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AM16/32B Relay Multiplexer - Page 11
...Applications
The AM16/32B is used to a common output destined for Campbell Scientific's AM16/32A model.
AM16/32B Relay Multiplexer
1. In conjunction with a second AM16/32B, up...Measurements). The AM16/32B is the same as the AM16/32A model. In "2x32" mode the multiplexer can be measured. The datalogger program is a replacement for the datalogger. Up to be multiplexed by a ...
AM16/32B Relay Multiplexer - Page 16
... port is grounded on 725 card with older PROMS, instruction Set Port (P20) is generally used .
6 A signal in the range of the sensor input channels. The CR800, CR850, CR3000, CR5000, and CR1000 use the PortSet() instruction to a datalogger control port. AM16/32B Relay Multiplexer
dataloggers connect to the AM16/32B as illustrated in FIGURE 4-1. MUCXAPBOLWEER SHIELD
CR800, CR850...
AM16/32B Relay Multiplexer - Page 31
... w/EX
(units=.01 sec)
3: 1
Delay after EX
(units=.01 sec)
0: 0
mV Excitation
5: User Specified Measurement Instruction
;END MEASUREMENT ;LOOP 6: End (P95)
;DEACTIVATE
;MULTIPLEXER
7: Do (P86)
1: 51
Set low
Port 1
FIGURE 5-3. AM16/32B Relay Analog Multiplexer
EXAMPLE "2x32" MODE PROGRAMS - Execution
Interval
CR7 SAMPLE PROGRAM
*
1
Table 1
Programs
01: 60
Sec. Example "2x32...
AM16/32B Relay Multiplexer - Page 34
....
6. In general, longer delay times are necessary when sensors and datalogger are advanced can be construed as AM16/32Bto-datalogger connections. Campbell Scientific recommends that only sensor shield (drain) wires be connected to -AM16/32B control connections (Section 4.1, The Control Terminals), but their presence is implied and required. AM16/32B Relay Analog Multiplexer
;POT.
AM16/32B Relay Multiplexer - Page 36
...completion resistor(s) are installed at the datalogger (FIGURE 6-3).
If measured excitation is completed within the sensor (for multiplexer use), then three probes per SET of measured excitation....the multiplexer COM terminals tie to analog input. The two pairs of COM terminals (ODD H, ODD L and EVEN H, EVEN L) are located at the datalogger panel (example: a Campbell Scientific 107...
AM16/32B Relay Multiplexer - Page 39
... switch set to "4x16" mode, you are 2 lines short for this configuration is to multiplex the four signal wires through the AM16/32B. Alternatively, the excitation and ground leads can be multiplexed through an additional AM16/32B allowing the sensors to simplify programming. In this case the 12V, GND, CLK, and RES lines of the second multiplexer are multiplexed...
AM16/32B Relay Multiplexer - Page 40
... installed ...problems would vary with respect to an L terminal, then a constantan wire should run between the multiplexer's COM ODD L terminal and the datalogger measurement terminal). FIGURE 6-8 and FIGURE 6-9 depict type T thermocouple applications, but other sensor type through the AM16/32B...error analysis. AM16/32B Relay Analog Multiplexer
6.6 Thermocouple Measurement
The datalogger manuals...
AM16/32B Relay Multiplexer - Page 41
... reference, usually a thermistor, can be located at the AM16/32B, as shown in FIGURE 6-9. Differential thermocouple measurement with reference junction at the AM16/32B
If a mix of TCs and other sensor types are multiplexed through the AM16/32B, it is generally best to locate the reference junction on SETs that are in close proximity to the COM terminals...
AM16/32B Relay Multiplexer - Page 42
..., the enclosure should be taken to three thermocouples per SET; The low sides of each thermocouple are multiplexed in the measured temperatures.
• AM16/32B panel switch set to "4x16" mode. • Sensor to largely dissipate before it reaches the terminals. AM16/32B Relay Analog Multiplexer
Thermal Gradients - Installing the aluminum cover plate (FIGURE 6-10) helps to minimize...
AM16/32B Relay Multiplexer - Page 43
.... The wire types here can be used to connect COM terminals to the datalogger.
6.6.3 Differential Thermocouple Measurement
AM16/32B panel switch set to multiplex markedly different sensor types in one soil moisture block are possible. Please consult Campbell Scientific for application assistance if you need to "4x16" mode. Also, the wire that connects the COM ODD...
AM16/32B Relay Multiplexer - Page 44
...AM16/32B Relay Analog Multiplexer
CR10(X)
G 12V
G C1 C2 1H 1L EX 1 2L AG EX 2 2H AG G
MUXPOWER SHIELD
AAMM1166/3/322B
GND 12V GND RES CLK COM COM
ODD H ODD L
SETS 1-16
ODD H ODD L
1K 0.1%
107 COM EVEN H
SETS...w/EXchan 1
4: 1
Loc [:REFTEMP ]
5: 1
Mult
6: 0
Offset
ENABLES MULTIPLEXER
2: Do (P86)
1: 41
Set high Port 1
BEGINS MEASUREMENT LOOP
3: Beginning of Loop (P87)
1: 0
Delay...
AM16/32B Relay Multiplexer - Page 45
...Mult
8: 0
Offset
ENDS MEASUREMENT LOOP 8: End (P95)
DISABLES MULTIPLEXER
9: Do (P86)
1: 51
Set low Port 1
CALCULATES BRIDGE TRANSFORM ON SOIL MOISTURE BLOCKS
10: BR... mV fast Range
3: 3
IN Chan
4: 2
Excite all reps w/EXchan 2
5: 250
mV Excitation
6: 18--
AM16/32B Relay Analog Multiplexer
CLOCK PULSE 4: Do (P86)
1: 72
Pulse Port 2
5: Excitation with Delay (P22)
1: 1
EX Chan
...
AM16/32B Relay Multiplexer - Page 46
AM16/32B Relay Analog Multiplexer
9:TC #8
27:SOIL M#10
10:TC #9
28:SOIL M#11
11:TC #10
29:SOIL... Block Measurement
'CR1000 Series Datalogger
'Declare Public Variables
Public PTemp, batt_volt, TCTemp(16), Soil(16)
Dim I
'Counter for setting Array element
'Define Data Tables DataTable (Avg15Min,1,-1)
DataInterval (0,5,Min,10) Minimum (1,batt_volt,FP2,0,False) Average (1,PTemp,IEEE4,False) ...
AM16/32B Relay Multiplexer - Page 47
...). To minimize capacitive effects, Campbell Scientific recommends the use of your datalogger manual contains more information. Examples include soil moisture probes and thermistor probes. Installation
The standard AM16/32B may also be connected to the AM16/32B power ground ("GND") establishes this connection.
AM16/32B Relay Analog Multiplexer
7. General Measurement Considerations
Long...
AM16/32B Relay Multiplexer - Page 48
An enclosure may produce explosive or noxious gases (for example, lead-acid batteries).
38 AM16/32B Relay Analog Multiplexer
8.1 Mounting Tabs
The AM16/32B has mounting tabs allowing attachment by four screws. Mounting tab hole pattern
U-bolts are available from Campbell Scientific and should not be restricted through an enclosure containing batteries that may also be used inside...
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