Filling DRS511 installation slot with cold filling material - RWS200

RWS200 Installation Manual
Product status
Document code
M211608EN
Revision
AA
ft:locale
en-US
Product
RWS200
Document type
User guide
To create a constant thermal compatibility around each sensor, the block must be consistent. The space around the sensor allows free flow of grout to envelope the sensor without air bubbles. An oversize hole or too much grout around the sensor weaken the bond and stability.
DRS511 positioning (cold filling material)
1
Epoxy/Polyester grout
2
Putty
  1. (Only if allowed by local guidelines) To protect the cable, insert a string of foam at the bottom of the cable slot.

    Check that the DTS12G sensor is not covered.

  2. Uncoil the sensor cables and place them in the slot.

    Check that the DTS12G sensor is not covered.

  3. (Only if allowed by local guidelines) To protect the cable, insert another string of foam on top of the sensor cable.
  4. Insert the putty to the bottom of the slot.
    1. Take a generous lump of hard-setting putty (approximately ⅓ of the size of DRS511) and roll this in your hands until it becomes soft.
    2. Shape the piece into a cone and place it at the bottom of the slot.
    3. Leave the piece to harden for a few minutes.
    4. Insert the sensor on top of the putty and, in a see-saw motion, rock the sensor until the top of the sensor lies 1 to 3 mm (0.04 to 0.12 in) below the road or runway surface.
  5. Push the sensor cable carefully along the base of the slot.
  6. Verify with a spirit level that the sensor is in horizontal position and that no side is more than 3 mm (0.12 in) below the surface.
  7. Place the measured grout mix in a suitable container and mix properly.

    Consult the grout manufacturer specifications for the suitable hardener/resin mixing ratio. The final texture of the grout should be pourable, but not flowing.

  8. Check the sensor positioning again.
  9. Pour the grout around the sensor head and along the length of the slot to the surface.

    Use the trowel to move the grout in and around the slot. Overfill the slot to ensure that there are no cracks between the hole and the road pavement.

    1
    Epoxy/Polyester grout
    2
    Putty
  10. Make sure that the filling in the hole around the sensor is slanted towards the sensor so that moisture is able to accumulate on top of the sensor.

    This is needed for determining salt concentration.

  11. Allow to cure.

    The cure time depends on the air temperature as well as the filling material used. As the final curing takes place, use a wire brush to remove any excess filling material from around the sensor head as well as to roughen the surface. This will best reflect the surface tension of the surrounding road or runway.