Metrix 440 - Control Settings

Doc# 90018-031 • REV L (April 2016) Page 10 of 16
6. CONTROL SETTINGS
6.1 SengTripPoints
The Model 440DR provides two setpoints: one for alarm and one for shutdown.
The rst alarm is normally set at a vibraon alarm level to provide early warning that the
condion of the machine is deteriorang. If the machine condion connues to deteriorate,
the shutdown setpoint provides protecon against catastrophic failure. The shutdown and
alarm setpoints are set directly in inches/seconds or mm/sec.
The Warning Level Guide below indicates recommended starng points for vibraon warning
levels, dened as levels at which abnormal wear is occurring. Vibraon analysis by compe-
tent machinery diagnosc personnel is recommended when a warning alarm level has been
reached. Dierent warning levels are given for dierent types of machinery.
NOTE: SR models provide only
one setpoint (shutdown).
NOTE: The ranges below are typical. Each machine
will have its own acceptable levels of vibraon,
depending on how it is loaded, the parcular instal-
laon, and the tolerances of the machine itself. The chart
below is a guideline and does relieve the user of respon-
sibility for determining their own acceptable alarm and
shutdown levels for the equipment at hand.
WarningLevelGuide
6.2 SengofTimeDelay
An important feature of Model 440/450 switches is the built-in me delay. This prevents
triggering of the alarm or shutdown funcons from transient increases in vibraon levels. It
also avoids shutdown due to transitory vibraons occurring during start-up.
The me delay is adjustable. The factory default seng is three (3) seconds unless specied
otherwise.