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Description
The Ultra SlimPak II is an exciting
new line of isolating signal
conditioners from Action Instruments
with greater accuracy and better
stability than virtually any
other signal conditioners on
the market today.
The
WV128 is a Thermocouple Input
Limit Alarm with dual setpoints
and two contact closure outputs.
The input type and alarm functions
are field configurable, offering
maximum flexibil- ity. There
are seven thermocouple types
(B, E, J, K, R, S and T) from
which to choose. Alarm setpoints
are fully adjustable throughout
the entire range.
The
WV128-2000 contains two standard
non-latching SPDT relays. When
power is removed, the relays
revert to their non-powered
state. The WV128-2001 contains
two latching relays. Whatever
position the relays are in when
power is removed is where they
will remain when power is re-applied
(a reset switch is provided
to reset the relays after the
alarm is no longer true). Both
models are configurable as a
single or dual setpoint alarm,
with HI or LO trips. The WV128-2000
supports failsafe or non-failsafe
operation. In failsafe operation
the relay coil is energized
when the process is below the
HI setpoint or above the LO
setpoint (opposite for non-
failsafe). In the failsafe mode,
a power failure results in an
alarm state output.
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Operation
Each of the alarm setpoints
has a respective HI or LO deadband.
Red LEDs will illuminate indicating
an alarm condition. The trip
will reset only when the process
falls below the HI deadband
or rises above the LO deadband.
(The WV128-2001 requires pressing
the reset switch in order to
reset the relays after being
tripped.) The deadband can be
left at the minimum level (the
factory default) or can be set
to whatever level is desired.
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