modeL pd683 & pd688 Loop-powered paneL meters
2
keY FeatUres
Through significant innovation in technology and design, we
developed the Loop Leader™ Series of loop-powered indicators,
which are loaded with standard features and built for tough
industrial environments.
Full Featured
There’s nothing stripped down or bare bones about these 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
Install Just About Anywhere
Indoors, outdoors, bright sunlight, dimly lit plant, wet, dirty, hot
or cold- these indicators go just about anywhere. Their shallow-
depth case, FM Type 4X front, loop-powered backlighting, and
wide operating temperature range are all standard features. And
the PD688 with its FM Approval and CSA Certification can be
installed in just about any hazardous location.
4-20 mA Input Connections
S+ S- B+ B-
4-20 mA
Transmitter
Power
Supply
S+ S- B+ B-
4-20 mA
Transmitter
Power
Supply
Wiring with Backlight
Wiring without Backlight
Square Root Function
The square root extraction feature displays flow rate by extracting
the square root from a differential pressure transmitter signal.
The user selectable low-flow cutoff feature gives a reading of
zero when the flow rate drops below a user selectable value.
Displays Flow Rate
User Selectable Low-Flow Cutoff
Only 2 Calibration Points Required
FLOW
Programmable Exponent
The programmable exponent function is used to linearize the level
signal in open channel flow applications using weirs and flumes
and display flow rate in engineering units.
4-20 mA output
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Trend Arrow
5 Digits, 0.6” High
Bargraph
Engineering Notation
Custom Engineering Units
Backlight is Standard
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