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Related Manuals for DEVAR d-RTTI
Summary of Contents for DEVAR d-RTTI
- Page 1 DEVAR Inc. Model d-RTTI User Manual...
- Page 2 Introduction The Model d-RTTI is a room temperature indicator/transmitter that provides an accurate indication of ambient temperature with a numeric readout and a 4 to 20 mA output signal. In this manual you will find an overview of how to configure and operate this device.
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Page 3: Table Of Contents
Table of Contents General Description............ Physical Description........... Start Up Sequence............. Configuration.............. 4.1 Using the Buttons............ 4.2 Select Temperature Scale........4.3 Set Top of Range............ 4.4 Set Bottom of Range..........4.5 Set Offset..............Error Messages............Specifications............. Illustrations Fig. 1. General Dimensions..........Fig. -
Page 4: General Description
An option is also available that will accept its input from an external 1000 ohm platinum RTD sensor. The d-RTTI operates on a supply voltage of 10 to 28 Volts DC. This is a true two wire device with signal and power being provided over a single pair of wires. -
Page 5: Startup Sequence
4.0 Configuration To enter the configuration mode press all three buttons while powering up the unit or, while the d-RTTI is operational, press and hold all three buttons for approximately five seconds. The unit will enter the startup sequence by lighting all segments “8.8.8.8.” and then displaying “COnF”. -
Page 6: Using The Buttons
4.1 Using the Buttons Once in the configuration mode pressing the NEXT button steps you through each of the configuration prompts (F C, HI, LO and OFFS). Pressing the FUNC button selects the indicated function and displays its current value. For F C the display will indicate either ºC or ºF, pressing either the INCR or NEXT button will toggle the between the two. -
Page 7: Set Offset
4.5 Set Offset The Set Offset function is used to shift the temperature reading up or down by a small amount as a fine temperature adjustment. At the OFFS prompt press the FUNC button to select the item. A three digit number will appear with the leftmost digit blinking. Press the INCR button to change the value of the blinking digit. - Page 8 PRODUCT CODING Standard Unit: d-RTTI (Default Calibration) Custom Cal: d-RTTI - [Temp at 4 mA / Temp at 20 mA] Options: No Internal Sensor, unit accepts input from external 1000 Ohm plt RTD via TB. Add gray painted die cast aluminum housing.
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Page 9: Fig. 1. General Dimensions
1/2" 0.375 2.800 PLATE 3 9/32 4.700 SCREW RETAINER 0.760 HEATSINK GASKET Figure 1. General Dimensions... -
Page 10: Fig. 2. Rear Panel Wiring
LOAD POWER SPARE SUPPLY LOAD REMOTE NEXT INCR FUNC OPTION -R REMOTE SENSING Figure 2. Rear Panel Wiring... - Page 11 2.55 SWIVEL LUG HOLE DIA. 0.25" 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)
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Page 12: Fig. 4. Configuration Flowchart
TO ENTER CONFIGURATION POWER ON ON POWER UP, PRESS AND HOLD FUNC, INCR AND NEXT WHILE APPLYING POWER FUNC, INCR, and NEXT NEXT SET TEMPERATURE SCALE FUNC USE INCR OR NEXT TO TOGGLE BETWEEN ºF AND ºC; USE FUNC TO ACCEPT NEXT SET 20 mA TEMPERATURE FUNC... - Page 13 WORKMANSHIP FOR A PERIOD OF TWO YEARS. Should this product prove to be defective in material or workmanship during the warranty period, Devar Inc. will, 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.
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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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