1. Introduction

To give the best performance, KROHNE level meters must be installed in a correct way. Important instructions should be taken into consideration, like the mounting position, shape of the tank, obstacles within the tank, etc. Depending on the measuring principle of each device, the guidelines will differ. In this article we will explain the installation instructions for Non Contact Radar Level meters for solid measurements (OPTIWAVE 6x00).


The article cover the following topics:

  • OPTIWAVE 6300 
  • OPTIWAVE 6400 
  • OPTIWAVE 6500


2. OPTIWAVE 6300

Mount the device like showing in the below picture where:

  1. Position of the process fitting from the silo wall, r/2 (for DN80, DN100, DN150 or DN200 horn antennas, and DN80 or DN150 Drop antennas).
  2. Radius of the silo, r.
  3. The minimum measured level for a device without a 2° slanted PP flange option. 
  4. The minimum measured level for a device with a 2° slanted PP flange option.


  • Do not put the device near to the product inlet. If the product that enters the silo touches the antenna, the device will measure incorrectly. If the product fills the silo directly below the antenna, the device will also measure incorrectly.

       

  • If it is necessary to measure to the bottom of the silo, a 2° slanted PP flange option is available for all antennas.
  • If possible, do not install a nozzle on the silo centerline.
  • Do not install the device above objects in the silo (ladder, supports etc.). Objects in the silo can cause parasite radar signals. If there are parasite radar signals, the device will not measure correctly.
  • If it is not possible to install the device on another part of the silo, do an empty spectrum scan.


3. OPTIWAVE 6400

Mount the device like showing in the below picture where:

  1. Position of the process fitting from the silo wall, r/2 (for DN80, DN100, DN150 or DN200 horn antennas, and DN80,DN100 or DN150 Drop antennas).
  2. Radius of the silo, r.
  3. The minimum measured level for a device without a 2° slanted PP flange option.
  4. The minimum measured level for a device with a 2° slanted PP flange option.

  • If there is a nozzle on the tank before installation, the nozzle must be a minimum of 200 mm /7.9¨ from the tank wall. The tank wall must be flat and there must not be obstacles adjacent to the nozzle or on the tank wall.
  • Point the device in the correct direction to get the best performance, where:
    1.  Cable entry.
    2. Nearest tank wall.
    3. tank center line.

  • There is no maximum limit to the number of devices that can be operated in the same silo. They can be installed adjacent to other radar level transmitters.
  • Dish-shaped or conical bottoms have an effect on the measuring range, the device cannot measure to the bottom of the tank. If possible, install the device as shown in the illustration that follows:

  • Do not install the device above objects in the silo (ladder, supports etc.) or pit. Objects in the siloor pit can cause interference signals. If there are interference signals, the device will not measure correctly.
  • If it is not possible to install the device on another part of the silo or pit, do an empty spectrum scan.
  • Do not put the device immediately above equipment and obstacles in a silo or pit. This can have an effect on the performance of the device.
  • To prevent measurement of interference signals avoid the following:
    1. Do not tilt the device more than 2°.
    2. We recommend that you do an empty spectrum recording if there are too many obstacles in the radar beam (for more data,
    3.  Beam radius of the antenna: refer to the table below. The beam radius increases by increments of "x" mm for each metre of distance from the antenna.


4. OPTIWAVE 6500

Mount the device like showing in the below picture where:

  1. Position of the process fitting from the silo wall, r/2 (for the DN40 or DN70 Lens antenna).
  2. Radius of the silo, r.
  3. The minimum measured level for a device without a 2° slanted PP flange option.
  4. The minimum measured level for a device with a 2° slanted PP flange option.


  • If there is a nozzle on the tank before installation, the nozzle must be a minimum of 200 mm /7.9¨ from the tank wall. The tank wall must be flat and there must not be obstacles adjacent to the nozzle or on the tank wall.
  • Point the device in the correct direction to get the best performance, where:
    1.  Cable entry.
    2. Nearest tank wall.
    3. tank center line.
  • There is no maximum limit to the number of devices that can be operated in the same silo. They can be installed adjacent to other radar level transmitters.

  • Dish-shaped or conical bottoms have an effect on the measuring range, the device cannot measure to the bottom of the tank. If possible, install the device as shown in the illustration that follows:

  • Do not install the device above objects in the silo (ladder, supports etc.) or pit. Objects in the silo or pit can cause interference signals. If there are interference signals, the device will not measure correctly.

  • If it is not possible to install the device on another part of the silo or pit, do an empty spectrum scan.

  • Do not put the device immediately above equipment and obstacles in a silo or pit. This can have an effect on the performance of the device.
  • To prevent measurement of interference signals avoid the following:
    1. Do not tilt the device more than 2°.
    2. We recommend that you do an empty spectrum recording if there are too many obstacles in the radar beam (for more data,
    3.  Beam radius of the antenna: refer to the table below. The beam radius increases by increments of "x" mm for each metre of distance from the antenna.