Campbell AM16/32B User Manual Download

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Table of Contents – i

AM16/32B

Relay Multiplexer

Revision: 1

/20

Campbell Scientific, Inc.

Summary of Contents for AM16/32B

Page 2: ...sure 15 8 Operation 15 8 1 Programming 16 8 1 1 Short Cut programs 16 8 1 2 Using CRBasic MuxSelect instruction 18 8 1 3 General programming considerations 18 8 1 4 Mixed sensor types 19 8 2 General m...

Page 3: ...nection 24 FIGURE B 4 Full bridge measurement 26 FIGURE C 1 Differential thermocouple measurement with reference junction at the data logger 29 FIGURE C 2 Differential thermocouple measurement with re...

Page 4: ...sors to be measured NOTE This manual provides information for CRBasic data loggers and AM16 32Bs with serial numbers greater than 5056 For Edlog and other retired data logger support or for specificat...

Page 5: ...ging the setting of the mode switch from 4x16 to 2x32 connects COM ODD H to COM EVEN H and also COM ODD L to COM EVEN L After wiring the AM16 32B exercise due care to avoid inadvertently putting exces...

Page 6: ...for programming the CR300 series to use the AM16 32B To use the AM16 32B with the CR300 series the program must be created in the CRBasic Editor See Single ended voltage measurement p 21 and Differen...

Page 7: ...ejection for the United States and areas using 60 Hz AC voltage Select 50 Hz Noise Rejection for most of Europe and areas that operate at 50 Hz A second prompt lists sensor support options Campbell Sc...

Page 8: ...ger The Progress Bar is used to track the progress of the program being created It is also used to jump directly to any step in the programming process The next window displays Available Sensors and D...

Page 9: ...6 32 tab selected select the Sensors Temperature subfolder Double click on 107 Temperature Probe 4 wire In the resulting window enter the number of 107 temperature probes to measure on this AM16 32B m...

Page 10: ...or longer is recommended Enter 30 and select Seconds Click Next After adding the measurements click Wiring Diagram to see how the sensors are wired to the AM16 32B and how the AM16 32B is wired to the...

Page 11: ...s list to return to the sensor selection screen Select any other sensors being installed in the Sensors section Add sensors to the data logger by selecting the data logger tab CR6 in this example Add...

Page 12: ...erview Under data logger control the AM16 32B sequentially connects terminal pairs or groups to data logger terminals This effectively expands the number of terminals available on a data logger FIGURE...

Page 13: ...ctive 6 mA typical in 2x32 mode 11 mA typical in 4x16 mode Reset RES 1 A continuous signal between 3 3 VDC and 8 VDC holds the AM16 32B in an active state where a clock pulse can trigger a channel adv...

Page 14: ...s per CR6 4 AM16 32Bs per CR3000 4 AM16 32Bs per CR1000X 2 AM16 32Bs per CR800 CR850 1 AM16 32B per CR300 4 AM16 32Bs per CR1000 Maximum cable length Depends on sensor and scan rate In general longer...

Page 15: ...56 refer to an older version of this manual at www campbellsci com old manuals 3 Assumes sequential activation of multiplexers and that each data logger channel is uniquely dedicated If the applicatio...

Page 16: ...ated under the blue COM label next to the mode switch The terminals are labeled ODD H L and EVEN H L In 4x16 mode the AM16 32B maintains the four COM terminals electrically isolated from one another I...

Page 17: ...eld ground and the ground lug to provide surge suppression The AM16 32B GND terminal is connected to data logger power ground The AM16 32B GND terminal is also connected to the cable shield and via th...

Page 18: ...tate In the low power state the common COM terminals are electrically disconnected from all the sensor input channels Always connect RES to a data logger terminal configured for control The MuxSelect...

Page 19: ...channel numbers apply The SETs are labeled beginning with 1H 1L and ending with 32H 32L In 2x32 mode when the AM16 32B selects a given channel the H terminal is relay connected to both COM H terminal...

Page 20: ...er is in 2x32 mode the first seven terminal pairs numbers in white on the multiplexer will be used When in 4x16 mode this instruction will use the first seven groups of four numbers in blue on the mul...

Page 21: ...tiplexer and the PortSet instruction to disable it The generalized programming sequence follows Turn AM16 32B Multiplexer on C1 CLK C2 RES Advance to first measurement channel in SET 1 MuxSelect C1 C2...

Page 22: ...nt instruction to allow time for wire capacitances to discharge after advancing a channel before the measurement is made This can be done by increasing the Delay parameter in the PulsePort instruction...

Page 23: ...This program can now be edited for additional refinement NOTE Once the file is edited with CRBasic Editor Short Cut can no longer be used to edit the program it created 2 To add the Short Cut wiring...

Page 24: ...ns also require a 150 ms Delay instruction immediately after the PortSet instruction Using MuxSelect with the AM16 32B does not require the delay allowing for faster operation In all cases PortSet is...

Page 25: ...16 mode Sensors Control and COM terminals Measurement terminals Signal Ground Signal Ground COM ODD H Odd numbered H terminal Sensor 1 2 and 3 grounds 1H 1H COM ODD L Odd numbered L terminal Sensor 1...

Page 26: ...0 CR800 series or CR1000 In either case the AM16 32B must be in 2x32 mode View the program in the CRBasic Editor FIGURE B 2 Typical differential voltage measurement connection These programs use array...

Page 27: ...exer See AM16 32B Example B 5 CR6 107 temperature probe measurements CR6 and Table B 3 for the program and wiring diagram or use Short Cut to create the program With minor adjustments the CR6 program...

Page 28: ...Full bridge measurement Up to sixteen full bridge measurements may be multiplexed through the AM16 32B A problem with making full bridge measurements with this configuration is that the resistance of...

Page 29: ...EVEN L Even numbered L Low COM Shield 12V 12V G G C1 CLK C2 RES B 5 CS616 measurement Example AM16 32B Example B 7 CR1000X CS616 measurements CR1X is a CR1000X program measuring 48 Campbell Scientifi...

Page 30: ...1 2 and 3 Orange 1H COM ODD L Odd numbered L Sensor 1 Green 1L COM EVEN H Even numbered H Sensor 2 Green 2H COM EVEN L Even numbered L Sensor 3 Green Signal Ground COM Black 12V 12V G G C1 CLK C3 RES...

Page 31: ...configurations are possible 1 reference located at the data logger or 2 reference at the AM16 32B C 1 2 Data logger reference If the reference junction is at the data logger matching thermocouple wire...

Page 32: ...AM16 32B if thermocouples are measured with respect to the data logger reference the signal wires between the data logger and AM16 32B are made of thermocouple wire Two problems would arise due to the...

Page 33: ...in thermocouple readings For example with type T thermocouples a one degree gradient between the input terminals and the COM terminals will result in an approximate one degree measurement error Insta...

Page 34: ...ther manufacturer s products that are resold by Campbell Scientific are warranted only to the limits extended by the original manufacturer Refer to www campbellsci com terms warranty for more informat...

Page 35: ...ion or Repair Reference number contact your CAMPBELL SCIENTIFIC regional office Please write the issued number clearly on the outside of the shipping container and ship as directed For all returns the...

Page 36: ...and prohibit climbing by other persons Take reasonable precautions to secure tripod and tower sites from trespassers Use only manufacturer recommended parts materials and tools Utility and Electrical...

Page 37: ...nfo campbellsci fr www campbellsci fr Germany Location Phone Email Website Bremen Germany 49 0 421 460974 0 info campbellsci de www campbellsci de India Location Phone Email Website New Delhi DL India...

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