Meggitt VM600 Hardware Manual

VM600 MPS hardware manual (standard version) MAMPS-HW/E 7 - 23
Edition 17 - February 2018
Absolute housing expansion
PROCESSING MODES AND APPLICATIONS
7.10Absolute housing expansion
(1) Description
All thermal machines are subject to absolute expansion due to variations in their temperature.
The measurement of this parameter is performed on the machine at one or two critical points
on the housing using an absolute expansion probe, such as the AE119 (measuring range up
to 50 or 100 mm) from Meggitt Sensing Systems’ Vibro-Meter product line. The body of this
probe is attached to a fixed reference and its measuring element makes physical contact with
the machine housing.
In Figure 7-19 below, two probes are used to measure two different (independent) machine
bodies, for example, the HP and LP turbine housings. The MPC4 is set up for single channel
processing. One MPC4 channel is required for each probe.
Figure 7-20 shows the processing performed for a single AE119 housing expansion probe.
Figure 7-19: Measuring the absolute housing expansion on two different bodies
To monitoring electronics
(Channel 1)
HP turbine
housing
LP turbine
housing
AE119
housing expansion probe
To monitoring electronics
(Channel 2)

Meggitt VM600 Specifications

General

Brand	Meggitt
Model	VM600
Category	Measuring Instruments
Language	English