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DEVAR Inc.

Model d-RTTI

User Manual

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Summary of Contents for d-RTTI

Page 1: ...DEVAR Inc Model d RTTI User Manual ...

Page 2: ...erview of how to configure and operate this device The Model d RTTI includes the following features 4 Digit Red LED Temperature Display Fahrenheit or Centigrade Operating Modes 40 to 180 ºF or 40 to 82 ºC Operating Ranges Precision RTD Temperature Sensor Field Configurable 4 20 mA Temperature Output True 2 Wire Operation Push Button Configuration Fits Standard Single Gang Electrical Outlet Box Spl...

Page 3: ... 4 1 Using the Buttons 3 4 2 Select Temperature Scale 3 4 3 Set Top of Range 3 4 4 Set Bottom of Range 3 4 5 Set Offset 4 5 0 Error Messages 4 6 0 Specifications 4 Illustrations Fig 1 General Dimensions 6 Fig 2 Rear Panel Wiring 7 Fig 3 Option H gray painted die cast aluminum housing 8 Fig 4 Configuration Flowchart 9 ...

Page 4: ...ue two wire device with signal and power being provided over a single pair of wires 2 0 Physical Description The d RTTI enclosure consists of a beige 4 7 high by 2 8 wide by 3 8 thick plastic plate Captivated mounting screws and a gasket seal are provided to attach the unit to a single gang electrical outlet box The sealed front faceplate provides a measure of splash resistance for applications wh...

Page 5: ...ns for approximately five seconds The unit will enter the startup sequence by lighting all segments 8 8 8 8 and then displaying COnF Pressing any button at this point will produce the first Configuration Prompt on the list of configurable operating parameters below Configuration Parameters Prompt Operation Selects whether the temperature will be displayed in ºF or ºC Selects the temperature value ...

Page 6: ...n use the INCR or NEXT button to toggle between the two choices Press the FUNC button again to enter the selection and move on to the next prompt 4 3 Set Top of Range The Top of Range function is used to set the temperature value that corresponds to an output signal of 20 milliamps At the HI prompt press the FUNC button to select the item A four digit number will appear with the leftmost digit bli...

Page 7: ...ument will cause Err to be displayed and the unit will return to the edit screen so that the number can be re entered Setting the 4 to 20 mA output span span HI LO to a value of less than 35 ºF or 20 ºC will cause SPAN Err to be displayed press any button to return to the HI prompt so that the error can be corrected Setting the OFFS value to a number greater than 10 will cause Err to be displayed ...

Page 8: ... of Span per 300 Ohm Change DEFAULT CALIBRATION Display 40 to 180 ºF Loop 4 to 20 mA Represents 0 to 100 ºF FIELD CALIBRATION Display 40 to 180 ºF or 40 to 82ºC Output Loop The HI and Lo Milliamp outputs must be set to represent temperatures within the displayable range 40 to 180 ºF or 40 to 82ºC Output Limits Maximum milliamp span 220 ºF or 122 ºC Minimum milliamp span 35 ºF or 20 ºC Maximum offs...

Page 9: ...6 0 760 4 700 GASKET SCREW RETAINER HEATSINK 0 375 1 2 2 800 3 9 32 PLATE Figure 1 General Dimensions ...

Page 10: ...7 LOAD LOAD POWER SUPPLY REMOTE RTD OPTION R REMOTE SENSING PS PS SPARE NEXT FUNC INCR Figure 2 Rear Panel Wiring ...

Page 11: ...8 SWIVEL LUG HOLE DIA 0 25 2 55 1 2 NPT PORT THREE PLACES TOP BOTTOM AND CENTER BACK INCLUDES TWO 1 2 NPT PLUGS Figure 3 Option H gray paint die cast aluminum housing ...

Page 12: ... OPERATING MODE PRESS AND HOLD FUNC INCR AND NEXT FOR 5 SECONDS SET TEMPERATURE SCALE SET 20 mA TEMPERATURE SET 4 mA TEMPERATURE USE INCR TO EDIT FLASHING DIGIT USE NEXT TO SELECT DIGIT USE FUNC TO ACCEPT USE INCR TO EDIT FLASHING DIGIT USE NEXT TO SELECT DIGIT USE FUNC TO ACCEPT USE INCR TO EDIT FLASHING DIGIT USE NEXT TO SELECT DIGIT USE FUNC TO ACCEPT SET TEMPERATURE OFFSET FUNC INCR and NEXT F...

Page 13: ... at its discretion repair or replace the defective item at no charge to the customer Products that are damaged by accident misuse fire water lightning or other acts of nature are not covered under this warranty Also not covered is damage due to shipping installation incorrect wiring or any other cause not related to a product defect Unauthorized product modification repair or attempted repair or s...

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Page 16: ...DEVAR INC 706 Bostwick Ave Bridgeport Ct 06605 USA 800 566 6822 www devarinc com MODEL d RTTI Rev A ...

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