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5.1
TROUBLESHOOTING
Vibraswitches do not normally require any maintenance or repair, however, listed below are some of the possible mal-
functions that may occur and their recommended solutions (Ref. Figure 4-1). Perform all tests with field wiring discon-
nected.
a. Functional Test - (Ref. Figure 4-1)
1. With the Vibraswitch cover removed, place Vibraswitch on a table with its mounting surface down.
2. Press reset button. If switch does not reset (armature latched on stop pin), turn set point adjustment screw CCW
until switch can be manually reset.
3. Slowly turn set point adjustment screw CW until switch trips. This is the zero trip point which is the amount of
spring tension required to overcome the 1 g force exerted by the earth's gravitational pull.
4. Note set point setting. One complete turn equals approximately 1 g. Set point scale is marked in 0.1 g incre-
ments. Turn set point adjustment screw 1 complete turn CCW. This is a 1 g setting above the earth's gravitational
pull.
5. Manually reset the switch (press reset button).
6. With the reset button to your right and the set point adjustment screw to your left, slowly rotate the Vibraswitch
toward you 90°. The switch will trip when the mounting surface is in a vertical plane and the earth's gravitational
pull is not aiding the lower magnet to hold the armature against the stop pin.
b. Vibraswitch Will Not Reset
1. Dirt and/or iron metal chips on magnets.
clean magnets.
2. Broken leaf spring - (Ref. Figure 4-1).
Return the Vibraswitch to the factory for repair.
3. Open reset coil.
Check for continuity or proper coil resistance (Ref. Table 5-1).
Nominal Voltage
(Diode prevents actual resistance reading)
MAINTENANCE
TABLE 5-1 Coil Resistance
24 VDC
48 VDC
120 VDC
120 VAC
240 VAC
SECTION V
Resistance (Ohms ± 10%)
50
230
840
Check for continuity
Check for continuity
Page 17
909GF299
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