Operator Manual. Transmitter Model RT - R and RT - RH. Programmable transmitter in 2 wire - technique

Transcription

1 Operator Manual Transmitter Model RT - R and RT - RH Programmable transmitter in 2 wire - technique

2 Contents Page Contents...2 Page...2 Overview to the tables...2 Overview to the Pictures...2 Topics...4 Installation and operation...4 Scope of supply...4 Accessories...4 Content of rating sticker Installation location Installation Connection diagram Operation Line resistance ( Offset resistance )...7 Communication...8 PC - Requirements...8 RKA-interface...8 FSK - Interface...10 FSK - BUS...11 Instrument Data...12 Maintenance...13 Description...14 Technical Data...15 Input...15 Output...17 Power Supply...18 Electro Magnetic Compatibility...18 Common Data...19 Fault finding and service...20 Packing...21 Overview to the tables Table 1 : Standard parameters...12 Table 2 : Sensor Range, Minimum Span...16 Table 3 : Fault description...21 Overview to the Pictures Picture 1: Installation in a connection-box...5 Picture 2 : Connection diagram...6 Picture 3 : PC - communication with RKA - interface...9 Picture 4 : PC - communication with FSK - interface and FSK - modem...10 Picture 5 : PC - communication with FSK - BUS ( Example )...11 Picture 6 : Block Diagram...14 Picture 7 : Output current range, Behavior on failure...17 Page 2

3 Important safety note! Under nonobservance of proper installation rules and safety note or inappropriate use of the transmitter one may be hurt or fatal injures may occur. Due to wrong assembly, erroneous programming or inadequate voltage supply the output signal of the transmitter may be out of order i.e. the appropriate sensor state is not given at the output. For safe operation of the transmitter RT-R/RT-RH are proper packing and storage, professional installation, service and maintenance basic assumptions. Only trained personnel are may carry out installation, operation and maintenance Especially pay attention to the contents of this instruction manual the safety regulations for the installation and the use of electrical equipment as well as the regulations and the guidelines for the explosion proof installations. the mentioned regulations, standards and guidelines in this instruction are valid for Germany. Using of this device in other countries the national rules are to be considered. The transmitter has left the factory in an impeccable condition. The safety note must be considered to grant reliable operation. The user has to grant, that all equipment connected to the transmitter is in accordance to national regulations, in Germany to the safety standards according to appropriate paragraphs in VBG 4. For further information about the transmitter and / or this instruction manual please contact Rössel-Messtechnik. The complete address is given on the last page of this manual. Page 3

4 Topics The transmitter RT-R/RT-RH converts the low-level signal from thermocouple or resistance thermometer into a high-level standard signal ranging from 4 to 20mA. The non-linear characteristic of the temperature sensor is, depending on programming, given to the output as EMF or resistance linear or temperature linear. The communication between transmitter and PC occurs in the case of the model RT-R with the aid of an adapter ( RKA ) or in case of the model RT-RH via a special HART - FSK modem. Installation and operation Scope of supply 1 off. transmitter RT-R / RT-RH including this manual 1 off. additional rating sticker Accessories RKA - interface ( RT-R ) : Rössel communication adapter for connection to the RS-232 port at the PC. FSK - interface ( RT-RH ) : FKS modem for connection to the RS-232 port at the PC. Programming software : For programming of the transmitter RT-R/ RT-RH. Content of rating sticker Type : RT-R - transmitter with RKA-interface RT-RH - HART transmitter with FSK - interface Input : Sensor type Range : measuring range for Sensor scaling to ma No. : Serial number Please read this instruction manual before using the equipment! Page 4

5 Installation location Usage position : Any Installation Caution The regulations for installation of transmitters in Ex-completion in hazardous areas are to be observed. The determination for installation of electrical systems in hazardous areas and the conformance certificate must be observed. Installation-example Picture 1: Installation on a DIN rail Page 5

6 ( see picture 2 ) Connection diagram Terminals for Sensors ϑ ϑ ϑ + - Terminal for power supply Us 5. Terminal for RKA-interface Picture 2 : Connection diagram 1 2 Front label type RT-RH 3 4 Transmitter Typ:RT-RH RKA Eingang / Int Messumformer/ Ausgang/O tp t + U S U A 1. Resistance thermometer or resistance measurement in 4 wire technique 2. Resistance thermometer or resistance measurement in 2 - wire technique. 3. Resistance thermometer or resistance measurement in 3-wire technique. 4. Thermocouple or EMF measurement 5. Output signal and additional FSK-interfaces at RT-RH. 6. RKA-interface in case of RT-R. Not available in case of RT-RH. Page 6

7 Operation Warning One may not open the transmitter. An orderly function can t be insured in that case. A safe separation of electric circuits is only granted, if all connected equipment meets all requirements of the VDE 0106 T.101 or equivalent. For the spurious rejection and safety, it is necessary to misplace the input wires separately from touch endangered electric circuits. If this is not possible, an additional insulation must be in place. If grounding of intrinsically safe circuits is necessarily from the measurement side of view, it should only be done at one point. In case that any device with confirmed intrinsically safe circuit will be connected to the transmitter, an evidence has to be documented for the total interconnected circuit in accordance to DIN VDE 0165 / The maximal values given in the document of conformity have to be observed! Installation: 1. Open the box-cover or cabinet door 2. Connect sensor and power supply 3. Close the cover or door 4. Turn on the power supply 5. Check transmitter, parameters and functions Line resistance ( Offset resistance ) Only necessary if: - The resistance thermometer- or resistance measurements are in 2-wire technique. Not necessary if: - Resistance thermometer- or resistance measurements are in 3 wire technique ( supposed that the line resistance of each conductor are identical ) - Resistance thermometer- or resistance measurements in 4-wire technique. - Tension- or thermocouple measurements Line resistance compensation per PC-software Choose menu: instrument data/ specialist / load instrument Line resistance value fill into field Offset Resistance. This value is subtracted from measured sensor resistance. Page 7

8 Communication The communication with the transmitter occurs via the PC-software. PC - Requirements (Minimum requirements) Personal Computer : IBM or compatible. RAM memory : 640 KB RAM Disk drive : 3½", 1.44 MB Monitor : Monochrome, Color Graphic card : EGA, VGA Interface : 1 x serial RS 232C 1 x parallel: for Printer ( Option ) Operating System : MS-DOS Version 3.3 and ++ / WINDOWS 95/98 If the software is used under WINDOWS 95/98, no other task should run for faultless communication. Even a read / write circle to the hard disk may interrupt the communication. Depending on the communication between PC and transmitter following interfaces are available: RKA-interface ( RKA = Rössel communication adapter) The RKA - interface is not suitable for bus-system. To establish communication to the PC is possible additional to modus single under modus bus when the bus address is set to 00. Changing of bus - address is possible under communication in the submenus Device/Change Bus address Attention Using RKA ( RS 232 to PC ) a galvanically insulation is necessary when the 4 to 20 ma output and PC are grounded, otherwise erroneous measurements are possible. Please observe correct polarity of the RKA at the transmitter. Communication using RKA is permitted only outside hazardous areas! Equipment used: - PC and PC-Software - Rössel communication adapter RKA Page 8

9 An online-communication is possible with RKA-interface: PC / Laptop / Notebook RS232: COM 1 / COM 2 Burden RKA Power Supply - + * Sensor Input Sensor or Simulator Picture 3 : PC - communication with RKA - interface * Important note The minimum power supply at the terminal (see data sheet) must be guaranteed under any circumstances. Please pay attention to the burden calculation, because the transmitter during programming mode has the highest current load. (see data sheet). Page 9

10 FSK - Interface (FSK = Frequency Shift Keying) Equipment used: - PC plus PC-program software - FSK - modem incl. connection cable. Connection to points ( A B ) - or ( A C ) - Burden resistance 250 Ω up to 1000 Ω PC / Laptop / Notebook RS232: COM 1 / COM 2 Burden FSK-modem C A B Power Supply - + * Sensor Input Sensor or Simulator Picture 4 : PC - communication with FSK - interface and FSK - modem * Important note The minimum power supply at the terminal (see data sheet) must be guaranteed under any circumstances. Please pay attention to the burden calculation, because the transmitter during programming mode has the highest current load. (see data sheet). Page 10

11 FSK - BUS The FSK - interface has bus ability. Communication setup for a bus system with programming software is only possible with transmitters having a bus address between 01 and 15. ATTENTION: Every bus address may be connected at the bus only once simultaneously. With bus address 00, communication is only possible with a single device. Changing of bus - address is possible under communication in the submenus Device/Change Bus address. Under BUS operation there is no analog output signal available. It is fix set to a value <4mA, typically 3,9mA. PC / Laptop / Notebook RS232: COM 1 / COM 2 Burden Sensor or Simulator FSK- Modem C A B Power Supply - + * - + * Sensor Input Sensor Input Sensor or Simulator Picture 5 : PC - communication with FSK - BUS ( Example ) Important note The minimum power supply at the terminal (see data sheet) must be guaranteed under any circumstances. Please pay attention to the burden calculation, because the transmitter during programming mode has the highest current load. (see data sheet). Page 11

12 Instrument Data Standard parameters in delivery condition. ( See Table 1 ) Customer specific adjustments are possible on request. Sensor Standard parameter Range C Output ma TAG Number Thermocouple Type K, temperature linear, internal CJC Filled with at least one alphanumeric character Description All character are SPACE BUS Identifier All characters are SPACE Sensor serial number 1 UOM Temperature C Offset values All zero Output failsafe Upscale Damping / Time constant 1,0 s Table 1 : Standard parameters All parameters due to delivery status may be reactivated on demand using the PC software. Page 12

13 Maintenance ATTENTION Any work that has been done at an explosion proof transmitter by a person not authorized by the instrument manufacturer or not skilled the transmitters have to be examined by an expert before further use. In case that the work has been done by a manufacturer authorized person, no investigation by an expert is necessarily. Safety instructions due to explosion proof are to be observed prior to start any work at the equipment. It is to be assumed, that a safe use is not possible - if the transmitter shows visible defects, - if the transmitter doesn t work, - after longer storage under unfavorable circumstances, - according to high stress during transport. In these cases the device is not longer dependable. It must be removed from operation and marked accordingly. The defective equipment should be locked for avoidance of a further inadvertent use. The transmitters model RT-R / RT RH need no maintenance. In case of any malfunction first the temperature sensor is suspect and than wiring, power supply, programming and communication. Page 13

14 Description Sensor Input Filter Ex Protection Circuits Cool Joint Comp. Multiplexer Preamplifier A/D-Converter Output Driver External- Power - Supply Internal Power Supply CPU Firmware RAM ROM communication EEPROM RKA FSK Picture 6 : Block Diagram Sensor signals ( mv or Ω ) are routed via a multiplexer to an input filter, a preamplifier and an A / D converter. After evaluation of the signals an error analysis occurs together with an adoption to the programmed parameters. Outputting of the analog signal is done via a galvanically isolation to the power amplifier. A failsafe action checks the sensors impedance to a maximum value. The internal power supply is filtered and stabilized from a galvanically isolated DC / DC converter. Checking and supervisory of internal parameters is done on a regular base. Superceding of limit parameters activate an error status. Operating data, firmware and transfer tables are stored in ROM and RAM circuits. Storage of programmed data as well as limits of the internal temperature occurs in an EEPROM. The RKA - interface allows communication with a PC. Using a FSK interface communication is possible to other devices, f.e. to a hand - held terminal. Page 14

15 Input Technical Data Sensor Input Cool Joint Compensation Cool Joint Temperature Drift Range Linearization Permitted deviation incl. Characteristic deviation Resistance Thermometer Resistance Measurement 2-, 3- and 4-wire system Thermocouple Voltage Measurement 2-wire system Intern : automatic Extern : -55 C C None : no action ± 0.1 K / 10 K Programmable, see following table Pt100, Ni100 DIN IEC standardized characteristics: Type K, J, N, T, E, R, S, B Acc. to DIN 43710: Type L Acc. to ASTM E 988/1751: Type W, W3, W5 0,2 % of span; 0,2 % of span; min. 0,1 Ω min. 10 µv Excitation current 0,2 ma < 125 na Max. overload Open or shortened input -0, ,0 V terminals permitted ( Sensor- ) Failsafe Threshold limit>450 Ω > 85 mv via internal resistance Short circuit Threshold limit < 10 Ω ( Pt100 / Ni100 ) not for resist. measure ( Ω. ) permitted Line resistance Sum : 50 Ω. Loss of energy Digital filter with adjustable time constant ( T = sec. ) set at 0 sec filter not active Page 15

16 Sensor Type, Ranges, Minimal Span Sensor type Characteristic Range Range Upper End Minimum Span K linear C C 50 C J linear C C 50 C T linear C C 50 C E linear C C 50 C R linear C C 200 C S linear C C 200 C N linear C C 50 C L linear C C 50 C B linear 80.0 C C 300 C W linear 0.0 C C 250 C W3 linear 0.0 C C 250 C W5 linear 0.0 C C 250 C Ni100 linear C C 10 C Pt100 linear C C 15 C Resistance linear 0.0 Ω Ω 5 Ω Tension linear mv 85.0 mv 2.0 mv K Uncompensated µv µv 2.0 mv J Uncompensated µv µv 2.0 mv T Uncompensated µv µv 2.0 mv E Uncompensated µv µv 2.0 mv R Uncompensated µv µv 2.0 mv S Uncompensated µv µv 2.0 mv N Uncompensated µv µv 2.0 mv L Uncompensated µv µv 2.0 mv B Uncompensated 17.0 µv µv 2.0 mv W Uncompensated 0.0 µv µv 2.0 mv W3 Uncompensated 0.0 µv µv 2.0 mv W5 Uncompensated 0.0 µv µv 2.0 mv Ni100 Uncompensated 69.5 Ω Ω 5.0 Ω Pt100 Uncompensated 19.5 Ω Ω 5.0 Ω Table 2 : Sensor Range, Minimum Span Page 16

17 Output Output Current Current Limit Failsafe Permitted Burden Internal Power Consumption Start-up Time Influence of temperature drift ma, Upscale characteristic 23,5 ma in normal operation Programmable upscale or downscale US 12V R B = I a max Ia max = max. perm. ouputcurrent US = power supply voltage < 3,0 ma ( RT-R ) < 3,5 ma ( RT-RH ) < 4 sec after switch-on of power supply Resistance Thermometer Voltage Measurement Thermocouple Resistance Measurement <0.05 % /10 K of span <0.05 % /10 K of span and < 0.02 Ω /10 K and < 10 µv /10 K on lower range limit on span <0.05 % /10 K of span <0.02 % /10 K of span Linearity Error 0,1 % of span Long Term Drift 0,15 % of span Accuracy 0,1 % of span Output Current Action ( NE43 ) : if : Failsafe downscale ( 3,6 ma ) or upscale ( 21 ma ). im : Output inside range, between 3.8 ma and 4 ma and between 20.0 ma and 20.5 ma the outputcurrent is linear controlled. He will be clamped to 3.8 ma resp ma in case the inputrange is left, however witout leaving programmed limitsand without leaving sensor range. 4,0 ma Range 20.0 ma if 3.6 ma 3.8 ma im 20.5 ma if 21.0 ma Picture 7 : Output current range, Behavior on failure Page 17

18 Power Supply Power supply Influence to output signal Galvanically Isolation Switch-on Current Peak 12, V DC < 0,002 % / V of span 500 Veff, 50/60 Hz continuously typical 30 ma Electro Magnetic Compatibility Test sequence Burst on power supply-, Signal- und Data Wire Emitted HF field: 80 MHz...1 GHz Electro Static Dicharge : Contact Discharge Discharge in Air Electro magnetic field under wire dependant launching: 150 khz...80 MHz Applicability Influence * Standard 2 kv < 2 % EN V/m < 2 % EN kv 8 kv B B EN V < 2 % EN Values given dependant on upper range limit Page 18

19 ommon Data Ambient Temperature -10 C C Transport and Storage Temperature -25 C C Relative Humidity 95 % w/o condensation Rate of Measurements 3 Measurements / Sec Test Voltage acc. to DIN VDE 0411 Input / Output 500 V DC Cicuits /Housing 500 V DC Electrical Terminals Screw terminals for max. 2,5 mm 2 wire gage Housing, Color 22,5x104x75 mm (WxHxD), grey Utility Site Any Weight approx. 50 g Protection IP20 Interface ( Data format HART - Protocol ) Rössel Communications Adapter ( RKA ) for programming at shop floor ( not inside hazardous areas ) via PC. Frequency Shift Keying FSK for programming at shop floor via PC, remote programming and bus operation. Page 19

20 Fault description No output current Output current constant inside 3,8 ma... 20,5 ma Output current constant at 3,92 ma Output current constant 3,8 ma or 20,5 ma Output current constant < 3,8mA Output current constant > 20,5mA Measured value doesn t match real value and / or Output signal doesn t match input signal Floating output signal Fault finding and service possible source / possible solution Wrong polarity of power supply Power supply interrupted Simulator mode set by software Too low power supply at terminals Sensor defect Simulator connected to input terminal Polling address not 0, Transmitter in BUS Mode Simulator mode set by software Sensor signal outside programmed range but inside sensor total range and programmed limits Failsafe downscale and lower limit superseded Failsafe downscale and a limit superseded or a fault: f.e. sensor break, short circuit, wrong programming, internal temperature was or is outside specifications Failsafe upscale and limit superseded or fault: sensor break, short circuit, faulty programming Faulty parameter for this sensor type, linearization, range, sensor wiring at RTD Measurement, CJC adjustment for TC s, offset values. Faulty sensor connection, check polarity at TC s, check wiring and line resistances at RTD s. Corrosion of input wires and/or pin connectors Power supply not inside specifications Check programming while using the software and simulate input with a proper simulator High noise level on input line, increase filter parameter. Not sufficient or faulty grounding Power supply not inside specifications Page 20

21 Fault description No communication with RT-R No communication with RT-RH Digital read measuring value mV or 999,99Ω or 999,9 C possible source / possible solution - Interface in the software not properly assigned and cabling to be checked. - Inadvertent faulty set bus address at transmitter. Check communication for single operation and bus operation. - Set bus address to 0. Interface in the software not properly assigned and cabling to be checked.. BUS - address not valid. Check communication for single operation and bus operation. Check burden resistor Check modem wiring both at PC and output circuit Input signal out of range. Override A/D-converter. Check input signal. Table 3 : Fault description In case of a faulty operation a solution may be found using above mentioned symptoms. The first step should be in general a check of the power supply and all other equipment wired to the transmitter. Consecutively a check of the sensor inclusively wiring and wire routing as well as proper programming should follow. For functional control the use of a simulator at the input is recommended. Packing If the device is sent without original packing, the device must be protected sufficiently against shocks with air cushion film, expanded plastics or cardboard. The thickness of the upholstery must be adapted in accordance with the wrapping, the shipping method and the device weight. A sticker " Caution Fragile " should be on the wrapping as well as Caution, Sensitive electronic equipment. If the device may be set at transportation to high humidity or even sea water, it must be welded into an airproof film in which another a suitable desiccant is located. The amount of the desiccant for the wrapping volume is to be adapted for the expected transport duration (at least 3 months). Page 21

22 Stand : 05/02 Technical improvements reserved Copy, reproduction and translation, even partial, is forbidden without written permission of the Roessel Messtechnik GmbH. Rössel Messtechnik GmbH & Co,Lohstr. 2, D Werne, Phone: +49/2389/409-01, Fax: +49/2389/409-80, info@roesseltemp.de, Internet: Page 22