AM25T Solid-State Thermocouple Multiplexer
6
Operating Humidity
Noncondensing:
0 to 95%
Dimensions
Length:
23.6 cm (9.3 in)
Width:
5.10 cm (2.0 in)
Depth:
13.2 cm (5.2 in)
Weight:
0.91 kg (2.0 lb)
3.6 kg (8.0 lb); shipping
Expandability (Nominal)*:
1 AM25T per CR300 or CR310 (requires OS
version 6 or later)
2 AM25Ts per CR800 or CR850
3 AM25Ts per CR6
4 AM25Ts per CR1000, CR1000X, CR3000
7 AM25Ts per CR5000
CR9000X variable, depending on how many
CR9051E modules are installed
Maximum Data Cable Length:
Multiplexers can be located up to 305 m
(1000 ft) from the data logger. When
lightning protection is required, do not
exceed 152 m (500 ft) in data cable length.
The spark gaps will not fire if the heavy
ground wire is longer than 152 m (500 ft).
Typical relay Resistance:
500
Ω
Maximum Switching Current:
25 mA; switching currents greater than
25 mA damages the relays and renders them
unusable.
Compliance:
View the EU Declaration of Conformity at
*Assumes sequential activation of multiplexers and that each data logger channel is
uniquely dedicated. If your application requires additional multiplexing capability,
please consult Campbell Scientific for application assistance.
7. Installation
7.1 Installing the AM25T
The AM25T may be operated in a non-condensing environment, such as a
laboratory, without being housed in an enclosure. For field use, the AM25T
must be protected against dust and liquid. Campbell Scientific offers weather-
resistant enclosures for this purpose.
Fasten the AM25T to the enclosure backplate. Securely fasten the wires to the
strain relief flange running between the AM25T terminal strips and install the
cover to reduce temperature gradients during thermocouple measurements.
