TDS Manual V2.0.qxd - Dwyer Instruments, Inc.
Contents
1. The TDS series flow switch when installed must always be in contact with the liquid being measured The flow switch feature a 3 4 NPT threads which will allow it to be used with various types of fittings Be sure to check the insertion depth of the flow switch in the fitting after it is installed See the diagram below for the recommended inser tion depth When using any type of fitting the orientation as well as the insertion depth of the flow switch in the pipe is critical See the diagram below for the recommended orientation depth A WARNING A The flow switch tips have a thin plastic wall which may be dam aged if dropped or installed improperly The TDS series flow switch is designed for use in liquid For best results avoid installing the TDS series where bubbles are present or where the tips of the switch may be out of the liquid WIRING WIRING Step Five Supply Voltage The supply voltage to the TDS series flow switch should never exceed a maximum of 36 VDC Use controllers or power supplies with a minimum output of 12 VDC or a maximum output of 36 VDC Required Cable Length Determine the length of cable required between the TDS series flow switch and its point of termination Allow enough slack to ensure the easy installation removal and or maintenance of the sensor The cable length may be extended up to a maximum of 1000 feet using a well insulated 14 to 20 gauge shielded four cond2. measures liquid temperature to determine changes in flow velocity As fluid flows across the sensing tips the temperature is reduced proportionately as a function of the flow rate When a temperature or velocity shift reaches the user defined set point the switch changes state indicating the appropriate flow condition flow or no flow Dwyer s sophisticated electronics convert the temperature shift into a signal which indicates whether a flow or no flow condition occurs Depending on how the sensor is wired this signal may be wired for normally open or normally closed circuits Dwyer s Thermal Dispersion flow switches have no moving parts to clog or foul making them suitable for a variety of applications including non coating and non scaling liquids The TDS series directly measure mass flow and can operate over a broad range of liq uids from 0 4 to 1 2 specific gravity 1 to 200 cp Initialization Sequence for TDS series Powering up the TDS series is different in water and in air When the flow switch is powered up while submersed the TDS series will immediately indicate flow before switching to its correct state When the flow switch is powered up while in air the TDS series will imme diately indicate no flow before indicating its correct state A time delay may be used to eliminate this initialization sequence Dwyer s thermal dispersion relay controllers feature a 0 to 60 second time delay for your convenience Step Four
3. 010 1 safety Temperature Pressure Derating 17 T 2 Unacceptable Range 2 2 075 L Acceptable Range k 050 8 025 L 00 00 20 40 60 80 100 Temperature Cj fj PVDF PP Thermal Dispersion Ultrasonic Level Switch LU10 Series 3 4 NPT K yf 3 4 NPT KE og 8 Cable 2 5m e re 2 1 54mm A I 2 8 71mm a 4 5 114mm 3 4 oe pa 3 4 NPT E 5 of 8 Cable 2 5m gn ag 0 7 19mm a4 1 3 32mm a all dimensions are Nominal Set Points The TDS liquid flow switch set point is factory calibrated to 0 2 fps below 1000 E 100 z 10 z 1 o4 a TDS Series Flow Switch TDS 2 Sensor Material 1 PP 2 PVDF Sensor Length 1 Short 2 Long Maximum Temperature Voltage Derating Maximum Current 100 Unacceptable Range oo oO D DA Acceptable Range DS Ambient Sensor Temperature Ci Q oO 18 24 30 Operating Voltage VDC 36 3 0 76mm Ohms Max Series Resistance TDS Series Volume vs Velocity on d ead eas 800 600 400 200 To convert feet sec to GPM please refer to the chart 10 8 Electrical Loading Limits Unacceptable Range Acceptable Range 18 24 36 30 Supply Voltage VDC INTRODUCTION INSTALLATION Step Three Technology The thermal dispersion flow switch
4. I O SHLD oo WHT LOAD 1 L g OBLK een er ener ee eee es 4 Normally Closed DC Load as a P Channel Output To wire as a NC P Channel output follow the directions below The Black wire connects to Positive of the power supply and the Red wire connects to Negative The Green wire is jumpered to the Black wire while the White wire is connected to the LOAD Jumper the LOAD back to the Negative to complete the circuit Flow Condition N osBLk Sensor m OGRN NC F O SHLD O O OWHT LOAD t ORED 4 H L i ss a e a 4 Normally Open DC Load as a N Channel Output To wire as a NO N Channel output follow the directions below The Red wire connects to Positive of the power supply and the Black wire connects to Negative The White wire is jumpered to the Black wire while the Green wire is connected to the LOAD Jumper the LOAD back to the Positive to complete the circuit Flow Condition Q ORED L oOGRN LOAD Sensor NO t O SHLD l oo H O WHT U OBLK 7 Normally Closed DC Load as a N Channel Output To wire as a NC N Channel output follow the directions below The Black wire connects to Positive of the power supply and the Red wire connects to Negative The White wire is jumpered to the Red wire while the White wire is connected to the L
5. NING the fitting beyond a maximum of 80 inch pounds torque Always The rating for the relay is 120 VAC 60 VDC 1A For CE check for leaks prior to system start up rated applications the relay rating is 60 VAC 60 VDC IA Dwyer s Thermal Dispersion flow switches are not recom mended for use with electrically charged application liquids For most reliable operation the liquid being measured may need to be electrically grounded SPECIFICATIONS Step Two Common Specifications Set point range Factory set point Repeatability Response time Set point adjust Viscosity range Supply voltage Consumption Contact type Contact rating Contact output Process temp Electronics temp Pressure Sensor rating Sensor material Cable jacket mat Cable type Cable length Process mount Classification CE compliance 04 to 3 fps 012 to 91 mps 2 fps 06 mps 5 of set point 1 10 seconds Potentiometer 1 200 centipoise 12 36 VDC 70 mA maximum 1 SPST relay 120 VAC VDC 1A CE 60 VAC VDC 1A Selectable NO NC F 32 to 140 C 0 to 60 F 40 to 140 C 40 to 60 150 psi 10 bar 25 C derated 1 667 psi 113 bar per C above 25 C NEMA 4X IP65 TDS1 PP Ryton TDS2 PVDF Kynar TDS1 PP TDS2 PFA Teflon 4 conductor 22 AWG shielded 10 3m 3 4 NPT General purpose EN 50082 2 immunity EN 55011 emission EN 61
6. OAD Jumper the LOAD back to the Positive to complete the circuit Flow Condition f OBLK i i Sensor H OGRN LOAD I NC SHLD O HS i OWHT l g i H ORED i Step Eight Set Points If the preset factory calibration is not adequate for your application follow the calibration steps listed below Note the switch s internal LED will be on when the switch detects no flow and will off when the switch detects flow 1 Install the fitting and flow switch as described in the Installation section of this manual Turn the flow switch and controller power on and adjust the flow rate to the application setting If the medi um to be sensed is likely to be subject to high temperature varia tions the flow switch should be set at the highest normal temper ature likely to be encountered 2 Locate the potentiometer knob at the top Potentiometer of the flow switch The red LED is visible Knob through the potentiometer If the LED is on slowly adjust the potentiometer coun terclockwise with a small flat head screwdriver until the LED turns off The adjustment is a single turn 270 poten tiometer The initial response time of the flow switch after adjustment is 1 to 10 seconds Adjust the potentiometer in slow increments and wait for the response If the LED is off slowly adjust the poten t
7. Warranty Service amp Repair If for some reason your product must be returned for factory ser Dwyer vice contact Dwyer Inc at 219 879 8000 to receive a Material Return Authorization number MRA providing the following information a 1 Part Number Serial Number Thermal Dispersion 2 Name and telephone number of someone who can answer technical questions related to the product and its application FI OW Switc h 3 Return Shipping Address 4 Brief Description of the Symptom T D S Se ries 5 Brief Description of the Application Owner s Manual Once you have received a Material Return Authorization number ship the product prepaid in its original packing to Dwyer Instruments Inc PO Box 373 102 Indiana Hwy 212 Michigan City IN 46361 Please include the information about the malfunction with your product This information enables our service technicians to process your repair order as quickly as possible E2 ae e C Version 2 0 1A All rights reserved WARRANTY Step One A About this Manual A Material Compatibility PLEASE READ THE ENTIRE MANUAL PRIOR TO The TDS series sensors are available in two different wetted materials INSTALLING OR USING THIS PRODUCT This manual Models TDS 1__ are made of Polypropylene PP with Ryton tips includes information on all models of Dwyer Thermal Dispersion Models TDS 2__ are made of Polyvinylidene Fluoride PVDF Make Flow Switches TDS ser
8. asives such as steel wool or sandpaper which might damage the surface sensor Do not use incompatible solvents which may damage the sensor s PP Ryton or PVDF plastic body Sensor Installation Follow the appropriate steps of installa tion as outlined in the installation section of this manual Testing the installation 1 2 Power Turn on power to the controller and or power supply Immersing the switch Immerse the sensing tip in its applica tion liquid by filling the tank up to the switches point of actua tion An alternate method of immersing the switch during prelim inary testing is to hold a cup filled with application liquid up to the switch s tip Test With the switch being fluctuated between wet and dry states the switch indicator light in the controller should turn on and off If the controller doesn t have an input indicator use a volt meter or ammeter to ensure that the switch produces the correct signal Point of actuation Observe the point at which the rising or falling fluid level causes the switch to change state and adjust the installation of the switch if necessary Step Ten This Space Left Intentionally Blank
9. ation below Flow Condition fe RED Sensor OGRN LOAD O NO l SHLD AC Power I eo ep WHT O f j woe p Switching a Normally Closed AC Load The Black wire connects to Positive of the DC power supply and the Red wire connects to Negative The LOAD can be attached to the Green wire and the Hot of the VAC power Connect the White to the Neutral of the VAC power see illustration below paj o aei 2g Not Used Shield Flow Condition OGRN LOAD O SHLD AC Power WHT o RED tO WIRING CALIBRATION Step Seven Wiring as a P Channel or N Channel output The TDS series relay output can be substituted for either a P Channel PNP sourcing output or a N Channel NPN sinking output Normally Open DC Load as a P Channel Output To wire as a NO P Channel output follow the directions below The Red wire connects to Positive of the power supply and the Black wire connects to Negative The Green wire is jumpered to the Red wire while the White wire is connected to the LOAD Jumper the LOAD back to the Negative to complete the circuit Flow Condition i ORED Sensor OGRN NO a
10. hed to either the Green or White wires Complete the circuit by either con necting the Green to VDC power or White to VDC power see illustration below Flow Condition TDC Series Controller O o Wag wa wad POWER INVERT DELAY INVERT DELAY e Hoo Z oo RELAY 1 RELAY 2 ac ie ac fT pa 2 on ano e 5 Nc S c 1 2 D no D DELAY E HASH on N orED o H i Sensor GRN LOAD kK NO SHLD OR I oo Q H OWHT LOAD d Z g OBLK o H Switching a Normally Closed DC Load The Black wire connects to Positive of the power supply and the Red wire connects to Negative The LOAD can be attached to either the Green or White wires Complete the circuit by either con necting the Green to VDC power or White to VDC power see illustration below Flow Condition i OBLK a ji Sensor z OGRN LOAD NC SHLD OR O O O i OWHT LOAD z ORED H j Switching a Normally Open AC Load The Red wire connects to Positive of the DC power supply and the Black wire connects to Negative The LOAD can be attached to the Green wire and the Hot of the VAC power Connect the White to the Neutral of the VAC power see illustr
11. ies Please refer to the part number locat sure that the model you have selected is compatible with the application ed on the switch label to verify the exact model which you have liquid To determine the chemical compatibility between the sensor and purchased its application liquids refer to an industry reference such as the Compass Corrosion Guide available from Compass Publications User s Responsibility for Safety phone 858 589 9636 Dwyer manufactures a wide range of flow switches and technolo gies While each of these sensors is designed to operate in a wide A wiring and Electrical variety of applications it is the user s responsibility to select a sen The supply voltage used to power the sensor should never exceed a sor model that is appropriate for the application install it properly maximum of 36 volts DC Electrical wiring of the sensor should be perform tests of the installed system and maintain all components performed in accordance with all applicable national state and The failure to do so could result in property damage or serious local codes i ae A Flammable Explosive and Hazardous Applications Proper Installation and Handling DO NOT USE THE TDS SERIES GENERAL PURPOSE FLOW Because this is an electrically operated device only properly SWITCHES IN HAZARDOUS LOCATIONS trained staff should install and or repair this product Use a proper A A sealant with all installations Never overtighten the sensor within WAR
12. iometer clockwise until the light turns on Then turn the potentiometer counterclock wise to bring the LED off at a reliable set ting Remember adjust the potentiometer in slow increments and wait for the response 3 Verify that the new calibration is correct by lowering the system flow rate below the set point and check to see that the red LED turns on Then increase the flow rate above the set point and ver ify that the red LED turns off accordingly TDS Series 0 2 fps os J EH 4 y MAINTENANCE Step Nine General The TDS series flow switch requires no periodic maintenance except to clean off any deposits or scaling from the sensor tip as necessary It is the responsibility of the user to determine the appropriate main tenance schedule based on the specific characteristics of the applica tion liquids Cleaning Procedure 1 Power Make Sure that all power to the sensor controller and or power supply is completely disconnected Sensor Removal Make sure that the flow is off and the pres sure is down prior to removing the TDS series flow switch Carefully remove the sensor from the installation Replace the sensor with a 3 4 NPT plug to insure that liquid does not leak out during this procedure Do not re install the flow switch if the threads are damaged Cleaning the Sensor Use a soft bristle brush and mild deter gent carefully wash the TDS series flow switch Do not use harsh abr
13. uctor cable Wire Stripping Using a 10 gauge wire stripper carefully remove the outer layer of insulation from the last 1 1 4 of the sensor s cable Unwrap and dis card the exposed foil shield from around the signal wires leaving the drain wire attached if desired With a 20 gauge wire stripper remove the last 1 4 of the colored insulation from the signal wires Signal Output Relay switching Allows the sensor to switch a small load on or off directly using an internal 1A relay 120 VAC VDC or CE 60 VAC VDC The NO NC status is set by the polarity of the voltage feeding the red and black wires The green wire is the common for the relay and the white wire is the NO or NC depending on the polarity of red and black Normally Open Wiring Red 24 VDC Power Supply Shield X Ground Multimeter Continuity Wiring to a Dwyer Controller TSP Series Controller Step Six Wiring the Relay Output The TDS series relay output can be wired as a dry contact to a VDC or VAC power source The TDS series does require 12 36 VDC power to operate the sensor and switch the relay All illustrations below identify a Dry switch state as the normal position of the relay Switching a Normally Open DC Load The Red wire connects to Positive of the power supply and the Black wire connects to Negative The LOAD can be attac
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