contact with skin.
Resuscitation
Personnel working with or near high voltages should be familiar with
modern methods of resuscitation.
i
Bird 8860 Series Semiconductor Termaline Coaxial Load Resistor
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.
This symbol indicates that a shock hazard exists if the
precautions in the instruction manual are not follwed.
The caution symbol appears on the equipment indicating
there is important information in the instruction manual
regarding that particular area.
This symbol indicates that the unit radiates heat and
should not be touched while hot.
+ NOTE: Calls attention to supplemental information.
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
The vent plug must be used at all times when the unit is operating or
cooling. Failure to do so could result in an explosion or severe burns.
WARNING
Never attempt to connect or disconnect RF equipment from the
transmission line while RF power is being applied.
Leaking RF energy is a potential health hazard.
WARNING
Disconnect the unit from all power sources before servicing.
The unit may be energized from multiple sources.
The potential for electric shock exists.
ii
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
This load is designed for operation in a horizontal position only, with
the vent plug up. Do not use in any other manner.
CAUTION
If installed, connect optional interlock before applying RF power.
CAUTION
Use only Bird coolant, P/N 5-1070, to prevent damage to the load.
Safety Statements
USAGE
ANY USE OF THIS INSTRUMENT IN A MANNER NOT
SPECIFIED BY THE MANUFACTURER MAY IMPAIR THE
INSTRUMENT’S SAFETY PROTECTION.
USO
EL USO DE ESTE INSTRUMENTO DE MANERA NO ESPECIFICADA
POR EL FABRICANTE, PUEDE ANULAR LA PROTECCIÓN DE
SEGURIDAD DEL INSTRUMENTO.
BENUTZUNG
WIRD DAS GERÄT AUF ANDERE WEISE VERWENDET ALS VOM
HERSTELLER BESCHRIEBEN, KANN DIE GERÄTESICHERHEIT
BEEINTRÄCHTIGT WERDEN.
UTILISATION
TOUTE UTILISATION DE CET INSTRUMENT QUI N’EST PAS
EXPLICITEMENT PRÉVUE PAR LE FABRICANT PEUT
ENDOMMAGER LE DISPOSITIF DE PROTECTION DE
L’INSTRUMENT.
IMPIEGO
QUALORA QUESTO STRUMENTO VENISSE UTILIZZATO IN MODO
DIVERSO DA COME SPECIFICATO DAL PRODUTTORE LA
PROZIONE DI SICUREZZA POTREBBE VENIRNE COMPROMESSA.
SERVICE
iii
Bird 8860 Series Semiconductor Termaline Coaxial Load Resistor
SERVICING INSTRUCTIONS ARE FOR USE BY SERVICE TRAINED PERSONNEL ONLY. TO AVOID DANGEROUS
ELECTRIC SHOCK, DO NOT PERFORM ANY SERVICING
UNLESS QUALIFIED TO DO SO.
SERVICIO
LAS INSTRUCCIONES DE SERVICIO SON PARA USO EXCLUSIVO
DEL PERSONAL DE SERVICIO CAPACITADO. PARA EVITAR EL
PELIGRO DE DESCARGÉAS ELCTRICAS, NO REALICE NINGÚN
SERVICIO A MENOS QUE ESTÉ CAPACITADO PARA HACERIO.
WARTUNG
ANWEISUNGEN FÜR DIE WARTUNG DES GERÄTES GELTEN NUR
FÜR GESCHULTES FACHPERSONAL.
ZUR VERMEIDUNG GEFÄHRLICHE, ELEKTRISCHE SCHOCKS,
SIND WARTUNGSARBEITEN AUSSCHLIEßLICH VON
QUALIFIZIERTEM SERVICEPERSONAL DURCHZUFÜHREN.
ENTRENTIEN
L’EMPLOI DES INSTRUCTIONS D’ENTRETIEN DOIT ÊTRE
RÉSERVÉ AU PERSONNEL FORMÉ AUX OPÉRATIONS
D’ENTRETIEN. POUR PRÉVENIR UN CHOC ÉLECTRIQUE
DANGEREUX, NE PAS EFFECTUER D’ENTRETIEN SI L’ON N’A PAS
ÉTÉ QUALIFIÉ POUR CE FAIRE.
ASSISTENZA TECNICA
LE ISTRUZIONI RELATIVE ALL’ASSISTENZA SONO PREVISTE
ESCLUSIVAMENTE PER IL PERSONALE OPPORTUNAMENTE
ADDESTRATO. PER EVITARE PERICOLOSE SCOSSE ELETTRICHE
NON EFFETTUARRE ALCUNA RIPARAZIONE A MENO CHE
QUALIFICATI A FARLA.
CONNECT INTERLOCK TO TRANSMITTER/GENERATOR/
AMPLIFIER BEFORE OPERATING.
BRANCHER LE VERROUILLAGE À L’ÉMETTEUR/
GÉNÉRATEUR/AMPLIFICATEUR AVANT EMPLOI.
CONECTE EL INTERBLOQUEO AL TRANSMISOR/GENERADOR/
AMPLIFICADOR ANTES DE LA OPERACION.
VOR INBETRIEBNAHME VERRIEGELUNG AM SENDER/
GENERATOR/VERSTÄRKER ANSCHLIESSEN.
PRIMA DI METTERE IN FUNZIONE L’APPARECCHIO, COLLEGARE
IL DISPOSITIVO DI BLOCCO AL TRASMETTITORE/GENERATORE/
AMPLIFICATORE.
iv
About This Manual
This instruction book covers the models listed below.
8865SC13
This instruction book is arranged so that essential information on safety
is in the front of the book. Reading the Safety Precautions before
operating the equipment is strongly advised. The remainder of this
instruction book is divided into Chapters and Sections.
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 trouble-shooting
section will aid in isolating and repairing the failure. Parts lists and
repair instructions are also in this chapter.
Changes
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.
v
Table of Contents
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . i
About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Items Supplied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Items Required but not Supplied. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Theory of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Load Resistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Thermal Interlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Unpacking and Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installing Thermoswitch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Interlock Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Connecting RF Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Operation Under Abnormal Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Emergency Shutdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
DC Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Coolant Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
vi
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
RF Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Load Resistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Storage and Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Customer Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Available “QC” Type Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
vii
viii
Chapter 1 Introduction
Bird 8860 Series Semiconductor Loads are portable 50 ohm coaxial
RF transmission line terminations. They are designed for frequency
ranges of dc – 28 MHz, specially calibrated for greater stability at
13.56 MHz. They provide accurate, dependable, and low reflection
line terminations. Up to 1000 watts of RF power can be dissipated.
The load has a coolant chamber surrounded by radiator fins. The
front and rear fins form mounting flanges which can be used as
supports for freestanding use or as brackets for fixed mounting. A
vent plug at the top of the unit relieves internal pressure from coolant
expansion. The load’s simple and rugged design minimizes
maintenance requirements.
Items Supplied y Load Resistor: Pre-filled with coolant at the factory
y Shipping Plug
y Vent Plug
Items Required but
not Supplied
Optional
Accessories
y Instruction Manual
y Coupling Kit: Connects the load to the RF line
y Interlock Thermoswitch: Automatically shuts off the generator to
prevent overheating of the load
1
Bird 8860 Series Semiconductor Termaline Coaxial Load Resistor
MTG. HOLE
DETAIL
13/32”
(10 mm)
3/32”
(2.4 mm)
3/8”
(9.5 mm)
(4) MTG. HOLES
SEE DETAIL
4.5”
(114 mm)
7.5”
(190 mm)
15-7/8”
(403 mm)
13-1/8”
(333 mm)
3”
(75 mm)
DEPENDS ON
CONNECTOR
INTERLOCK
THERMOSWITCH
(OPTIONAL)
VENT PLUG
15-1/4”
(387 mm)
Figure 1
Bird 8860 Series
Outline Drawing
2
Chapter 2 Theory of Operation
Load Resistor Bird 8860 series loads consist of a thin-film-on-ceramic resistor
immersed in a dielectric coolant. The resistor, individually selected
for its accuracy, is enclosed in a special housing. When surrounded by
the coolant, this produces a uniform, practically reflectionless line
termination over the specified frequencies.
Coolant The load is cooled by natural fluid and air convection currents. The
coolant, chosen for its dielectric and thermal characteristics, carries
heat from the resistor to the walls of the cooling tank, where radiator
fins surrounding the tank transfer the heat to the air.
When the coolant is heated, thermal expansion causes an increase in
the internal pressure. The vent plug relieves this pressure while
protecting the opening from dirt or other contaminants.
Thermal Interlock Loads can be supplied with an optional passive overtemperature
thermoswitch. Normally closed, it opens at the maximum safe load
temperature of 236 °C (457 °F), turning off power to the RF
generator. The interlock system will not permit reoperation of the
generator until the load has reached a lower, safe temperature.
3
Bird 8860 Series Semiconductor Termaline Coaxial Load Resistor
O-ring seal
O-ring seal
Figure 2
Shipping Plug
Figure 3
Vent Plug
4
Chapter 3 Installation
This chapter provides information for on-site requirements,
unpacking, inspection, and preparing the load for use.
Unpacking and
Inspection
1. Carefully inspect the shipping container for signs of damage. If
damage is noticed, do not unpack the unit. Immediately notify the
shipping carrier and Bird Electronic Corporation.
2. If the container is not damaged, unpack the unit. Save the
packing materials in case the unit needs to be shipped again.
3. Inspect all of the components for visible signs of damage.
Immediately notify the shipping carrier and Bird Electronic
Corporation of equipment damage or missing parts.
Setup y Before first using the load, get a resistance baseline for future
maintenance. Refer to
“DC Resistance” on page 12 for details.
y Remove the shipping plug from the load and replace it with the
vent plug. Refer to
The vent plug must be used at all times when the unit is
operating or cooling. Failure to do so could result in an
Mounting Place the load in a dry, dust and vibration free environment. Do not
use outdoors or in areas of condensing humidity. Allow at least 12"
(30 cm) of clearance on all sides of the load.
Figure 2 and Figure 3 for pictures of the plugs.
WARNING
explosion or severe burns.
CAUTION
This load is designed for operation in a horizontal position only,
with the vent plug up. Do not use in any other manner.
These loads are equipped for either portable use or fixed installation.
The mounting brackets on the front and rear faces have four mounting
slots arranged in a 4
3
⁄
screw with a
" (9.53 mm) diameter max.
8
1
⁄
2
" x 14
7
⁄
" rectangle (114.3 x 361.2 mm). Use a
32
5
Bird 8860 Series Semiconductor Termaline Coaxial Load Resistor
Installing
Thermoswitch
Bird 8860 series loads can be equipped with an optional interlock
thermoswitch, P/N 8890-008. It is normally closed, opening at 236 °C
(457 °F), with a rating of 10A @ 120Vac and 5A @ 230Vac.
WARNING
The vent plug must be used at all times when the unit is
operating or cooling. Failure to do so could result in an
explosion or severe burns.
To install or replace the thermoswitch:
1. Remove the vent plug and install the shipping plug.
2. Stand the unit on its front, supporting it so that the connector is
not damaged. In this position there is no danger of the coolant
pouring out through the socket plug hole.
3. Remove the socket plug just above the connector assembly, using
9
⁄
" hex wrench.
a
16
4. Replace the plug with the thermoswitch. Sparingly apply pipe
sealing compound to the external threads, only, of the
thermoswitch. Do not contaminate the coolant with pipe sealant.
5. Check for coolant leaks upon completion.
6
Installation
Interlock
Connection
Connect the thermoswitch to the interlock as follows (see Figure 4):
CAUTION
If installed, connect optional interlock before applying RF power.
1. Unscrew the large knurled ring-nut (A) at the lower end of the
coupling jack assembly. Pull it off the thermoswitch jack (B).
Unscrew the small knurled cover fitting from the base plug (D) of
the connector to release the base.
2. Thread the control switch wires through the clamp (E) with the
washers (F) inside and with its threaded fitting in place. Service
the control switch wire with short tips and put spaghetti sleeves
over the wire ends if necessary.
3. Securely solder the control switch leads to the lugs (G) of the
connector base.
+ NOTE: The ring-nut (A) must be in place over the base plug (D)
with the knurled end facing out.
4. Screw on the cover ring, then fasten the cable clamp (E) in place
and tighten both yoke screws (H).
Figure 4
Thermoswitch
Assembly
5. Put the plug back on the thermoswitch and tighten the nut (A).
7
Bird 8860 Series Semiconductor Termaline Coaxial Load Resistor
Connecting RF
Power
After installing the load, the RF transmission line can be attached
using standard coaxial line coupling kits.
WARNING
Never attempt to connect or disconnect RF equipment from the
transmission line while RF power is being applied.
Leaking RF energy is a potential health hazard.
“QC” Connector Coupling: Use 50 ohm coaxial cable such as
RG-218/U or -220/U (-17A or -19A), appropriate for the frequency and
power level of operation. Use a cable connector which will mate with
the one on the load.
8
Chapter 4 Operating Instructions
Normal Operation Bird 8860 series loads have no indicators or operating controls. They
require no special operating procedures or surveillance when their
performance limits are not exceeded. Follow the instructions for the
specific generator equipment.
Operation Under
Abnormal
Conditions
Shutdown These loads are passive devices, so have no way of being turned off.
Emergency
Shutdown
The load can be subjected to moderate overloads for short periods. If
this is likely, make sure the interlock is properly connected to prevent
damage to the load.
Turn off RF power at the source.
WARNING
Never attempt to connect or disconnect RF equipment from the
transmission line while RF power is being applied.
Leaking RF energy is a potential health hazard.
Turn off RF power at the source.
If the interlock thermoswitch is properly connected, RF power will be
automatically turned off when the coolant temperature reaches an
unsafe level.
9
Bird 8860 Series Semiconductor Termaline Coaxial Load Resistor
10
Troubleshooting
Chapter 5 Maintenance
This chapter covers cleaning, inspection, trouble-shooting, and
specifications for the Bird 8860 series loads.
WARNING
Never attempt to connect or disconnect RF equipment from the
transmission line while RF power is being applied.
Leaking RF energy is a potential health hazard.
WARNING
Disconnect the unit from all power sources before servicing.
The unit may be energized from multiple sources.
The potential for electric shock exists.
The table below contains troubleshooting information for problems
which can occur during normal operation. This manual cannot list all
malfunctions that may occur, or their corrective actions. If a problem
is not listed or is not corrected by the listed actions, notify a qualified
service center.
PROBLEM POSSIBLE CAUSE CORRECTION
Overheating
radiator
Leaking coolant Loose clamping band Tighten the clamping band
RF power too high Lower RF power
(See “Specifications” on page 16 for
maximum RF power)
Coolant level too low Check the coolant level. Add coolant if
necessary
(See “Coolant Level” on page 13)
Coolant degraded Replace the coolant
(See “Coolant Level” on page 13)
Faulty resistor Replace the resistor
(See “Load Resistor” on page 14)
Defective or improperly
installed O-ring
Replace the O-ring
(See “Load Resistor” on page 14)
11
Bird 8860 Series Semiconductor Termaline Coaxial Load Resistor
PROBLEM POSSIBLE CAUSE CORRECTION
High or low dc
resistance
Loose RF input connector Tighten connector
Faulty RF input connector Replace connector
(See “RF Connector” on page 14)
Faulty resistor Replace the resistor
(See “Load Resistor” on page 14)
Maintenance
Cleaning Wipe the load free of dust and dirt when necessary. Excessive dust on
the cooling fins will interfere with heat dissipation. Clean the RF
connector, both metallic and insulating surfaces, with a dry, nonresidue forming solvent.
Inspection Inspect the unit every six months. Check for coolant leakage around
the clamping band and the thermoswitch. Also check for corrosion.
DC Resistance Measuring the dc resistance between the inner and outer conductors
of the RF connector shows changes in the load over time, a good check
of the load resistor’s condition. Under normal operating conditions,
the resistor should provide at least 5,000 hours of operation before
requiring any additional service. DC resistance tracking must start
before the load is put into service, and should be measured annually.
Figure 5
Measuring
Resistance
Perform the following steps and record the value for future
comparison. Make sure that you have an ohmmeter with an accuracy
of ±1% at 50 ohms and that the load temperature is between 20 and
25 °C (68 to 77 °F) before starting.
WARNING
Never attempt to connect or disconnect RF equipment from the
transmission line while RF power is being applied.
Leaking RF energy is a potential health hazard.
12
1. Turn off the RF power and interlock circuitry.
2. Disconnect the RF line.
3. Connect the multimeter test leads to the center and outer
conductor of the load resistor (see
Figure 5).
4. Compare the measured value with the previous measurement and
with the baseline resistance, measured when the load was put
into service. If the new value differs from either of these by more
than 1 ohm this could indicate a failing resistor.
Coolant Level Coolant lifetime will vary greatly depending on the operating
temperature. For heavy use (full RF power for long times, high
ambient temperature), check the coolant every 500 hours. If the load
has only had light duty (fraction of full power, low temperature), then
inspection may only be necessary every 2,000 hours.
WARNING
Disconnect the unit from all power sources before servicing.
The unit may be energized from multiple sources.
The potential for electric shock exists.
Maintenance
+ NOTE: Correct any coolant leakage before inspection. (See
“Troubleshooting” on page 11)
To inspect the coolant:
y Remove the load resistor (Refer to “Load Resistor” on page 18).
CAUTION
Use only Bird coolant, P/N 5-1070, to prevent damage to the load.
y The coolant should be clear, with a faint yellow tinge, and have a
slightly sweet smell. If it is black with a burnt or acrid smell,
drain it and add about 1.5 gal (5.7 L) of coolant.
y With the load still on end, the coolant level should be 3
below the top surface of the resistor assembly mounting ring, at
ambient temperature. Add coolant if necessary.
5
⁄
" (92 mm)
8
13
Bird 8860 Series Semiconductor Termaline Coaxial Load Resistor
Repair
WARNING
Disconnect the unit from all power sources before servicing.
The unit may be energized from multiple sources.
The potential for electric shock exists.
RF Connector The 8865SC13 has a Bird “QC” connector which allows easy changing
of the RF connector. This does not disturb the coolant seal or affect
the electrical continuity of the load. To change the connector:
y Remove the four screws at the corners of the RF connector.
y Pull the connector straight out.
y Push the new connector in. Make sure that the center pin on the
connector is properly seated in the mating socket on the load.
y Replace the screws.
+ NOTE: If not using the LC connector normally supplied, the
frequency and power must be limited to the capabilities of the
connector.
Load Resistor To change the load resistor assembly:
1. Remove the vent plug and install the shipping plug.
2. Supporting the unit to prevent damage to the interlock, stand it
on its back with the connector end up. In this position there is no
danger of the coolant pouring out through the resistor hole.
3. Unscrew and remove the clamping band.
4. Lift the load resistor assembly out of the tank and allow any
coolant to drip back into the tank.
5. The O-Ring should be free of twists and positioned evenly around
the flange of the resistor housing. If the O-ring shows signs of
deterioration (e.g. is no longer pliable or has surface cracks)
replace it.
6. Replace the entire load resistor assembly. It cannot be further
disassembled.
14
7. Put the clamping band in place and tighten it.
8. Remove the shipping plug and install the vent plug.
Storage and Shipment
Cover the load before storing to keep out dust and dirt. It is not
necessary to install the shipping plug. Store in a dry, dust-free
environment where the ambient temperature will remain between
–40 and +45 °C (–40 to +113 °F).
To ship the load, take the following precautions:
y Remove the vent plug and replace it with the shipping plug. Wrap
the vent plug with padding and tape it to the side of the load for
protection.
+ NOTE: With the shipping plug installed, it is not necessary to
empty out the coolant.
y Wrap the connector in padding.
y Pack and brace the load in a sturdy wooden crate for shipment.
Maintenance
Customer Service
Any maintenance procedure beyond the scope of those provided in
this chapter should be referred to a qualified service center.
If you need to return the unit for any reason, contact the Bird Service
Center for a return authorization. All instruments returned must be
shipped prepaid and to the attention of Bird Service Center.
Bird Service Center
30303 Aurora Road
Cleveland (Solon), OH 44139-2794
Phone: (440) 519-2298
Fax: (440) 519-2326
For the location of the Sales Office nearest you, give us a call or visit
our Web site at:
http://www.bird-electronic.com
15
Bird 8860 Series Semiconductor Termaline Coaxial Load Resistor
Specifications
Frequency Range
Power Rating
Impedance, Nominal
VSWR
VSWR Stability
Stability Frequency
Connector
Interlock Thermoswitch
(Optional)
Thermoswitch Rating
115 Vac
230 Vac
Temperature, Operating
Temperature, Storage
Altitude
*
Humidity
dc – 28 MHz
1000 W continuous duty
50 ohms
1.1 max
< 0.1 dB, from 0 to 100% rated power
at stability frequency
13.56 MHz ± 10 kHz
“QC” Type, Female LC normally supplied
Normally closed. Opens at 236 °C (457 °F)
10 A
5 A
+5 to +40 °C (+41 to +104 °F)
– 40 to +45 °C (– 40 to +113 °F)
1520 m (5000 ft.)
95% noncondensing max
Cooling method
Dimensions
Weight, Nominal
Finish
* Derate RF power by 250 W for every 305m (1,000 ft.) above 1,520m (5,000 ft.)
Oil dielectric and convection currents
17.5" L x 7.5" W x 13
(445 x 190 x 334 mm)
27.8 lb. (12.6 kg)
Black Epoxy Resin
1
⁄
8
" H
16
Replacement Parts
DESCRIPTION QTY PART NUMBER
RF Load Resistor 1 8890-060
Resistor O-Ring 1 5-230
Clamping Band Assembly 1 2430-055
Maintenance
Plug
Vent
Shipping
Overtemp Thermoswitch 1 8890-008
Coolant, 1.5 gal (5.7 liter) 1 5-1070-3
Radiator Assembly 1 8860-002-2
Access Plug 3/4"-14 Hex Socket 1 5020-103
1
2450-094
2450-049
Available “QC” Type Connectors
Connector Part
Number
BNC-Female 4240-125 LT-Female 4240-018 Mini UHF-Female 4240-346
BNC-Male 4240-132 LT-Male 4240-012 UHF-Female 4240-050
C-Female 4240-100 N-Female 4240-062 UHF-Male 4240-179
C-Male 4240-110 N-Male 4240-063 1-5/8” EIA Fixed 4240-096
HN-Female 4240-268 SC-Female 4240-090 1-5/8” EIA Swivel 4240-208
Connector Part
Number
Connector Part
Number
HN-Male 4240-278 SMA-Female 4240-336 7/8” EIA 4240-002
LC-Female
LC-Male 4240-025 7/16 Jack, IEC
Open Term.
# 10-32 Nut
* Normally supplied
*
4240-031 SMA-Male 4240-334 TNC-Female 4240-156
4240-344 TNC-Male 4240-160
Type 169-4
4240-080 7/16 Plug, IEC
Type 169-4
4240-363
17
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
specified, from date of shipment and to conform to applicable specifications,
drawings, 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. Routine (regularly required) calibration is not covered under this
limited warranty. 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 manufacturer’s
warranty to Seller.
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, INCLUDING
WARRANTIES OF MERCHANTABILITY AND FITNESS, AND NO PERSON
IS AUTHORIZED TO ASSUME FOR SELLER ANY OBLIGATION OR
LIABILITY NOT STRICTLY IN ACCORDANCE WITH THE FOREGOING.
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