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5.3. VMID Measurement Point
5.3.1. How the VMID Measurement Point Functions
The PCE-VM 25 is equipped with an electronic measuring point detector. Metra offers a type VMID measurement point, which is made of magnetic stainless steel and
has aninbuilt memory with an individual serial number.
The serial number stored inside the measurement point is a unique 16-digit hexadecimal number, e.g. “000000FBC52B”.
Figure 17: VMID Measuring point
Each measurand can be easily and reliably allocated to a specific measuring point. To read the serial number, contact is made through the sensor‘s magnetic base.
The maximum permissible operating temperature for the VMID is 80 °C.
5.3.2. Mounting the VMID Measurement Point
A VMID measurement point is mounted onto the machine using two component epoxy adhesive. For an accurate vibration transmission, Metra recommends the
following adhesive:
• LOCTITE Hysol 3430 without filler for even surfaces
• LOCTITE Hysol 3450 with filler for uneven surfaces
Before applying the adhesive ensure that all residues of grease have been thoroughly removed from both contact surfaces. The two component adhesive can be
applied directly onto the chosen surface. The adhesive takes 5 minutes to harden and after 15 minutes the first measurement can be taken.
6. Measurement
6.1. Measurement Value Display
In the top margin of the screen (Figure 18) the battery power is displayed. Next to this the date and time are also indicated.
Figure 18: Measurement display
Below the measurand (v: 10 Hz-1 kHz RMS) the currently measured value. The display “No Point ID” indicates that
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