Seismic Detectors Application Guide
Drill two 3.2mm Ø holes at least
6mm deep and then tap to M4
to secure the detector.
Use the GM7xx drill template (supplied with the detector) to correctly locate the drill holes for the
GM7xx detector and for the GMXS1 test transmitter.
Figure 3-2: Gm7xx drill template on flat steel
3.4 Detector installation on steel using the GMXP0 mounting plate
The GMXP0 mounting plate must be used if the steel surface is uneven or the steel is reinforced. The
mounting plate can be welded or screwed to the protected surface. It is important to ensure that the
correct side is selected for the installation of the detector on to a steel surface.
GMXP0 mounting plate (weld side)
Figure 3-3: GMXP0 mounting plate
The weld symbol should be visible when weld fixing the GMXP0 mounting plate to
a steel surface.
Remove all paint or grease from the steel surface to ensure that the rear of the GMXP0 has
the optimum metal to metal contact between the mounting plate and the protected surface.
3.4.1 Weld fixing
Vanderbilt recommend weld fixing the GMXP0 mounting plate directly on to the clean, paint-free area
of the protected surface. This option provides the best acoustic coupling for the detection of vibration
signals.
Ensure that the correct side of the mounting plate is selected for the type of fixing to the protected sur-
face.
Drill one 3.2mm Ø hole at least
6mm deep and then tap to M4 to
secure the GMXS1 test transmitter
if required.
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