920 Series RTD Transmitter

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SERIES	920	RTD transmitter
TYPE	NRT	Head-mounted
INPUT	2	PT-100, 3-wire
OUTPUTS	1	4 mA to 20 mA, 2-wire	2	0 Vdc to 5 Vdc, 3-wire	5	0 Vdc to 10 Vdc, 3-wire
CALIBRATED TEMPERATURE RANGE	Please specify low/high
UNITS OF MEASURE	C	Celsius	F	Fahrenheit
OPTIONS	0	None	PC*	Computer Programmable

* Required program module and software

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@Vnom = 24 Vdc, T.ambient = 25 °C, Span nom. = 100 °C

SPECIFICATIONS
Housing material	Die-cast Zinc, enamel painted
Housing dimensions	1.82" dia. x 1.15" H
Input	PT100, 3-wire, α=0.00385, DIN EN 60751
Output	4 mA to 20 mA loop powered or voltage, linear to temperature
Power supply	12-32 Vdc, polarity protected
Supply effect	0.02%/V, 0.001%/V with computer programmable version
Zero drift	±0.01% FS/ °C
Span drift	±0.01% FS/ °C
Long term drift	≤ 0.5% FS/year
Excitation current RTD	0.8 mA
Sensor lead resistance RTD	500 Ω max.
Accuracy¹	0.1% FS (includes effects of linearity, hysteresis and repeatability)
Span/zero adjustment	20 turn potentiometer, ±10% for zero and span
Maximum loop resistance	Rmax. = [ ( Vsupply – 9 Vdc ) / 20 mA
Open circuit detection	Overscale limit (27.0 mA) or underscale limit (2.2 mA)
Warm up	30 seconds
Temperature ranges	Ambient -40 °F to 176 °F (-40 °C to 80 °C) Storage -40 °F to 176 °F (-40 °C to 80 °C)

¹ Max. error on complete span. Error at calibration point ≤0.1 °C

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