![background image](http://html1.mh-extra.com/html/mmf/vm25/vm25_instruction-manual_1813941022.webp)
ber and its assigned text are also displayed. The RMS and peak value are displayed
underneath the date, time, display mode and filter type. (Figure 25).
Press ▼▲ to scroll to the next measurand. The currently displayed measurands can
be deleted by pressing F1. Press F3 to exit the menu.
The VM25 memory can hold 16000 measurement values.
6.7. Deleting Saved Measurement Data
In the menu option “Measurement data” / “Erase meas. data Memory” you can
delete the entire measurement data. After pressing OK a warning message will ap-
pear showing the total number of records.
6.8. K(t) Measurement
The basics of rolling bearing parameters K(t) can be found in section 3.5
First, use keys ◄► to select the operation mode “Roll. bearing” (Figure 26).
K(t) measurements are only intended for use in conjunction with a VMID measure-
ment point. The start / reference values RMS and peak of values which have been
measured on the new rolling bearings are required for calculating K(t). These start
values are saved in the VM25 together with the measuring point ID.
Place the sensor on a VMID measuring point of the relevant bearing. If the VMID
measurement point ID has not yet been saved in the VM25 (Figure 27), then first of
all enter the ID name by pressing the ▼ key (cf. Section 6.3.2).
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Figure 25: Display of saved measurements
Figure 26: VM25 in K(t) mode without VMID