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Copyright, Notices and Trademarks

© 2004-2020 Azbil Corporation. All Rights Reserved.

While this information is presented in good faith and believed to 

be accurate, Azbil Corporation disclaims the implied warranties of 

merchantability and fitness for a particular purpose and makes no 

express warranties except as may be stated in its written agreement with 

and for its customer.
In no event shall Azbil Corporation be liable to anyone for any indirect, 

special or consequential damages. This information and specifications 

in this document are subject to change without notice.

Summary of Contents for JTD720A

Page 1: ...CM2 DST720 2001 Smart Multivariable Transmitter Model JTD720A User s Manual...

Page 2: ...ms the implied warranties of merchantability and fitness for a particular purpose and makes no express warranties except as may be stated in its written agreement with and for its customer In no event...

Page 3: ...y have occurred during transportation This equipment was tested under a strict quality control program before shipment If you find any problem in the quality specifications please contact an Azbil Cor...

Page 4: ...ation do not step on the transmitter as this may damage it or cause physical injury The glass indicator may break if hit with a tool or other object and cause physical injury Install the transmitter c...

Page 5: ...uring the manufacture of this transmitter Never modify the transmitter in any way In plant modifications may result in damage to the transmitter or to property and human safety Communication equipment...

Page 6: ...ate should agree exactly with your order Especially check the following Tag No TAG No Model No MODEL Production No PROD No Low and high limits of set range RANGE Supply voltage SUPPLY Explosion proofi...

Page 7: ...paratus for explosive gas atmospheres Part15 Electrical installations in hazardous area other than mines GB3836 16 2017 Electrical apparatus for explosive gas atmospheres Part 16 Inspection and mainte...

Page 8: ...2 1 Introduction 2 1 Environmental conditions 2 1 2 1 2 Environmental conditions for TIIS explosion proof transmitter 2 2 TIIS Explosion proof transmitter installation precautions 2 2 Special conditio...

Page 9: ...ing the design temperatue 3 8 3 2 8 Setting the temperature pressure correction 3 9 3 2 9 Checking or setting the static pressure elevation 3 10 3 3 Measurement 3 11 3 3 1 Flow Rate Measurement 3 11 C...

Page 10: ...2 7 Piping for gas or liquid flow rate measurement 2 9 Figure 2 8 Pipe for gas or liquid flow measurement 2 10 Figure 2 9 Piping for steam flow measurement 2 11 Figure 2 10 Wiring 2 12 Figure 2 11 Su...

Page 11: ...o static pressure fluctuation and temperature fluctuation as shown in the block diagram in figure 1 1 After compensation it transmits an output proportional to the mass flow the volumetric flow in Nm3...

Page 12: ...indicator optional The display unit of a digital indicator consists of the following Main display Sub display D H k g a G C 0 0 S T 0 0 0 M P 1 Figure 1 5 Digital indicator Main display The main disp...

Page 13: ...uare root Flow rate Note When the saturated steam compensation Options code F2 is selected is displayed in the right of C It is shown that it is calculated based on the vapor pressure in piping So whe...

Page 14: ...ctures of model JTD720A and communicator Azbil Corporation 1 4 Model JTD720A Smart Multivariable Transmitter OUTPUT mode D S P N m 3 H L O O P T E S T Displays LOOP TEST INPUT mode D S P N m 3 H I N P...

Page 15: ...al corresponding to the static pressure input signal 4 mA 0 for PP LRV and 20 mA 100 for PP URV This mode is used also for setting and calibration of the static pressure sensor setting and calibration...

Page 16: ...ns Precautions when changing the connected device While displaying dynamic values such as pressure Model CFS100 continues to communicate with the device in order to update these dynamic values If the...

Page 17: ...nmental conditions of the PC being used are stricter than the conditions above use the interface within the usage condition range of the PC 1 4 5 Conditions for Connected Devices 1 PC Check the Model...

Page 18: ...Functions Configurations and Structures of model JTD720A and communicator Azbil Corporation 1 8 Model JTD720A Smart Multivariable Transmitter...

Page 19: ...6 for gases and vapors or Users Guidelines for Installations for Explosive Atmospheres in General Industry which are technical recommendations from the National Institute of Occupational Safety and He...

Page 20: ...ameproof The terminal cover has at least 9 engaged threads The cover with or without window has at least 9 engaged threads The housing has at least 10 5 engaged threads Environmental conditions for fl...

Page 21: ...emperature limits If temperature should exceed the high limits install insulation and ventilation to maintain the effective operating temperature Figure 2 1 Name plate and conformance mark Reference d...

Page 22: ...bracket Mounting transmitter on a bracket using the four bolt holes on the reverse side of the pressure receiving part Fix the pipe firmly to the foundation and make sure that it is stable When you c...

Page 23: ...t in such a way as to set the pressure receiving diaphragm vertically After installation calibrate the zero point by the following procedure Perform zero point calibration by the following procedure 1...

Page 24: ...ipe Since the model JTD720A has separate connector ports for high and low pressure distinguish them correctly for installation work A 3 way manifold valve is optional 3 way method valve option A regul...

Page 25: ...king on center body Pipe selection Select a schedule number and nominal thickness for the connecting pipe leading from a process based on such conditions as process pressure For example use a 1 2 inch...

Page 26: ...The illustration shows a typical example of piping This transmitter is located below the differential pressure output port of the process pipe Orifice Differential pressure output port Gas vent valve...

Page 27: ...h pressure side Gas vent plug Orifice 3 way manifold valve Differential pressure output port Stop valve Gas vent valve Tee High prssure side Low prssure side Figure 2 8 Pipe for gas or liquid flow mea...

Page 28: ...ifferential pressure output port Orifice Figure 2 9 Piping for steam flow measurement For vertical piping installing the seal pots at stepped positions as shown in the figure can prevent zero drift of...

Page 29: ...e transmitters Wiring Wire and cable this transmitter as shown in the instructions Receiver Power supply 24V DC RTD Pt100 RTD S I 11 10 9 8 7 6 5 4 3 2 1 A B B P P S INSPECTION CERTIFICATE SHIELD Figu...

Page 30: ...sed and the terminal is open the device will be diagnosed with a critical failure in self diagnosis 2 It may take 5 minutes or more for stable input after connecting RTD to the transmitter 3 The maxim...

Page 31: ...ion Installation Model JTD720A Smart Multivariable Transmitter 2 13 Operating range 0 23 4 17 250 45 External load resistance Supply voltage V DC 1243 Figure 2 11 Supply voltage and load resistance ch...

Page 32: ...with the condition that the pressure resistant packing cable adapter included with this device must be used as part of the transmitter case Therefore if a cable adapter other than the included one is...

Page 33: ...is device to the top Adapter flange Figure 2 14 Changing process connection port position Procedure 1 Remove the four bolts that hold the two adapter flanges 2 Remove the two vent drain plugs 3 Attach...

Page 34: ...Installation Azbil Corporation 2 16 Model JTD720A Smart Multivariable Transmitter...

Page 35: ...mmunicator to this Device Verifying Settings such as the Required Tag Number the Output Format of this Device etc during Receiving Inspection Preparations before Measurement Starting and Stopping Meas...

Page 36: ...cator to this device Connect the communication cables to the transmitter terminals as follows Red cable Supply terminal Black cable Supply terminal Note External load resistance must be at least 250 W...

Page 37: ...s 3 2 1 Tag Number Configuration This section explains how to input or change the tag No In the menu tree in the left pane select Device Setup Basic setup Tag Double clicking Tag displays the settings...

Page 38: ...display a dialog box for selection of one of the following items Linear Sq root After selecting click the Set button After the dialog box closes click the Send button 3 2 3 Checking or setting the in...

Page 39: ...in gal min l min IGPM m 3 min cm 3 min m 3 h ImpG h cm 3 h l h gal h MilG d MilL d Ft 3 d m 3 d ImpG d BPD gal d kgal d l s l min l h l d kl s kl min kl h kl d m 3 s m 3 min m 3 h m 3 d Nm 3 s Nm 3 mi...

Page 40: ...ter 3 2 4 Checking or setting the lower and upper limits of indicator EULO and EUHI values are the upper and lower limits for engineering units scale readings displayed on the indicator They are displ...

Page 41: ...g Time Constant Configuration This section explains how to configure the damping time constant Select Device Setup Basic setup Damping The following values can be input If a value other than the follo...

Page 42: ...et at Pressure comp or Temp pressure comp it is effective It is also effective when the measured gas is set to Saturated Steam Select Device Setup Detailed setup Flow Compensation Ref PT 3 2 7 Checkin...

Page 43: ...f the measured gas is an ideal gas the formula can be changed but if it is saturated steam the formula cannot be changed Select Device Setup Detailed setup Flow Compensation Compensation Formula The f...

Page 44: ...le Transmitter 3 2 9 Checking or setting the static pressure elevation When Compensation Formula is set at Pressure comp or Temp pressure comp it is effective It is also effective when the measured ga...

Page 45: ...iping before commencing operation of this device as shown below the differential pressure outlet valves master valves drain valves gas vent plugs see Figures 2 30 and 2 31 and the stop valve of the th...

Page 46: ...essure into the pressure receiving part of the device The device will attain a state the equalized pressure state in which equal pressure will be applied to the high pressure side and low pressure sid...

Page 47: ...ualizing Valve ii Checking measured values Using the communicator check the measured values After checking disconnect the communication cable attach the device s case cover and switch the process to n...

Page 48: ...top Valve Three Way Manifold Valve Drain Plugs Low Pressure Side Stop Valve High Pressure Side Low Pressure Side Pressure Equalizing Valve 3 Close the high and low pressure side master valves see Figu...

Page 49: ...Azbil Corporation Starting and Stopping this Device Model JTD720A Smart Multivariable Transmitter 3 15...

Page 50: ...Starting and Stopping this Device Azbil Corporation 3 16 Model JTD720A Smart Multivariable Transmitter...

Page 51: ...losion proof model transmitters the pressure resistant explosion proof performance specifications are ensured by locking the case cover Fasten the case cover completely and be sure to lock it Replace...

Page 52: ...wrench When attaching the case cover first screw on the case cover tightly and then fasten the lock using the hexagonal wrench When attaching the case cover first screw on the case cover tightly and t...

Page 53: ...in unit cover be careful not to scratch the diaphragm Nut Main Unit Cover Bolt Figure 4 2 Nuts and Bolts Fastening the Main Unit Cover 2 Attachment When attaching the main unit cover fasten the bolts...

Page 54: ...surement errors 2 Cleaning the Main Unit i Procedure 1 Remove the bolts and nuts and detach the main unit cover 2 Clean the diaphragm the inside of the main unit cover etc using a soft brush and solve...

Page 55: ...on have the following devices available The required performance specifications for each device are provided for reference It is desirable for the uncertainty of the measuring device to be at least fo...

Page 56: ...ts to pressure inlet of cover flange Figure 4 3 Wiring and piping during Calibration 6 Checking the Setting Range See the operation manuals for the respective communicators Field Communication Softwar...

Page 57: ...led Select Device Setup Diag Service Calibration Correct Input First double click DP Range Values and check the values for DP LRV and the DP URV If a change is necessary change the values To calibrate...

Page 58: ...fter confirming that input pressure has stabilized click OK If the calibration succeeds Correct DP LRV succeeded or Correct DP URV succeeded will be displayed Click OK After clearing the differential...

Page 59: ...hed from automatic control to manual mode is displayed WARN Loop should be removed from automatic control After switching to manual mode click OK A warning that this operation will affect the sensor c...

Page 60: ...itched from automatic control to manual mode is displayed WARN Loop should be removed from automatic control After switching to manual mode click OK A warning that this operation will affect the senso...

Page 61: ...that the loop should be switched from automatic control to manual mode is displayed WARN Loop should be removed from automatic control After switching to manual mode click OK A warning that this opera...

Page 62: ...hat the loop should be switched from automatic control to manual mode is displayed WARN Loop should be removed from automatic control After switching to manual mode click OK A warning that this operat...

Page 63: ...ecessary and should not be done If performing this operation cannot be avoided have the following devices on hand 2 Required Equipment Precision ammeter 0 03 FS Precision resistor 250 0 005 Communicat...

Page 64: ...t in the low flow cutoff range Confirm that there are no clogs in the connecting pipes Confirm that the manifold valve stop valves etc are in the correct open and closed states Output is shifted Confi...

Page 65: ...ce and troubleshooting Model JTD720A Smart Multivariable Transmitter 4 15 4 4 2 Checking Self diagnostic Messages You can check self diagnostic messages by clicking the Status icon in the below or Dev...

Page 66: ...Fault Electronic component failure Bad electronics board Contact appropriate personnel RAM Fault Electronic component failure Bad electronics board Contact appropriate personnel ROM Fault Electronic...

Page 67: ...ut pressure exceeds two times the upper range limit of the device In such a case output is at the upper or lower limit Check PV value and decrease the differential pressure to within specifications Me...

Page 68: ...ppropriate personnel In DP Mode The device is operating in differential pressure mode Exit DP Adjustment DP Calibration screen to clear differential pressure mode In PP Mode The device is operating in...

Page 69: ...le limits Check if the calibration value is suitable for the input value Recalibrate device Status 8 3 Unknown error Contact appropriate personnel Out of PT Input process temperature Input is out of s...

Page 70: ...Azbil Corporation 4 20 Model JTD720A Smart Multivariable Transmitter...

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Page 72: ...o your use 3 Measures to be taken to secure the required level of the reliability and safety of your Equipment in your use Although azbil is constantly making efforts to improve the quality and reliab...

Page 73: ...argin of your machine or equipment you are required to renew any Azbil Corporation s products every 5 to 10 years unless otherwise specified in specifications or instruction manuals System products fi...

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Page 75: ...Document Number CM2 DST720 2001 Document Name Smart Multivariable Transmitter Model JTD720A User s Manual Date 1st edition Nov 2004 4th edition Mar 2020 Issued Edited by Azbil Corporation...

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