AM25T

Frequently Asked Questions FAQs

Frequently Asked Questions: AM25T


  1. Can I connect the AM25T to an analog input channel on a device other than your datalogger, such as a programmable logic controller (PLC)?

    The AM25T was designed specifically to interface to Campbell Scientific dataloggers only, with no provisions to interface to third party devices.

  2. I use an AM25T and an AM416 connect with one CR10X. The AM416 works well but the AM25T works wrong. All the 23 107 probes' absolute peak value are bigger than the truth. That is, the daytime positive value is bigger by about 10 deg and the night time value is smaller by 10 deg.

    The AM25T uses solid state relays, which have a varying impedance from one closure to the next. This impedance is higher than the impedance in the mechanical relays used in the AM16/32(A & B) multiplexer. Bridge circuits (107/108 probes, PRTs, load cells, strain gages, pressure transducers, ETC.) should not be connected to the AM25T due to the varying and higher impedance values (compared to the AM16/32).


  3. I would like to use a multiplexer with a CR10X logger and very low sensor signals (1 mV and lower). Can I use an AM25T or should I use an AM16/32? For which sensor signal voltages and sensor impedances can I use the AM25T and the AM16/32?

    Bridge-type circuits (107/108 probes, PRTs, load cells, strain gages, pressure transducers) should be used with the AM16/32(A or B) to preserve measurement accuracy and repeatability. Voltage signals (thermocouples, thermopiles, high-level voltages) can be used with the AM25T multiplexer without any degradation to measurement accuracy or repeatability.




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