PD4-6624 & PD4-6628 Loop-Powered Flow Rate/Totalizers
Instruction Manual
6
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subject to change without notice. Precision Digital
Corporation makes no representations or warranties
with respect to the contents hereof; and specifically
disclaims any implied warranties of merchantability or
fitness for a particular purpose.
• Read complete instructions prior to installation and
operation of the meter.
• Risk of electric shock or personal injury.
• This product is not recommended for life support
applications or applications where malfunctioning
could result in personal injury or property loss.
Anyone using this product for such applications
does so at his/her own risk. Precision Digital
Corporation shall not be held liable for damages
resulting from such improper use.
WARNING
Cancer and Reproductive Harm -
Limited Warranty
Precision Digital Corporation warrants this
product against defects in material or
workmanship for the specified period under
“Specifications” from the date of shipment from
the factory. Precision Digital’s liability under this
limited warranty shall not exceed the purchase
value, repair, or replacement of the defective unit.
See Warranty Information and Terms &
Conditions on
details.
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© 2022 Precision Digital Corporation.
All rights reserved.
Introduction
The Loop loop-powered large display flow
rate/totalizers can be installed virtually anywhere to
provide convenient and informative display of any
4-20 mA signal. One of the most convenient features of
these instruments is their large, dual-line display which is
typically used to display flow rate on the 2.8" 5-character
alphanumeric top display and flow total, flow grand total,
or a tag on the 1.5" 8-character alphanumeric bottom
display. Both display lines use 14-segment,
alphanumeric characters that provide much clearer
indication of tags, units, or alarm messages than
7-segment characters do.
Further enhancing the display on these instruments is
a 20-segment bargraph that also includes a numeric
value of the percentage the bargraph represents.
These flow rate/totalizers can be installed virtually
anywhere because they get their power from the
4-20 mA loop and therefore require no separate
power source, and they only drop 2.1 V, so they add
very little burden to the loop. Additional features that
allow these instruments to be installed virtually
anywhere include a NEMA 4X, IP65 rated enclosure,
an operating temperature range of -40 to 167°F (-40
to 75°C) (for safe area products), conformally coated
PCBs, and a backlit LCD that can be read in bright
sunlight or dimly lit areas. The PD4-6628 model is an
intrinsically safe and nonincendive version of the Loop
that is agency approved for installation in
hazardous areas. It also carries electrical safety
approvals.
Free, PC-based, MeterView XL software that
connects to the meter via a micro USB cable is
available for programming and setup of the meters.
To download the latest MeterView XL programming
software and manual, visit
All models come equipped with two open collector
outputs and remote contacts. There are also models
available with two solid-state relays and isolated
4-20 mA analog output options. The open collector
outputs are useful for alarm indication or pulse output.
The remote contacts can be used to remotely operate
the four programming buttons, to reset the total, to
start/stop a timer/stopwatch, and more. The relays
can be programmed for alarm indication, on/off
control, or simple batch control.
