Force measurement technology by GTE

GTE Industrieelektronik GmbH
Helmholtzstr. 21, 38-40
41747 Viersen, GERMANY
+49 (0)2162 - 3703 - 0

Measurement


When it comes to force testing it is reasonable to distinguish between two cases:

Standard Test Series

As defined in BS EN 12453 manufacturers of power operated door and gate systems need to measure opening and closing forces to ensure proper force limitation.

The EN describes a complex measuring series of 9 test points with 3 single measurements to be taken at each point. The average force and time parameters of each point of measuring are then compared with admissible limiting values, which are given in the standard as well.

Test points are defined for the following gate types:

Sliding gates

Sliding gates need to be measured…

  • …50 mm above the lower edge of the leaf;
  • …in the vertical centre of the closing edge;
  • …300 mm below the upper edge of the leaf.

If the height of the leaf exceeds 2800 mm the test heights are…

  • …50 mm above the lower edge of the leaf;
  • …2500 mm above the lower edge of the leaf;
  • …300 mm below the upper edge (Only if the height of the leaf is lower than 5000 mm).

Measurements need to be performed in opening gaps of…

  • …50 mm;
  • …300 mm;
  • …500 mm.

Swing gates

Hinged swing gates need to be measured…

  • …50 mm above the lower edge of the leaf;
  • …in the vertical centre of the closing edge;
  • …300 mm below the upper edge of the leaf.

If the height of the leaf exceeds 2800 mm the test heights are…

  • …50 mm above the lower edge of the leaf;
  • …2500 mm above the lower edge of the leaf;
  • …300 mm below the upper edge (Only if the height of the leaf is lower than 5000 mm).

Measurements need to be performed in opening gaps of…

  • …50 mm;
  • …300 mm;
  • …500 mm.

These test points also apply to folding gates.

Vertically moving doors

Vertically moving doors need to be measured…

  • …200 mm from the left frame;
  • …at the horizontal centre of the closing edge;
  • …200 mm from the right frame.

Measurements need to be performed in opening gaps of…

  • …50 mm;
  • …300 mm;
  • …2500 mm.

If the height of the leaf is lower than 2800 mm the test heights are…

  • …50 mm;
  • …300 mm;
  • …300 mm below the fully open position.


Secondary / Rear edges

If there are potential crushing, shearing or entrapment hazards between secondary edges and hard parts of the surroundings, the force limitation capabilities of the system shall be tested as well.

Documentation

The documentation of a standard test series should contain the following information:

  • general information about the door/gate configuration
  • date of the measurement
  • type and calibration date of the force tester
  • all single result parameters
  • average values for each measuring point
  • the force versus time diagrams
  • the averaged force versus time diagrams


How the results of your standard test series can be documented, please find out in our section “KMG Force Testers“.

Quick Force Test

When it comes to annual maintenance of power operated door/gate systems experience has shown that the time-consuming standard test procedure is unnecessarily complex for assuring sufficient force limitation capabilities. The complexity as well as the increasing costs might cause that no force measuring is done after all.

As a compromise, GTE recommends a ‚quick force test‘ which is less time-consuming, but provides a reliable and reproducible way of assessing the reversing process of a door/gate system. GTE suggests that three measuring points are chosen to provide direct comparison to the standard limiting values (without averaging).

 

The following video clips show examples of a quick force test on an automatic sectional door and a power operated sliding gate.

Documentation

The documentation of a quick force test should contain the following information:

  • reference to the door / gate
  • date of the measurement
  • name of the tester
  • all resultant parameters
  • remarks, if force is out of admissible range
  • signature of the tester

How the results of your quick force test can be documented, please find out in our section “KMG Force Testers“.