RTD Company: Averaging RTDs

HVAC RTDs - Averaging
Temperature Limits		Moderate (M) Range RTDs
		-50 to 250 °C (-58 to 482 °F)
Element Resistance		100 Ohms at 0 °C with tolerances of :
		Class A +/-.06% @ 0°C
		Class B +/-.12% @ 0°C
		Class C +/-.5% @ 0°C
Temperature Coefficient		.0038500 Nominal Temperature Coefficient
		Class A: Change in T = +/-(.15°C + 002\|t\|)
		Class B: Change in T = +/-(.30°C + 005\|t\|)
		Class A: Change in T = +/-(1.3°C + 005\|t\|)
Time Constant		Six seconds maximum for 63.2% response to change in temperature per ASTM E644

Repeatability		Less than +/-.06% change in ice point resistance after 10 consecutive cycles between ice point and 250 °C

Long Term Stability		Less than +/- .02% ice point resistance shift after 1000 hours at 250 °C

Self Heating		10 mW/°C in water moving at 3 feet/sec.
Hysteresis		+/-.15% of Span Temperature

		Class 510 Bendable General Purpose	Configure
		Used to detect "average" temperatures in systems where point measurements are inadequate.

		Class 511 1/2 X 1/2 NPT Adj Compression Fitting	Configure
		Used to detect "average" temperatures in systems where point measurements are inadequate.

		Class 512 Welded Twin Thd Hex Fitting	Configure
		Used to detect "average" temperatures in systems where point measurements are inadequate.

		Class 513 Welded Process Thd Hex Fitting	Configure
		Used to detect "average" temperatures in systems where point measurements are inadequate.

		Class 514 Conduit Box	Configure
		Used to detect "average" temperatures in systems where point measurements are inadequate.