SPM T30 - Input Data

Technical data are subject to change without notice.
© Copyright SPM 2002-04. 71650.B
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SPM
TLT 20
dBm 16
dBc 9 dBi 26
Input data
For shock pulse measurement, you go to the SPM menu (A) with RIGHT/LEFT. The SET key takes
you to the display of the basic data for the bearing (B).
For a normalized reading of bearing condition with a T30, you need the initial value dBi. Given the
rotational speed (rpm) and the shaft diameter d, the T30 will calculate and display the dBi. The
figure under (B) shows the setting when you input the rpm and the shaft diameter (here in mm). If
you change the dBi directly, which is faster when you know it from your records, you see the
display shown under (C).
For unnormalized readings, you scroll the dBi down past -9 to ”--”, as shown under (D). You will
then measure in dBsv (absolute shock values) and get no condition indication.
To change the setting, you step to the line with SET. RIGHT/LEFT moves the cursor to individual
numbers, UP/DOWN scrolls the number and toggles TLT on/off. SET brings you to the next line,
and ENT back to the SPM menu.
When TLT test is on, the instrument will display the result of a transducer line test on the display for
data input, so you can check the quality of signal transmission between transducer and instrument.
This is used when you measure with permanently installed transducers. Values below 15 are not
acceptable and you have to check cables and connectors for bad connections and moisture. When
values deteriorate from a previously higher level you should also check the tranducer line.
Bearing data
TLT On
3000 rpm
90 dmm dBi 26
B: Basic data
A: dBm/dBc display
SET
SET
Go to line
Go to position
Change value
ENT
Bearing data
TLT On
----- rpm
--- dmm dBi 26
C: Direct input of dBi
Bearing data
TLT On
----- rpm
--- dmm dBi --
D: Unnormalized (no dBi)
20 SPM measurement