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ENDEVCO 133, Instruction Manual

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ENDEVCO 133 Instruction Manual Download Page 19

 

 

ENDEVCO

    www.endevco.com    Tel: +1 (866) ENDEVCO  [+1 (866) 363-3826] 

IM133, Page 19 

®

 
2.4.8  Filter Options and Installation 

 
 

1. 

Introduction 

 
 

The  ENDEVCO  Model  31875  plug  in,  Low  Pass  Filter  Modules  are  optional  Butterworth  filters 
designed for use with the Endevco Model 133, PE and ISOTRON Signal Conditioner and Model 
136,  DC  Amplifier.    The  filters  are  low-cost  designs  with  sufficient  corner  frequencies  to 
accommodate most test requirements. 

 
 

The self-identifying feature allows quick verification of the filter installed in a particular channel for 
the model 133 or model 136.  Each channel will display the filter corner frequency on the LED 
digital panel meter.  Only the filter corner frequency is displayed.  The filter type (Butterworth) can 
only be visually verified by removing the outer cover. 

 
 

There are 20 corner frequencies available, ranging from 10 Hz to 80 kHz in 1, 2, 4, 6, and 8 steps 
for each of the three filter types.  The 31875 must be specified in the following manner:  31875-
XXXX-Y.  The "XXXX" is the -3 dB corner frequency, determined by multiplying XXXX by 10.  If 
the "XXXX" is left blank, the standard 10 kHz filter is supplied (-1000).  The Y indicates the filter 
type desired, -0 for the Butterworth if the "Y" is left blank the standard Butterworth filter is supplied. 

 
 

The filter options of 400 Hz and 2,000 Hz are not valid.  The 400 Hz option has been replaced by 
300 Hz.  The 2,000 Hz option has been replaced by 1,650 Hz.  These two lower frequency options 
are specifically made to comply with the filter corner requirements of J211 and ISO6487. 

 
 

If no filter is specified at time of order entry, the standard default filter installed is a 10 kHz low pass 
Butterworth. 

 
 

See Appendix 1 for the Model 31875 Low Pass filter data sheet and corner frequency selections. 

 
 
 

2. 

Filter Change/Replacement 

 
 

Place the model 133 on a level, firmly supported surface.  Remove the two front panel screws.  
Leave the front panel connector connected to the main board.  Carefully slide the black cover from 
the unit.  

 
 

Reference Figure 7 for the location of the three filter modules.  Carefully pry off the metal grounding 
shield and locate the existing filter module(s) and gently pry it off (as you would an IC in a socket) 
and store it for future use.   

 
 

Observing the correct orientation of the new filter module(s), install it in the correct channel location 
desired.  Reinstall the grounding shield. 

 
 

Ensure the front panel connector is firmly connected and re-assemble the cover and front panel. 

 

 

CAUTION: 

Ensure that the two front panel mounting screws are not over tightened or cross 
threaded.    The  aluminum  rail  screws  mount  into  soft  metal  that  can  easily  be 
damaged.  Should the rail become damaged, simply locate a replacement screw 
of a 1/2 inch longer length and install into the damaged rail.  (The screws are 4-
40, stainless steel, self-tapping.) 

Summary of Contents for 133

Page 1: ...ENDEVCO www endevco com Tel 1 866 ENDEVCO 1 866 363 3826 IM133 Page 1 INSTRUCTION MANUAL For Model 133 PS ISOTRON SIGNAL CONDITIONER IM133 Revision H2 ...

Page 2: ... Programming Mode 12 2 4 4 Function Selection 12 2 4 5 Special Modes 15 2 4 6 Fault Indication 18 2 4 7 RS 232 Operation 19 2 4 8 Filter Options and Installation 20 2 4 9 Sample Set Up 21 2 5 RACK MOUNTING KIT 22 SECTION 3 ROUTINE MAINTENANCE AND HANDLING 3 1 INTRODUCTION 22 3 2 FACTORY SERVICE 23 3 3 ACCESSORIES 24 SECTION 4 APPENDIX 1 Model 31875 XXXX O Filter Data Sheet 24 2 Serial Communicatio...

Page 3: ...ngs ENDEVCO has pioneered the concept of computer controlled signal conditioners The first generation was the Multi channel Amplifier Control system MAC The second generation was the Computer Controlled Amplifier Systems CCAS The CCAS family consists of five different systems that use the same rack and digital interface assemblies with different analog boards These units receive their setup comman...

Page 4: ...anually programmed from the front panel Figure 1 by means of a Select Channel push button three 3 Channel LEDs a Select Function push button seven 7 Function LEDs indicating which function has been selected by the Select Function push button referred to in this document as the function LEDs a four 4 character LED display to show the state of each function four 4 EDIT push buttons to change the ent...

Page 5: ...erify that all standard and ordered optional accessories are included 2 1 2 FILTER MODULE INSTALLATION OR REPLACEMENT For filter module installation or replacement see Section 2 4 8 of this manual 2 1 3 POWERING ON THE UNIT For AC input power install the EW599 power cord into the rear power connection of the Model 133 See Figure 2 Rear Panel AC input power For optional DC input power Model 133 1 i...

Page 6: ...ns illuminated until a different channel is selected Figure 1 Item 3 is the LED for channel one of the three channel unit The LED illuminated corresponds to the channel that is actively being set up or data displayed on the DPM Figure 1 Item 4 is the digital panel meter DPM The DPM displays alpha numerics for the appropriate Select Channel selected and is used to display the channel set up and for...

Page 7: ... 264 VAC 50 60 Hz No jumpers or adjustment is required for input voltages within this range There is no on off power switch for the unit Figure 2 Item 2 is the Single Ended Piezoelectric SEPE input connector This is a standard 10 32 connector mating to Endevco s 3090 and 3060 series cables Figure 2 Item 3 is a blocked off area for a single channel depicted is channel 3 The channels correspond to t...

Page 8: ...tem 1 is the DC input power connector The input power requirements are 9 to 18 volts DC and a maximum current of 1 amp The input connector is a 760 Plug style Figure 3 RS 232 Isotron IN OUTPUT I N Charge CHANNEL 3 Isotron IN OUTPUT IN Charge CHANNEL 2 Isotron IN OUTPUT I N Charge CHANNEL 1 9 18 VDC Charge IsotronSignal Conditioner 1 ...

Page 9: ... 133 block diagram Figure 5 Figure 5 is the block diagram for the RJ 11 RS 232 computer control connector 0 4 or 10 mA 24 VDC Charge Converter 0 303 mV pC 10 32 Connector BNC Programmable Gain 0 to 100 Fault Detector 10 Hz 4 pole High Pass Filter 4 pole Butterworth Low Pass Filter BNC Gain 3 Gain 1 10 ...

Page 10: ...e 6 Figure 6 is the RJ 11 Modular Jack Front View RS 232 Pin 1 Analog Ground Pin 2 TX connects to RX in computer Pin 3 Not Used Pin 4 RX connects to TX in computer Pin 5 Digital Ground Pin 6 Digital Ground R X Digital Ground Digital Ground 1 2 3 4 5 6 Not Used TX Analog Ground ...

Page 11: ...ing programmed by pressing the Select Channel push button Each press of the Select Channel push button will sequentially turn on one of the 3 Channel LED s located to the right of the Select Channel push button indicating the channel number selected for programming The unit will remain in the selected mode state of operation normal or query programming while pressing the Select Channel push button...

Page 12: ...n selects the next function corresponding Function LED blinking and the corresponding setting is displayed on the LED display Pressing the Select Function push button while the Monitoring State function LED is flashing puts the unit immediately back into Normal mode The following functions can be selected for programming 1 Input Select 2 ISOTRON Current Excitation 3 Sensor Sensitivity 4 Output Sca...

Page 13: ... transducer in mV EU for Voltage input or pC EU for Charge input The Endevco Model 133 uses this information to determine the gain needed to achieve the required output scaling The left right EDIT push buttons select the number position in the LED display and the up down EDIT push buttons increment or decrement the selected number The user can enter four significant digits ranging from 0 001 to 99...

Page 14: ... a value from 0 01 10 Hz to 80 00 80 kHz The unit displays the actual corner frequency in each channel by reading an ID Voltage VID set by the header module that sets the 3dB corner frequency of the low pass filter VID ranges from 0 to 2 VDC The unit uses the table shown in section 10 0 to convert the ID Voltage into the corner frequency in Hz 7 Monitoring State This function selection provides fo...

Page 15: ...ines its address at power up by using the following algorithm 1 VID Address determined by ID voltage set in hardware 2 MEM Address stored in non volatile memory 3 READ VID 4 IF VID 0 THEN Address MEM 5 IF VID 0 THEN Address VID MEM This special mode is selected by pressing the Select Function push button while simultaneously pressing the RIGHT EDIT push button The unit returns to the normal mode o...

Page 16: ...utton while simultaneously pressing the DOWN EDIT push button The unit returns to the normal mode of operation Monitoring or Non monitoring state immediately after writing all of the function settings into non volatile memory 5 Test Display This special mode selection allows the user to test the display board by displaying a different pattern on the LED indicators and the LED display every time an...

Page 17: ...ration A checksum for the calibration constants is also stored in non volatile memory The unit will use this checksum at power up to verify that all calibration constants are good The unit will declare an error if the checksum test for the calibration constants fails A cross reference table between the calibration constants and the Function LEDs is shown below the input select and gain settings fo...

Page 18: ...he fault indicator will turn on if the ISOTRON input is either open or short circuited while the input select function for the corresponding channel is set to ISOTRON and the Current Exc is turned on 4 or 10 mA 2 4 7 RS 232 Serial Communication The unit has a standard RS 232 serial interface available through an RJ 11 connector located on the rear panel see Figures 3 5 and 6 In the accessories sec...

Page 19: ... are not valid The 400 Hz option has been replaced by 300 Hz The 2 000 Hz option has been replaced by 1 650 Hz These two lower frequency options are specifically made to comply with the filter corner requirements of J211 and ISO6487 If no filter is specified at time of order entry the standard default filter installed is a 10 kHz low pass Butterworth See Appendix 1 for the Model 31875 Low Pass fil...

Page 20: ...or ISOTRON accelerometer was selected then it is acceptable to set the current level to 4 mA as a starting point Only one common current level may be set for all three channels Assume a PE accelerometer is used so any selection is acceptable 4 Press the Select Function button to advance to Sensitivity pC or mV EU While the LED is flashing enter the correct sensitivity value of the sensor being use...

Page 21: ...o a known vibration source such as a shaker as a means to verify the input vibration level and verify the output with various input g levels 10 Connect an oscilloscope or other monitoring devices to visually see the input signal or reference the DPM on the front of the Model 133 11 Channels two and three are controlled in a similar manner 2 5 RACK MOUNTING KIT A Description The optional rack mount...

Page 22: ...evco www endevco com Tel 1 866 ENDEVCO 1 866 363 3826 To return an instrument please 1 Ensure proper packaging preferably the original shipping cartons 2 Prepay shipping and insurance charges 3 Attach the Return Material Authorization RMA number from Endevco and include any information that may be pertinent to the description of the failure problem B WARRANTY Endevco warrants each new electronic i...

Page 23: ...on Manual IM133 1 10 32 to BNC adapter EJ21 0 Filter Module 4 pole Low Pass Filter Options 31875 XXXX Y 0 Serial DB9F to RJ 11 Adapter EJ807 0 7 ft 6P4C Cable with RJ 11 Modular Plugs Straight Pinning EW1027 0 Rack Mounting Kit 31979 0 Auto Lighter to 760 Plug Cord Assembly 133 1 only EHM1409 1 12 VDC Power Supply 26 Watts EHM1413 0 Serial Communication Kit Containing the following Software three ...

Page 24: ...orner frequencies are as follows fo Hz Part number to order 10 31875 0001 0 20 31875 0002 0 40 31875 0004 0 60 31875 0006 0 80 31875 0008 0 100 31875 0010 0 200 31875 0020 0 300 31875 0030 0 600 31875 0060 0 800 31875 0080 0 1000 31875 0100 0 1650 31875 0165 0 4000 31875 0400 0 6000 31875 0600 0 8000 31875 0800 0 10 000 31875 1000 0 20 000 31875 2000 0 40 000 31875 4000 0 60 000 31875 6000 0 80 00...

Page 25: ...nnel device is determined by the rack For standalone systems the address is programmable through the front panel All units will receive all serial transmissions However only the unit with the same unit address will respond Channel Required is in the range 1 3 However commands 0 2 3 4 5 7 allow 0 to indicate the command and it s associated data if any applies to all channels Command Required is one...

Page 26: ...ttings are multiplied by 1000 and converted to ASCII 4 Each item is separated by 1 space character 0x20 Channel Calibration Constant Data This packet consists of 7 items These items correspond exactly to the 7 items associated with the Function LEDs on the front panel of the 13x units while in Calibration Mode The specifics of these are detailed in the section specifying Calibration Mode Their met...

Page 27: ...l number indicated in the header equals zero 0 then data will be sent for all three channels Calibration Constant Data The data sent in response to the Cal Constants from 13x command 0x03 is identical to the format of the Cal Constants to 13x command 0x01 described above If the channel number indicated in the header equals zero 0 then data will be sent for all three channels Calibrated Vout Data T...

Page 28: ...ation Constant Read Error Bit 3 1 Function Error Bit 4 1 Auto Zero Error Transmission Error Responses In the event of a transmission error or data packet parameter errors one of the following may be sent by the 13x unit NAK 0x0C This response indicates either a bad checksum was calculated or there was not enough data transferred to satisfy the command requirements i e a setup command with less tha...

Page 29: ...s1000 s187 Binary Representation of ASCII string these are the bytes actually transmitted via rs 232 in decimal 50 53 55 32 48 32 48 59 51 48 48 48 32 50 49 50 51 32 51 52 53 54 32 49 48 48 48 32 50 48 48 48 32 49 48 48 48 32 49 48 48 48 32 49 53 56 55 Where 1 ASCII 257 50 53 55 is the result of the binary operation 1 8 1 Where 0 Model 136 and 1 is the unit number this binary number is then conver...

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