Installation and Operating Instructions
Contents
1. 12 3 4 X Error Messages during Measurement 19 3 5 Symptoms Faults during Start up or Measurement 14 SECTION 4 COMMUNICATION s rnnnnnvennnnnnennnnnnnennnnnnnennnnnnennnnnnnennnnnnennnnnnnennnnnneennnnnnennnnnn 16 A RENNE 16 TVEN 16 al EE Cl saei uieeierier emm Nd CUM d UM ed roe 18 12 Ke lelni i i cR TIT 18 4 1 3 Multidrop Communication a 18 j PORN 20 4 2 1 Software Installation a 20 4 2 2 Table or Configuration Parameters 20 4 2 3 Software Configuration Examples 24 4 2 4 Software Parameter Descriptions 26 4 2 5 General Status Message 33 4 2 6 Transmitter specific Status Messages 33 EDO 8 02 242 DR1200 LM Table of Contents SECTION 5 MAINTENANCE nnnwnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnennnnnnnennnnnnnennnnnnnennnnnnnennnnnnvennnn 35 5 1 Identifying a Problem rrrrnnnennnnrvnnnnnnnnnnnnnnernanenn2. For very high temperature applications with single cable construction ON Long and small diameter nozzle installation mini mum recommended flange four inches or see item 2 below Maximum nozzle height based on its diameter The calculation is h Lxd 140mm 4xa L Probe length mm d Nozzle diameter mm a Flange eccentricity from tank center mm Cement limestone flyash alumna etc Acids Liquid sugar honey syrups DR1200 TDR Level Instrument SECTION 2 INSTALLATION 2 1 Unpacking Carefully remove the contents of the shipping carton and check each item against the packing list before destroying any packing material If there is a shortage or damage report it to the factory immediately When handling the DR1200 TDR instrument avoid hard blows jolts impacts 2 2 Installation Considerations 2 2 1 Measured Variable distance level volume Input 2 2 2 Measuring Range Input 2 2 3 Dead Zone Input The primary measured variable 1s the distance between a reference point e g tank mounting flange and a reflecting surface e g surface of the level Volume measurements are possible by entering a conversion table maximum 20 points The strength of the reflected signal can be measured for qualitative assessment of the process material Only available with HART communication 0 5 to 80 feet Minimum tank height is 0 5 feet The useful range depends on
3. Input of the full scale range for output to the current output Input is dependent on the selected function of the current output The values for level and distance include the tank bottom and reference offset respectively Read only menu Software version of device Tag number of device Read only menu Unique serial number of the device The device ID HART protocol of the instrument is equivalent to this number Each device its individual address DR1200 TDR Level Instrument 4 2 2 Table of configuration parameters of PC STAR 2 Version 1 00 Configuration Parameter Parameter Range 1 4 6 Commission Number 1 4 7 Commission Number 1 4 8 Option 1 4 9 Probe Type Rod Rod Cable Cable and bottom weight Twin Cable Twin Cable and bottom weights Coax Special 1 Special 2 Special 3 1 5 0 Application 1 5 1 Detection Delay 1 6 0 Serial I O 1 6 2 Poll Address 0 to 15 1 7 0 Volume Table 1 7 2 Input Table From 0 to 20 points 0 point No table F11 Dynamic Configuration no function numbers displayed Threshold Level Pulse Distance 22 Default Value Description Read only menu Factory set Read only menu Factory set 16 bytes of ASCII characters Read only menu Probe type attached to the flange Forces the DR1200 instrument not to analyze reflections in a zone directly below the flange The entered value of the detection delay must be less the Dead Zone value Sets the address of the device For an addres
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5. 1234 Fax 215 674 2731 205 Keith Valley Road Horsham PA 19044 E mail deinfo drexelbrook com An ISO 9001 Certified Company Web www drexelbrook com EDO 8 02 242 DR1200 LM Table of Contents SECTION 1 INTRODUCTION nurnnnnnnennnnnnnnnnnnnnnennnnnnnnnnnnnnennnnnnnennnnnnnennnnnneennnnnnennnnnnnennnnnnnr 1 1 1 Product Description rrnnrnnnnrnvnnnnvnnrrnnanennanennnnnnnnnnrnvansnnanrnnnnnrnnnnennnnsnnnnsnnnnnsnnnnennnnsen 1 2 NNN 2 1 3 Probe Selection Guide Lune sdespedeskrkreEsande 3 SEGTION Z INSTALLATION susci E rd Cus x 4 X MEME See oM SE 4 22 Msialaton Ge SIGS OINS EE EE ER 4 2 2 1 Measured Variable Input 4 2 2 2 Measuring Range Input 4 223 Dead Zone MOU NN 4 2 2 4 Out of Range Performance Input 4 229 HARIO C mmu nications NNN 5 2 2 6 Service Diagnostics Output 6 2 9 Jhsbalatlom CU UNS uuu gnc ns cae ee eo EE ES 7 LA XE gom 9 2 4 1 Electrical EENet 9 SECTION 3 OPERAT ION uvenn 11 Go ee sn E EN E E E eee eee 11 3 2 Calculation of the Measured Value a a 11 3 3 Warning Messages during Measurement
6. Figure 4 1 specifies the minimum voltage at the terminals of the DR1200 instrument The voltage drop over the total loop resistance Ampere meter resistance R plus wiring resistance R plus HART communication resistance RE gr Should be considered for the calculation of the mini mum power supply voltage The voltage of the power supply has to be at a loop current of at least 20 mA V 20 mA x 250 ohms V 5V 10V 15V supply min20 input min20 In order to cover the full current range of 4 to 22 mA the voltage drop at 4 mA has to be verified V 4 mA x 250 ohms V 1V 18V 19V supply min4 input min4 With a loop resistance of 250 ohms a power supply voltage of 19 V is sufficient to supply the 4 to 20 mA range of the instrument Use the graph in Figure 4 1 to determine which safety bar rier can be used with the DR1200 instrument Most of the barriers are specified to deliver a minimum output voltage at 20 mA loop current V aan The output voltage at 4 mA must also be specified or it can be calculated with the value of the internal series barrier resistance Use only converters with HART barriers The PCSTAR 2 software or the HART communication tools will not operate if the converter is not equipped with this option 16 DR1200 TDR Level Instrument AGL Heyo WO A8L SWYO OGZ X 700 0 ejduex yup 1e paJinbaJ a ejon ASL eouejsisaJ doo x Vr r00 yup eDeyoA ulnulixp AGL Heyo wo A0L SWYO o9z X 20
7. block Use ferrules to protect instrument To avoid ground loops the cable ends No polarity do not connect a cable shield at 3 Close the terminal compartment both cable ends Retaining screw For Ex XP applications only the intrinsically safe 2 wire loop must be connected to the terminal 1 and 2 The ground terminal and terminal 3 are not connected Ground Figure 2 6 Connector Wiring DR1200 TDR Level Instrument 2 DIN Connector Snap on plastic cable gland e Terminals conductor size 14 AWG maximum 1 5 mm maximum Ex equipotential bonding U clamp terminal 10 AWG maximum at neck of signal converter Cable entries 1x M16x1 5 with standard cable gland cable clamping area 4 to 8 mm Signal cable shielding possible current loop cable shield can be connected to ground Power supply 1 Remove the screw P and lift off the connector from the signal converter Put a screwdriver in F and separate N from R 3 Connect the current loop to terminals 1 and 2 there s no polarity to respect Use ferrules to protect cable ends Terminal 3 remains non connected Re assemble N and R 5 Put the seal in place connect R to the signal converter and screw P The earth terminal E 1s directly connected with the signal connector housing and also with the flange system of the instrument In order to avoid earth current loops a possible cable shield must not be connected at both cable end
8. can be verified Restarts the software DR1200 TDR Level Instrument 4 2 3 Software Configuration Examples Example 1 The measurements correspond to the menu parameters in the PC STAR 2 software Dead Zone Fct 1 1 2 20 mA eee 0 Xm m m m Detection Delay Fct 1 5 1 Gmm e mm mm m m m m m m m s m w s X uma mama e mmm mama ms w 0 1 2 3 4 Tank Height Fct 1 1 1 Probe Length Fct 1 1 6 Measuring Range eee i eee non measurable zone level reference point A Minimum recommended distance between Detection Current output measuring range KE Delay Funct 1 5 1 and Dead Zone Fct 1 1 2 6 inches Level Configuration Example Fct 1 3 1 Level 0 Current output range is smaller than the measuring range 1 Current output range is equal to the measuring range Min Scale 4mA tank height probe length 4 inches Max Scale 20mA tank height dead zone 2 Current output range is bigger than the measuring range Min scale 4mA 0 0 Max scale 20mA tank height dead zone 3 Current output range is bigger than the measuring range Min scale 4mA tank height probe length 4 inches Max scale 20mA tank height 4 Current output range is bigger than the measuring range Min scale 4mA 0 0 Max scale 20mA tank height NOTE For distance measurement the reference point is the bottom surface of the fl
9. drexelbrook com Be prepared to provide the Service Engineer with the model number application requirement and the materials being measured In standard applications maintenance 1s not necessary However if the sensor is strongly contaminated or coating on the sensor 1s heavy the DR1200 instrument might pro duce an erroneous output or can fail Consult factory 5 2 Replacement of the Signal Converter WARNING Always disconnect power before removing the signal converter Before replacing the signal converter in a hazardous location ensure that there 1s no danger of explosion 1 Disconnect all cables from the instrument WARNING On pressurized tanks do not in any case remove the four flange screws connecting the DR1200 flanges with the tank 2 Remove the four Allen screws shown in Figure 5 1 Allen key size 4 mm and lift off the signal converter The flange unit will remain tight even on pressurized tanks 35 DR1200 TDR Level Instrument 5 2 Replacement of the Signal Converter cont Flange Screw Flange Screw 9 Do not remove Do not remove Four Allen screws Figure 5 1 Replacing Signal Converter 3 Install the new DR1200 signal converter Handle the signal tip with care 4 Screw the four Allen screws Figure 5 1 to tighten the signal converter Allen key size 4 mm 5 Check power voltage 6 Reconnect all cables 1n the terminal compartment 7 Ensure
10. multidrop configuration 50 Ohms 24VDC HART Master or 275 Communicator 19 DR1200 TDR Level Instrument 4 2 PC SOFTWARE 4 2 1 Software Installation Refer to 4 1 Loop Requirements The PC STAR software is contained on one floppy disk It is compatible with Windows 95 or 98 4 2 2 Table of configuration parameters of PC STAR 2 Version 1 00 Configuration Parameter Parameter Range Default Value Description 1 0 0 Operation 1 1 0 Base Parameter 1 1 1 Tank Height Min value Probe Length 1000 feet Distance between the Max value 196 850 feet bottom of the tank and lower flange surface 1 1 2 Dead Zone Min value 0 feet based on Prevents measurements Max value Probe length probe length near the flange Measurement may not be precise in an area less than the recommended value 1 1 3 Time Constant Min value 1 second 5 seconds Filters possible signal Max value 100 seconds fluctuations when the product surface is turbulent 1 1 6 Probe Length Min value 0 feet This value has to be equal Max value Tank height to the exact length of the and lt 88 6 feet probe Change this value only if the probe length changes 1 2 0 Display 1 2 4 Length Unit m cm mm inch feet feet Level distance unit optional unit The selected unit is only valid for the length values The optional unit allows the user to define a new unit name and factor see Optional Unit menu 1 2 5 Volume Unit m3 m3 Unit for conversion
11. order to mask noise This value has to be smaller or equal to the value of the dead zone Detection delay is useful for elimi nating reflections due to the nozzle F11 Dynamic Configuration The amplitude and the amplification of the level pulse give an indication whether the device is following the correct pulse For a product with an Epsilon R gt 80 the amplifica tion factor should be 0 or 1 depending on the probe type For an Epsilon R lt 10 the amplification factor should be 2 or 3 gain 2 or 3 Factory setting is recommended Some applications where reflections occur due to nozzles etc might require a higher threshold setting NOTE If possible do not have a full tank when setting the Threshold 30 DR1200 TDR Level Instrument 4 2 4 Software Parameter Descriptions cont Dynamic Configuration cont Threshold Threshold masks non valid signal reflections e g heating tube The DR1200 measures only those pulses with an am plitude above the threshold The amplitude of the signals is linked to the dielectric constant of the product Initial Pulse Threshold Level Signal Flange Non valid signal VN To set the threshold correctly 1t 1s necessary to know approximately the amplitude of all sienals along the probe level signal and also non valid signals using an oscilloscope Default value for threshold is 200 mV Gain 3 The minimum threshold is 50 mV Gain 3 The max
12. parameters values from the second bank 1 If the DR1200 indicates only a problem with the first bank then it has succeeded to get all the parameters from the second bank In this case the device can measure Start up Error Refer to Bank 0 Restart the device several times Start up Error Refer to Bank 0 Restart the device several times Sampling audio signal error The electronics is not getting a valid image of the audio signal The measurement could be incorrect Hardware problems with the signal front end amplifier One of the four amplifications is not working correctly 13 DR1200 TDR Level Instrument 3 4 Error Messages during Start up or Measurement Cont Definition of Message Problem with the electronic offset of the signal Status Message Offset Error Positive Voltage Error 3 Volts power supply is out of limit Negative Voltage Error 3 Volts power supply is out of limit VCO1 Voltage Error Problem with the time base VCO2 Voltage Error Problem with the time base Delay Out of Limits Problem with the time base Reference Not Found Problem with the time base Flange Not Found Problem with the time base Mechanical problem bad Update Failure 3 5 Symptoms Faults during Start up or Measurement Symptom Fault Current Output Value lt 4mA Current Output reads 22 mA Current ouput reads 22 mA cont contact between the converters electronic block and the flange connection The DR1200 is not abl
13. that the seal of the signal converter 1s well greased 5 3 Telephone Assistance If you are have a question about your Drexelbrook equip ment call your local Drexelbrook representative or the factory toll free 1 800 527 6297 Please have as much of the following information as possible when you call Instrument Model P O Date Insertion Length Application 36 DR1200 TDR Level Instrument 5 3 5 4 Telephone Assistance cont Equipment Return Material being measured Temperature Pressure Agitation Brief description of the problem Checkout procedures that failed In many applications sensing elements are exposed to haz ardous materials OSHA mandates that our employees be informed and protected from hazardous chemicals e Material Safety Data Sheets MSDS listing the hazardous materials that the sensing element has been exposed to must accompany any repair It is your responsibility to fully disclose all chemicals and decontaminate the sensing element To obtain a return authorization RA contact the Service department at 1 800 527 6297 US and Canada or 1 215 674 1234 International Please provide the following information Model Number of Return Equipment Serial Number Original Purchase Order Number Process Materials that equipment has been exposed to MSDS sheets for any hazardous materials Billing Address Shipping Address Purchase Order Number for Repairs Pleas
14. the sensor type the reflection properties of the process material the installation position and the presence of interfering reflections The dead zone distance 1s the minimum measured distance between the mounting flange reference point and the surface of the process material For twin probe K gt 10 12 inches For twin probe K lt 10 6 inches For single probe K lt 10 16 inches For single probe K gt 10 12 inches For coax system 0 for all K Avoid a nozzle length A greater than six inches Measurement B should not be less than three inches Measurement B should be greater than measurement A These are minimum values Default value is 16 inches DR1200 TDR Level Instrument 2 2 4 Out of range Performance Input When the level measuring range is exceeded including flooding the measured value remains at the dead zone If the measured value drops below the level range it remains at the set lower range limit distance tank height 2 2 5 HART Communication Output Figure 2 2 shows an overview of the digital communications output for the DR1200 TDR level instrument 4 mA HART 4to 20 mA HART imi HART COMMUNICATOR yer PC Te EJ PC STAR 2 or HART specific COMMUNICATOR ie software and operating devices HARTG Master Point to Point Multidrop Figure 2 2 DR1200 TDR Instrument Communications Output Options There are two ways of using the H
15. wall Mounted flat on the tank The accuracy of the 4 20mA output is 0 01 38 DR1200 TDR Level Instrument 6 0 Specifications cont Repeatability Repeatability 1s equal to half the value for the error of measurement Ambient temperature of signal converter and process temperature For the DR1200 the maximum and minimum temperature of the converter and the product are linked Process 30 C to 90 C Minimum converter temperature 22 C Converter 22 to55 C Minimum product temperature 30 C Maximum converter temperature 55 C Maximum flange temperature 90 C Storage temperature 30 C lt T lt 55 C Environmental class Installation in free air level DI according EN60654 1 Reference conditions Temperature 68 F Pressure 14 7 psi atmospheric Air humidity 65 Highly reflecting product e g water with calm surface Tank diameter gt 3 feet Mounted at least 12 inches away from tank wall Mounted flat on the tank Measured Value Resolution 1 mm 0 04 Transient Recovery Time The transient recovery time 1s determined by the parameter Time Constant 1 to 100 seconds The transient recovery time relative to 196 deviation from the steady state value 1s approximately 4 6 times the time constant However 1n the case of unusual rapid changes in level the transient recovery time may deviate from this specification Turn on characteristics turn on drift After the DR1200 has b
16. 1234 Fax 215 674 2731 205 Keith Valley Road Horsham PA 19044 E mail deinfo drexelbrook com An ISO 9001 Certified Company Web www drexelbrook com
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18. AMETEK Leader in DREXELBROOK Level Measurement For Assistance Call 1 800 553 9092 Outside North America 1 215 674 1234 Installation and Operating Instructions series DR1200 TDR Guided Micropulse Level Instrument for Two Wire Control Systems 215 674 1234 Outside North America 800 527 6297 US and Canada http www drexelbrook com e mail Service Drexelbrook com The DR1200 level gauge is designed solely for measuring the distance level volume and reflection of liquids solids and particulate materials The DR1200 level gauge does not form part of an overfill protection system Special codes and regulations apply to its use in hazardous areas Responsibility as to suitability and intended use of these level gauges rests solely with the user Improper installation and operation of our level gauges may lead to loss of warranty AME TEK Drexelbrook makes no warranty of any kind with regard to the material contained in this manual including but not limited to implied warranties or fitness for a particular purpose Drexelbrook shall not be liable for errors contained herein or for incidental or consequential damages in connection with the performance or use of material Copyright 2001 AMETEK Drexelbrook EDO 8 02 242 DR1200 LM series DR1200 TDR Guided Micropulse Level Instrument for Two Wire Control Systems T 9 US Sales 800 553 9092 y 4 E E K 24 Hour Service 800 527 6297 D R EX E L B R OO K International 215 674
19. ART communications protocol with a DR1200 readar instrument All versions with HART protocol can be operated with the PC STAR 2 PC program DR1200 TDR Level Instrument 2 2 5 HART Communication cont Output a As a point to point connection between the DR1200 and the HART Master equipment HART Master 4to20 mA Figure 2 3 Point toPoint HART amp Communication b As a multipoint connection multidrop with up to 15 devices DR1200 or other HART equipment in parallel on a 2 wire bus HART Master HART HART Device Device Figure 2 4 Multidrop HART Communication 2 2 6 Service Diagnostics Output Service information can be accessed using the following Current output error signal 22 mA Digital interfaces interrogation of error flags DR1200 TDR Level Instrument 2 3 Installation Guidelines The DR1200 TDR instrument is designed for field mounting It should be mounted in a location as free as possible from vibration corrosive atmospheres and any possibility of mechanical damage In case of direct exposure to sunshine a sunshade 1s recommended For convenience at start up mount the instrument ina reasonably accessible location Mounting See Figure 2 5 Twin Rod Cable 4 inch minimum Coaxial Single Cable Rod Cable 0 inch 12 inch minimum minimum Avoid bending gt No interference restrictions DR1200 TDR Level Instrument 2 3 Insta
20. aken from one or several of the following terminals RTS TXD DTR The voltage to GND at at least one of these terminals must be a minimum of 4 8 V in operation PC CAT must be used with the setting RTS not inverted the black Viator RS232 Interface to HART The serial interface must be capable of supplying a current of minimum 1 5 mA The power is taken from one or both of the following terminals DTR RTS The voltage to GND at at least one of these terminals must be a minimum of 4 V in operation The RS232 output of the PC DTR and RTS must be current limited to 10 mA e PC CAT must be used with the setting RTS inverted Pin assignment of above terminals 9 pin 25 pin GND 7 RTS 7 4 TXD 3 2 DTR 4 20 To successfully communicate between a PC and level instru ment via the current output an appropriate resistance in the 4 20 mA loop is necessary The current 1s modulated directly 1n accordance with the HART conventions The signal amplitude is proportional to the resistance and with an open loop or a too high load the signal breaks down A resistance of minimum 120 ohms is necessary for PC communication The HART conventions define a load of nominal 250 ohms minimum 220 ohms 4 1 3 Multidrop Communication The DR1200 instrument can be configured in a multidrop connection with up to 5 devices DR1200 or other HART equipment in parallel on a 2 wire bus HART Foundation allows up t
21. ange 24 DR1200 TDR Level Instrument 4 2 3 Software Configuration Examples cont Example 2 In order to be able to measure volume with the DR1200 instrument a conversion table volume table needs to be entered with the PC STAR 2 software or HART Calibrator Using the volume table various levels are allocated to specific volumes previously calculated or measured In the case of non symmetrical tanks e g tanks with dished bottom the accuracy of volume measurement depends on the number of entered level volume pairs The maximum number of pairs points that can be set is 20 the volume is linearly determined interpolated between 2 points The table is generally used for volume but can also be used for mass or volume flow To insert a new point into the volume table set the cursor on the previous point and simultaneously press Ctrl Insert To delete a point into the volume table set the cursor on the point and simultaneously press Ctrl Delete Volume table Unit volume Funct 1 2 5 m3 Input table PC STAR 2 Point Level Volume 0 20 ft 0 5 me 0 75 fi 10 qu 1 00 ft 1 5 me 5 60 ft 16 80 m Tank Height Fct 1 1 1 6 00 ft Probe Length Fct 1 1 6 5 80 ft Dead Zone Fct 1 1 2 0 40 ft Maximum measurable level 5 40 ft equivalent to a volume of 16 30 m3 tank height dead zone tank height probe length 600ff 040ft 6 00ft 5 80ft Note The real level can be measure
22. annennnnennnnrnnnnennnsnennanennnsrnnssnnnnsennnn 35 5 2 Replacement of the Signal NNN 35 5 3 Telephone Assistance a 36 ECU LP i u T m oF SECTION 6 SPECIFICATIONS annrannannnnnnnnnnennnnnnnennnnnnennnnnnvennnnnnennnnnnnennnnnvennnnnnnennnnnnnr 38 FM CSA CONTROL DRAWINGQ Q Q J 42 APPENDIX 1 Hart lodel 275 Calibrator eere eren nnn nnn 43 DR1200 TDR Level Instrument SECTION 1 INTRODUCTION 1 1 Product Description Converter 1 inch NPT connection Probe The DR1200 two wire TDR system is designed to measure the distance level volume and reflection of liquids slurries solids and particulate materials It can be operated on stor age process tanks and also on still wells The DR1200 measuring system consists of e the sensor system and the signal converter The DR1200 flange system contains the probe support and the process connection The compact signal converter contains e the Time Domain Reflectometry TDR measuring circuit and the signal processing system including the output signal 4 20 mA HART interface The signal converter can be separated from the sensor system under process conditions without loss of pressure or escape of product Figure 1 1 DR1200 TDR S
23. d between 0 20 ft to 5 60 ft When the level of the product is lower than the probe end the DR1200 indicates tank empty The DR1200 gives a level value between 0 ft and 5 60 ft but it can really give a measuring value between 0 2 ft to 5 60 ft The accuracy of the first 0 2 ft of the measurement 0 ft to 0 2 ft depends on the installation and probe type of the DR1200 Current output Function I Fct 1 3 1 VOLUME Range I Fct 1 3 2 4 20 mA Scaling 4mA Fct 1 3 3 0 50 m corresponds to 4mA Scaling 20mA Fct 1 3 4 16 80 m corresponds to 20mA Display Unit conversion Fct 1 2 5 m cubic meter 29 DR1200 TDR Level Instrument 4 2 4 Software Parameter Descriptions Choice of Units Level Distance Units Select Tank Height Fct 1 1 1 m cm mm inch ft optional unit The selected unit 1s also valid for display purposes and calculation of the following measurement parameters Dead Zone Fct 1 1 2 Probe Length Fct 1 1 6 Scaling 4mA value current output Fct 1 3 3 Scaling 20mA value current output Fct 1 3 4 The optional unit can only be used as a length unit Before selecting this unit enter the new unit parameters The name of the unit 4 characters The factor of the unit Conversion Units The conversion unit 1s used to convert the level measurement into a different unit usually volume It is possible to use a non linear function as a factor of the level Se
24. e Epsilon R is 1 00 air The level is calculated as the difference between tank height and distance All parameters excepted Delta T are acces sible via the digital communication menus 3 3 Warning Messages during Measurement Status Message Configuration Changed More Status Available Primary Variable Analog Output Fixed Analog Output Saturated First Start Tank Full Tank Empty Level Lost Definition of Message Configuration parameter was changed Command 48 must be executed to empty the status refer to Watch Status Device is set in Multidrop Mode Polling Address z 0 Fixed Current Mode is entered during Loop Test and DAC Trim During normal operation the maximum value for the analog output is 20mA The analog output saturation error flag is set in case the measurement exceeds the signal current output range This message appears only when the serial number is 0 or 16777215 The DR1200 indicates that the level is in the Dead Zone The tank is full The DR1200 indicates that the level is below the probe end The DR1200 makes a measure only to the end of the probe not to the bottom of the tank The DR1200 loses the level signal Message is displayed when there is no signal with an amplitude higher than the threshold value Measuring values are frozen If the mode 4 20mA error 22mA is selected then the current output is fixed to 22mA after the selected delay time 12 DR1200 TDR Level I
25. e include a purchase order even if the repair 1s under warranty If repair is covered under warranty you will not be charged Ship equipment freight prepaid to AMETEK Drexelbrook 205 Keith Valley Road Horsham PA 19044 COD shipments will not be accepted 3 DR1200 TDR Level Instrument SECTION 6 SPECIFICATIONS Application Mode of Operation system Structure Input Output Reference conditions Current output accuracy Distance Level Volume and Reflection measurement of liquids slurries solids and particulate material on storage and process tanks or containers made of metal or concrete and also still wells Micropulse TDR with digital signal processing Compact device Modular Design Measured variable Primary variables are distance reflection Derived variables are level volume Measuring range Minimum tank height is 6 inches Maximum measuring range is 78 7 feet Rate of change in level lt 10 min Ex 1 current output HART Type passive current sink Current Range 4 20 mA error 22 mA 4 mA constant for HART multidrop Temperarture drift to 100 ppm K typically 40 ppm K Accuracy linearity 0 05 rel 20 mA 25 C Supply voltage 20 30 V Load impedance 0 750 ohms Temperature 68 F Pressure 14 7 psi atmospheric Air humidity 65 Tank diameter gt 3 feet Highly reflecting product e g water with calm surface Mounted at least 12 inches away from tank
26. e to measure Cause Calibration of the current output is incorrect Connection of the device IS Incorrect No power supply An error has occurred Device isn t in start up phase 14 Corrective Action Executes the calibration with the specialist rights or contact Factory Service Check the connection between the device and the power supply The range 4 20mA error 22mA is selected Check the status by selecting F8 PC software or enter the Status menu for the HART Calibrator Wait 50 seconds If the current If the current value drops to a value between 4 and 20 mA and goes immediately back to 22mA call Factory Service DR1200 TDR Level Instrument 3 5 Symptoms Faults during Start up or Measurement cont Symptom Fault Cause Corrective Action Value at the current output Settings of the current output Configure output as described does not correspond to are incorrect in Analog Output parameter the value at the display Data communication via Communication parameters of Check computer setting digital interface is not the computer are set incorrectly polling address working Bad connection to the interface Check connection Current output value is lt 4mA Consult Factory Service Current output value is 22mA Device isn t in start up phase wait 50 seconds and try again If the problem persists contact Factory Service DR1200 indicates an DR1200 measures a non valid Increase the Detection Dela
27. easured automatically if the probe has been modified or cut If the DR1200 instrument cannot find the probe length then 1 The threshold is not set correctly Set it to a smaller value 2 The electronic offset is incorrect Service menu 3 The probe type selected is incorrect Service menu 4 The tank 1s not empty Consult Factory Address Fct 1 6 2 This parameter 1s used for entering valid addresses from 1 to 15 HART protocol If several devices are operated on one digital bus or via HART Multidrop each device must be set to an individual address under which it can then be ad dressed on the bus The default value is the address 0 32 DR1200 TDR Level Instrument 4 2 5 General Status Messages Status Message Configuration Changed More Status Available Primary Variable Current Output Fixed Current Output Saturated Definition of Mesasge Set whenever any configuration parameter is changed Set when command 48 should be used to read more status Set when Device is set in Multidrop Mode Polling Address does not equal 0 Fixed Current Mode is entered during Loop Test and DAC Trim During normal operation the maximum value for current output is 20mA While Process Value PV will work up to the Sensor Limits the analog output and its digital value is saturated at 20mA and the flag is set 4 2 6 Transmitter specific Status Messages Status Message Invalid selection Definition of Me
28. een switched on the current output is fixed to 22 mA during 13 seconds The current output 1s then driven to probe length until the level has been found Finally the current output approaches the measured value Full measuring accuracy 1s obtained after 46 seconds operating time with default parameters time constant 10 seconds 39 DR1200 TDR Level Instrument Specifications cont Effect of ambient temperature Protection category Shock resistance Vibration endurance limit EMC Physical Properties Relative Permittivity Temperature coefficient signal output Current output with HART signal lt 100 ppm C typically 30 ppm C lt 0 01 C typically 0 003 C The temperature has no effect on the measured value as the device carries out a regular self calibration The effect of temperature of the atmosphere above the liquid product results theoretically in Ippm C 0 0001 C for air Note Liquids generally have a high coefficient of cubic expansion organic liquids typically 0 15 C IP65 Resist to shocks according EN61010 8 2 0 5 J IEC 68 2 6 and pr EN50178 10 57 Hz 0 075 mm 57 150 Hz 1G The devices satisfy the requirements of EN 50081 1 EN 50082 2 Physical properties such as density viscosity conductivity relative permittivity magnetic properties etc have no effect on measurement results The relative permittivity 1s required to have a mini mum va
29. ge may not be precise or reliable Dead zone prevents measurements in this area The minimum value is equal to that shown in the following table Measurement may not be precise in an area less than this recommended value Unit and setting range same as selected for Tank Height Fct 1 1 1 2 DR1200 TDR Level Instrument 4 2 4 Software Parameter Descriptions Dead Zone Fct 1 1 2 cont Probe type Dead zone minimum value Rod 16 in 400 mm Cable 16 in 400 mm Twin cable 12 in 300 mm Coax 0 in 0 mm Probe Length Fct 1 1 6 This value has to equal to the exact length of the probe This parameter is changed only if if the probe length is changed Unit and setting range same as selected for Tank Height Setting range for probe length 1s 0 000 to 10 000 feet The probe length set at this point in the configuration is the upper limit of the setting range for the following parameter Dead Zone Fct 1 1 2 The probe length set at this point in the configuration is the lower limit of the setting ranges for the following parameter Tank Height Fct 1 1 1 NOTE An automatic calculation of the probe length can be performed in the dynamic configuration menu Time Constant Fct 1 1 3 The measurement is filtered with the time constant to avoid abrupt changes in measured values and also in the current output value The setting range is 001 to 100 seconds Default value and recommended setting 1s 5 seconds Current Out
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31. ice is in research mode or if it is executing a function Command sent to the device is not implemented in the device 33 DR1200 TDR Level Instrument 4 2 6 Transmitter specific Status Messages cont Status Message Definition of Message First Parameter too high Some parameters are handled in pairs The two first member of the pair too high members are updated at the same time When one of the following messages appears one of the members is First Parameter too low incorrect The parameter pairs are first member of the pair too low Tank height Probe length Dead zone Detection delay Second Parameter too high Threshold value Threshold distance second member of the pair too high Optional unit name Optional unit factor Offset of measure Period of measure second Parameter too low Electronics Calspeed Mechanical calspeed second parameter of the pair too low Epsilon R Set value of Electronic offset 34 DR1200 TDR Level Instrument SECTION 5 MAINTENANCE 5 1 Identifying a Problem Use the Error Warning Message Tables and the Fault Symptom Table in Sections 3 and 4 to help find and correct a problem if it occurs It 18 important to be methodical when tracking down a problem If you have questions about the DR1200 TDR Level instru ment call Drexelbrook Factory Service at 1 800 527 6297 or e mail at service drexelbrook com Additional service infor mation can be found at www
32. imum threshold is 2500 mV Gain 0 Gain Amplification 0 1 05 1 2 10 2 457 3 8 93 The signal level is amplified according to the amplitude of the signal With Gain 0 the signal is not amplified With Gain 3 the signal is amplified almost by 9 The DR1200 automatically changes the gain factor It tries to keep the good amplitude of the level signal constant in order to track the pulse The threshold is recorded with the same amplification factor as the signal level If the signal level gain is 1 the threshold is recorded with gain 1 also If the threshold is set to 500 mV the DR1200 records the values 500 mV and Gain 1 If the signal level is getting smaller the DR1200 changes the gain to 2 and the signal is amplified 31 DR1200 TDR Level Instrument 4 2 4 Software Parameter Descriptions cont Threshold cont Serial I O Fct 1 6 0 Gain 2 Gain 1 Threshold When the signal level gain changes the threshold remains 1n both rises approximately at a level of 50 signal amplitude As the distance between the flange and the product surface rises the amplitude of the reflected pulse gets smaller The threshold adapts automatically Input Distance It is not recommended to change this parameter Input Distance forces the pulse to be found in a certain zone It is used only if the DR1200 instrument doesn t find the surface after entering a reliable value Search End of Probe The probe length can be m
33. lect Volume Unit Fct 1 2 5 m3 liter e US gal ft3 bbl petroleum barrels kg ton US ton Kg e m3 h e ft3 h 26 DR1200 TDR Level Instrument 4 2 4 Software Parameter Descriptions Choice of Units cont Tank Height Fct 1 1 1 Dead Zone Fct 1 1 2 Conversion Units cont The selected unit is also valid for the following parameters Scaling 4mA value current output Scaling 20mA value current output Conversion measurement requires a conversion table entered with the PC Star 2 software or HART Calibrator Using this table a conversion value is allocated to each level value level conversion pairs The values are linearly interpolated between 2 points The entered value is a fundamental variable for the calcula tion of level measurement and it is equivalent current value Tank height is the distance between the bottom of the tank and lower flange surface The value must be greater than the probe length parameter setting The minimum and max1 mum values are 0 000 to 196 850 respectively Factory de fault value is per the sales order The DR1200 instrument does not measure beyond its probe length For tank height select the following Unit e Setting ranges The tank height setting 1s the upper limit of the setting range for the following parameter Scale I Max Fct 1 3 4 The tank height must be greater or equal to the probe length Measurements near the flan
34. llation Guidelines cont For best results mount the DR1200 radar instrument without a nozzle and directly mounted in a 1 inch NPT welding socket Avoid a nozzle length A greater than 6 inches Measurement B should not be less than 3 inches Measurement B should be greater than Measurement A When mounting in an agitated vessel or stilling well Fix or center the end of the probe Avoid touching the side vessel wall or stilling well DR1200 TDR Level Instrument 2 4 Wiring 2 4 1 Electrical Connection The electrical connection for supply power is made in the terminal compartment of the signal converter CAUTION When using in a hazardous area only certified intrinsically safe equipment may be connected to the DR1200 instrument Two versions of the electrical connection are available see Figures 2 6 amp 2 7 1 NPT connector inch ISO16 e Terminals conductor size 16 AWG maximum High Integrity Ground U clamp terminal 10 AWG maximum at neck of signal converter e Cable entries inch NPT with standard cable gland cable clamping area 8 to 10 mm Signal cable shielding possible current loop cable shield can be connected to ground 1 Remove the four retaining screws and Ground is directly connected with open the terminal compartment the signal connector housing and 2 Connect the current loop to the also with the flange system of the terminal
35. lue in order to ensure reliable measurements The relative permittivity of the product determines the strength of the reflected signal Measurement results are not affected as long as the reflected signal is strong enough but reliability and the maximum measuring range are dependent upon the relative permittivity Minimum permittivity de pending on the type of probe being used is Single ds Twin gt 1 8 Coax gt 1 5 40 DR1200 TDR Level Instrument Specifications cont Maximum Operating Pressure The maximum allowable operating pressure for the standard version is 58 psig 580 psig optional Weight Sensor Type Signal Converter Extra Weight plus 3 28 feet probe per 3 28 feet approximate Single Rod 4 5 lbs 0 5 lbs Single Cable 4 5 lbs 0 25 lbs Twin Cable 4 5 lbs 0 5 lbs Coax 6 5 lbs 0 28 lbs Materials of construction Signal Converter Housing Aluminum with electrostatic powder coating to DIN 55990 3 Flange 1 inch NPT standard all other flanges on request Materials 1n contact with the product Stainless steel 316 for the cable Hastelloy optional Stainless steel 316 L standard for all the process connections consult fa ctory for options PTFE Viton O Ring Kalrez optional 41 DR1200 TDR Level Instrument 1 OF 1 420 0004 126 SHT NO FM Control Drawing 9c1 v000 0cr 00c18H0 YOH ONIMVHO 1OBLINOO VSO NH polit SNGILOVYS 500
36. n non viscous liquids 1 Connection size is less 1 than three inches 2 Liquid movements acting 2 like stillwell 3 Liquid or vapors spray 3 near the probe 4 Flow inside vessel like oil water separators 5 Can be heat tracing 6 Contact with metallic part or tank wall 7 High magnetic field around 8 CE approval in plastic tanks 9 Very low dielectric liquids 10 Foam applications For high silo or tank with liquid or granules Same as rod but over20 1 and up to 80 feet For smaller tanks with no clearance for rigid probe 2 For side installation with bent type DR1200 maxi 3 mum 20 feet on liquid Single Cable or Rod For all fine powder applica tions For all fine powder appli cations greater than 20 feet For all very viscous liquids like liquid sugar To build a coax version with an existing stillwell calibration required Very corrosive liquids with FEP coating Crystallizing acids with FEP coating Non Recommended Applications 1 Crystallizing liquids 1 2 Severe coating 3 Powders 2 Tanks less than 20 feet 2 LPG LNG Solvent 2 NH3 Fuel oil Foam Alcohol Oil Water 3 separators displacer open channel measure ment thread connection installation Small connection flange 1 with nozzle Agitated tank without anchoring Application Examples Tank farm 1 LPG LNG NHS spheres beer alcohol
37. n the threshold will be x mV gain factor 2 If the level pulse amplification changes the threshold automatically changes the gain setting Changing the Distance Input parameter is not recommended Consult Factory Input Distance Search Probe End Add Point to Volume Table 0 20 points 0 point to insert a new point set the cursor on the previous point and simultaneously press Ctrl Insert Delete Point to the Volume Table to delete a point set the cursor on the previous point and simultaneously press Ctrl Delete Test Output 4mA 12mA 20mA Other Reset DR1200 Ctrl Alt Delete 23 Forces the DR 1200 instrument to search for the product surface ina particular zone If there is no level signal enter an estimated value If you are sure of what your indication should be and there is still no reading contact the factory about decreasing the Threshold value Automatically measures the probe length Defines the strap table The 4 mA current output in volume is the first value in the table Each subsequent value must be greater than the previous one The length and volume units can be changed later without affecting the settings in the table Calculations are done automatically in the instrument Deletes the strap table The number of points are reset Tests the current output For test purposes the output can be set to one of the listed values Witha reference ammeter the calibration of the current output
38. nstrument 3 4 Error Messages during Measurement Status Message EEPROM Error RAM Error ROM Error Checksum Error Bank Customer 0 Check sum Error Bank Factory 0 Check sum Error Bank 1 Check sum Error Factory 1 Digitizing Error Gain Error The following table lists the error meassages that can trigger the current ouput to be set to 22 mA if the mode 4 20 Error22 1s selected Measuring values are then frozen Consult Factory Service Definition of Message Start up error Problem with non volatile memory Start up Error Problem with internal microcontroller memory Start up Error Problem with internal microcontoller memory Start up Error Problem with the EEPROM or with the parameter that recalls the saved EEPROM Parameters are saved in a non volatile memory EEPROM There are 4 banks two for each type of parameters customer or factory If there is a problem with the first bank 0 then the DR1200 gets the parameters values from the second bank 1 If the DR1200 indicates only a problem with the first bank then it has succeeded to get all the parameters from the second bank In this case the device can measure Start up Error Problem with the EEPROM or with the parameter that recalls the saved EEPROM Parameters are saved in a non volatile memory EEPROM There are 4 banks two for each type of parameters customer or factory If there is a problem with the first bank 0 then the DR1200 gets the
39. o 15 devices to be connected 18 DR1200 TDR Level Instrument 4 1 3 Multidrop Communication cont All instruments in multidrop mode must have previously been configured with addresses different from each other address must not be 0 because 0 is an address used only for point to point mode where 4 20mA output is valid In mulitdrop mode only digital information is used 4 20mA output is not valid in this case the current output of each instrument is set to 4mA 1 Configure each instrument in point to point mode Set the address of the device do not use 0 2 Multidrop the connection of up to 5 devices DR1200 or other HART equipment in parallel on a two wire bus HART Master During start up in a multidrop configuration each DR1200 instrument draws a current of 22mA for 25 seconds then the instrument drops to a fixed value of 4mA Looking at an example of the start up and assuming that five DR1200 instruments are connected there would be a current draw of 5 x 22mA 110mA for 25 seconds Adding the 250 ohm resistor to the equation and the constant power supply voltage 24V voltage drop across the resistor 110mA x 250 ohms 27 5V Because the laws of electricity limits the the current draw to 96 mA 24V 250 ohms Drexelbrook recommends starting each DR1200 instrument individually one at a time or short circuiting the resistor during start up in order to successfully start up in a
40. on table and smaller than the Scale 20 mA parameter value Scale 20 mA Fet 1 3 4 This parameter is used for I 20 mA to define the upper value for level or volume For distance or ullage vol ume measurement the reference point is from the bottom surface of the flange Scale 20 mA is the lower value When configuring level this value must not be greater than or equal to tank height When configuring volume this value must be greater than or equal to the maximum value 1n the conversion table and smaller than the Scale 4 mA parameter value Device Number Fct 1 4 4 Tag name of the device can be displayed using eight ASCII characters NOTE Not all the characters can be used Tag name Descriptor and Message are recorded 1n a spe cial format Packed ASCII 29 DR1200 TDR Level Instrument 4 2 4 Software Parameter Descriptions cont User Data Fct 1 4 0 cont Application Fct 1 5 0 Serial Number Fct 1 4 5 Identification of each DR1200 instrument Serial number cannot be changed This number defines the Device ID of the HART Long Address Release Number Release Number of the device Software and Hardware versions Probe Type Fct 1 4 9 Probe type attached to the flange Checksum Fct 1 4 10 ROM Checksum Detect problems with the microcontroller A test of this checksum is performed at each start up Detection Delay Fct 1 5 1 Detection Delay defines a zone below the flange signal in
41. put I Fct 1 3 0 Current 1 item Fct 1 3 1 Use this parameter to select the measured variable Settings for Parameter 1 are Off The output sinks a constant current of 4 mA Analog output parameters cannot be selected Go to User Data Level Distance Volume Volume Unit 28 DR1200 TDR Level Instrument 4 2 4 Software Parameter Descriptions cont Current Output I Fct 1 3 0 cont 100 20 mA 0 4 mA 0 4 mA 100 20 mA DISTANCE User Data Fct 1 4 0 Current 1 range Fct 1 3 2 Use this parameter to define the current output value during an error condition E error at 22 mA Settings for Range 1 are 4 20 mA hold last measured value when error occurs 4 20 mA E 22 mA Error Delay Fct 1 3 5 This parameter is available on the HART Calibrator when 4 20 mA E 22 mA is chosen It sets a delay before switching the current output to 22 mA After the problem occurs and before the end of the delay the measurement value and also the current value is frozen Scale 4 mA Fct 1 3 3 This parameter is used for I 4 mA to define the lower value for level or volume scaling 4mA For distance or ullage volume measurement the reference point is from the bottom surface of the flange Scale 4 mA is the upper value When configuring level this value must be less than Scale 20 mA parameter value When configuring volume this value must be less than the maximum value in the conversi
42. s Figure 2 7 DIN Connector Wiring 10 DR1200 TDR Level Instrument SECTION 3 OPERATION 3 1 3 2 Start up Calculation of the Measured Value After the DR1200 TDR instrument has been switched on the current output is fixed to 22 mA during 13 seconds The current output is then driven to probe length until the level has been found Finally the current output approaches the measured value Full measuring accuracy is obtained after 46 seconds operating time with default parameters time constant 10 seconds Refer to Figure 3 1 The DR1200 instrument measures time between reflections and converts it to a distance or a level information with the following formulas Delta T Calspeeds Offset Epsilon R Time between Initial Pulse and Level Pulse mS Electronic Calspeed x Mechanic Calspeed mS mm Distance between Initial pulse and bottom sur face of the flange mm Dielectric constant of first medium under the flange normally 1 00 Calspeeds Cm Figure 3 1 Calculation of the Measured Value DR1200 TDR Level Instrument 3 2 Calculation of the Measured Value cont The measured time between the initial pulse and the level pulse is translated in millimeters by the Calspeed setting This primary distance is corrected by the offset and then standardized to the reference point flange This primary distance is divided by the Epsilon R square root if there 1s only one product in the tank th
43. s different of 0 the device is set to multidrop mode In this mode the current output is fixed to 4mA Defines the strapping table The 4 mA current output in volume is the first value in the table Each subsequent value must be greater than the previous one The length and volume units can be changed later without affecting the settings in the table Calculations are done automatically in the instrument Put the cursor to the level edit box in and press CTRL INSERT in order to add a new point CTRL Delete to remove a point from the strapping table Press F6 to save the volume table To add or remove additional data points to the strapping table position the cursor on the last data point edit field then press CTRL Insert or CTRL Delete to remove This allows up to 20 points Read only value Dynamic value Distance of the level pulse DR1200 TDR Level Instrument 4 2 2 Table of configuration parameters of PC STAR 2 Version 1 00 Configuration Parameter Parameter Range Level Pulse Gain Level Pulse Amp Display and Set 200 mV Threshold Value gain factor CAUTION Default Value Description Read only value Dynamic value Amplification of level pulse gain 0 1 2 or 3 Read only value Dynamic value Amplitude of level pulse in millivolts Threshold of the level pulse in millivolts The threshold is set with the same gain factor as the actual level pulse gain If the level pulse gain factor is 2 the
44. ssage Bad item Passed parameter too large Value too large for the parameter Passed parameter too sma Too few data bytes In write protect mode Lower range value too high Applied process too high Not in proper current mode Cannot change active pass Table non monotonous Lower range value too low Applied process too low Upper range value too high Multidrop mode Illegal password symbol Upper range value too low Invalid units code Invalid function Invalid password Access restricted Invalid range units code Device busy Not implemented Value too small for the parameter Insufficient byte transmitted Protection against writing The value of the range is incorrect PV range values are incorrect method Apply values Current output is not fixed when DAC Trim is executed word Password is incorrect Volume table is not monotonous The value of the range is incorrect PV range values are incorrect method Apply values The value of the range is incorrect Cannot fix a value on the current output in the multidrop mode The characters of the passed password are incorrect Valid characters are E R or U The value of the range is incorrect The unit is not supported by the DR1200 instrument The result of the function is incorrect Cannot enter Specialist menu Password is incorrect If customer password is set parameter cannot be modified Range unit is incorrect Device is busy Normally it appears when the dev
45. values liter The selected unit is only used US gal to display the conversion value ft3 bbl ton US ton m3 h ft3 h 20 DR1200 TDR Level Instrument 4 2 2 Table of configuration parameters of PC STAR 2 Version 1 00 Configuration Parameter 1 2 6 Define New Unit 1 2 6 1 Unit Name 1 2 6 2 Unit Factor 1 3 0 1 3 1 1 3 2 1 3 3 1 3 4 1 4 0 1 4 3 1 4 4 1 4 5 Current Output I Current 1 Range 1 Scale min Scale max User Data Checksum Device Number Serial Number Parameter Range 4 ASCII characters unit Min value gt 0 0 1 0 Max value 100000 Level Level Distance Volume Ullage Volume 4 20 mA 4 20 mA 22mA if Error 4 20 mA Min value 0 0 Max value Scale I max Min value Scale I min 10 000 feet Max value tank height number of default characters 21 Default Value Description Optional unit name Enter unit name before using it in the menu Optional unit factor Enter the unit factor before using it in the menu Current output function measured value to be displayed Current output range In error mode the current output is frozen except if 4 20 mA is selected then the current output is fixed at 22mA Input the lower range value for output to the current output Input is dependent on the selected function of the current output The values for level and distance include the tank bottom and reference offset respectively
46. y incorrect level value signal and Dead Zone with the same ratio or increase the Threshold level if the full measurement range is essential e Threshold level must be adjusted so that it masks the disturbances but also to give enough head room for the level pulse Very large pulses along the measurement signal same amplitude as the initial pulse can be caused by a probe which is touching the nozzle or the tank side see 2 3 Installation Guidelines The tank is empty and the A valid pulse was found Check the probe for disturbances DR1200 indicates a level such as heating tubes or product build up clogging Adjust the Threshold dynamic configuration menu The tank is full and the Threshold is not adjusted Adjust Threshold DR1200 indicates a level or empty tank The tank is not empty or Threshold is not adjusted Adjust Threshold not full and the DR1200 indicates an empty or full tank 15 DR1200 TDR Level Instrument SECTION 4 COMMUNICATION 4 1 Loop Requirements Safety Barriers nominal power supply voltage Ve Vde maximum pm I 35 Vdc minimum V put see graph in Figure 4 1 Input voltages above 35 Vdc or below the specified voltage may damage the instrument cause a fault measurement or trigger the instrument to reset loop resistance Roop Rnw KC able i R eter minimum Roop 0 ohms maximum Roop 750 ohms HART Communication 250 ohms resistor R rs recommended The graph in
47. ystem DR1200 TDR Level Instrument 1 2 Model Number Instrument DR1200 Internal code 4 Probe Construction Single Rod maximum length 10 Single Cable maximum length 80 4mm OD Coaxial maximum length 20 Twin Cable maximum length 80 Single Cable maximum length 80 8mm OD Material 1 316 SS standard for Cable probe 2 316L SS standard for Rod probe Connection ANSI Or WN 2 1 NPT C 3 150 3 1 1 2 NPT D 4 150 A 2 150 E 6 150 B 21 2 150 Length 0 0 5 17 B 3d G 50 1 3 6 20 C 36 H 93 2 T 7 23 D 40 K 96 3 10 8 26 E 43 L 59 4 13 A 30 F 46 M 63 Incremental Length 0 0 5 20 1 4 6 24 2 8 7 28 3 12 8 32 a 16 A 35 Pressure Rating 2 232 psi standard 3 580 psi Sealing 1 Viton 2 Kalrez Counter Weight 0 Without 3 D2 xL 10 8 mm cable solids 1 Di xL4 standard 5 Turnbuckle 2 D2 xL2 Twin Cable 6 Tie down clamps included Cable connection 1 DIN Connector snap on plastic cable gland 2 M 16 includes junction box 3 1 2 NPT includes junction box Application 1 Liquids 2 Solids Approvals 0 Without 2 FM 1 Cenelec Atex 3 CSA Precision 1 15 mm standard 2 5mm Flange Temperature 1 194 F 90 C standard 2 215 F 135 C Indicator 0 Without DR2000 4 0 00000 0 0 00 0 0 0 0 0 Q 414825 gz 66 69 3 76 80 DR1200 TDR Level Instrument 1 3 Probe selection guide Coax Twin Cables Recommended Applications Only for clea
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