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Introduction
There's nothing stripped down or bare bones about these loop-powered
indicators; they're designed for demanding process control
applications. Standard features include a full 5-digit backlit
display with bargraph, on-screen custom engineering units,
and max/min display capabilities. There are two models available:
the PD683 is for general-purpose applications and the PD688
is for hazardous area applications.
Even with all the features packed into these meters, they're
still easy to setup and get running. Everything is programmed
from the front panel buttons with no pots or jumpers to deal
with. In fact, these indicators can be scaled without a signal
source for even quicker setup.
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The PD683 and PD688 go just about anywhere with their shallow-depth
case, FM Type 4X front, loop-powered backlighting, and wide
operating temperature range. It doesn't matter if they're
indoors or outdoors, in bright sunlight, or a dimly lit plant,
wet, dirty, hot or cold. And the PD688, with its FM approval
and CSA certification, can be installed in just about any
hazardous area environment.
Square root and programmable exponent functions are standard
features on the PD683 and PD688. With these features these
indicators can display flow from a DP transmitter or open
channel flow in weirs and flumes.
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