Wattcher® monitor/alarm Models 3170B ©Copyright 2011 by Bird Electronic Corporation Instruction Book Part Number 920-3170AS Rev.
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. WARNING Keep Away From Live Circuits Operating Personnel must at all times observe general safety precautions.
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 Do not use electrically conductive tools for calibration when the front panel is removed. Damage to the unit and or the possibility of electrical shock exists. See page 10. WARNING Become thoroughly familiar with modern methods of resuscitation before working near high voltage sources. See page 15. WARNING Shock hazard.
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 Be sure the 115/230 voltage selector switch on the rear panel is set to the proper line voltage before AC power is applied. See page 9. CAUTION Do not bend this contact finger when cleaning. The position of this contact is some what critical.
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.
SERVICE 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 DESCARGAS ELÉCTRICAS, NO REALICE NINGÚN SERVICIO A MENOS QUE ESTÉ CAPACITADO PARA HACERIO. WARTUNG ANWEISUNGEN FÜR DIE WARTUNG DES GERÄTES GELTEN NUR FÜR GESCHULTES FACHPERSONAL.
CONNECT INTERLOCK TO TRANSMITTER BEFORE OPERATING. BRANCHER LE VERROUILLAGE À L'ÉMETTEUR AVANT EMPLOI. CONECTE EL INTERBLOQUEO AL TRANSMISOR ANTES DE LA OPERACION. VOR INBETRIEBNAHME VERRIEGELUNG AM SENDER ANSCHLIESSEN. PRIMA DI METTERE IN FUNZIONE L'APPARECCHIO, COLLEGARE IL DISPOSITIVO DI BLOCCO AL TRASMETTITORE.
About This Manual This manual covers the operating and maintenance instructions for the following models: 3170B 3170B400 3171B 3171B020 Changes to this Manual We have made every effort to ensure this manual is accurate. If you discover any errors, or if you have suggestions for improving this manual, please send your comments to our Solon, Ohio factory. This manual may be periodically updated. When inquiring about updates to this manual refer to the part number and revision on the title page.
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Table of Contents Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i Warning Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ii Caution Statements . . . . . . . . . . . . . . . . .
Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Adjusting the Element Wiper Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Fuse Drawer/Fuse Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Changing Fuse Drawer for 230V Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1 Introduction General This publication refers to the Model 3170B which is a member of the Bird Model 3170B Series of High Speed Wattcher RF Monitors. Models included in the series are listed in Table 1-1. All models will generally be referred to as a Wattcher unit through out this manual. The information in this instruction book pertains to all models except noted differences referred to in the text and in the "Difference Data Sheet" on page 29.
Purpose and Function The Model 3170B Series High Speed Wattcher unit is a two channel power monitoring system for use in 50 ohm coaxial transmission lines. Adjustable set points allow user to preset maximum reflected and minimum forward power trip points. Activated audible/visual alarms indicate an erroneous condition present on the transmission line. Corrective action can then be followed to either protect transmission equipment or restore transmission line to operational characteristics.
Functional Description Enclosures The Wattcher Monitor’s internal circuitry is enclosed in an aluminum housing. This housing is mounted to a standard 19-inch panel for rack mount applications. Front Panel Figure 1 Front Panel 3 2 1 Table 1-2 1 Alarm/Setpoint Faceplate 2 Reset 3 Forward Monitor 4 Reflected Monitor 4 Front Panel If forward or reflected power set points are exceeded an audible alarm is sounded. The alarm works in conjuction with error status indicator reflecting failure conditions.
Figure 2 Rear Panel 1 4 2 Table 1-3 4 6 7 Rear Panel 1 AC Receptacle 2 AC Line Fuse 3 Line Voltage Selector Switch Power/Alarm/Remote Terminal Strip 4 5 3 5 Remote Meter Connections 6 RF Power Input Connections (from line section) 7 Meter Connections Provides a means of supplying AC line power to Wattcher control unit. Slow-blow fuse, provides circuit protection from excessive surge inline power or in the event of component failure. Determines line voltage operation (115 or 230VAC).
Figure 3 Models 3170B and 3170B400 2-1/4” 5-7/32” (57mm) (133mm) 1/4” (6mm) 1-31/64” (38mm) 18-5/32” (461mm) 19” (483mm) RF Input Connector Line Section RF Output Connector AC Receptacle Meters 6-7/16” (164mm) 5
Figure 4 Models 3171B and 3171B020 2-1/4” 5-7/32” (57mm) (133mm) 1/4” (6mm) 1-31/64” (38mm) 18-5/32” (461mm) 19” (483mm) Meters AC Receptacle Remote Line Section ~ RF Output Connector RFL FWD RF Input Connector 6-7/16” (164mm) 6
Chapter 2 Theory of Operation Input Signal Direct current signals representing operating power levels are brought into the RF monitor from the sensing elements through the rear panel jacks labeled RF Power Input Forward and Reflected. These currents are shunted to ground through 1400 ohm resistors. The voltage developed across these resistors is amplified by a pair of operational amplifiers to approximately one volt (meter full scale).
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Chapter 3 Preparation for Use General The series 3170B High-Speed Wattcher RF Monitoring System was designed for indoor use. This section contains information on unpacking and inspection; and preparing the Wattcher Unit for use. Unpacking and Inspection 1. 2. 3. Carefully inspect shipping container for signs of damage. If damage is noticed, do not unpack the unit. Immediately notify the shipping carrier and Bird Electronic Corporation. If container is not damaged, unpack the unit.
Models 3171B and 3171B020 1. 2. 3. Insert the line section in the coaxial RF coaxial transmission line. Connect the DC cable to the line section. Run the DC cable to the rack console unit. Note: If the back of the unit is not accessible from the rear of the rack mount, all connections to the unit must be made before the panel is secured in place. 4. Ensure that the 115/230 line voltage switch is in the correct position for the voltage supplied.
Figure 6 Controls and Indicators Switch Calibrate LED’s Operate 1 1 2 3 4 5 6 7 2 3 4 5 6 7 Calibrate/Operate Switch Forward Reference Adjustment Potentiometer Reflected Reference Adjustment Potentiometer Forward Set Point Potentiometer Reflected Set Point Potentiometer Confirm Set Point Potentiometer Forward Monitor Active Delay Dip Switch Adjust Set-Points • 1. Set the CALIBRATE/OPERATE switch to the CALIBRATE position (to the left). 2.
Active Forward Monitor Setup Note: Internal circuitry sets Active Forward Monitor (AFM) input to a high state. This inhibits monitoring of forward power on transmission line. To monitor forward power, follow the steps below. 1. Connect AFM input to ground by hardwiring terminal strip position 10 (AFM input) to position 7 (ground). 2. Select the appropriate delay (see Table 1-4).
Chapter 4 Operating Instructions General When the unit is installed and connected to a transmitter for remote monitoring, metering, or external alarms and functions as your installation requires, operator attention is not required. The equipment will completely monitor a transmitter’s operation. The only time operating personnel will be necessary is to reset the unit if it has not been wired for automatic or remote reset.
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Chapter 5 Maintenance Safety Considerations WARNING Become thoroughly familiar with modern methods of resuscitation before working near high voltage sources. WARNING Shock hazard. Always turn off AC power before removing any equipment panels. Preventive Maintenance Note: Preventive maintenance is limited to cleaning the unit and connectors. WARNING Disconnect this unit from AC power source before any disassembly for cleaning, repair or replacement procedures. The potential for electrical shock exists.
Customer Service Any maintenance or service procedure beyond the scope of those in this chapter should be referred to a qualified service center. If the unit needs to be returned for any reason, request an RMA through the Bird Technologies website. All instruments returned must be shipped prepaid and to the attention of the RMA number. Bird Service Center 30303 Aurora Road Cleveland (Solon), Ohio 44139-2794 Fax: (440) 248-5426 E-mail: bsc@bird-technologies.
Troubleshooting Locate the problem, review the possible cause, and perform the corrective action listed. Note: Only those functions within the scope of normal maintenance are listed. This manual can not list all malfunctions that may occur, or corrective actions. If a malfunction is not listed or not corrected by the listed corrective actions, notify a qualified service center.
PROBLEM CAUSE AREAS TO CHECK / CORRECTION Reflected meter pointer max out with RF power applied. Meter/Line section cables reversed. Connect reflected cable to proper BNC connector on rear panel. High VSWR or reflected power Bad load or poor connectors. Replace load or connectors. Shorted or open transmission line. Have transmission line serviced. Foreign material in the line section or in RF connector bodies. Remove foreign material. See “Cleaning” on page 15.
4. Ensure the profile of the element contact is visible when viewing the element socket from the top of the socket bore. Note: If the contact is accidently moved too far into the element bore, the element will not slide into the socket. Move the contact back into the recessed area and repeat the process.
Replacing Blown Fuse Note: For either 115 or 230 Volt Operation. 1. 2. Depress the release tabs on both sides of the fuse drawer. Replace blown fuse. Fuse Operating Voltage 115 V 230 V Bird PN 5A2257-14 5A2257-11 3. 4. Type 5x20 mm, Slo-Blo, T630 mA 5x20 mm, Slo-Blo, T315 mA Insert fuse drawer into housing cavity. Push until release tabs snap into place.
Figure 11 Replacing Fuse for External DC Input Voltage 4-40x3/16 Phillips Pan Head Screws Cover Fuse 3AG Fast Acting .5 A 4-40x3/16 Phillips Pan Head Screws Meter Replacement If the meters should become defective and require replacement, proceed as outlined in the following steps: 1. Observe the connections of the meter leads. 2. Disconnect the leads. Note: This will insure the correct polarity in reassembly. 3. 4. 5. Loosen the clamp screw on the sides of the meter until the clamp is released.
Replacement Parts List Qty 1 2 1 1 2 2 2 1 2 Description Part Number AC power fuse 115V, 5x20 mm, Slo-Blo, T630 mA 230V, 5x20 mm, Slo-Blo, T315 mA DC power fuse, 3 AG, 1/2 A Power cord, 115/230 VAC Cable assembly (Line Section) Meter cable assembly Meter Models 3170B, 3170B400 Model 3171B Model 3171B020 Line section assembly (Model 3170B and 3170B400 only) Bezel kit (for all meters) 5A2257-14 5A2257-11 5-721-2 4421-055 3170-058-1 3170B110 2150A015-1 2150A086-1 2150A093-1 4522-002-7 2150A015-2 Line Sec
Specifications Impedance 50 Ohms nominal Power Range Models 3170B, 3170B400 Model 3171B Model 3171B020. 100 mW to 10 kW full scale 250 W to 100 kW full scale 300 W to 60 kW full scale Indicated Power Accuracy 5% of full scale Alarm Accuracy 5% of full scale Response Time 25 μsec maximum Activate Forward Monitor (Adjustable Delay) Models 3170B, 3171B, & 3171B020 3170B400 71 μsec to 50 ms nominal 7.
Element Tables The following tables are used to determine the part numbers of elements required based on line section, power, and frequency ranges. Table 1-6 should be used to determine which element table to use, based on the model. Note: Table 1-7 through Table 1-18, page 27 are numbered consecutively for convenience. The table heading corresponds to the table heading in the Bird catalog which is the common reference for element tables.
Table 1-9 Low Frequency Elements Power Range (Watts) 1000 2500 5000 10000 Table 1-10 Frequency Bands (Mhz) .45 - 2.5 1000P 2500P 5000P 10000P Low Power Elements 100 mW 250 mW Frequency Cat. No Frequency Cat.
Table 1-11 Power Range (Watts) 100 W 250 W 500 W Frequency 2 - 30 25- 60 50 - 125 100 - 250 200 - 500 400 - 1000 --500H12 100A12 250A12 500A12 100B12 250B12 500B12 100C12 250C12 500C12 100D12 250D12 500D12 100E12 250E12 500E12 Table 1-12 Power Range (Watts) Low Frequency Elements High Frequency Elements Entire Table (8% FS) Milliwatt Elements Frequency Bands (Mhz) 1 905 1260 1J 1100 1800 1K 1700 2200 1L 2200 2300 1M 2.5 2.5 J 2.5 K 2.5 L 2.
Table 1-15 Power Range 3-1/8” AA Standard Elements 30μA Frequency 100 W 250 W 500 W 1000 W 2500 W 5000 W 10 kW 25 kW 50 kW 100 kW 2 - 30 --500H32 1000H32 2500H32 5000H32 10KH32 25KH32 50KH32 100KH32 Table 1-16 3-1/8” BB Standard Elements 30μA Power Range 600 W 1500 W 3000 W 6000 W 15 kW 30 kW Table 1-17 Power Range (Watts) 50 - 125 100B32 250B32 500B32 1000B32 2500B32 5000B32 10KB32 25KB32 50KB32 -- 100 - 250 100C32 250C32 500C32 1000C32 2500C32 5000C32 10KC32 25KC32 50KC32 -- 400 - 1000 100E32 25
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Appendix 1 Difference Data Sheet Note: Table A-1 is used to outline the differences between various models. Table 1-19 Differences Between Models Line Section Mount Model Front Panel 3170B Meter Scale AFM Delay Adjustment Range External Watts kilowatts 71 μs 25/50/100 5/10/25 15/30/60 to 50 ms 3170B400 3171B 3171B020 7.
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Appendix 3 User Applications and Wiring This section is a collection of user specific applications and the wiring information required to activate them.
Active Forward Monitor (AFM) Input Wiring concept examples for activating the AFM circuit are shown below. These can be used for remote onsite or offsite manual or automatic activation. Dry Contact Closure Closure will be from terminal 10 to case ground, terminal 7, in any convenient form, e.g. by an extra set of manual contacts on the transmitter keying relay or a separate remote switch.
Confirm Output For visual confirmation of transmitter “ON” see circuit below. Relay Control Relay control for greater current requirements. Connect the external relay coil, noting the polarity to terminal 5 for +5V output and to terminal 9. Confirm output. Figure 14 Confirm Output Relay Control LED Indicator Simple local or remote light emitting diode indicator, that requires no more than 1.5A. Resistors value may vary based on current requirements of chosen LED.
Reset Input A remote reset could be used in case of false alarm or a brief disturbance has tripped the Wattcher Monitor but left the transmission intact. Remote Contact Reset This option allows reset onsite, but remote from the Wattcher unit. Terminal 8, Reset, is active low and will cause a reset when the switch is closed, making a connection to terminal 7, ground. One or several momentary contact, normally open, switches can be connected in series for reset from various locations.
DC Power Supply Connections A DC power supply can be connected to allow for mobile operation of the Wattcher unit. The positive terminal of the DC power supply must be connected to Terminal 1. The negative terminal must be connected to terminal 2. The minimum DC voltage required for operation is +12.7Vdc. The maximum DC voltage allowable is +16Vdc. The maximum current draw for this range is 400mA.
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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.
