I have an RTD that lists the maximum temperature as being 600C. The maximum current is listed as being 1mA. However, I suspect this is just the maximum current to alleviate self-heating excitation currents and not the actual maximum current that the RTD can handle before burning out.
The reason is that I want to use this as a hot-wire anemometer and calculations using the dissipation constant provided estimate that passing a current of 25mA through the RTD would raise the RTD about 300C above ambient. So logic would seem to indicate that the RTD would be unharmed if I passed 25mA through it. Can anyone confirm this?
The reason is that I want to use this as a hot-wire anemometer and calculations using the dissipation constant provided estimate that passing a current of 25mA through the RTD would raise the RTD about 300C above ambient. So logic would seem to indicate that the RTD would be unharmed if I passed 25mA through it. Can anyone confirm this?