Technical data are subject to change without notice.
© Copyright SPM 2002-04. 71650.B
SPM Instrument AB • Box 504 • S-645 25 Strängnäs • Sweden
Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.se
Machine unit A
Machine unit
B
Machine units and measuring rounds
The object of condition monitoring should always be the whole machine unit, i. e. the driving and
the driven part as well as the transmission, if any. If for example the equipment consist of a number
of motors and pumps, register a component (or prepare a separate follow-up form) for each
motor-pump unit. One reason for this is that poor shaft alignment normally affects the bearings on
both sides of the coupling, and is easily recognized when the readings for bearings 2 and 3 are
recorded on the same form.
The exception are very large machines, such as paper machines, where the bearings on the drive
end of a section's cylinders are usually treated as one unit, and the bearings on the non-drive end
as another.
Names and numbers
Use a consistent naming and numbering system to make it easy to recognize the machine unit and
the measuring points on follow-up forms and check lists. With Condmaster
®
Pro, you can create a
tree structure that helps you to find the information in your data base.
Common practice is to start measuring point numbering at the fan end of the motor (1) and
continue along the line of power transmission.
Plan measuring rounds
A catalogue of plant machinery, floor plans, and machine drawings are useful planning aids. Select
the machines which are important for production and safety. Divide the machines you want to
monitor into groups which can be measured on one occasion. Find out the shortest route between
measuring points.
A check list of the machines to be measured on one measuring round is easier to carry than a folder
of follow-up forms. The check list should have space for one reading per measuring point and for
notes. With Condmaster
®
Pro, you can choose between several such lists, or create your own.
Point 1: Motor N (non-drive end)
Point 2: Motor D (drive end)
Point 3: Pump D
Point 4: Pump N
30 General remarks on SPM measurement
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