If the sensor locates a VMID measuring point which is already saved in the VM25
memory, in order to prevent unintentional switch-over, a warning signal will be dis-
played when the measurand changes (Figure 19). By pressing OK the measuring
range can still be changed. The warning signal will not appear again until the next
measuring point is detected .
6.3. Measurement Point Detection
6.3.1. Reading the VMID Data with the VM25
The VMID measurement points are designed, so that the magnetic sensor base cen-
ters itself. To avoid mechanical shock do not let the sensor snap onto the measure -
ment point, instead, roll it slowly over the edge. To improve the vibration transmis-
sion the measuring point can be lightly lubricated.
As soon as the Sensor base comes into contact with the measurement point, the
VM25 displays the measurement point number (Point ID) (Figure 20).
6.3.2. Entering the Measurement Point Text
If a measurement point has not yet been assigned a text, press the▼ key to reach the
text edit menu (Figures 20 and 21).
A space of two rows consisting of 10 characters each is assigned for each measure -
ment point text. The text is entered using keys ▼▲. By pressing keys ◄► you can
change the character position. Both capital letters (A to Z) and numbers (0 to 9) are
available. To move down to the next row press F1. By pressing F1 again and using
keys▼▲ the operation mode can be selected.
16
Figure 20: Newly recognized VMID
Figure 19: Warning at mode change