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Termaline® Load Resistor

5

Flow Switch (Optional)

The ports of the flow switch are 3/4 inch NPT Female. The direction of flow is marked on the casting of the flow tube 
and on the operating head. Observe carefully, opposite connection will restrict the water flow and cause load 
failure. 

The flow switch may be connected to the inlet or the outlet side of the load, preferably as close to the load as 
possible. Be certain the flow through the switch is in the correct direction. Connect with a 1/2 inch NPT Nipple and a 
1/2 to 3/4 inch bushing, Bird P/N 5-489-1 and 5-490-1, or connect by hose or pipes. In either case, the flow switch 
should not be over 20 feet from the load. Alternatively, attach hose to switch with a 3/4 inch hose nipple, Bird P/N 
5-903.

Do not connect flow switch leads at this time. 

Turn on the water flow and check the system for leaks and proper operation.

Control Box (Optional Item)

The 

wiring center

 and remaining elements of the control system are contained in the control box. This includes a 

terminal strip and three BX cable clamps for the input connections, a lamp, and a delay timer. Only wiring material 
is needed for connecting the flow switch to the control box. The control unit operates on 115 VAC, P/N 8750-101-1.

The lamp on top of the box is a safe operation indicator; it lights only when AC power is on and an adequate water 
supply is flowing. After the pilot lamp lights, a 12 ±2 second time delay allows sufficient time for the water flow to 
stabilize before closing the transmitter interlock. 

The control box is mounted by means of four 1/4 inch holes on a 5 x 5 inch (127 x 127 mm) square on the back. 
Locate the box for the best view of the lamp and for easy attachment of the BX cable and wiring. 

Connect the control leads as follows:

Water Flow switch leads to terminals 3 and 5.

Interlock Switch leads to terminals 6 and 7.

AC power source to terminals 2 and 3.

Preoperational Checkout

Before attempting to operate the RF load, whether under test or actual operating conditions, TEST the complete 
water system and INTERLOCK CONTROL as follows:
1.

Make sure the AC and transmitter interlock power are OFF.

2.

Connect an ohmmeter across terminals six and seven (interlock).

3.

Turn the AC power on.

4.

Turn the water supply on.

5.

Note when the water flow switch operates (audible click),

Note:

 

In not less than 10 seconds (12 ±2) the ohmmeter should signify a closed condition across termi-

nals six and seven, indicating operation of the time delay switch.

6.

Ensure water flow from the OUTLET connection of load is at least 9 gpm (34 lpm) at 5° C (41° F) through 12 gpm 
(45.4 lpm) at 60° C (140° F).

Note:

 

As a precautionary measure, the Preoperational Checkout should be performed each time the 

load is put into service.

Содержание Termaline 8792 Series

Страница 1: ...Load Resistor Series 8792 Operation Manual Copyright 2017 by Bird Technologies Inc Instruction Book Part Number 920 8792 93 Rev A Termaline and Thruline are registered trademarks of Bird Electronic Co...

Страница 2: ...to remove the RF transmission line while RF power is present WARNING Do Not Service Or Adjust Alone Under no circumstances should any person reach into an enclosure for the purpose of service or adju...

Страница 3: ...ntion 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 fol...

Страница 4: ...page 10 WARNING Never attempt to disconnect RF equipment from the transmission line while RF power is being applied Leaking HF energy is a potential health hazard WARNING The resistor used in this loa...

Страница 5: ...upted full water flow is more critical than temperature CAUTION Verify cooling liquid is flowing through the load before RF power is applied and ensure the cooling liquid supply is not interrupted whi...

Страница 6: ...SEGURIDAD DEL INSTRUMENTO BENUTZUNG WIRD DAS GER T AUF ANDERE WEISE VERWENDET ALS VOM HERSTELLER BESCHRIEBEN KANN DIE GER TESICHERHEIT BEEINTR CHTIGT WERDEN UTILISATION TOUTE UTILISATION DE CET INSTRU...

Страница 7: ...S GER TES GELTEN NUR F R GESCHULTES FACHPERSONAL ZUR VERMEIDUNG GEF HRLICHE ELEKTRISCHE SCHOCKS SIND WARTUNGSARBEITEN AUSSCHLIE LICH VON QUALIFIZIERTEM SERVICEPERSONAL DURCHZUF HREN ENTRENTIEN L EMPLO...

Страница 8: ...OPERATING BRANCHER LE VERROUILLAGE L METTEUR AVANT EMPLOI CONECTE EL INTERBLOQUEO AL TRANSMISOR ANTES DE LA OPERACION VOR INBETRIEBNAHME VERRIEGELUNG AM SENDER ANSCHLIESSEN PRIMA DI METTERE IN FUNZION...

Страница 9: ...d revision on the title page Terminology There are some unique terms used throughout this literature They are defined here to clarify any misunderstanding Introduction Describes the features of the lo...

Страница 10: ...2 Cooling Water for Models 8792 3 Flow Interlock Control Circuit Optional 3 Chapter 3 Installation 4 Load Resistor Connection 4 Water Line Attachment 4 Cooling Water Quality 4 Flow Switch Optional 5 C...

Страница 11: ...cing Fractured Resistor 12 Reassembling the Unit 12 Replacing the RF Connector 14 Replacing the Water Flow Switch 14 Replacing the Time Delay Relay 15 Replacing the Control Box Lamp 15 Storing 16 Ship...

Страница 12: ...ive Control System is available as optional equipment When properly installed this system protects the load by shutting off the RF power when water flow is too low or interrupted Discussions of the fl...

Страница 13: ...the rear The dielectric characteristics and distinctive design of these enclosures provide a very accurate 50 ohm termination over the specified frequency range of this load 1000 Hz to 800 MHz The ab...

Страница 14: ...on is necessary because dissipation of the heat generated by the RF power absorption is critically dependent upon maintaining the required minimum water flow rate regardless of inlet water temperature...

Страница 15: ...te Do not disturb the socket head cap screws that join the connector section to the main housing 5 Install water inlet and outlet connections See Water Line Attachment on page 4 Water Line Attachment...

Страница 16: ...e box is a safe operation indicator it lights only when AC power is on and an adequate water supply is flowing After the pilot lamp lights a 12 2 second time delay allows sufficient time for the water...

Страница 17: ...utdown Procedure 1 Turn off the RF Power to the load 2 Wait at least one minute to allow the resistor substrate time to cool 3 Turn the interlock and AC power off if the load is equipped with an inter...

Страница 18: ...oad Installation and operation of the wattmeter is covered in the Thruline Wattmeter Instruction Book Note Select a wattmeter type appropriate to the input connector of the load resistor Consult the B...

Страница 19: ...ses and remedies Use this chart as a guide when analyzing symptoms Cleaning Outside Surface The outside surface of these loads should be wiped free of dust and dirt when necessary Periodically wipe th...

Страница 20: ...Use low resistance leads preferably a short piece of 50 ohm coaxial cable fitted with an appropriate connector or alligator clips Temperature of the load should be stabilized between 20 C to 25 C 68 F...

Страница 21: ...Set the load on end with RF Connector down 6 Remove the water chamber 1 by unscrewing it in a counterclockwise direction Note A strap wrench and a 3 8 to 1 2 inch rod are useful to overcome the initia...

Страница 22: ...ote There is no advantage in separating the front and second housing sections These are removed as an entire unit by removing the six 1 4 20 x 1 inch socket head cap screws on the flange of the front...

Страница 23: ...he resistor fitting 22 be sure it is a very snug fit and requires a moderate force to push the resistor into the fitting This fit must not be loose and yet not excessively tight If the resistor is loo...

Страница 24: ...Termaline Load Resistor 13 Figure 3 RF Load Midsection Figure 4 RF input Assembly Exploded View...

Страница 25: ...the fitting to hold the resistor fitting 22 5 Replace the center conductor assembly by gently manipulating the assembly until it is thoroughly seated in place 6 Reassemble the RF Connector assembly by...

Страница 26: ...of the socket 6 Replace the relay by reversing the procedure above Note The socket is an ordinary octal type When inserting the relay rotate the cartridge carefully to align the center post nub in the...

Страница 27: ...shipping carton for reshipment 4 Pad the container with sufficient padding to avoid shock damage 5 Seal the container securely Customer Service Any maintenance or service procedure beyond the scope o...

Страница 28: ...to 60 C 41 F to 140 F AC Power Required 115 V 60 Hz with optional items only Minimum Water Flow Rate 9 GPM 34 lpm at 5 C 41 F 12 GPM 45 4 lpm at 6O C 140 F Water Connection 3 4 standard hose thread We...

Страница 29: ...1 14 1 Cone point socket hd set screw front and second sect 10 32 x 1 4 inch standard 15 1 Outer resistor cap seal O Ring 5 1128 17 1 Flow switch 5 898 7 18 1 Flow switch bushing 5 490 14 19 1 Front s...

Страница 30: ...ry such claim for breach of these warranties shall be deemed to be waived by Buyer unless made in writ ing within ten days from the date of discovery of the defect The above warranties shall not exten...

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