Campbell Scientific AM25T 25-Channel Solid State Multiplexer User Manual
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AM25T Solid State Multiplexer
ClkPort: The ClkPort argument is the control port that will be used to clock
the AM25T. One clock port may be used with several AM25Ts. A numeric
code is entered for this argument:
Code Description
1
Control Port 1
2
Control Port 2
3
Control Port 3
4
Control Port 4
5
Control Port 5
6
Control Port 6
7
Control Port 7
8
Control Port 8
ResPort: The ResPort argument is the control port that will be used to enable
and reset the AM25T. Each AM25T must have a unique Reset port. A numeric
code is entered for this argument; refer to ClkPort above.
ExChan: The ExChan argument is the excitation channel that will be used to
provide switched excitation for the PRT reference temperature measurement.
An alphanumeric or numeric code can be entered:
Alphanumeric Numeric Description
0
0
Temperature not measured
VX1
1
Excitation channel 1
VX2
2
Excitation channel 2
VX3
3
Excitation channel 3
RevDiff: A constant is entered for the RevDiff parameter to determine whether
the inputs are reversed and a second measurement made. This function will
remove any voltage offset errors due to the datalogger measurement circuitry,
including common mode errors. Enabling this parameter will double
measurement time. False (or 0) = Do not make second measurement; True (or
1) = Reverse inputs and make second measurement.
SettlingTime: The SettlingTime parameter is the amount of time to delay after
setting up a measurement and before making the measurement. Refer to the
table below for default SettlingTimes.
Entry Range Integration Settling
Time
0 All 250
μs 450
μs (default)
0
All
_50Hz
3 ms (default)
0
All
_60Hz
3 ms (default)
>100 All All
μs entered
Integ: The Integ parameter is the amount of time, in microseconds, to integrate
a signal for the channel being measured.
Option Description
250
Performs a 250 microsecond integration.
_60Hz
Performs a 16.667 millisecond integration; filters 60 Hz noise.
_50Hz
Performs a 20 millisecond integration; filters 50 Hz noise.
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