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Monitran launches the versatile VS0004 Vibration Switch Module
MAINTEC 2008, NEC, Birmingham - 11th March 2008 - Monitran, a world leader in the development and manufacture of sensors for the measurement
of vibration and displacement, has launched the VS0004, a complete condition monitoring and alarm module.
Fixed to a piece of plant machinery, the VS0004 can respond to a rise in
vibration levels in a number of user-definable ways. The unit has two
alarm levels, with the user able to set Alarm 1 between 1 and 50mm/s and
with Alarm 2 capable of being set as a multiple of Alarm 1, either 1.5,
2, 3 or 5x.
Bob Pickard, Monitran's Technical Director, comments: "One option users
have is to use Alarm Level 1 to sound an alarm and use Alarm Level 2,
with its higher limits, to shut down equipment."
Also, the unit has a 4-20mA output scaled to Alarm 2, and so can be
interfaced with PLCs or other control circuitry.
The VS0004 contains a double-pole double-throw relay for each Alarm
Level, and the user effectively wires to the normally open (NO) or
normally closed (NC) contacts depending on what action is to be taken
when an alarm limit is reached. The switching capability of each relay
is 8A at 240V AC or 30V DC.
The switch module also features a 10 second Alarm ON time constant and a
30 second start-up delay. Pickard continues: "The start-up delay is of
particular benefit if the unit is attached to machinery which naturally
shakes during power-up. Without the delay, you'd be faced with either
accepting a few false alarms or setting your Alarm Levels higher."
The VS0004 is available with latching or non-latching indicators.
Pickard adds: "Latching means the unit's Alarm Level LEDs will remain
illuminated even after vibration levels have fallen below their
corresponding limits. This is particularly useful as, under certain
circumstances, you may not otherwise be aware that alarm or shutdown
conditions had been reached." A reset button is present on the indicator
latching version of the VS0004.
Sealed in a die-cast aluminium enclosure, the VS0004 weighs
approximately 0.8kg and measures 80 x 125 x 82mm (depth, width and
height, including connectors, respectively). Its frequency response is
5Hz to 1kHz and its operational temperature range is -10 to 85oC.
Pickard concludes: "Whilst there are many vibration switches on the
market, few if any offer comparable versatility, or represent such good
value for money when one considers that this unit could be used to
protect thousands of pounds worth of equipment - to say nothing of
sparing a factory the horrific costs associated with unscheduled line or
plant shutdowns."
The VS0004 is available immediately and is a fit-for-purpose replacement
for its predecessor, Monitran's popular VS0003, and it is worth noting
that the VS0004 will be retailing for less than the VS0003.
Optional extras include an external accelerometer and Alarm Latch.
