Metrix 5550 User Manual

Doc# 1231558 • REV C (November 2017) Page 4 of 20
FIGURE 4: Side views showing horizontal and vercal orientaons of 5550 switch
NOTE: Depending on how the setpoint is adjusted, sim-
ply turning the switch on its side or upside down may be
sucient to cause it to trip, due to the eects of gravity.
1.3.3 Variable #3 – Vibraon Forces Acng on the Switch
By shaking or impacng the switch along its sensive axis with sucient ineral force for
a sucient duraon and within its frequency response range, the trip plate mechanism
will overcome the combined forces of gravity (depending on orientaon) and spring ten-
sion, snapping from its untripped posion to its tripped posion.
2. INSTALLATION
the spring force will govern the trip plate’s behavior. With the switch oriented vercally
up (Figure 4B), gravity acts to keep the trip plate’s movable mass in the untripped posion,
and ineral excitaon must counteract both gravity and the spring force. With the switch
oriented vercally down (Figure 4C), gravity acts in the opposite direcon and opposes the
spring’s force. Thus, with the same setpoint adjustment, a switch facing up will require the
most excitaon to trip, a switch facing horizontally will require 1g less excitaon to trip, and
a switch facing down will require 2g less excitaon to trip.
WARNING: Before proceeding to wire and install model 5550 and 5550G switch-
es, read and thoroughly understand these instrucons. They are intended for
experienced personnel who require only basic installaon guidance, and assume
that the switch has already been selected and applied properly for the machinery at hand.
When installing the switches in hazardous atmospheres, refer to Metrix manuals M8905
(5550) and 100356 (5550G) for important safety informaon. All of these manuals, as
well as addional technical resources, are available on our website at www.metrixvibra-
on.com. You may also contact Metrix or its local representave for addional assistance,
using the informaon on the last page of this manual.
GRAVITY
SENSITIVE
AXIS
GRAVITY
SENSITIVE
AXIS
GRAVITY
SENSITIVE
AXIS
4A: Horizontal orientaon,
cover facing right
4B: Vercal orientaon,
cover facing up
4C: Vercal orientaon,
cover facing down

Metrix 5550 Specifications

General

Brand	Metrix
Model	5550
Category	Switch
Language	English