TI01033P/00/EN/04.14 7143971 Products Solutions Services Technical Information Deltabar FMD71, FMD7 Level measurement with electronic differential pressure Electronic differential pressure transmitter with ceramic and metal sensors Application The Deltabar FMD71/FMD7 is used to measure the level, volume or mass of liquids in pressurized and vacuum vessels. Your benefits The electronic differential pressure system eliminates traditional mechanical issues resulting in greater process availability and reliability Safety risks are minimized with the electronic differential pressure system architecture and design Lowest total cost of ownership due to reduced installation time, maintenance, downtime and spare requirements, downtime and spare requirements. Multivariable level measurement: HART-based differential pressure, head pressure and sensor temperatures from one system Continuous health indication of the entire system via HARTbased diagnostic High reproducibility and long-term stability Overload-resistant and function-monitored
Table of contents Document information... 4 Document function... 4 Symbols used... 4 Documentation... 5 Terms and abbreviations... 6 Function and system design... 7 Measuring principle - electronic differential pressure measurement... 7 Measuring system... 8 System integration... 9 Input... 10 Measured variable... 10 FMD71: measuring range of individual sensors... 10 FMD7: measuring range of individual sensors... 11 Output... 1 Output signal... 1 Signal range 4 to 0 ma HART... 1 Signal on alarm... 1 Maximum load... 1 Dead time, time constant... 13 Dynamic behavior, current output... 13 Dynamic behavior, HART... 13 Damping... 13 Alarm current... 13 Firmware Version... 13 Protocol-specific data... 14 Power supply... 15 Terminal assignment... 15 Supply voltage... 15 Cable specification for transmitter connection... 16 Cable entries... 16 Residual ripple... 16 Influence of power supply... 16 Overvoltage protection... 16 Performance characteristics - general... 17 Reference operating conditions... 17 Measuring uncertainty for small absolute pressure measuring ranges... 17 Resolution... 17 Influence of the installation position... 17 Warm-up period... 17 Vibration effects... 18 Application limits... 18 Performance characteristics - devices with ceramic process isolating diaphragm... 19 FMD71 reference accuracy... 19 Thermal change of the zero output and the output span for FMD71... 0 FMD71 total performance... 1 FMD71 long-term stability... FMD71 total error... Performance characteristics - devices with metal process isolating diaphragm... 3 FMD7 reference accuracy... 3 Thermal change of the zero output and the output span for FMD7... 3 FMD7 total performance... 4 FMD7 long-term stability... 4 FMD7 total error... 4 Installation... 5 Mounting location... 5 Orientation... 5 General installation instructions... 5 Thermal insulation - FMD71 high-temperature version... 5 Installing the sensor modules... 6 Installing the transmitter... 6 Sensor and transmitter cable... 7 Environment... 8 Ambient temperature range... 8 Storage temperature range... 8 Climate class... 8 Degree of protection... 8 Vibration resistance... 8 Electromagnetic compatibility... 8 Process... 9 FMD71 process temperature limits... 9 FMD7 process temperature limits... 9 Pressure specifications... 30 Mechanical construction... 31 Device height... 31 T14 transmitter housing (optional display on the side)... 3 In preparation - T17 transmitter housing (optional display on the side)... 3 Sensor housing... 33 FMD71 process connections, internal process isolating diaphragm... 33 FMD71 process connections, internal process isolating diaphragm... 34 FMD71 process connections, internal process isolating diaphragm... 35 FMD71 process connections, flush-mounted process isolating diaphragm... 36 FMD71 process connections, flush-mounted process isolating diaphragm... 37 FMD71 process connections, flush-mounted process isolating diaphragm... 38 FMD71 process connections, flush-mounted process isolating diaphragm... 39 FMD71 process connections, flush-mounted process isolating diaphragm... 4 FMD71 process connections, flush-mounted process isolating diaphragm... 43 FMD7 process connections, internal process isolating diaphragm... 44 Endress+Hauser
FMD7 process connections, internal process isolating diaphragm... 45 FMD7 process connections, flush-mounted process isolating diaphragm... 46 FMD7 process connections, flush-mounted process isolating diaphragm... 47 FMD7 process connections, flush-mounted process isolating diaphragm... 48 FMD7 process connections, flush-mounted process isolating diaphragm... 49 FMD7 process connections, flush-mounted process isolating diaphragm... 50 Wall and pipe mounting with mounting bracket... 53 Materials in contact with process... 54 Materials not in contact with process... 55 Operability... 58 Operating concept... 58 Local operation... 58 Operating languages... 60 Certificates and approvals... 61 CE mark... 61 Ex approvals... 61 Suitability for hygienic processes (in preparation)... 61 Pressure Equipment Directive (PED)... 61 Other standards and guidelines... 61 CRN approval... 61 Classification of process sealing between electrical systems and (flammable or combustible) process fluids in accordance with ANSI/ISA 1.7.01... 6 Calibration unit... 6 Calibration... 6 Test, certificate... 6 Ordering information... 63 Documentation... 63 Field of Activities... 63 Technical Information... 63 Operating Instructions... 63 Description of device parameters... 63 Brief Operating Instructions... 63 Safety Instructions (XA)... 63 Registered trademarks... 64 HARTâ... 64 Endress+Hauser 3
Document information Document function Symbols used The document contains all the technical data on the device and provides an overview of the accessories and other products that can be ordered for the device. Safety symbols Symbol DANGER A0011189-EN WARNING A0011190-EN CAUTION NOTICE A0011191-EN A001119-EN Meaning DANGER! This symbol alerts you to a dangerous situation. Failure to avoid this situation will result in serious or fatal injury. WARNING! This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in serious or fatal injury. CAUTION! This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in minor or medium injury. NOTICE! This symbol contains information on procedures and other facts which do not result in personal injury. Electrical symbols Symbol A0011197 A0011198 A0017381 A001100 A0011199 A001101 Meaning Direct current A terminal to which DC voltage is applied or through which direct current flows. Alternating current A terminal to which alternating voltage is applied or through which alternating current flows. Direct current and alternating current A terminal to which alternating voltage or DC voltage is applied. A terminal through which alternating current or direct current flows. Ground connection A grounded terminal which, as far as the operator is concerned, is grounded via a grounding system. Protective ground connection A terminal which must be connected to ground prior to establishing any other connections. Equipotential connection A connection that has to be connected to the plant grounding system: This may be a potential equalization line or a star grounding system depending on national or company codes of practice. Symbols for certain types of information Symbol A001118 A0011183 A0011184 A0011193 Meaning Permitted Indicates procedures, processes or actions that are permitted. Preferred Indicates procedures, processes or actions that are preferred. Forbidden Indicates procedures, processes or actions that are forbidden. Tip Indicates additional information. 4 Endress+Hauser
Symbol A0011194 A0011195 A0011196 Meaning Reference to documentation Refers to the corresponding device documentation. Reference to page Refers to the corresponding page number. Reference to graphic Refers to the corresponding graphic number and page number. Visual inspection A001550 Symbols in graphics Symbol Meaning 1,, 3... Item numbers,, Series of steps A, B, C,... Views A-A, B-B, C-C,... -. A0011187 A0011188 Sections Hazardous area Indicates a hazardous area. Safe area (non-hazardous area) Indicates the non-hazardous area. Documentation The document types listed are available: On the CD supplied with the device In the Download Area of the Endress+Hauser Internet site: www.endress.com Download Brief Operating Instructions KA01105P: getting the 1st measured value quickly The Brief Operating Instructions contain all the essential information from incoming acceptance to initial commissioning. Operating Instructions BA01044P: your comprehensive reference These Operating Instructions contain all the information that is required in various phases of the life cycle of the device: from product identification, incoming acceptance and storage, to mounting, connection, operation and commissioning through to troubleshooting, maintenance and disposal. Description of Device Parameters GP01013P: reference for your parameters The document provides a detailed explanation of each individual parameter in the operating menu. The description is aimed at those who work with the device over the entire life cycle and perform specific configurations. Safety Instructions (XA) Safety Instructions (XA) are supplied with the device depending on the approval. These instructions are an integral part of the Operating Instructions. Device Certificate/type of protection Documentation Version 1) FMD71, FMD7 ATEX II 1/G Ex ia IIC T6 Ga/Gb XA00619P BA FMD71, FMD7 ATEX II 1/G Ex d [ia] IIC T6 Ga/Gb XA0060P BC FMD71, FMD7 ATEX II 3G Ex na IIC T6 GC XA0061P BD FMD71, FMD7 IEC Ex ia IIC T6 Ga/Gb XA006P IA FMD71, FMD7 IEC Ex d [ia] IIC T6 Ga/Gb XA0063P IB FMD71, FMD7 CSA General Purpose - CD Endress+Hauser 5
Device Certificate/type of protection Documentation Version 1) FMD71 FM C/US IS Cl.I Div.1 Gr.A-D, AEx ia, Zone 0,1, XA0068P FA FMD71 FM C/US XP AIS Cl.I Div.1 Gr.A-D, Exd [ia] Zone 0,1, XA0069P FB FMD71 CSA C/US XP Cl.I Div.1 Gr.A-D, Ex d [ia], Zone 0,1, XA00631P CB FMD71 FM C/US NI Cl.I Div. Gr.A-D, Zone XA00668P FD FMD71 CSA C/US NI, Cl.I Div., Gr.A-D Cl.I, Zone, IIC XA00670P CC FMD71 CSA C/US IS Cl.I Div.1 Gr.A-D, Ex ia Zone 0,1, XA00630P CA FMD7 CSA C/US IS Cl.I Div.1 Gr.A-D, Ex ia Zone 0,1, XA0066P CA FMD7 CSA C/US XP Cl.I Div.1 Gr.A-D, Ex d [ia], Zone 0,1, XA0067P CB FMD7 CSA C/US NI, Cl.I Div. Gr.A-D, Zone XA00671P CC FMD7 FM C/US IS Cl.I Div.1 Gr.A-D, AEx ia, Zone 0,1, XA0064P FA FMD7 FM C/US XP AIS Cl.I Div.1 Gr.A-D, Exd [ia] Zone 0,1, XA0065P FB FMD7 FM C/US NI Cl.I Div. Gr.A-D, Zone XA00669P FD 1) Product Configurator, "Approval" section The nameplate provides information on the Safety Instructions (XA) that are relevant for the device. Terms and abbreviations Term/abbreviation MWP OPL LRL URL LRV URV Explanation The MWP (maximum working pressure) for the individual sensors depends on the lowest-rated element, with regard to pressure, of the selected components, i.e. the process connection has to be taken into consideration in addition to the measuring cell. Also observe pressure-temperature dependency. For the relevant standards and additional notes, see the "( 30)" section. The OPL (over pressure limit = sensor overload limit) for the measuring device depends on the lowest-rated element, with regard to pressure, of the selected components, i.e. the process connection has to be taken into consideration in addition to the measuring cell. Also observe pressure-temperature dependency. For the relevant standards and additional notes, see the "( 30)" section. Lower range limit Upper range limit Lower range value Upper range value TD ½Lower range value (LRV) ½ < ½ Upper range value (URV)½ Example with measuring cell HP = 1 000 mbar (15 psi) and measuring cell LP = 400 mbar (6 psi): LRL = 400 mbar (6 psi): Lower range value (LRV) = 300 mbar ( 4.35 psi) Upper range value (URV) = 0 mbar Nominal value (URL) =1 000 mbar (15 psi) Turn down: TD = URL + ½LRL½/½ URV - LRV ½ 4.66:1 Set span: URV LRV =300 mbar (4.35 psi) This span is based on the zero point. Turn down Set span and zero-based span LRL LRV 1 = URV 5 URL 1 Set span Zero-based span 3 Nominal value Upper range limit (URL) 4 Nominal measuring range 5 Sensor measuring range 4 3 A0016451 6 Endress+Hauser
Function and system design Measuring principle - electronic differential pressure measurement FMD71 with ceramic process isolating diaphragm (Ceraphire ) The ceramic sensor is a dry sensor, i.e. the process pressure acts directly on the robust ceramic process isolating diaphragm and causes it to deflect. A pressure-dependent change in capacitance is measured at the electrodes of the ceramic support and the process isolating diaphragm. The measuring range is determined by the thickness of the ceramic process isolating diaphragm. Advantages: Guaranteed overload resistance up to 40 times the nominal pressure The ultrapure 99.9 % ceramic (Ceraphire, see also "www.endress.com/ceraphire") ensures: Excellent chemical resistance properties, comparable with Alloy C Less relaxation High mechanical stability Can be used in absolute vacuum Outstanding surface finish, R a 0.3 µm (11.8 µin) 1 3 4 p A000465 1 Air pressure (relative pressure sensors) Ceramic support 3 Electrodes 4 Ceramic process isolating diaphragm FMD7 with metal process isolating diaphragm The process pressure deflects the metal process isolating diaphragm of the individual sensors and a fill fluid transfers the pressure to a resistance bridge (semiconductor technology) within the compact sensor. The pressure-dependent change in the bridge output voltage is measured and evaluated. Advantages: Can be used for process pressures up to 40 bar (600 psi). High long-term stability Guaranteed overload resistance up to 10 times the nominal pressure Significantly less thermal effect compared to diaphragm seal systems with capillaries 1 3 4 p 1 Silicon measuring element, substrate Wheatstone bridge 3 Channel with fill fluid 4 Metal process isolating diaphragm A0016448 Endress+Hauser 7
Measuring system The FMD71/FMD7 consists of sensor modules and one transmitter. One sensor module measures the hydrostatic pressure (high pressure) and the other one the head pressure (low pressure). The level (electronic differential pressure) is calculated in the transmitter using these two digital values. Device features FMD71 FMD7 Field of application Process connections Measuring ranges (differential pressure) Level Differential pressure Thread EN and ANSI flanges Flush-mounted hygienic connections from 100 to +100 mbar ( 1.5 to +1.5 psi) to 1 to +40 bar ( 15 to +600 psi) Thread EN and ANSI flanges Flush-mounted hygienic connections from 400 to +400 mbar ( 6 to +6 psi) to 1 to +40 bar ( 15 to +600 psi) MWP 1) to60 bar (900 psi) to160 bar ( 400 psi) Process temperature limits Ambient temperature range Reference accuracy of the individual sensors Supply voltage Output Options 5 to +150 C ( 13 to +30 F) 40 to +15 C ( 40 to +57 F) Higher process temperature limits available on request (up to +50 C (480 F)) 40 to +80 C ( 40 to +176 F) Up to ±0.075 % of the set span PLATINUM version: up to ±0.05 % of the set span Version for non-hazardous areas: 1 (13) to 45 V DC Ex ia: 1 (13) to 30 V DC 4 to 0 ma with superimposed HART protocol NACE-compliant materials Software pre-configurations 1) MWP: depends on the lowest-rated element, with regard to pressure, of the selected component Product design Level measurement (level, volume and mass) with Deltabar: 8 Endress+Hauser
1 3 A0016449 1 Sensor module LP Sensor module HP 3 Transmitter The FMD71/FMD7 is best suited to level measurement in tanks with pressure overlay or vacuum vessels and tanks, high distillation columns and other vessels with changing ambient temperatures. The sensor module HP is mounted on the lower measuring connection and the sensor module LP is mounted above the maximum level. The transmitter can be mounted on pipes or walls with the mounting bracket. The sensor signal is transmitted digitally. In addition, sensor temperatures and the individual process pressures present at the respective sensor modules can be individually evaluated and transmitted. System integration The device can be given a tag name (max. 3 alphanumeric characters). Designation Version 1) Measuring point (TAG), see additional specifications Z1 1) Product Configurator, "Identification" section Endress+Hauser 9
Input Measured variable Measured process variables Pressure HP and Pressure LP Sensor temperature Calculated process variables Differential pressure Level (level, volume or mass) FMD71: measuring range of individual sensors The URL of the differential pressure corresponds to the nominal value of the HP sensor. Relative pressure Nominal value Range limit MWP OPL Vacuum resistance 1) Version ) lower (LRL) upper (URL) [bar (psi)] [bar (psi)] [bar (psi)] [bar (psi)] [bar abs (psi abs )] 100 mbar (1.5 psi) 0.1 ( 1.5) +0.1 (+1.5).7 (40.5) 4 (60) 0.7 (10.5) 1C 50 mbar (4 psi) 0.5 ( 4) +0.5 (+4) 3.3 (49.5) 5 (75) 0.5 (7.5) 1E 400 mbar (6 psi) 0.4 ( 6) +0.4 (+6) 5.3 (79.5) 8 (10) 0 1F 1 bar (15 psi) 1 ( 15) +1 (+15) 6.7 (100.5) 10 (150) 1H bar (30 psi) 1 ( 15) + (+30) 1 (180) 18 (70) 1K 4 bar (60 psi) 1 ( 15) +4 (+60) 16.7 (50.5) 5 (375) 1M 10 bar (150 psi) 1 ( 15) +10 (+150) 6.7 (400.5) 40 (600) 1P 40 bar (600 psi) 1 ( 15) +40 (+600) 40 (600) 60 (900) 1S 1) The vacuum resistance applies for the measuring cell under reference operating conditions. (see "Reference operating conditions" section) ) Product Configurator, "Sensor range" section Absolute pressure Nominal value Range limit MWP OPL Vacuum resistance 1) Version ) lower (LRL) upper (URL) [bar abs (psi abs )] [bar abs (psi abs )] [bar abs (psi abs )] [bar abs (psi abs )] [bar abs (psi abs )] 100 mbar (1.5 psi) 0 +0.1 (+1.5).7 (40.5) 4 (60) 0 C 50 mbar (4 psi) 0 +0.5 (+4) 3.3 (49.5) 5 (75) E 400 mbar (6 psi) 0 +0.4 (+6) 5.3 (79.5) 8 (10) F 1 bar (15 psi) 0 +1 (+15) 6.7 (100.5) 10 (150) H bar (30 psi) 0 + (+30) 1 (180) 18 (70) K 4 bar (60 psi) 0 +4 (+60) 16.7 (50.5) 5 (375) M 10 bar (150 psi) 0 +10 (+150) 6.7 (400.5) 40 (600) P 40 bar (600 psi) 0 +40 (+600) 40 (600) 60 (900) S 1) The vacuum resistance applies for the measuring cell under reference operating conditions. (see "Reference operating conditions" section) ) Product Configurator, "Sensor range" section 10 Endress+Hauser
FMD7: measuring range of individual sensors The URL of the differential pressure corresponds to the nominal value of the HP sensor. Relative pressure Nominal value Range limit MWP OPL Vacuum resistance 1) Version ) lower (LRL) upper (URL) Silicone oil [bar (psi)] [bar (psi)] [bar (psi)] [bar (psi)] [bar abs (psi abs )] 400 mbar (6 psi) 0.4 ( 6) +0.4 (+6) 4 (60) 6 (90) 0.01 (0.15) 1F 1 bar (15 psi) 1 ( 15) +1 (+15) 6.7 (100) 10 (150) 1H bar (30 psi) 1 ( 15) + (+30) 13.3 (00) 0 (300) 1K 4 bar (60 psi) 1 ( 15) +4 (+60) 18.7 (80.5) 8 (40) 1M 10 bar (150 psi) 1 ( 15) +10 (+150) 6.7 (400.5) 40 (600) 1P 40 bar (600 psi) 1 ( 15) +40 (+600) 100 (1500) 160 (400) 1S 1) The vacuum resistance applies for the measuring cell under reference operating conditions. (see "Reference operating conditions" section) ) Product Configurator, "Sensor range" section Absolute pressure Nominal value Range limit MWP OPL Vacuum resistance 1) Version ) lower (LRL) upper (URL) Silicone oil [bar abs (psi abs )] [bar abs (psi abs )] [bar abs (psi abs )] [bar abs (psi abs )] [bar abs (psi abs )] 1 bar (15 psi) 0 +1 (+15) 6.7 (100) 10 (150) 0.01 (0.15) H bar (30 psi) 0 + (+30) 13.3 (00) 0 (300) K 4 bar (60 psi) 0 +4 (+60) 18.7 (80.5) 8 (40) M 10 bar (150 psi) 0 +10 (+150) 6.7 (400.5) 40 (600) P 40 bar (600 psi) 1 ( 15) +40 (+600) 100 (1500) 160 (400) S 1) The vacuum resistance applies for the measuring cell under reference operating conditions. (see "Reference operating conditions" section) ) Product Configurator, "Sensor range" section Endress+Hauser 11
on off Display Sensor Deltabar FMD71, FMD7 Output Output signal 4 to 0 ma with superimposed digital communication protocol HART 6.0, -wire Operation External (A) 1) + LCD (C) Internal (B) + LCD (C) Internal (B) A B C damp. SW /min R HART FIELD COMMUNICATION PROTOCOL + E A00180 Order code version ) 5 4 8 1) In the case of the T17 transmitter housing, the operating keys are always arranged internally on the electronic insert. ) Product Configurator, "Display, operation:" section Signal range 4 to 0 ma HART Signal on alarm Maximum load 3.8 ma to 0.5 ma According to NAMUR NE43 Max. alarm: (factory setting: ma) can be set from 1 to 3 ma Hold measured value: last measured value is held Min. alarm: 3.6 ma In order to guarantee sufficient terminal voltage in two-wire devices, a maximum load resistance R (including line resistance) must not be exceeded depending on the supply voltage U 0 of the supply unit. In the following load diagrams, observe the position of the jumper and the explosion protection: Test RLmax A RLmax [ ] [ ] 1435 1391 117 1174 B Test 783 348 739 304 1 0 30 40 45 U 13 0 30 40 45 U [V] [V] 1 1 3 R U 1 V U 13 V Lmax 3 R 3 ma Lmax 3 ma A Jumper for 4 to 0 ma test signal set to "Non-test" position B Jumper for 4 to 0 ma test signal set to "Test" position 1 Power supply for II 1/ G Ex ia, FM IS, CSA IS Power supply for devices for the non-hazardous area, G Ex d, 3 G Ex na, FM XP, FM NI, CSA XP, CSA dust ignition-proof 3 R Lmax maximum load resistance U Supply voltage A0017533 1 Endress+Hauser
Dead time, time constant Presentation of the dead time and the time constant: I 100 % 90 % 63 % t 1 t t 3 t A0019786 Dynamic behavior, current output Dead time (t 1 ) [ms] Time constant (T63), t Time constant (T90), t 3 max. 10 10 80 Dynamic behavior, HART Dead time (t 1 ) [ms] Dead time (t 1 ) [ms] + Time constant T63 (= t ) [ms] Dead time (t 1 ) [ms] + Time constant T90 (= t 3 ) [ms] min. 80 400 560 max. 1100 10 1380 Reading cycle Acyclic: max. 3/s, typically 1/s (depending on command # and number of preambles) Cyclic (burst): max. 3/s, typically /s The Deltabar FMD71/FMD7 offers BURST MODE functionality for cyclical value transmission via the HART communication protocol. Cycle time (update time) Cyclic (burst): min. 300 ms. Response time Acyclic: min. 330 ms, typically 590 ms (depending on command # and number of preambles) Cyclic (burst): min. 160 ms, typically 350 ms (depending on command # and number of preambles) Damping A damping affects all outputs (output signal, display): Via onsite display, handheld terminal or PC with operating program, continuous from 0 to 999 s Via DIP switch on the electronic insert, switch position "on" = set value and "off" Factory setting: s Damping can be switched on or off using a switch on the electronic insert. If the switch is on, the time constant can be set via a parameter in the menu and if the switch is off, the output signal is not damped (time constant = 0.0). Alarm current Designation Version 1) Configured min alarm current IA 1) Product Configurator, "Service" section Firmware Version Designation Version 1) 01.00.zz, HART, DevRev01 78 1) Product Configurator, "Firmware Version" section Endress+Hauser 13
Protocol-specific data Manufacturer ID 17 (0x11) Device type ID 39 (0x7) HART specification 6.0 Device description files (DTM, DD) HART device variables Supported functions Information and files under: www.endress.com www.hartcomm.org Measured values for PV (primary variable) Differential pressure Level linear (before lin.) Level after linearization table Measured values for SV, TV, QV (second, third and fourth variable) Measured differential pressure Corrected pressure Measured pressure HP Sensor press. HP Sensor temperature HP Measured pressure LP Sensor press. LP Sensor temperature LP Level before linearization Tank content Electronic temperature Burst mode Additional transmitter status 14 Endress+Hauser
Power supply NOTICE Limitation of electrical safety due to incorrect connection! In accordance with IEC/EN61010 a separate circuit breaker must be provided for the device. When using the measuring device in hazardous areas, installation must comply with the corresponding national standards and regulations and the Safety Instructions or Installation or Control Drawings. All explosion protection data are given in separate documentation which is available upon request. The Ex documentation is supplied as standard with all devices approved for use in explosion hazardous areas. Devices with integrated overvoltage protection must be grounded. Protective circuits against reverse polarity, HF influences and overvoltage peaks are integrated. Terminal assignment 1 Test 3 8 4... 0mA Test Test 7 6 5 4... 0mA Test 4 A0019989 1 Housing Supply voltage (see the following section on "Supply voltage") 3 4 to 0 ma 4 Devices with integrated overvoltage protection are labeled "OVP" (overvoltage protection) here. 5 External ground terminal 6 4 to 0 ma test signal between positive and test terminal 7 Internal ground terminal 8 Jumper for 4 to 0 ma test signal Supply voltage Electronic version Jumper for 4 to 0 ma test signal in "Test" position (delivery status) Jumper for 4 to 0 ma test signal in "Non-test" position 4 to 0 ma HART, version for non-hazardous areas 13 to 45 V DC 1 to 45 V DC Measuring a 4 to 0 ma test signal A 4 to 0 ma test signal may be measured via the positive and test terminal without interrupting the measurement. The minimum supply voltage of the device can be reduced by simply changing the position of the jumper. As a result, operation is also possible with a lower supply voltage. To keep the corresponding measured error below 0.1 %, the current measuring device should exhibit an internal resistance of <0.7Ω. Observe the position of the jumper in accordance with the following table. Endress+Hauser 15
Jumper position for test signal Test Description Measurement of 4 to 0 ma test signal via the positive and test terminal: possible. (Thus, the output current can be measured without interruption via the diode.) Delivery status Minimum supply voltage: 13 V DC A001999 Test Measurement of 4 to 0 ma test signal via positive and test terminal: not possible. Minimum supply voltage: 1 V DC A0019993 Cable specification for transmitter connection Endress+Hauser recommends using twisted, shielded two-wire cables. Terminals for core cross-sections0.5 to.5 mm (0 to 14 AWG) The cable outer diameter depends on the cable entry used. Cable entries Explosion protection Type Permitted cable diameter Permitted wire cross-sections Standard Ex ia Plastic M0x1.5 5 to 10 mm (0. to 0.39 in) 0.5 to.5 mm (0 to 14 AWG) Ex na FM approval CSA approval Metal M0 x 1.5 7 to 10.5 mm (0.8 to 0.41 in) Residual ripple Influence of power supply Overvoltage protection Without influence on 4 to 0 ma signal up to ±5 % residual ripple within the permitted voltage range [according to HART hardware specification HCF_SPEC-54 (DIN IEC 60381-1)] 0.0006 % of URL/1 V Standard version The standard version of the pressure instruments does not contain any special elements to protect against overvoltage ("wire to ground"). Nevertheless the requirements of the applicable EMC standard EN 61000-4-5 (testing voltage 1kV EMC wire/ground) are met. Optional overvoltage protection Devices showing version "NA" in feature 610 "Accessory Mounted" in the order code are equipped with overvoltage protection. Overvoltage protection: Nominal functioning DC voltage: 600 V Nominal discharge current: 10 ka Surge current check î = 0 ka satisfied as per DIN EN 60079-14: 8/0 μs Arrester AC current check I = 10 A satisfied NOTICE Device could be destroyed! Devices with integrated overvoltage protection must be grounded. 16 Endress+Hauser
Performance characteristics - general Reference operating conditions Measuring uncertainty for small absolute pressure measuring ranges Resolution Influence of the installation position As per IEC 60770 Ambient temperature T A = constant, in the range of:+1 to +33 C (+70 to +91 F) Humidityj= constant, in the range of: 5 to 80 % rh Ambient pressure p A = constant, in the range of:860 to 1 060 mbar (1.47 to 15.37 psi) Position of the measuring cell = constant, in range: horizontal ±1 (see also "Influence of the installation position" section ( 17)) Input of Lo Trim Sensor and Hi Trim Sensor for lower range value and upper range value Zero based span Material of process isolating diaphragm FMD71: Al O 3 (aluminum oxide ceramic, Ceraphire ) Material of process isolating diaphragm FMD7: AISI 316L (1.4435) Filling oil: silicone oil Supply voltage: 4 V DC ±3 V DC Load with HART: 50 Ω The smallest extended uncertainty of measurement that can delivered by our standards is: in range 1 to 30 mbar (0.0145 to 0.435 psi): 0.4 % of reading in range < 1 mbar (0.0145 psi): 1 % of reading. Current output: 1 μa Display: can be set (factory setting: presentation of the maximum accuracy of the transmitter) C 90 A 90 B A0016465 Process isolating diaphragm axis is horizontal (A) Process isolating diaphragm pointing upwards (B) Process isolating diaphragm pointing downwards (C) FMD71 FMD7 sensor with 1/" thread and silicone oil Calibration position, no measurement error < +0. mbar (+0.003 psi) < 0. mbar ( 0.003 psi) < +4 mbar (+0.06 psi) < 4 mbar ( 0.06 psi) FMD7 sensor with thread > 1/" and flanges < +10 mbar (+0.145 psi) The value is doubled for inert oil. < 10 mbar ( 0.145 psi) The value is doubled for inert oil. If the sensors are mounted at 180 to one another, this doubles the effect of the deviation which influences the differential pressure or the level signal. This effect can be corrected using the function to adjust the position (position adjustment) for the differential pressure. Additional position adjustments for individual pressure signals are not available. A position-dependent zero shift can be corrected on the device. Warm-up period 4 to 0 ma HART : < 10 s Endress+Hauser 17
Vibration effects Test standard Vibration effects IEC 6198-3 Reference accuracy up to 10 to 60 Hz: ±0.35 mm (±0.01 in); 60 to 500 Hz: g Application limits A high ratio between the level and head pressure can result in large measured errors. A maximum ratio of 1:10 is recommended. For calculation purposes, please use the free "Applicator" calculation tool, which is available online at "www.endress.com/applicator" or on CD-ROM. 18 Endress+Hauser
Performance characteristics - devices with ceramic process isolating diaphragm FMD71 reference accuracy The reference accuracy contains the non-linearity [DIN EN 6198-3.11] including the pressure hysteresis [DIN EN 6198-3.13] and non-repeatability [DIN EN 6198-3.11] in accordance with the limit point method as per [DIN EN 60770]. The specifications refer to the calibrated span. Measuring cell Sensor Reference accuracy (A) [%URL for every sensor] Calculated reference accuracy (A Diff ) of the differential pressure Standard Platinum 100 mbar (1.5 psi) Relative pressure A = ±0.075 - Calculation (mbar, bar or psi): 50 mbar (3.75 psi) Relative pressure A = ±0.075-400 mbar (6 psi) Relative pressure A = ±0.075-1 bar (15 psi) bar (30 psi) 4 bar (60 psi) 10 bar (150 psi) 40 bar (600 psi) Relative pressure/ Absolute pressure A = ±0.075 A = ±0.05 = (A. URL ) + (A. LP URL LP) 100 100 A Diff HP HP Percentage calculation of URL dp:. 100 A Diff [%] = A Diff P Diff A0016468 A0016469 Ordering information Designation Version 1) Platinum Standard D G 1) Product Configurator, "Reference accuracy" section Endress+Hauser 19
Thermal change of the zero output and the output span for FMD71 Standard version Measuring cell 10 to +60 C (+14 to +140 F) 0 to 10 C ( 4 to +14 F) +60 to +15 C (+140 to +57 F) Calculated thermal change (T Diff ) of the differential pressure % of the set span for every sensor 100 mbar (1.5 psi) 50 mbar (4 psi) 400 mbar (6 psi) 1 bar (15 psi) bar (30 psi) 4 bar (60 psi) 10 bar (150 psi) 40 bar (600 psi) T total = ±0.176 T total = ±0.76 Calculation (mbar, bar or psi): T total = ±0.09 T total = ±0.50 = (T. URL ) + (T. LP URL LP) 100 100 T Diff HP HP Percentage calculation of URL dp:. 100 T Diff[%] = T Diff P Diff A0016474 A0016475 High-temperature version Measuring cell Sensor 10 to +60 C (+14 to +140 F) +60 to +150 C (140 to +30 F) Calculated thermal change (T Diff ) of the differential pressure 100 mbar (1.5 psi) 50 mbar (4 psi) 400 mbar (6 psi) 1 bar (15 psi) bar (30 psi) 4 bar (60 psi) 10 bar (150 psi) 40 bar (600 psi) 1 bar (15 psi) bar (30 psi) 4 bar (60 psi) 10 bar (150 psi) Relative pressure Relative pressure Absolute pressure % of the set span for every sensor T total = ±0.176 T = ±0.75 Calculation (mbar, bar or psi): T total = ±0.09 T = ±0.5 T total = ±0.09 T = ±0.75 = (T. URL ) + (T. LP URL LP) 100 100 T Diff HP HP Percentage calculation of URL dp:. 100 T Diff[%] = T Diff P Diff A0016474 A0016475 40 bar (600 psi) Absolute pressure T total = ±0.09 T = ±0.5 0 Endress+Hauser
Hygienic version Measuring cell Sensor 10 to +60 C (+14 to +140 F) 0 to +150 C (0 to +30 F) Calculated thermal change (T Diff ) of the differential pressure 100 mbar (1.5 psi) 50 mbar (4 psi) 400 mbar (6 psi) 1 bar (15 psi) bar (30 psi) 4 bar (60 psi) 10 bar (150 psi) 40 bar (600 psi) 1 bar (15 psi) bar (30 psi) 4 bar (60 psi) 10 bar (150 psi) Relative pressure Relative pressure Absolute pressure % of the set span for every sensor T total = ±0.35 T = ±1.5 Calculation (mbar, bar or psi): T total = ±0.184 T = ±0.75 T total = ±0.184 T = ±1.5 = (T. URL ) + (T. LP URL LP) 100 100 T Diff HP HP Percentage calculation of URL dp:. 100 T Diff[%] = T Diff P Diff A0016474 A0016475 40 bar (600 psi) Absolute pressure T total = ±0.184 T = ±0.75 FMD71 total performance The "Total performance" specification comprises the non-linearity including hysteresis, nonreproducibility as well as the thermal change of the zero point. All specifications apply to the temperature range 10 to +60 C (+14 to +140 F). Measuring cell % of URL for every sensor - standard version % of URL for every sensor - hightemperature version % of URL for every sensor - hygienic version Calculated total performance (TP Diff ) of the differential pressure 100 mbar (1.5 psi) 50 mbar (4 psi) 400 mbar (6 psi) 1 bar (15 psi) bar (30 psi) 4 bar (60 psi) 10 bar (150 psi) 40 bar (600 psi) TP = ±0. TP = ±0.46 TP = ±0.575 Calculation (mbar, bar or psi): TP = ±0.15 TP = ±0.46 TP = ±0.5 = (TP. URL ) + (TP. LP URL LP) 100 100 TP Diff HP HP Percentage calculation of URL dp:. 100 TP Diff [%] = TP Diff P Diff A0016470 A0016471 The "Applicator Sizing Electronic dp" selection tool, available free of charge on the Endress +Hauser web site (www.endress. com/applicator), enables detailed calculations for your respective applications. Endress+Hauser 1
FMD71 long-term stability ' Measuring ranges Sensor Standard version Hygienic version Calculated long-term stability (L Diff ) of the differential pressure 1 year 10 years 1 year 10 years % of URL for every sensor % of URL for every sensor 100 mbar (1.5 psi) 50 mbar (4 psi) 400 mbar (6 psi) 1 bar (15 psi) bar (30 psi) 4 bar (60 psi) 10 bar (150 psi) 40 bar (600 psi) Relative pressure Absolute pressure Relative pressure Absolute pressure L = ±0.1 L = ±0. L = ±0.5 L = ±0.45 Calculation (mbar, bar or psi): L = ±0.3 L = ±0.55 L = ±0.05 L = ±0. L = ±0.1 L = ±0. L = ±0.3 L = ±0.3 = (L. URL ) + (L. LP URL LP) 100 100 L Diff HP HP Percentage calculation of URL dp/year:. 100 L Diff [%] = L Diff P Diff A0016463 A0016464 FMD71 total error The total error comprises the total performance and long-term stability. All specifications apply to the temperature range 10 to +60 C (+14 to +140 F). Measuring cell % of URL for every sensor - standard version % of URL for every sensor - hightemperature version % of URL for every sensor - hygienic version Calculated total error (TE Diff ) of the differential pressure 100 mbar (1.5 psi) 50 mbar (4 psi) 400 mbar (6 psi) 1 bar (15 psi) bar (30 psi) 4 bar (60 psi) 10 bar (150 psi) 40 bar (600 psi) TE = ±0.5 TE = ±0.51 TE = ±0.95 Calculation (mbar, bar or psi): TE = ±0. TE = ±0.51 TE = ±0.7 = (TE. URL ) + (TE. LP URL LP) 100 100 TE Diff HP HP Percentage calculation of URL dp:. 100 TE Diff[%] = TE Diff P Diff A001647 A0016473 Endress+Hauser
Performance characteristics - devices with metal process isolating diaphragm FMD7 reference accuracy The reference accuracy contains the non-linearity [DIN EN 6198-3.11] including the pressure hysteresis [DIN EN 6198-3.13] and non-repeatability [DIN EN 6198-3.11] in accordance with the limit point method as per [DIN EN 60770]. The specifications refer to the calibrated span. Measuring cell Sensor Reference accuracy (A) [%URL for every sensor] Calculated reference accuracy (A Diff ) of the differential pressure Standard Platinum 400 mbar (6 psi) Absolute pressure A = ±0.15 - Calculation (mbar, bar or psi): 1 bar (15 psi) bar (30 psi) 4 bar (60 psi) 10 bar (150 psi) 40 bar (600 psi) Relative pressure/ Absolute pressure A = ±0.075 A = ±0.05 = (A. URL ) + (A. LP URL LP) 100 100 A Diff HP HP A0016468 Percentage calculation of URL dp:. 100 A Diff [%] = A Diff P Diff A0016469 Ordering information Designation Version 1) Platinum Standard D G 1) Product Configurator, "Reference accuracy" section Thermal change of the zero output and the output span for FMD7 ' ' Measuring cell 10 to +60 C (+14 to +140 F) 40 to 10 C ( 40 to +14 F) +60 to +80 C (+140 to +176 F) Calculated thermal change (T Diff ) of the differential pressure % of the set span for every sensor 400 mbar (6 psi) T total = ±0.15 T span = ±0. T zero point = ±0.015 1 bar (15 psi) bar (30 psi) 4 bar (60 psi) 10 bar (150 psi) 40 bar (600 psi) T total = ±0.101 T span = ±0.1 T zero point = ±0.01 T total = ±0.43 T span = ±0.4 T zero point = ±0.03 T total = ±0.4 T span = ±0.4 T zero point = ±0.0 Calculation (mbar, bar or psi): = (T. URL ) + (T. LP URL LP) 100 100 T Diff HP HP Percentage calculation of URL dp:. 100 T Diff[%] = T Diff P Diff A0016474 A0016475 Endress+Hauser 3
FMD7 total performance The "Total performance" specification comprises the non-linearity including hysteresis, nonreproducibility as well as the thermal change of the zero point. All specifications apply to the temperature range 10 to +60 C (+14 to +140 F). Measuring cell % of URL for every sensor Calculated total performance (TP Diff ) of the differential pressure 400 mbar (6 psi) TP = ±0.5 Calculation (mbar, bar or psi): 1 bar (15 psi) bar (30 psi) 4 bar (60 psi) 10 bar (150 psi) 40 bar (600 psi) TP = ±0.15 = (TP. URL ) + (TP. LP URL LP) 100 100 TP Diff HP HP Percentage calculation of URL dp:. 100 TP Diff [%] = TP Diff P Diff A0016470 A0016471 The "Applicator Sizing Electronic dp" selection tool, available free of charge on the Endress +Hauser web site (www.endress. com/applicator), enables detailed calculations for your respective applications. FMD7 long-term stability ' Measuring ranges 1 year 5 years 10 years Calculated long-term stability (L Diff ) of the differential pressure % of URL for every sensor 400 mbar (6 psi) L = ±0.035 L = ±0.14 L = ±0.3 Calculation (mbar, bar or psi): 1 bar (15 psi) L = ±0.00 L = ±0.08 L = ±0.180 bar (30 psi) 4 bar (60 psi) 10 bar (150 psi) L = ±0.05 L = ±0.05 L = ±0.075 40 bar (600 psi) L = ±0.05 L = ±0.075 L = ±0.100 = (L. URL ) + (L. LP URL LP) 100 100 L Diff HP HP Percentage calculation of URL dp/year:. 100 L Diff [%] = L Diff P Diff A0016463 A0016464 FMD7 total error The total error comprises the total performance and long-term stability. All specifications apply to the temperature range 10 to +60 C (+14 to +140 F). Measuring cell % of URL/year for every sensor Calculated total error (TE Diff ) of the differential pressure 400 mbar (6 psi) TE = ±0.30 Calculation (mbar, bar or psi): 1 bar (15 psi) bar (30 psi) 4 bar (60 psi) 10 bar (150 psi) 40 bar (600 psi) TE = ±0.0 = (TE. URL ) + (TE. LP URL LP) 100 100 TE Diff HP HP Percentage calculation of URL dp:. 100 TE Diff[%] = TE Diff P Diff A001647 A0016473 4 Endress+Hauser
Installation When measuring in media containing solids, such as dirty liquids, installing separators and drain valves is useful for capturing and removing sediment. Mounting location Orientation General installation instructions Thermal insulation - FMD71 high-temperature version The FMD71/FMD7 is best suited to level measurement in vessels with pressure overlay or vacuum tanks, high distillation columns and other vessels with changing ambient temperatures. The sensor module HP is mounted on the lower measuring connection and the sensor module LP is mounted above the maximum level. The transmitter can be mounted on pipes or walls with the mounting bracket. Transmitter: Any orientation. Sensor modules: The orientation can cause a zero point shift ( 17). This position-dependent zero point shift can be corrected directly at the device via the operating key, and also in hazardous areas in the case of devices with external operation (position adjustment). Mounting the sensor modules and transmitter is very easy The housings of the sensor modules can be rotated up to 480. The transmitter is freely rotatable in the mounting bracket. The sensor modules and transmitter can be easily aligned when mounted. Your benefits Easy mounting due to optimum alignment of housing Easily accessible device operation Optimum readability of the onsite display (optional) Easy pipe installation due to optional alignment of the modules. The FMD71 high-temperature version may only be insulated up to a certain height. The maximum permitted insulation height is indicated on the devices and applies to an insulation material with a heat conductivity 0.04 W/(m x K) and to the maximum permitted ambient and process temperature. The insulation height is not indicated on hygienic connections. Ambient temperature (T A ): 70 C (158 F) Process temperature (T P ): 150 C (30 F) The data were determined under the most critical application "quiescent air". A 1 B A001075 A Ambient temperature B Process temperature 1 Insulation height Insulation material Endress+Hauser 5
Installing the sensor modules General installation instructions Due to the orientation of the sensor modules, there may be a shift in the zero point, i.e. when the vessel is empty or partially full, the measured value does not display zero. Always install the sensor module HP below the lowest measuring point. Always install the sensor module LP above the highest measuring point. Do not mount the sensor modules in the filling curtain or at a point in the tank which could be affected by pressure pulses from an agitator. Do not mount the sensor modules in the suction area of a pump. The adjustment and functional test can be carried out more easily if you mount the sensor modules downstream of a shutoff device. Mounting sensor modules with PVDF process connections!warning Risk of damage to process connection! Risk of injury! Sensor modules with PVDF process connections must be installed with the mounting bracket supplied! The mounting bracket can be installed on pipes with a diameter of 1¼" to " or on walls. A0017514 The mounting bracket is included in the delivery. Ordering information: Product Configurator, "Enclosed accessories" section, "PA" version or as separate accessory (Part No.: 711016). Dimensions ( 53). Installing the transmitter The transmitter is installed with the mounting bracket supplied. The mounting bracket can be installed on pipes with a diameter of 1¼" to " or on walls. A001145 The mounting bracket is included in the delivery. If an additional mounting bracket is required (e.g. for a PVDF process connection), it can be ordered as follows: Product Configurator, "Enclosed accessories" section, "PA" version or as separate accessory (Part No.: 711016). Dimensions ( 53). 6 Endress+Hauser
Sensor and transmitter cable Designation Length Version 1) Sensor cable PE-X 1.8 m (6 ft) BC 4.57 m (15 ft) CC 10.67 m (35 ft) DC 30.48 m (100 ft) FC 45.7 m (150 ft) GC Transmitter cable PE-X 1.8 m (6 ft) BC 4.57 m (15 ft) CC 10.67 m (35 ft) DC 1) Product Configurator, "Cable length" section Technical data for PE-X cable: Temperature resistance: 40 to +80 C ( 40 to +176 F) Flame resistance: to DIN 6033-1- and DIN EN 5066--5 Halogen-free: to DIN VDE 047 part 815 Oil-resistant: to DIN EN 60811--1 Other: UV-resistant to DIN VDE 076-605 Bending radius: min. 34 mm (1.34 in), permanently installed Endress+Hauser 7
Environment Ambient temperature range Storage temperature range Climate class Degree of protection Without onsite display: 40 to +80 C ( 40 to +176 F) With onsite display: 0 to +70 C ( 4 to +158 F) Extended temperature operation range with limitations in optical properties, such as display speed and contrast, for example: 40 to +80 C ( 40 to +176 F). For devices for use in hazardous areas, see Safety Instructions. The device can be used in this temperature range. The values of the specification, such as thermal change, may be exceeded. 40 to +80 C ( 40 to +176 F) Class 4K4H (air temperature: 0 to +55 C ( 4 to +131 F), relative humidity: 4 to 100 %) fulfilled as per DIN EN 6071-3-4 (condensation possible) IP66/68 NEMA 4x/6P IP 68 degree of protection for T17 housing: 1.83 mho for 4 h Vibration resistance Housing Test standard Vibration resistance Aluminum and steel housing IEC 6198-3 Guaranteed for: 10 to 60 Hz: ±0.15 mm (±0.0059 in); 60 to 500 Hz: g in all 3 planes Electromagnetic compatibility Electromagnetic compatibility to EN 6136 Appendix A and NAMUR Recommendation EMC (NE1). For details refer to the Declaration of Conformity. Maximum deviation: < 0.5 % of span All EMC measurements were performed with a turn down (TD) = :1. 8 Endress+Hauser
Process FMD71 process temperature limits 5 to +15 C ( 13 to +57 F) High-temperature version: 15 to +150 C (+5 to +30 F); see ordering information for feature 610, version "NB". For saturated steam applications, use a Deltabar FMD7 with a metal process isolating diaphragm or provide a siphon for temperature isolation when installing. Pay attention to the process temperature range of the seal. See also the following table. Seal Notes Process temperature range Version 1) Threaded connection or flange Hygienic process connections FKM Viton - 5 to +15 C ( 13 to +57 F) - A FKM Viton FDA 3), 3A Class I, USP Class VI 5 to +15 C (+3 to +57 F) 5 to +150 C (+3 to +30 F) B Kalrez, Compound 4079 - +5 to +15 C (+41 to +57 F) +5 to +150 C (+41 to +30 F) ) - D NBR FDA 3) 10 to +100 C (+14 to +1 F) - F NBR, low temperature - 40 to +100 C ( 40 to +1 F) - H HNBR 4) FDA 3), 3A Class II, KTW, AFNOR, BAM 5 to +15 C ( 13 to +57 F) 0 to +15 C ( 4 to +57 F) G EPDM 70 FDA 3) 40 to +15 C ( 40 to +57 F) - J EPDM 91 4) FDA 3), 3A Class II, USP Class VI, DVGW, KTW, W70, WRAS, ACS, NSF61-15 to +150 C (+5 to +30 F) K FFKM Kalrez 6375 - +5 to +15 C (+41 to +57 F) - L FFKM Kalrez 7075 - +5 to +15 C (+41 to +57 F) - M FFKM Kalrez 61 FDA 3), USP Class VI 5 to +15 C (+3 to +57 F) 5 to +150 C (+3 to +30 F) N Fluoroprene XP40 FDA 3), USP Class VI, 3A Class I +5 to +15 C (+41 to +57 F) +5 to +150 C (+41 to +30 F) P VMQ silicone FDA 3) 35 to +85 C ( 31 to +185 F) 0 to +85 C ( 4 to +185 F) S The process temperature ranges indicated here refer to the permanent operation of the FMD71. For cleaning purposes, a higher temperature (max. 150 C (30 F)) may be applied for a short period (max. 30 min.). 1) Product Configurator, "Seal" section ) 150 C (30 F) for high-temperature version 3) Food-safe FDA 1 CFR 177.600 4) These seals are used for devices with 3A-approved process connections. Applications with changes in temperature Frequent extreme changes in temperatures can temporarily cause measuring errors. Temperature compensation takes place after a few minutes. Internal temperature compensation is faster the smaller the change in temperature and the longer the time interval. For further information please contact your local Endress+Hauser Sales Center. FMD7 process temperature limits Device Process connections with internal process isolating diaphragm Process connections with flush-mounted process isolating diaphragm (flange) Limits 40 to +15 C ( 40 to +57 F) 40 to +100 C ( 40 to +1 F) Endress+Hauser 9
Pressure specifications!warning The maximum pressure for the measuring device depends on the lowest-rated element with regard to pressure. ( 11), "Measuring range" section and ( 31) "Mechanical construction" section ( 11), "Measuring range" section The maximum pressure for the measuring device depends on the lowest-rated element with regard to pressure. See the following sections: The MWP (maximum working pressure) is specified on the nameplate of the individual sensor module. This value refers to a reference temperature of +0 C (+68 F), or +38 C (+100 F)for ANSI flanges, and can be present at the device for an unlimited period. Observe pressuretemperature dependency. Please refer to the following standards for the pressure values permitted at higher temperatures: EN 109-1: 001 Tab. 18. With regard to their stability-temperature property, the materials 1.4435 and 1.4404 are grouped together under 13E0 in EN 109-1 Tab. 18. The chemical composition of the two materials can be identical. ASME B 16.5a 1998 Tab. -. F316 ASME B 16.5a 1998 Tab..3.8 N1076 JIS B 0 The test pressure corresponds to the over pressure limit of the individual sensor modules (OPL = 1.5 x MWP 1) ) and may only be applied temporarily so that no permanent damage develops. The Pressure Equipment Directive (EC Directive 97/3/EC) uses the abbreviation "PS". The abbreviation "PS" corresponds to the MWP (maximum working pressure) of the measuring device. In the case of sensor range and process connections where the over pressure limit (OPL) of the process connection is smaller than the nominal value of the sensor, the device is set at the factory, at the very maximum, to the OPL value of the process connection. If you want to use the entire sensor range, select a process connection with a higher OPL value (1.5 x PN; MWP = PN). 1) Formula does not apply to the FMD7 with a 40 bar (600 psi) measuring cell. 30 Endress+Hauser