Dear all,
I'm trying to figure out the following situation:
A PT-100 temperature sensor is measuring water. When I measure the water temperature with a handheld sensor it measure about 40 degrees, the correct temp. as the water feels slightly above body temperature.
A PT-100 (4-20mA, 0-100 celcius) is giving analog value of 20000, which scales to about 70 degrees celcius.
The scaling and specifications indicate the analog value is correctly scaled, but the real temperature is much lower. What could be the problem?
I have looked at other threads (http://www.plctalk.net/qanda/showthread.php?t=79915) and documents which discuss wiring, but I don't know much about that. Is a real temp of 40 degrees and analog signal temp of 70 degrees indicating any wiring or other hardware problem?
Thanks for your help!
I'm trying to figure out the following situation:
A PT-100 temperature sensor is measuring water. When I measure the water temperature with a handheld sensor it measure about 40 degrees, the correct temp. as the water feels slightly above body temperature.
A PT-100 (4-20mA, 0-100 celcius) is giving analog value of 20000, which scales to about 70 degrees celcius.
The scaling and specifications indicate the analog value is correctly scaled, but the real temperature is much lower. What could be the problem?
I have looked at other threads (http://www.plctalk.net/qanda/showthread.php?t=79915) and documents which discuss wiring, but I don't know much about that. Is a real temp of 40 degrees and analog signal temp of 70 degrees indicating any wiring or other hardware problem?
Thanks for your help!