Loop Leader PD6620 Series Loop-Powered Flow Rate/Totalizers
Instruction Manual
6
Specifications
Except where noted all specifications apply to operation at +25°C.
Display
Display
Dual-line LCD with backlight. Both lines
14-segment alphanumeric. Top: 0.7"
(17.8 mm), Bottom: 0.4" (10.2 mm).
Display may be programmed to turn red
and flash a user-defined message on
alarm condition.
Backlight
Powered by 4-20 mA loop
Intensity varies with signal level
Top Line
5 digits (-9999 to 99999) or 5 characters
(all capital & most lower-case letters)
Bottom Line
8 digits (-9,999,999 to 99,999,999;
separated by commas) or 8 characters
(all capital & most lower-case letters)
Bargraph
20 segments, numeric percent indication
at top (PD6624 & PD6628 only)
Decimal Point
Up to four decimal places on top line and
up to seven decimal places on bottom line
Commas
Commas to indicate 1000s
(e.g. 88,987,628) on bottom line
Dual-Scale
Feature
The input can be displayed in different
scales on the top and bottom lines. For
instance, the top line could display the
flow in GPM and the bottom line could
display that same input in CFM.
Alarm Indication
Red backlight, flashing display, alarm
symbol (!); Symbols are not available
on bargraph models. Bargraph segment
flashes on alarm.
Alarm Message
On or Off; user programmable, 8
characters maximum. Displayed every
10 seconds for 1 second on bottom line.
Display Update
Rate
Ambient > -10°C: 1 Update/Second
Ambient = -20°C: 1 Update/2 Seconds
From -20°C to -40°C the update rate
slows down 1 second for every -2°C
(e.g. at -24°C, 1 update/4 seconds).
Overrange
Top: 99999; Bottom: 99,999,999 (flashing)
Underrange
Top: -9999; Bottom: -9,999,999 (flashing)
General
Environmental
Operating temperature range:
-40 to 75°C for safe area products
-40 to 70°C for hazardous area products
Storage temperature range:
-40 to 85°C
Relative humidity:
0 to 90% non-
condensing Printed circuit boards are
conformally coated.
Programming
Method
Front panel & Free PC-based USB
programming software
Enclosure &
Materials
Enclosure: 1/8 DIN, IP65, NEMA 4X front
panel, high impact plastic, NORYL® poly-
phenylene ether & polystyrene blend
(PPE PS) resin, UL 94V-0, Color: gray
Gasket: Silicone Rubber
Faceplate: LEXAN® polycarbonate (PC) Film
Buttons: Silicone rubber
Noise Filter
Averages the input signal over a period of
time between 1 and 16 seconds to
dampen the effects of a noisy signal that
causes a jumpy display.
Filter Bypass
0.0 to 99.9% of full scale. Input signal
changes greater than bypass value are
displayed immediately.
Recalibration
Recalibration is recommended at least
every 12 months.
Max/Min
Display
Max/min readings reached by the process
are stored until reset by the user or until
power to the meter is turned off.
Password
There are three password types available:
Main, Total, and Grand Total. The Main
password prevents access to the meter
Programming Mode. Total and Grand
Total passwords prevent resetting the
total and grand total, respectively.
Non-Volatile
Memory
All programmed settings and total and
grand total values are stored in non-
volatile memory for a minimum of ten
years if power is lost.
Normal Mode
Rejection
64 dB at 50/60 Hz
Connections
Removable screw terminals accept
12 to 22 AWG wire
Tightening
Torque
Screw terminal connectors:
4.5 lb-in (0.5 Nm)
Mounting screws:
8.0 lb-in max. (0.9 Nm)
Overall
Dimensions
4.68" x 2.45" x 3.79"
(119 mm x 62 mm x 96 mm) (W x H x D)
Weight
8.7 oz (247g) with option board
Warranty
3 years parts and labor. See Warranty
Information and Terms & Conditions on
for complete details.
Input
Input
4-20 mA
Accuracy
±0.02% of span ±1 count,
Square root and
programmable exponent: 10-100% FS
Voltage Drop
Without Backlight: 1.5 V maximum,
With backlight: 4.5 V maximum
Equivalent
Resistance
With backlight off: 75 Ω @ 20 mA
With backlight on: 225 Ω @ 20 mA
Input Overload
Over current protection to 1 A maximum
Over voltage protection to 30 VDC max
(between mA+ and mA-/BL-)
Temperature
Drift
25 PPM/°C from -40 to 75°C ambient
Function
Linear (2-32 points), square root, or
programmable
exponent
PV2: Linear (2-32 points) or round horizontal
tank (If total is disabled and PV2 is enabled)
Low-Flow Cutoff
0.1 to 999,999 or disable. Point below at
which the display always shows zero.
HART
Transparency
The meter does not interfere with existing
HART communications; it displays the
4-20 mA primary variable and it allows the
HART communications to pass through
without interruption. The meter is not
affected if a HART communicator is
connected to the loop. The meter does
not display secondary HART variables.
