Keiki MRG-10 User Manual Download Page 52

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Safety Instructions

Microwave Radar Gauge

MRG-10

IMQ 08 ATEX 003

II 1/2 GD II 2 G Ex ia IIC T4

Summary of Contents for MRG-10

Page 1: ...Document No KF05 001G MRG 10 User s Guide User s Guide User s Guide User s Guide...

Page 2: ...that incorrect usage may result in death or serious injury to the operator CAUTION Indicates that incorrect usage may result in injury to the operator or damage to the equipment Warning Caution Warnin...

Page 3: ...or of the equipment The representative or dealer of this equipment must supply this User s Guide to the user who will actually operate the equipment 4 The User s Guide should be replaced if it is lost...

Page 4: ...2 Cables 3 2 3 3 Load 3 2 3 4 Power Supply 3 2 3 5 Grounding 3 2 3 6 Arrester replacement 3 3 4 Configuration method 4 1 4 1 Display Panel Key SW 4 1 5 Configuration 5 1 5 1 Basic Settings 5 1 5 2 Ne...

Page 5: ...e tasks such as changing circuit boards or internal software Chapter 1 reviews some basic concepts of radar based level gauging Chapter 2 describes how to assemble a gauge and how to mount it onto a t...

Page 6: ...4 20mA current output signal Settings can be made by a HART communicator or PC based setup software Volume calculation function Volume calculation function is based level measurement of the remaining...

Page 7: ...suring system MRG 10 can be configured with its onboard 4 key switches a handheld terminal or remotely from a personal computer via a modem The MRG 10 is connected to a PLC or power supply unit Exampl...

Page 8: ...requirements The antenna tip should extend past the nozzle 10 mm or more If the antenna tip is located inside the nozzle echo disturbances may be generated which will negatively affect measurement per...

Page 9: ...are present in the radar beam Obstacles in the radar beam may reduce the measuring range 2 1 3 Key factors for measurement 1 The strength of the microwave reflection from the liquid surface is propor...

Page 10: ...hese values are rough estimates and are strongly influenced by the measuring conditions Calm surface 4 Cone 6 Cone 8 Cone 0 10 20 0 10 20 0 10 20 0 10 20 a b c a b c a b c m Rod a b c Turbulent surfac...

Page 11: ...6 148 NPT 1 1 2 364 100 148 38 Rod Short Rod Long Extended Part 148 238 176 106 226 346 215 265 188 140 92 154 52 4 Cone Antenna 6 Cone Antenna 8 Cone Antenna 2 2 Dimensions Weights MRG 10 except ante...

Page 12: ...MRG 10 gauge is mounted with a flange of the following specifications Cone antenna Rod antenna Maximum thickness 29mm ANSI Class 150 8 2 3 Tools The following tools are needed for installation of MRG...

Page 13: ...required for installation of the cone antenna 2 Mount the flange on top of the cone plate Secure the flange with the locking nut Make sure that the nut is fitted tightly to the flange Warning Make sur...

Page 14: ...hen the MRG 10 is installed on pressurized tanks 3 Carefully insert the antenna adapter of the transmitter into the sleeve Secure the antenna adapter with the union nut Make sure that the antenna adap...

Page 15: ...nical Installation Mechanical Installation Mechanical Installation 2 8 2 5 Mounting rod antenna Warning Do not damage antenna Damaged antenna may cause gas leakage if the MRG 10 is installed on a pres...

Page 16: ...hanical Installation Mechanical Installation 2 9 Fix rod antenna to flange Place the gasket on the tank nozzle Carefully fit the flange and the cone antenna on the tank nozzle Tighten the assembly wit...

Page 17: ...pipe or ladder Microwave reflections from elongated metal objects such as thin pipes or ladders rungs are largest when the axis of such objects are in parallel with the electric field The orientation...

Page 18: ...am 3 Center of the Tank When the MRG is installed at the center of the tank measurement may be adversely affected or become unstable because of microwave side lobes non main beams Thus center of tank...

Page 19: ...tank wall to avoid influences from edge reflections off channel walls and the liquid surface For flat wall tank applications install the MRG so the axis of the electric field is perpendicular to the t...

Page 20: ...ver is screwed onto the case and tightened The gasket provides sealing between the housing and front cover and as such the front cover should be securely and firmly screwed onto the case 1 Unscrew and...

Page 21: ...ed twisted pair for connection Cross sectional area of conductor is 0 2 2 5mm2 AWG24 14 Cable entry 2 M20 1 5 cable diameter 10mm max 3 3 Load Minimum load for HART 250 Maximum load Non Ex 900 EX 540...

Page 22: ...Loosen the 4 screws indicated by the arrows in the schematic below and remove the LCD panel Step 2 Loosen the Arrester PWB fixing screw indicated by the arrow Step 3 Remove and replace the Arrester PW...

Page 23: ...de the menu number or registered data is displayed 4 1 2 Key SW 1 ENT Enter key Changes display from measurement mode to configuration mode Moves to the lower layer from main menu to sub menu Moves th...

Page 24: ...ration mode 3 ENT 1 1 4 1 2 5 1 3 6 1 4 7 ENT 10 000 Default value 8 ENT 10 00 0 0 blinks 9 5 10 00 5 5 Push 5 times 10 ENT 10 0 0 5 11 3 10 0 7 5 12 ENT 10 0 75 13 2 10 2 75 14 ENT 1 0 275 15 4 1 6 2...

Page 25: ...l operation mode 2 ENT 1 3 2 3 Volume Main menu 4 ENT 3 1 5 3 3 4 Volume point Sub menu 6 ENT 320 Volume point 1 7 321 Volume point 2 8 ENT 000 00 Default value 9 ENT 000 0 0 0 blinks 10 7 000 0 7 7 P...

Page 26: ...in Feet units Note When Measuring Unit is changed units of other parameters also change 1 4 G parameter distance between flange reference point and measuring reference point Parameter Default Value D...

Page 27: ...Value Description 3 000 23 000 Level 0 000 Parameter range in metric m units 3 000 23 000 Ullage 0 000 Parameter range in metric m units 0 000 100 000 Volume 0 000 0 000 100 000 Amplitude 0 000 dB Wh...

Page 28: ...0 Parameter range in metric m units If measurement unit is ft display will be converted to show feet units 3 4 Volume point 320 339 Parameter Default Value Description 0 99999 99 0 000 Display will be...

Page 29: ...onverted to show feet units 3 7 Length of the tank Parameter Default Value Description 0 000 20 000 1 000 Parameter range in metric m units If measurement unit is ft display will be converted to show...

Page 30: ...ed to show feet units 4 4 Span Calibration Parameter Default Value 0 90 1 10 1 00 5 Advanced Setting 5 1 Averaging Time Parameter Default Value Description 1 120 10 Measuring value is averaged in acco...

Page 31: ...ngth echo defined as surface echo 1 First Echo First echo defined as surface echo 5 7 Bottom Visible Parameter Value Description 0 Bottom Visible When tank bottom echo is larger than surface echo such...

Page 32: ...ow feet units 6 3 Amplitude threshold 610 619 Parameter Default Value Description 0 10000 0 1 100dB If you create a noise table incorporating settings 6 1 6 3 you can produce a line chart such as that...

Page 33: ...echo re search 7 3 User Reset Parameter Value Description 0 1 Initialization Initialized by 1 setting 7 4 Error Status Indication Error status E 00 No error E 01 Internal ROM Error E 02 Internal RAM E...

Page 34: ...ottom of tank C is normally set to 0 If it is necessary to measure negative level please set the distance H Set the distance from ref point to measurement range see 5 2 1 Parameters of tank dimensions...

Page 35: ...mber and click the set button When communication is completed successfully ID Version No and Product Name will appear in the boxes 3 By selecting other tabs such as the sample below you can set any pa...

Page 36: ...ret these echoes as coming from the liquid surface Set up H to avoid this problem All echoes within this area would be outside of the measuring range and ignored 5 3 2 Noise Table If there are disturb...

Page 37: ...1 you will need to set data 610 619 for amplitude values 6 Amplitude points must correlate to the distances defined under 6 2 Select table address ex 610 and enter amplitude data then click ENT to com...

Page 38: ...nd this function will become invalid Also by using the PC configuration software you can add or change the position of the noise table with a right click 1 On the Tank Spectrum tab when the START butt...

Page 39: ...hen noise level is high over the whole range the threshold level over the entire range can be set by the noise margin parameter as shown below Noise margin is set at 13dB 10dB above 3dB default value...

Page 40: ...Tank Table Set up Linearization Point Number It is possible to set up 20 points each for level and volume respectively in the Tank Table which are linearly interpolated between points More than two p...

Page 41: ...panel To return to the main menu click ESC again Click ESC once more to go to the measurement mode Note When using PC configuration software enter all data in the following menu then click WRITE Setti...

Page 42: ...rger echo from the tank bottom and the gauge can not distinguish the surface reflection echo from the bottom echo Bottom Visible Flag and Bottom Window parameters of the gauge function to avoid the tr...

Page 43: ...n if obstacles are located near to the beam area measurement will not be affected Measuring coverage can be extended to low dielectric constant liquids 2 Disadvantages Material of the pipe metal etc m...

Page 44: ...h YLow XHigh XLow F Span calibration value XHigh High reference level value XLow Low reference level value YHigh High measured level value YLow Low measured level value 5 9 3 3 Offset compensation Off...

Page 45: ...to 3m R C G 20m H 1 7 0 to 23m Offset of level value on LCD 1 8 99 999 99 999 m Analog Output Parameter 2 1 0 Level 1 Ullage 2 Volume 3 Amplitude dB Minimum Output 2 2 3 to 23m level Ullage 0 to 100 V...

Page 46: ...2 2mA Offset Calibration 4 3 1 to 1m Span Calibration 4 4 0 9 to 1 1 Averaging Times 5 1 1 to 120sec Noise Margin 5 2 0 10000 1 100 dB Research Delay 5 3 1 to 120sec Alarm Delay 5 4 1 to 120sec Bottom...

Page 47: ...m 65 Serial communication HART communication Key switch 4 keys for configuration Display 5 digit LCD and bar graph Power Supply voltage 16 28 VDC Ex 16 36 VDC Non Ex Specification for HART Ripple 47 1...

Page 48: ...ture effect 0 01 10 K Free space reflection from flat metal surface ambient temperature 25 C 77 F atmospheric pressure Environment resistance Ambient temperature 20 70 C 40 158 F Storage temperature 4...

Page 49: ...60079 0 2006 EN 60079 11 2007 EN 60079 26 2004 Cable Connection Cable type Shielded twisted pair Cross section area of cable 0 2 2 5 mm2 AWG24 14 Cable entry 2 M20X1 5 NPT 1 2 cable dia 6 5 9 mm Groun...

Page 50: ...cation address Check the cable and HART modem connections and make sure that correct cable and resistor are used Display Panel window is blank Check the power supply Check the status of the gauge in t...

Page 51: ...CATION NON HAZARDOUS LOCATION MRG 10 Intrinsic Safety Parameters Ex ia IIC T4 Parameters Ui 28V Ii 93mA Pi 0 65W Ci 0 Li 0 Ambient Temperature Limits 20 Ta 60 deg C CONTROL DRAWING 2008 2 8 5198 5640...

Page 52: ...Safety Instructions Microwave Radar Gauge MRG 10 IMQ 08 ATEX 003 II 1 2 GD II 2 G Ex ia IIC T4...

Page 53: ...out according to the EN60079 17 Only approved spares supplied by the manufacturer or approved agent should be used 5 Ambient temperature range This equipment is certified for use in ambient temperatur...

Page 54: ...an internal limiting resistor of 300 ohm minimum This equipment is not insulated from earth due to the use of surge light protection provided by installation 9 Degree of Protection This equipment if c...

Page 55: ...y 2009 1st Edition Control Division I 2 16 46 Minami Kamata Ohta ku Tokyo 144 8551 Japan TEL 81 3 3737 8621 FAX 81 3 3737 8665 Web http www tokyo keiki co jp Copyright 2009 by TOKYO KEIKI INC All righ...

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