21
Technical data are subject to change without notice.
ISO 9001 certified. © Copyright SPM 1996-9. 71411.B
SPM Instrument AB • Box 4 • S-645 21 Strängnäs • Sweden
Tel +46 152 22500 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.se
Shock Pulse Measurement
Normalized shock pulse readings show bearing condi-
tion. They require the input of the basic bearing data,
i.e. the bearing's NORM No. (10 to 58) and its TYPE
No. (1 to 8). TYPE No. for the various types of rolling
bearings are shown on page 23. The lowest NORM
No. for all types is 10. When the probe transducer is
used, the lowest acceptable NORM No. is 18.
For unnormalized readings, the NORM No. is set to 0.
The result of an unnormalized reading is LR and HR
value only (not CODE, LUB, and COND, and no arrow
displayed against the condition scale).
Compensation
The COMP No. is used to calibrate the measuring
point. It is normally set to 0. If, however, you suspect
signal losses, set a COMP. No. (see page 25).
Accumulation
The digit behind Acc (see fig. 2) sets the number of
consecutive measuring cycles. The maximum number
of cycles is 9. If the reading consists of more than one
measuring cycle, the A2010 displays and evaluates an
arithmetic average of the measured LR/HR values.
At least 3 measuring cycles are needed for bearings
with NORM Nos. below 30. As a rule, the lower the
rpm of the bearing, the more measuring cycles are
needed to obtain a reliable measuring result.
Setting Bearing Data
Switch on the A2010 and select the SPM mode. Press
the SET key to obtain the menu shown in figure 2A.
Bearing data are set as follows:
• The cursor, a blinking dark square, shows the
number that can be changed, starting with the
NORM No.
• Pressing and holding down the UP key increases
the number at the cursor position. The DOWN
key decrease the number.
• The SET key moves the cursor to the next item on
the menu.
• The M key is used to leave the set mode after all
data are correct.
Changing Data, Example
In the example shown in figure 2, you have to change
the NORM No., the TYPE No., and the number of
accumulated measuring cycles.
With the menu shown in figure 2A on the screen:
• Press and hold down the UP key until the NORM
No. reads 28. Press the SET key once.
• Press and hold down the UP key until the TYPE
No. reads 5. Press the SET key twice.
• Press and hold down the UP key until Acc reads
3. Press the M key once.
On leaving the SET mode with the M key, the display
changes to the last SPM measuring results. Pressing
the M key again will start a new reading, using the
new basic bearing data.
BEARING DATA
NORM 0 Acc 1
TYPE 1
COMP 0
Fig. 2
BEARING DATA
NORM 28 Acc 3
TYPE 5
COMP 0
A Menu before changing data
B Menu with complete data
To Next Page
Loading...
