HID Lumidigm M Series Mechanical Integration Manual page 11

Lumidigm M-Series M3xx Modules Mechanical Integration Guide, PLT-02217, Rev. A.0
It is strongly suggested that the customer mechanical design be completed in a way such
that the capture features used to secure the M3xx sensor head to the enclosure have
positive stop features so that the pressure set can be reliably achieved without careful
control of retaining screw torque. An example capture mechanism is shown in Figure 8.
Figure 8: Example customer mounting
The arrangement in Figure 8 consists of 1) a clip attached to the M3xx sensor head, mating
with its exterior features and 2) screws securing this clip to an example customer enclosure
where positive stop features on the enclosure terminate compression of the sensor head
when the clip and the enclosure are in contact. The dimensions, tolerances, and selection of
gasket material sealing the M3xx sensor platen area against the enclosure are critical
elements of the enclosure design.
Alternatively, a cup shape capturing the bottom of the sensor head and providing
mounting holes and features could be used in place of the clip-style approach shown in
Figure 8.
Page 11 of 28 December 2014