KROHNE OPTIWAVE 7300 C Handbook
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KROHNE OPTIWAVE 7300 C Handbook

Radar level meter for distance, level and volume measurement of liquids, pastes and solids
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  • Page 2: Table Of Contents

    Handbook OPTIWAVE 7300 C Content Introduction......................................4 General ..........................................4 0.1.1 Description of the device......................................4 0.1.2 Legal matters ......................................... 4 Safety ............................................. 5 0.2.1 Use in hazardous areas ......................................5 0.2.2 Documentation symbols......................................5 Visual inspection ........................................5 0.3.1 Instrument Integrity ........................................
  • Page 3 Handbook OPTIWAVE 7300 C Service and maintenance................................. 67 General notes........................................67 Signal converter replacement ....................................67 Modifying antenna extension length ..................................68 Technical data....................................70 Technical data........................................70 7.1.1 Technical data extract......................................70 7.1.2 Blocking distance ......................................... 72 7.1.3 Hazardous areas........................................72 Dimensions and weights ......................................

  • Page 4: Introduction

    0. Introduction 0.1 General 0.1.1 Description of The OPTIWAVE 7300 C gauge is designed solely for measuring the distance, level, volume and reflectivity of the device liquids, pastes, slurries, and solids. OPTIWAVE can form part of an overfill protection system as defined in WHG if ordered with the appropriate options.

  • Page 5: Safety

    Handbook OPTIWAVE 7300 C 0.2 Safety • Follow all instructions carefully to make sure that you install the device correctly • Observe special conditions for installations requiring approved equipment • Check that that the information on the device nameplate conforms to the on-site data •...

  • Page 6: Material Compatibility

    Handbook OPTIWAVE 7300 C 0.3.2 Material compatibility Check that the flange, gasket and antenna materials are compatible with the product in the tank. Use the information from the following sources: • converter nameplate • flange • approval certificates 0.4 Standards and approvals 0.4.1 Standards...

  • Page 7: Versions And Nameplates

    Handbook OPTIWAVE 7300 C 0.5 Versions and nameplates 0.5.1 Non-Ex and Ex versions 1 Cover with display (option) 2 Wiring compartment cover 3 Socket head set locking screw for either rotating or removing the housing 4 Threaded process connection (NPT, G)

  • Page 8: Items Supplied

    1.1 Storage and handling Handling Mount OPTIWAVE 7300 C radar level meters on suitable process connections on a tank or sump. The device weighs between 8 kg/18 lb and 10 kg/22 lb. • Lift the meter by the flange using two people to avoid damaging the base of antenna.

  • Page 9: Location

    General notes This section covers positioning the process connection and installing the device. Mount the OPTIWAVE 7300 C gauge on a suitable process connection on a tank or sump. Check the following: • nozzle position in relation to the tank walls, product entry points and other objects inside the tanks.
  • Page 10 Handbook OPTIWAVE 7300 C Hazardous areas Refer to the special manuals supplied on a CD-ROM with the device. Process connections Distance of fitting from tank wall Do not install fitting on tank centreline. This causes multiple reflections and measurement errors when the device is in operation.
  • Page 11 Handbook OPTIWAVE 7300 C Other specifications for fittings For the gauge to make accurate measurements and have a good signal reflected back from the product surface: • ensure a good fit with the gauge process connection • the radar must point directly down onto the product. Angle offset tolerance ±2° from vertical •...
  • Page 12 Handbook OPTIWAVE 7300 C Threaded process connections The simplest and most economic way is to mount the level meter directly onto the tank with a GAS or NPT- threaded connection. Use a 50 mm or 2" open-end wrench or similar to screw the device onto the tank process fitting.
  • Page 13 Handbook OPTIWAVE 7300 C Avoid too many objects in the tank! Risk of measurement error! 1 RADAR beam 2 Tank support beam 3 Agitator 4 Heating tubes 5 Ladder To avoid interference with the radar beam, make sure that all tank components are located outside the beam.

  • Page 14: Liquid Applications

    Installing two devices on the tank Install any number of OPTIWAVE 7300 C radar level meters next to each other on the same tank. However, as mentioned before, do not mount on tank centreline or outside the limits specified in Distance of fitting from tank wall above.

  • Page 15: Solid Applications

    Directive 1999/05/EC for use in the member countries of the EU. OPTIWAVE 7300 C operates using a frequency band (24 GHz - 26 GHz) that is not harmonized within the According to article 6.4 of the R&TTE Directive, the product is marked by the CE sign + notified body number (0682) + Class II identifier (= alert sign).
  • Page 16 Handbook OPTIWAVE 7300 C Installations with difficult measurement conditions Agitators, other mixing equipment, filling and emptying cycles can cause foam, vortices and turbulent product surfaces. Mounting a device in a bypass chamber or stilling well are ideal solutions for these condtions.
  • Page 17 Handbook OPTIWAVE 7300 C 3. Remove the bracket (D) along with two screws (B) and washers (E) from the sunshade (F). 4. Lower the sunshade onto the device. Orientate it so that the "keyhole" (G) is at the front of the device.

  • Page 18: Metallic Tanks

    Handbook OPTIWAVE 7300 C 7. Raise the sunshade as high as possible up the housing support pillar by bracing it with one hand. Screw the two bolts tightly so that the sunshade does not slip down the pillar. Procedure - opening the sunshade 1.

  • Page 19: Non-Metallic Tanks And Free Air Applications

    Handbook OPTIWAVE 7300 C Shielding strip installation procedure 1. Place the gasket on the tank flange 2. Mount the device on the tank flange 3. Align the gasket and the device with the tank flange 4. Fasten the flanges together; making sure that there is a washer (A) under every nut and bolt. The washer must completely cover the flange hole to block RFI.

  • Page 20: Stilling Wells

    Handbook OPTIWAVE 7300 C Sites in the USA Do not use OPTIWAVE 7300 C on open-air installations or non-metallic tanks. Refer to section 1.3.1: Typical installations; general notes and Approvals for further installation information. 1.3.4 Stilling wells Applications A stilling well is recommended for these applications: •...
  • Page 21 Handbook OPTIWAVE 7300 C Floating roofs 1 Stilling well 2 Tank 3 Floating tank roof 4 Product 5 Stilling well support legs (fixed to tank bottom) 6 Sediment Installation requirements • the walls of the stilling well must be electrically conductive •...

  • Page 22: Bypass Chambers

    Handbook OPTIWAVE 7300 C • drill a pressure equalisation hole in the stilling well above the maximum product level • if foam is not present, drill holes along the length of the stilling well: this helps the product to circulate.

  • Page 23: Conical Tanks

    Used for a large variety of applications. Located above or below ground. Installation requirements Install the OPTIWAVE 7300 C meter in a stilling well when mounting on a horizontal cylindrical tank. Device in horizontal cylindrical tank without stilling well! Risk of multiple reflections and measurement error! Refer to section 1.2: Location, section 1.3.3: Typical installations;...

  • Page 24: Other Important Information

    Handbook OPTIWAVE 7300 C 1.4 Other important information 1.4.1 Process conditions Flanschtemperatur Process pressure Observe process connection operational limits! Risk of injury and damage to device! The operating pressure allowed depends on the temperature at the process connection. The mechanical properties of the process connection are influenced by temperature.

  • Page 25: Electrical Connection

    Handbook OPTIWAVE 7300 C 2. Electrical connection 2.1 Wiring 2.1.1 General notes Cable entry Electrical connection is made through two cable entries located at the back of the housing. The cable entries can be ordered with adaptors: • M20 x 1,5 •...

  • Page 26: Wiring Procedure

    Handbook OPTIWAVE 7300 C 2.1.2 Wiring Procedure 1. Fit cable gland. Disassemble the top of the cable gland, remove plug (a) then reassemble. 2. Unscrew the M4 socket head cap screw using a 3 mm hexagonal key and remove cover stop (b).
  • Page 27 Handbook OPTIWAVE 7300 C 5. Loosen ground terminal screw (e) and insert wire. Retighten screw. See section 2.2.3: Power supply, Ex versions for earth connection (equipotential bonding system) for Ex-approved devices. 6. Check that the wires are held correctly by the terminals.

  • Page 28: Power Supply

    Handbook OPTIWAVE 7300 C 2.2 Power supply 2.2.1 General notes Each output requires its own power supply. Supply voltage outside of given limits Check that the device uses the correct power supply! A supply voltage above the maximum value can cause irreparable damage to the signal converter.
  • Page 29 Handbook OPTIWAVE 7300 C Network options There are 3 output versions: • current output HART®, passive, HART® protocol • current output Ex-ia HART® intrinsically safe; passive, HART® protocol • current output Ex-d ia HART® explosion-proof; passive, HART® protocol The last two versions are discussed in special manuals for devices approved for use in explosive atmospheres.
  • Page 30 Other means of network communication Each OPTIWAVE is supplied ex-factory with the appropriate DTM for PACTware. The latest version is available from the download centre on the KROHNE website. A user manual is supplied on a CD-ROM with the device.

  • Page 31: Commissioning

    Handbook OPTIWAVE 7300 C 3. Commissioning 3.1 Power-on and start-up Checkliste zur Inbetriebnahme Check the following points before power-on and start-up: • are all wetted components (antenna, flange and gaskets) sufficiently resistant to corrosion by the tank product? • does the information on the nameplate fixed to the signal converter conform to the operating data? •...

  • Page 32: Display Screen

    Handbook OPTIWAVE 7300 C 4.1.2 Display screen Screen layout The device has an optional 160 by 160 pixels, 9-line display. It has a 4-button pressure-sensitive keypad for selecting display functions and configuring the gauge. 1. RIGHT key 2. ENTER key 3.

  • Page 33: Normal Mode

    Handbook OPTIWAVE 7300 C 4.1.3 Normal mode Description The measurement data is displayed on the screen in this mode. Anybody can select what measurement information is displayed (level, volume and types of data) and how it is presented (display style).
  • Page 34 Handbook OPTIWAVE 7300 C Screens available for a device with one output OPTIWAVE 7300 C...

  • Page 35: Normal Mode Hot Keys

    Handbook OPTIWAVE 7300 C Special note: signal spectrum screen This shows a graph of discrete RADAR reflection values in decibels against distance following digital processing of the RADAR signal. The top 5 to 10 spectra (lines) will be displayed and the user can move to the next value to the right using the right button.

  • Page 36: Program Mode

    Handbook OPTIWAVE 7300 C 4.1.5 Program mode Description Using this mode, a user with the supervisor password can configure the device. Entering program mode 1. Press right button on the keypad for three seconds to enter program mode. 2. If the password function has been activated, the device will prompt the user to whether access is required to the supervisor or service menu items.
  • Page 37 Handbook OPTIWAVE 7300 C Menu navigation 1. Header bar - shows current menu level 2. Selection bar - indicates which menu item is selectedt * Press right and up keys simultaneously Functions Types of parameters Two types of parameters can be edited: •...
  • Page 38 Handbook OPTIWAVE 7300 C Editing values A value must be modified digit by digit. The cursor starts at its default position on the digit the furthest to the left on the edit screen. 1. Menu name 2. Function name 3. Parameter value with cursor on left digit 4.

  • Page 39: Program Mode Hot Keys

    Handbook OPTIWAVE 7300 C Returning to normal mode 1. Press escape several times to return to the Main Menu in program mode. 2. Press escape again to return to normal mode. If changes have been made to settings, the user will be prompted by the device to either save or cancel these changes.
  • Page 40 Handbook OPTIWAVE 7300 C Quick setup: setup modes Wizard-driven step-by-step procedures for easy and rapid device setup in standard applications. Online help is available when clarification is required. Using setup modes, the user can personalise different aspects of device operation. Setup modes available: •...
  • Page 41 Handbook OPTIWAVE 7300 C Complete setup mode Using the complete setup mode option, you can configure all the items in installation, empty spectrum, conversion and output setup modes. Installation setup mode For defining tank material, process connection, tank height and product state.
  • Page 42 Handbook OPTIWAVE 7300 C Empty spectrum setup mode For filtering out interference signals produced by fixed and moving obstacles in the tank. Conversion setup mode Using a conversion table created in this setup mode, you can display measurements with volume, mass or user defined units.
  • Page 43 Handbook OPTIWAVE 7300 C 1. Volume measurement of liquids OPTIWAVE 7300 C...
  • Page 44 Handbook OPTIWAVE 7300 C 2. Volume measurement of solids OPTIWAVE 7300 C...
  • Page 45 Handbook OPTIWAVE 7300 C 3. Mass measurement of liquids or solids OPTIWAVE 7300 C...
  • Page 46 Handbook OPTIWAVE 7300 C 4. Measurement using user-defined length and conversion units Horizontal cylindrical tanks type in "90°" under angle of inclination. Calibrate volume as for other tanks. No. of LVM entries This refers to the number of lines generated for typing in level and the equivalent conversion unit (volume...) in the volume/mass table.
  • Page 47 Handbook OPTIWAVE 7300 C Outputs setup mode For defining the measurement function and range, digital network address and signal on alarm. Displaying volume measurements Select a volume output function. OPTIWAVE 7300 C...
  • Page 48 Handbook OPTIWAVE 7300 C Advanced setup menu Using this menu, you can modify indivdual functions. These functions are grouped under: • Installation setup • I/O • Output 1 (HART) • Output 2 (Passive) • Device Setup • Reset Refer to section 4.2.3: Summary of user items for a description of advanced setup menu items.

  • Page 49: Summary Of Menu Items (Device Display Wizard)

    Handbook OPTIWAVE 7300 C 4.2.3 Summary of menu items (device display Wizard) Quick setup functions Function (Fct.) Input Range Description A.0.0.0 Quick Setup A.1.0.0 Setup mode Sets up the device for common applications using pre-defined steps. A.1.1.0 Complete N/a. As functions in Sets up the device using all the steps given advanced setup sub-menu.
  • Page 50 Handbook OPTIWAVE 7300 C Advanced setup functions Function (Fct.) Input Range Description C.0.0.0 Advanced setup This menu optimizes the configuration of the device. C.1.0.0 Installation setup This includes parameters for installation and application conditions. Also for defining conversion operations. C.1.1.0...
  • Page 51 Handbook OPTIWAVE 7300 C Function (Fct.) Input Range Description C.1.10.0 Reference offset -50 m or -164 ft to 50 m Offset relating to a reference location or 164 ft. 0 m or 0 ft (distance). This value is positive when the reference location is above the device flange face and negative if below.
  • Page 52 Handbook OPTIWAVE 7300 C Function (Fct.) Input Range Description C.1.19.1 Length unit m, cm, mm, inch, ft, Pick the length unit to be used in ft+inch+1/18inch, volume/mass conversion table from the ft+inch+1/32inch or free list. If free unit is selected, the unit given in unit.
  • Page 53 Tons, kg, US tons or GB Displayed mass unit in normal mode. tons. kg C.5.1.7 Customer length unit 9 characters max. Krohne Customer-defined length unit to be displayed. C.5.1.8 Customer length ratio 1 to 99999. 1 Enter the factor between C.5.1.4 Length unit selected and C.5.1.7 Customer length...

  • Page 54: Advanced Setup: Further Notes

    Handbook OPTIWAVE 7300 C Function (Fct.) Input Range Description C.5.2.3 Service 6 characters max.using Modifies the service password. To confirm kepad right(R), enter(E), the change, the new password must be down(D) or up (U). entered twice. C.6.0.0 Reset C.6.1.0 Factory Reset Confirm to reset.
  • Page 55 Handbook OPTIWAVE 7300 C Finding the advanced setup menu * Can be configured if "Storage+Stillwell", "Process+Stillwell" or "Agitator+Stillwell" is selected in Application Type menu item OPTIWAVE 7300 C...
  • Page 56 Handbook OPTIWAVE 7300 C How to protect your gauge settings Protect your settings by following this path to the Passwords menu Advanced Setup > Device Setup > Passwords Using this menu, you can • switch on or off restricted access to program mode for which a supervisor password is needed. If switched off, all users will be able to display device information and change quick setup and advanced setup settings.
  • Page 57 Handbook OPTIWAVE 7300 C Tank height function C.1.2.0 The height of the tank from the top of the tank process connection facing to the tank bottom. If not indicated in the order, this is set at the factory to probe length.
  • Page 58 Handbook OPTIWAVE 7300 C Level measurement As for distance measurement above, level is influenced by • tank height • blocking distance The reference point from which it is measured can be moved using • tank bottom offset Tank height function C.1.2.0 Level is derived from distance and tank height (tank height - distance).
  • Page 59 Handbook OPTIWAVE 7300 C Scaling the current output The current output setup mode is used to create current output scales for the first and second (if ordered) outputs that meet your requirements. You must define: 1. Output function function C.3.1.0 (output 1-level) function C.4.1.0 (output 2-other:volume)?
  • Page 60 Handbook OPTIWAVE 7300 C Notes: Level should be taken from the bottom of the device's measuring range (tank height). Concentrate points in areas where there are curved surfaces or abrupt changes in cross-sectional area (see example in the diagram and table below) - this will improve measurement accuracy.

  • Page 61: Error Messages And Troubleshooting (Device Display Wizard)

    Handbook OPTIWAVE 7300 C Product ε function C.1.14.0 For low dielectric constant products and when using TBF mode only. Type in an exact value for dielectric constant, ε If the product's dielectric constant is not known, then leave at the default value of 2. However, in this case expect reduced accuracy and/ or skipping of the measured value when the measuring mode switches over from TBF to direct mode (for example, if ε...
  • Page 62 Handbook OPTIWAVE 7300 C How to troubleshoot errors Go to menu item B.2.6.0 Error records in program mode to read find out which errors have been logged Program mode > Test > Error records 1. Scroll through the error list using the up and down buttons to select the error log you want. Five errors are listed per page –...
  • Page 63 Handbook OPTIWAVE 7300 C List of possible errors Two types of errors are logged: 1. Fatal (F): the measured value may not be correct. 2. Warning (W): the measured value is correct but may no longer be if the problem persists.
  • Page 64 Handbook OPTIWAVE 7300 C Error Message Type of Error Description Corrective action Peak And Spectrum Status Spectrum Quality bad The quality of the spectrum is Check tank installation and poor. Temporary display will not process. If necessary affect the performance of the contact the supplier.
  • Page 65 Handbook OPTIWAVE 7300 C Measurement quality Using menu item B.2.7.0 measurement quality, you can read more information about the last measurement. Six error/status messages are available and are listed below. Error Message Type of Error Description Corrective action Measuring Status Measurement Lost Temporary error message.

  • Page 66: Functional Checks

    Handbook OPTIWAVE 7300 C 5. Functional checks Using the device menu Program mode > Test, you can check the device outputs and perform common tests. You can display output values or assign test values in milliamperes to the outputs. In addition, internal test routines can be run.

  • Page 67: Service And Maintenance

    Refer to section 6.2. • modifying the antenna extension length. This must be done in atmospheric conditions and outside hazardous areas. Refer to section 6.3. Other repairs must be done by KROHNE-authorized service staff. 6.2 Signal converter replacement Procedure...

  • Page 68: Modifying Antenna Extension Length

    Handbook OPTIWAVE 7300 C 6.3 Modifying antenna extension length Modular DN 80 horn antennas may be lengthened or shortened by adding or removing antenna extension units. Dimensions in mm and inches An adjustable pin wrench for the part diameters given below is required for loosening and tightening the elements.
  • Page 69 Handbook OPTIWAVE 7300 C 3. Screw supplementary exension unit into the main housing assembly using the pin wrench. Repeat as necessary depending on the number of supplementary units required. 4. Lock the unit(s) in place with an M6 socket screw as shown. Tighten with a 3 mm or 1/8" allen (hexagonal) key.

  • Page 70: Technical Data

    Handbook OPTIWAVE 7300 C 7. Technical data 7.1 Technical data 7.1.1 Technical data extract Input Function: K-band FMCW radar Parameter: Level, distance, volume and reflectivity Min. tank height: 0.2 m / 8” Max. measuring range: 40 m / 131 ft...
  • Page 71 Handbook OPTIWAVE 7300 C Process Temperature Flange temperature: -40…+200°C/ -40…+390°F (Ex: refer to relevant device's approval and temperature class) Thermal shock 100°C/ min resistance: Pressure Operating pressure: -1…40 bar/ -14.5…580 psig; subject to process connection used and flange temperature Dielectric constant: >...

  • Page 72: Blocking Distance

    Handbook OPTIWAVE 7300 C 7.1.2 Blocking distance OPTIWAVE 7300 C radar level meter blocking distance* is defined as: antenna length + antenna extension (x number of units)** + 100 mm or 4" *measured from the flange facing or thread stop...

  • Page 73: Dimensions And Weights

    Handbook OPTIWAVE 7300 C 7.2 Dimensions and weights Level meter dimensions Dimensions in mm and inches Weights OPTIWAVE 7300 C...

  • Page 74: Measuring Principle

    Handbook OPTIWAVE 7300 C 8. Measuring principle 8.1 General principle A radar signal is emitted via an antenna, reflected on the product surface and received after a time t. The RADAR principle used is FMCW (Frequency Modulated Continuous Wave). Operating principle The FMCW-radar transmits a high frequency signal whose frequency increases linearly during the measurement phase (called the frequency sweep).

  • Page 75: Measuring Modes

    Handbook OPTIWAVE 7300 C FMCW radar digital signal processing 1. Sampling points 2. Voltage values 3. Fast Fourier Transform (discrete mathematical transformation) 4. Discrete voltage values over frequency (singular: spectrum, plural: spectra) 8.2 Measuring modes General OPTIWAVE can find the level using three measuring modes, depending on the dielectric constant of the product.
  • Page 76 The dielectric constant of the tank product must be known as exactly as possible. (This parameter can be determined by a KROHNE service technician from the recording of a tank filling or draining operation with the user program. The level in the tank should in this case change over the largest possible range.).

  • Page 77: Approvals

    Approvals for the CE-marking are standard. When ordered with the appropriate options, the device can be 9. Approvals approved for use in hazardous areas. All relevant approvals can be find in the KROHNE download center: www.krohne.com CE Declaration of Conformity OPTIWAVE 7300 C...

  • Page 78: Glossary Of Terms

    Handbook OPTIWAVE 7300 C 10. Glossary of terms Dielectric constant Also known as er, DK and relative permattivity. An electrical property that affects the amount of energy from a RADAR signal reflected off the product surface. Products have different values: water has an ε...

  • Page 79: Device Return Form

    We cannot service this device unless accompanied by such a certificate. This means that KROHNE can only service this device if it is accompanied by the following certificate confirming that the device is safe to handle.

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