Model PD655 Large Display Process Meter
Instruction Manual
7
INTRODUCTION
This instrument is an analog input process meter with flow rate, totalizer, and
batch control capabilities housed in a rugged, impact-resistant glass filled
polycarbonate, NEMA 4X enclosure. It accepts the common process signals
such as 4-20 mA, 0-5 VDC, 1-5 VDC, and 0-10 VDC. It displays these signals in
engineering units on a 1.0" high 4½ digit LED display. The meter also provides
two isolated 24 VDC power supplies to drive both the input and output loops.
Options include up to 4 relays for alarms or batch controlling as well as an
isolated 4-20 mA transmitter output.
Key Features
This model contains several features of interest:
• Two 24 VDC Isolated Transmitter Power Supplies*
• 115 or 230 VAC Field Selectable Power
• Rate Display in Units per Day, in Addition to Second, Minute, and Hour
• Programmable Set points for Latching and Non-Latching Relay Operation
• Built-in Snubbers on Each Relay Contact
• Any Set Point Programmable for Process/Rate or Total
• Quit or Exit Menu Scroll with ACK Button
• Pump Alternation Control Feature for Rate Relays
• Automatic Square Root Extraction for Differential Pressure Transmitters
• Programmable Exponent for Weirs and Flumes
*Optional 18 VDC (nominal) @ 200 mA (maximum) unregulated power supply
can be provided instead of the two 24 VDC supplies. See Ordering Information,
page 8 for details.
