Geokon 8032 Instruction Manual Download Page 11 | Manualshive

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Geokon 8032 Instruction Manual Download Page 11

5

Clock

T1

T2

T3

Channel 2

1

2

Channel Selected

Channel 1

1

T4

2

3

Timing:

T2 = min 20 usec

T3 = min 40 µsec (25kHz)

T1 = min 20 usec

T4 = 500 µsec

Figure 6 - 32 Channel GK-403 Channel Selection Timing

The GK-403 channel selection scheme is not well suited to long cable lengths. The
maximum recommended distance between the GK-403 and multiplexer is 50 feet (15
meters).

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Summary of Contents for 8032

Page 1: ...ced by any means without the written consent of Geokon Inc The information contained herein is believed to be accurate and reliable However Geokon Inc assumes no responsibility for errors omissions or misinterpretation The information herein is subject to change without notification Copyright 2015 by Geokon Inc Doc Rev H 6 1 ...

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Page 3: ...re are no warranties except as stated herein There are no other warranties expressed or implied including but not limited to the implied warranties of merchantability and of fitness for a particular purpose Geokon Inc is not responsible for any damages or losses caused to other equipment whether direct indirect incidental special or consequential which the purchaser may experience as a result of t...

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Page 5: ... 2 1 INSTALLATION 7 2 2 WIRING 7 2 3 DATALOGGER CONNECTION 10 3 MAINTENANCE 10 4 TROUBLESHOOTING 11 APPENDIX A SPECIFICATIONS 12 APPENDIX B CONNECTOR AND CABLE WIRING 14 APPENDIX C MANUAL SWITCH INSTRUCTIONS 16 APPENDIX D DAISYCHAIN OPERATION 17 APPENDIX E MAXIMUM 8032 5 TAN CABLE CABLE LENGTHS 19 APPENDIX F MEMS SENSOR TO MULTIPLEXER WIRING 20 ...

Page 6: ...LECTION TIMING 6 FIGURE 8 32 CHANNEL MICRO 800 MICRO 1000 CHANNEL SELECTION TIMING 6 FIGURE 9 MULTIPLEXER ENCLOSURE MOUNTING DIMENSIONS 7 TABLE 1 16 CHANNEL MULTIPLEXER TERMINAL BOARD WIRING 8 TABLE 2 32 CHANNEL MULTIPLEXER TERMINAL BOARD WIRING 8 FIGURE 10 TERMINAL BOARD LAYOUT 9 TABLE B 1 J4 I O CONNECTOR 14 TABLE B 2 P1 I O CONNECTOR 14 TABLE B 3 J1 J2 TERMINAL BOARD CONNECTORS 15 FIGURE 11 MAN...

Page 7: ...lexer typically used with the Micro 800 Datalogger MICRO 1000 Datalogger or GK 403 Readout Box Two switching configurations are supported 16 channels of 4 conductors or 32 channels of 2 conductors For the 8032 C these configurations are set by a DipSwitch on the top side of the circuit board A second DipSwitch selects whether the 8032 C is being used with a datalogger or GK 403 Readout Box For the...

Page 8: ... 16 Sensor Shield 1H 2H 1L 2L S1 31H 32H 31L 32L S16 Figure 1 16 Channel Switching Block Diagram The 16 channel 4 wire switching configuration is typically used to multiplex 4 wire sensors such as resistance strain gage load cells It is also used to switch connections for instruments which have more than one sensor integral to them such as vibrating wire pressure transducers with an integral therm...

Page 9: ...rs or thermocouples The multiplexer is powered by a nominal 12 VDC supply Two control lines RESET and CLOCK determine how channel selection is accomplished Two schemes are supported one when connected to the GK 403 Vibrating Wire Readout Box and the other when connected to MICRO 800 or MICRO 1000 dataloggers See the following sections explaining how each mode operates Figure 3 illustrates the DIP ...

Page 10: ...ce through all channels Multiplexers can also be connected together in a daisy chain fashion using the GK 403 protocol In 16 channel mode the number of clock pulses equals 2 times the desired channel number In 32 channel mode the number of clock pulses equals the desired channel number plus 1 Note the timing below for 16 and 32 channel switching arrangements Clock Channel 2 1 2 Timing T2 min 20 us...

Page 11: ... min 20 usec T3 min 40 µsec 25kHz T1 min 20 usec T4 500 µsec Figure 6 32 Channel GK 403 Channel Selection Timing The GK 403 channel selection scheme is not well suited to long cable lengths The maximum recommended distance between the GK 403 and multiplexer is 50 feet 15 meters ...

Page 12: ...ram below The CLOCK line sequentially advances the channels beginning with channel 1 Note the timing diagrams below for 16 and 32 channel switching respectively Reset Clock Channel 1 T1 T2 T3 No Channel Selected No Channel Selected Channel 16 Pulse 1 Pulse 2 Pulse 31 Timing T2 2 mSsec min T3 2 mSsec min T1 50 mSec min Selected Selected Pulse 32 Figure 7 16 Channel MICRO 800 MICRO 1000 Channel Sele...

Page 13: ...e 9 Multiplexer Enclosure Mounting Dimensions An earth ground lug is installed on the bottom of the enclosure Drive a copper stake into the ground or use an existing grounded metal structure and attach a large gauge copper wire 12 AWG from earth ground to the earth ground lug of the enclosure 2 2 Wiring The enclosure has cable entries for passing the instrument cables to the terminal board These e...

Page 14: ...t Pot 16 32H Thermistor 16 P to Bridge 16 Remote Sense Pot 16 32L Thermistor 16 P to Bridge 16 Ground Pot 16 S16 Shield Drain Wire from Sensor 16 Shield Drain Wire from Bridge 16 Shield Drain Wire from Pot 16 Table 1 16 Channel Multiplexer Terminal Board Wiring Terminal Board Vibrating Wire Thermistor Thermocouple 1H VW Sensor 1 Thermistor 1 Thermocouple 1 1L VW Sensor 1 Thermistor 1 Thermocouple ...

Page 15: ... J2 1H 1L 2H 2L S1 3H 3L 4H 4L S2 5H 5L 6H 6L S3 7H 7L 8H 8L S4 9H 9L 10H 10L S5 11H 11L 12H 12L S6 13H 13L 14H 14L S7 15H 15L 16H 16L S8 17H 17L 18H 18L S9 19H 19L 20H 20L S10 21H 21L 22H 22L S11 23H 23L 24H 24L S12 25H 25L 26H 26L S13 27H 27L 28H 28L S14 29H 29L 30H 30L S15 31H 31L 32H 32L S16 J 4 EARTH J4 T1 2 T3 4 T5 6 T7 8 T9 10 T11 12 T13 14 T15 16 T17 18 T19 20 T21 22 T23 24 T25 26 T27 28 T...

Page 16: ...blems with the system Water or other contaminants can also enter through improper use of the cable entries Additional sealing of the entries can be done with various sealing compounds such as RTV If moisture is condensing inside desiccant can be used to keep this to a minimum Desiccant is available from the factory Are connections corroding If the unit is installed near salt water for example salt...

Page 17: ...lean if corrosion exists Try moving the sensor wired to the suspect channel to another channel to verify the malfunctioning of the channel as opposed to the sensor No channels are working Inspect circuit board for shorts opens or other damage Is moisture present on circuit board If so install desiccant to absorb Channel selection appears to be random Has corrosion built up on the circuit board Cle...

Page 18: ...ad silver alloy On Resistance 100 m Coil Resistance 405 Maximum Switching Power 30W resistive Maximum Switching Voltage 110 VDC Maximum Switching Current 1 A Operate Time 5 msec Max Release Time 5 msec Switching Life 5 x 107 operations mechanical 2 x 105 operations electrical 30W Ambient Temperature 40 to 70 C A 3 Tripolar Plasma Surge Arrestor Nominal DC Breakdown Voltage 230V Surge Life 100 10 1...

Page 19: ...r 1500W Peak forward Surge Current 200A Reverse Standoff Voltage 16 0V A 7 Transducer Connection Maximum Operating Voltage Levels Common mode Voltage Earth Ground 16V max Differential mode Voltage Channel H Channel L 16V max A 8 Reset and Clock Maximum Operating Voltage Levels Single ended Control Voltage System Ground 16V max ...

Page 20: ...iption 8032 5 TAN Cable Wire Color 1 2 SHLD SHIELD Shield Drain Wires all pairs plus overall 3 4 SHLD SHIELD Shield Drain Wires all pairs plus overall 5 6 C1H COM HI 1 White 7 8 C1L COM LO 1 White s Black 9 10 C2H COM HI 2 16 channel Red 11 12 C2L COM LO 2 16 channel Red s Black 13 14 SHLD SHIELD Shield Drain Wires all pairs plus overall 15 16 12V 12 Volt Power Yellow 17 18 GND Power Ground Yellow...

Page 21: ... 8H 15 T23 24 24H 16 T7 8 8L 16 T23 24 24L 17 T15 16 16L 17 T31 32 32L 18 T15 16 16H 18 T31 32 32H 19 T15 16 15L 19 T31 32 31L 20 T15 16 15H 20 T31 32 31H 21 T13 14 14L 21 T29 30 30L 22 T13 14 14H 22 T29 30 30H 23 T13 14 13L 23 T29 30 29L 24 T13 14 13H 24 T29 30 29H 25 T11 12 12L 25 T27 28 28L 26 T11 12 12H 26 T27 28 28H 27 T11 12 11L 27 T27 28 27L 28 T11 12 11H 28 T27 28 27H 29 T9 10 10L 29 T25 2...

Page 22: ...nting screws Panel mounting screws Switch for gages 1 8 Switch for gages 9 16 Position to switch gages 9 16 Vibrating wire gage posts Red Black Thermistor posts White Green Shield connection Blue Switch panel Terminal board switch panel enclosure Lid securing clasp Lid securing clasp Figure 11 Manual Switch Panel Enclosure To obtain readings with the manual switching follow these steps 1 Open the ...

Page 23: ...g Channels Accessed 2 3 4 OFF OFF OFF 1 32 32 channel mode 1 16 16 channel mode DEFAULT MUX1 OFF OFF ON 33 64 32 channel mode 17 32 16 channel mode MUX2 OFF ON OFF 65 96 32 channel mode 33 48 16 channel mode MUX3 OFF ON ON 97 128 32 channel mode 49 64 16 channel mode MUX4 ON OFF OFF 129 160 32 channel mode 65 80 16 channel mode MUX5 ON OFF ON 161 192 32 channel mode 81 96 16 channel mode MUX6 ON O...

Page 24: ...ogger C7 C8 Multiplexer 1 MUX1 Reset Clock Reset Reset Clock Clock Multiplexer 2 MUX2 Multiplexer 3 MUX3 H J H H J J VW Gages 1 32 VW Gages 65 96 VW Gages 33 64 H J H J IN IN IN OUT OUT SW1 SETTING 2 3 4 OFF OFF OFF SW1 SETTING 2 3 4 OFF OFF ON SW1 SETTING 2 3 4 OFF ON OFF ...

Page 25: ...such as ambient temperature number of 8032 Multiplexers Daisy Chain configuration and system battery voltage need to be considered in determining the maximum 8032 5 cable length For a single 8032 Multiplexer under normal operating conditions System Battery 12V ambient temperature 20 C the maximum recommended cable length from the Datalogger to the 8032 Multiplexer is 4588 feet 1400m Figure E 1 dis...

Page 26: ...able Shield Up to eight 8 Biaxial MEMS sensors are connected to each Canary 6 wire Multiplexer through the weather tight strain relief fittings mounted to the Datalogger enclosure with the final connection made to the terminal blocks mounted on the Multiplexer Each terminal block or Multiplexer channel consists of seven 7 clamp connections A sample biaxial MEMS connection is as follows for termina...

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