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Altek Model 311A Universal RTD Calibrator Manual

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    Page 1 Universal RTD Calibrator Model 311A • Simulate RTDS into smart transmittersWorks with a wide variety of models including Rosemount 3144 & Honeywell STT series • Universal compatability with process instruments Operates with devices that use pulsed excitation currents including PLCs, DCS and multi-channel recorders • Calibrate in °C & °F for your RTD typePlatinum 100Ω, copper 10Ωand 50Ω, nickel 110 and 120Ω Simulate from 0.00 to 500.00 ohms • Calibrate with laboratory accuracy±(0.01% of reading + 0.075...
    Page 2 General instructions Changing RTD typesEight RTD types or ohms may be selected to match the sensors and instruments in your plant. The symbol Alpha (α) is used to identify the particular RTD curve. The value is derived by dividing the resistance of the sensor at 100°C by the resistance at 0°C (α= R100°C/R0°C). For Pt 100 DIN/IEC/JIS this is 138.50/100.00 = 1.3850. This value is sometimes represented as 0.00385 or simply as 385. To change RTD types: 1) Turn the selector knob to the desired Metal (Pt, Cu,...
    Page 3 Simulate an RTD Source1) Set up the Model 311A for the correct RTD type (and temperature scale*). 2) Disconnect the input wires from the device to be calibrated or checked. 3) Connect the Model 311A to the device to be calibrated, being careful to observe proper connections for 2, 3 or 4-wire hookups. 4) Turn the digital pot to the desired output value. OutputWhenever source is selected the word SOURCE will appear on the LCD. SOURCE will flash when the Model 311A is measuring the external...
    Page 4 PN 1887711 Rev A April 2002 ©2002 Altek Industries, Inc. Specifications subject to change without notice. All rights reserved. Printed in U.S.A. Altek products are warranted to be free from defects in material and workmanship (excluding fuses, batteries and leads) for a period of three years from the date of shipment. Warranty repairs can be obtained by returning the equipment prepaid to our factory. Products will be replaced, repaired, or adjusted at our option. Altek gives no other warranties,...
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