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Summary of Contents for ENDEVCO 6634C
- Page 1 MODEL 6634C VIBRATION AMPLIFIER INSTRUCTION MANUAL San Juan Capistrano, California, U.S.A. IM6634C Revision G April 9, 2007...
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Page 2: Table Of Contents
ENDEVCO 6634C INSTRUCTION MANUAL TABLE OF CONTENTS SECTION 1: INTRODUCTION PAGE INTRODUCTION CONFIGURATION ELEMENTARY THEORY PERFORMANCE DATA AND SPECIFICATIONS SECTION 2: UNPACKING AND CHECKOUT INTRODUCTION UNPACK INSTALL OPTION BOARDS SET JUMPERS POWER UP CHECKING OUT UNIT CONNECTIONS ACCESSORY LIST JUMPER CONFIGURATION... - Page 3 INTERFACE TO 6726 TRACKING FILTER INTERFACE WITH 6634A INSTALLATIONS LIST OF ILLUSTRATIONS MODEL 6634C INPUT/OUTPUT DIAGRAM SIMPLIFIED BLOCK DIAGRAM OF THE MODEL 6634C WIRING DIAGRAM FOR INPUT AND OUTPUT CONNECTORS SERIAL INTERFACE CABLE CONNECTOR PINOUTS INPUT/OUTPUT CONNECTOR PINOUTS JUMPER LOCATIONS ON MAIN BOARD...
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Page 4: Introduction
The 6634C is a line-powered, single-channel instrument which may be used independently or up to 6 units may be mounted in an optional 19" rack (Endevco P/N 4948, 5" high). All signal and power connections are made at the rear panel of the unit. -
Page 5: Elementary Theory
RS-232 bus (optional), and which are set, verified, and monitored by an internal microprocessor. The ENDEVCO Model 6634C is a programmable signal conditioner providing a number of types of output, as well as a front panel digital display. - Page 6 ENDEVCO 6634C INSTRUCTION MANUAL Figure 1 -2 shows a simplified circuit of the Model 6634C. The optional Serial Interface, Six-Pole Programmable Filter input (Model 6634C-XSF) are shown installed. INPUTS The Model 6634C accepts inputs from: • External Calibration Source •...
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Page 7: Performance Data And Specifications
(o pt io n al) MODE L 35843 RS-232 BUS Figure 1-2: Simplified block diagram of the Model 6634C. Settings are implemented by keyboard inputs or through software commands over the RS-232 bus. PERFORMANCE DATA AND SPECIFICATIONS A Data Sheet and set of current Specifications are provided which define the expected limits of performance for the Model 6634C. -
Page 8: Section 2: Unpacking And Checkout
Unwrap the Model 6634C and set on a level, firmly supported surface. The unit contains a built-in power supply. No cooling fan is required. There is no power switch, and the unit derives its power from the rear power cable connector. -
Page 9: Set Jumpers
DC Full Scale Output to 1V, 5V, or 10V, and W5 sets the AC Full Scale Output to 1V, 5V, or 10V (refer to Section 3.3 for more information). W1 selects Velocity Coil or RCC input in Model 6634C-XSF only (refer to Section 3.2 for more information). - Page 10 ENDEVCO 6634C INSTRUCTION MANUAL LOCAL MODE In the LOCAL Mode, the front panel displays the vibration amplitude of the DC Output in a fixed decimal format (decimal point fixed by the selected full scale). The OUTPUT LEDs show the selected output in Engineering Units (AC Output unit = g, ips, or mils), and the type of indication on the DC Output (RMS, average, or peak [pk-pk for displacement]).
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Page 11: Connections
Transmit pin. No two 6634C’s can have the same RS-232 address (except Ø, see below). The address of each 6634C can be set from the front panel (in Local mode). Press <ENTER> then <3>. The front panel displays Adnn, where nn is the present address of the unit. - Page 12 Continue the Calibration procedure listed above for each 6634C channel installed in the rack (/SYS-CAL can be daisy chained to calibrate all 6634C units at the same time). If all channels Calibrate without errors, the system is fully calibrated and ready to operate. The operation command instructions are described in Section 3.
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Page 13: Wiring Diagram For Input And Output Connectors
ENDEVCO 6634C INSTRUCTION MANUAL (Fi xed, 50mV/g) MODEL 6634C (Fi xed, 100mV/ips) (Fixed , 100 or 200mV/mi l p .p) * ‘pin’ is g rounded at 6634C end Figure 2-1: Wiring diagram for input and output connectors. IM6634C Page 2-6... -
Page 14: Accessory List
P/N EJ584) pin connections are shown in Figure 2-2. Connect an input cable and transducer to the appropriate input connection on the rear panel of the Model 6634C enclosure. It is not necessary to connect output cabling at this time. -
Page 15: Jumper Configuration
ENDEVCO 6634C INSTRUCTION MANUAL OUTPUTS Note 1: "/" means Active Low Note 2: “*” indicates that proper jumper should be installed to enable external Accel, Vel, and/or Broadband inputs (refer to Figure 2-4). Figure 2-3: Input/Output Connector Pinouts JUMPER CONFIGURATION The figure 2-4 diagram shows how the W1 and W8 jumpers should be set for each type of input. -
Page 16: Jumper Locations On Main Board
ENDEVCO 6634C INSTRUCTION MANUAL MODEL 35840A R = ISOTRON V = VELOCITY DIFFERENTIAL DEFAULT SET-UP DRCC, ACCELERATION DRCC, VELOCITY Figure 2-4: Jumper Locations on Main Board IM6634C Page 2-9... -
Page 17: Section 3: Operating Instructions
The Model 6634C is controlled using the keyboard and display when operating in the default, Local Mode. When the 6634C is powered-up, it is in the LOCAL MODE, where the unit takes its instructions from the keyboard, and the vibration level is shown on the digital display. At power-up, all LEDs are illuminated for a few seconds. -
Page 18: Input Settings
Figure 3-1: Keyboard Diagram of Model 6634C. INPUT SETTINGS The Model 6634C can be set to accept inputs from a variety of transducers and can be set to the sensitivity of the transducer so that the outputs are normalized to engineering units. - Page 19 When using the DRCC acceleration output, the sensitivity of the transducer is multiplied by the gain of the DRCC and the product is divided by 10. The sensitivity of the 6634C should be set a factor of 10 lower than the transducer sensitivity times the DRCC gain.
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Page 20: Output And Display Settings
Pressing F.S. in the Normal Mode will cause the Digital Readout Indicator to flash the present Full Scale setting of the 6634C. At the same time, the Output Display LED flashes the engineering unit and the DC Output unit LED flashes "pk"... -
Page 21: Programmable Filter
Pressing IN/OUT in the Normal Mode will cause the Digital Readout Indicator to flash the present filter condition ("In" or "Out") of the 6634C. While the filter condition is being indicated, the ALARM and OUTPUT displays are off. If no filter is installed, the Digital Readout Indicator will flash "Err0", and the only keypress that will be accepted is ENTER. -
Page 22: Alarm
EXTERNAL FILTER To use the 6634C in the external filter mode, install filter between pin 2, “BB-OUT”, and pin 13, “BB-IN”, of the 25 pin Output connector. Move jumper W3 (internal to unit) from the 1-2 position to the 3-4 position. With W3 in the 3-4 position, either an external filter must be installed, or a jumper must be installed between pins 2 and 13 of the Output connector to complete the signal path. -
Page 23: External Calibration
REMOTE BUS ADDRESS SET If the Serial Interface Board, Model 35843 is installed, the address of each 6634C can be set from the front panel (in Local mode). Press <ENTER> then <3>. The front panel displays Adnn, where nn is the present address of the unit. -
Page 24: Section 4: Operation With Rs-232 Interface
OPERATION WITH RS-232 INTERFACE OVERVIEW AND COMMAND FORMAT With the optional Model 35843 Serial Interface Board, the Model 6634C can be controlled via the RS-232 interface bus by sending instructions that conform to the 6634C Command Syntax in accordance with the RS-232 protocol. - Page 25 ENDEVCO 6634C INSTRUCTION MANUAL MESSAGE PROTOCAL Data sent across the RS-232 bus to and from the Model 6634C shall conform to the format shown in Table 4-1. Byte 0 Byte 1 to 5 Byte 6 Description Remote/Local Command from Controller nnXXX CR,LF, or ";"...
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Page 26: Input Settings
INSTRUCTION MANUAL INPUT SETTINGS The Model 6634C can be remotely set to accept inputs from a variety of transducers and can be set to the sensitivity of the transducer so that the outputs are normalized to engineering units. When the 6634C is powered-up, it is in the LOCAL MODE, where the unit takes its instructions from the keyboard. At power-up, the input is set to the input type and input sensitivity from the last used setup, which was previously stored in non-volatile memory. -
Page 27: Output Settings
Set unit to displacement output mode If new output mode is successfully setup, no response will be provided by the 6634C. If a problem is encountered, and the unit is in the Listener/Talker mode, the error message E1XXXX "BEL", setup is not allowed will be provided by the 6634C. - Page 28 Set DC output mode to peak ("pk-pk" for displacement) If new DC output mode is successfully setup, n o response will be provided by the 6634C. If a problem is encountered, and the unit is in the Listener/Talker mode, the "setup is not allowed" error message E1XXXX "BEL", will be provided by the 6634C.
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Page 29: Programmable Filter
At power-up, the filter corner frequencies are set to the default settings which were previously stored in non-volatile memory. FILTER IN/OUT To remotely set the Filter (in the circuit or out of the circuit), send one of the following commands to the 6634C: F0XXXX ; Select filter out F1XXXX ;... - Page 30 (byte2)(byte3) E (byte4). If new filter cutoff frequency is successfully setup, no response will be provided by the 6634C. If a problem is encountered, and the unit is in Listener/Talker mode, one of the two error messages (E0XXXX "BEL", filter not installed or E1XXXX "BEL", setup is not allowed) will be provided by the 6634C.
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Page 31: Alarm
EXTERNAL FILTER To use the 6634C in the external filter mode, install filter between pin 2, “BB-OUT”, and pin 13, “BB-IN”, of the 25 pin Output connector. Move jumper W3 (internal to unit) from the 1-2 position to the 3-4 position. With W3 in the 3-4 position, either an external filter must be installed, or a jumper must be installed between pins 2 and 13 of the Output connector to complete the signal path. -
Page 32: External Calibration
To initiate the External Calibration process, send the following command to the 6634C: CXXXXX ; Calibrate system Allow 3 minutes for the calibration to be completed. If the calibration is successfully completed, the following response is provided by the 6634C (if the unit is in Listener/Talker mode): CXXXXX "BEL" Calibration successfully completed... -
Page 33: Store And Recall Setups
SETUP STATUS As described in Section 4.2 through 4.5, the setup status of the 6634C can be determined by replacing Byte 1 in a command with a question mark. For example, to determine the Input Type setting of the unit, send [T?XXXX ;] and the unit will respond with the question mark replaced by the appropriate Input Type number and the semicolon replaced by "ACK". - Page 34 DATA REQUEST The 6634C can be requested to output the current vibration level data over the RS-232 bus. The vibration data can be requested by sending the following query (after selecting the specific 6634C unit as Listener/Talker using the InnXXX; command): V?XXXX ;...
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Page 35: Ascii Character Set Table
ENDEVCO 6634C INSTRUCTION MANUAL ASCII CHARACTER SET TABLE ASCII EQUIVALENT FORMS ASCII EQUIVALENT FORMS ASCII EQUIVALENT FORMS CHAR BINARY OCT DEC HEX CHAR BINARY OCT DEC HEX CHAR BINARY 00000000 00101011 01010110 00000001 00101100 01010111 00000010 00101101 01011000 00000011 00101110... -
Page 36: Section 5: Maintenance
REPLACING FUSES Make certain that the correct fuse is installed for the power voltage selected. The Model 6634C has a 2 amp fuse. Fuse holder is located to the left of the power supply on the main board. (See Figure 5-1) If a fuse is blown, take steps to determine the cause. -
Page 37: Replacing Eproms
ENDEVCO 6634C INSTRUCTION MANUAL card. There are no user serviceable assemblies in the 6634C Vibration Amplifier. If a card is determined to be faulty, return it to ENDEVCO following the policy stated below. FACTORY SERVICE ENDEVCO maintains factory service for repair of all ENDEVCO instruments. To obtain repair or replacement of a... -
Page 38: Eprom Location On Main Board
ENDEVCO 6634C INSTRUCTION MANUAL POWER-UP After replacing the EPROM, follow the Power-Up procedure in Section 2. POWER SUPPL Y MODUL E COMPONENT SIDE FUSE Figure 5-1: EPROM Location on Main Board. IM6634C Page 5-3... -
Page 39: Appendix A: Detailed Theory Of Operation
DETAILED THEORY OF OPERATION AMPLIFICATION The ENDEVCO Model 6634C is a single-channel amplifier which provides a wide range of modes and gains. The ENDEVCO Model 6634C Vibration Amplifier is a programmable amplifier system composed of an Input Amplification Section, a Sensitivity Amplifier, a Filter Section (treated in Section A.3), and an Output Amplification (and integration) Section. -
Page 40: Rcc/Isotron Operation
High frequency response limits must also be considered when using long cable to couple an RCC or ISOTRON to the 6634C. The current that is available to drive a cable, the peak signal level, and the cable capacitance are all important and interrelated factors that determine frequency response of the coupling system. - Page 41 ENDEVCO 6634C INSTRUCTION MANUAL Figure A-1: Simplified block diagram of the amplification scheme of the Model 6634C. NOTE: See Figure 2-1 for connector and pin designations IM6634C Page A-3...
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Page 42: Simplified Schematic Of Rcc/Isotron Circuitry
ENDEVCO 6634C INSTRUCTION MANUAL REM OTE CHA RGE C ONVERTER M ODEL 6634C ACCEL EROMETER Figure A-2: Simplified Schematic of RCC/ISOTRON Circuitry. 1000 pF 2000 pF 3000 pF 5000 pF 10,000pF 20,000pF 30,000pF 50,000pF 100,000pF 0.01 100Hz 100,000 1000Hz Frequency->... -
Page 43: Signal Filtering
EXTERNAL FILTER To use the 6634C in the external filter mode, install filter between pin 2, “BB-OUT”, and pin 13, “BB-IN”, of the 25 pin Output connector. Move jumper W3 (internal to unit) from the 1-2 position to the 3-4 position. With W3 in the 3-4 position, either an external filter must be installed, or a jumper must be installed between pins 2 and 13 of the Output connector to complete the signal path. -
Page 44: Phase Response For 6634C
Figure A-4: Digital Signal Flow Diagram PHASE RESPONSE FOR 6634C The 6634C Phase Response for Broadband output, Acceleration output, Velocity output, and Displacement output are shown in Figure A-5. This phase response represents the output without the Signal Filtering option (Model 35840A). -
Page 45: Interface With 6634A Installations
ENDEVCO 6634C INSTRUCTION MANUAL Figure A-5: Phase Response for 6634C INTERFACE WITH 6634A INSTALLATIONS The 6634C may be interfaced with old 6634A installations using an Endevco interface cable (Endevco Part Number 29685). IM6634C Page A-7...
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