Precision Digital Corporation Loop Leader PD6620 Series User manual

Loop Leader PD6620 Series Loop-Powered Flow Rate/Totalizers
Instruction Manual
PRECISION DIGITAL CORPORATION
233 South Street • Hopkinton MA 01748 USA
Tel [phone] • Fax [phone]
www.predig.com
•1/8 DIN Loop-Powered Flow Rate/Totalizers with NEMA 4X, IP65 Front
•4-20 mA Input Displayed with ±0.02% Accuracy
•1.5 Volt Drop (4.5 Volt Drop with Backlight)
•0.7" (17.8 mm) 5 Alphanumeric Characters Top Display
•0.4" (10.2 mm) 8 Alphanumeric Characters Bottom Display
•8-Digit Total & Grand Total Display, Up to 13 Digits Using Both Lines
•Display Rate & Total Simultaneously
•Display Open Channel Flow with Programmable Exponent Feature
•32-Point Linearization & Square Root Extraction
•20-Segment Bargraph with Numeric Percent Indication, Optional
•Shallow Depth Case Extends Only 3.6" (91 mm) Behind Panel
•(2) Open Collector Outputs Standard; Assigned to Pulse, Alarm, Timer, or Stopwatch
•(2) Optional Loop-Powered Solid State Relays; Assigned to Alarm, Sample, Timer, Batch, or Stopwatch
•Stopwatch & Timer Functions to Drive Relays & Open Collectors
•Optional Isolated 4-20 mA Analog Output
•Display Relay Runtime & Cycle Count via Relay Info Menu
•Free PC-Based MeterView XL USB Programming Software
•HART®Protocol Transparent
•Loop-Powered Backlight with Red Backlight for Alarm Conditions
•Safe Area Operating Temperature Range: -40 to 167°F (-40 to 75°C)
•Conformal Coated PCBs for Dust & Humidity Protection
•Password Protection
•UL & C-UL 61010 Listed for Electrical Safety
•UL & C-UL Listed as Intrinsically Safe and Nonincendive
•ATEX and IECEx Certified as Intrinsically Safe
•Wide Assortment of NEMA 4X Enclosures for up to Ten Meters
•Light / Horn & Reset Button Accessory
•Control Station Accessory for Remote Operation of Digital Input
•3-Year Warranty
IECEx
PD6626 & PD6628 Only

Loop Leader PD6620 Series Loop-Powered Flow Rate/Totalizers Instruction Manual
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Disclaimer
The information contained in this document is
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 - www.P65Warnings.ca.gov
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 www.predig.com for complete details.
Registered Trademarks
NORYL®and LEXAN®are registered trademarks of
SABIC Innovative Plastics. All other trademarks
mentioned in this document are the property of their
respective owners.
© 2021 Precision Digital Corporation.
All rights reserved.
Introduction
These loop-powered 1/8 DIN flow rate/totalizers can
be installed virtually anywhere to provide convenient
and informative display of flow rate and total from a
4-20 mA signal. One of the most convenient features
of these instruments is their ability to display both flow
rate and total at the same time. For instance, flow rate
is typically displayed on the 5-digit alphanumeric top
line and flow total or grand total is typically displayed
on the 8-digit alphanumeric bottom line. Both display
lines use 14-segment, alphanumeric characters for
clear indication of tags, units, or alarm messages.
Further enhancing the display on these instruments is
a 20-segment bargraph available on the PD6624 and
PD6628 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 1.5 V (4.5 V with
backlight), 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
front panel, 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. Finally,
there are intrinsically safe and nonincendive versions
of these instruments that can be installed in
hazardous areas.
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.
For more details, see the LIM6622MVXL manual.
All models come equipped with two open collector
outputs and a digital input. 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 digital input can be used to reset the total. The
relays can be programmed for alarm indication, on/off
control, or simple batch control.

Loop Leader PD6620 Series Loop-Powered Flow Rate/Totalizers Instruction Manual
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Ordering Information
General Purpose Instruments
Loop Leader PD6622 • Standard Decimal Models – General Purpose
Model
Description
PD6622–LNN
Loop-Powered, General Purpose, No Options
PD6622–L2N
Loop-Powered, General Purpose, Two Solid State Relays
PD6622–L3N
Loop-Powered, General Purpose, 4-20 mA Analog Output
PD6622–L5N
Loop-Powered, General Purpose, Two Solid State Relays and 4-20 mA Analog Output
Loop Leader PD6624 • Bargraph Models – General Purpose
Model
Description
PD6624–LNN
Loop-Powered, General Purpose, Bargraph, No Options
PD6624–L2N
Loop-Powered, General Purpose, Bargraph, Two Solid State Relays
PD6624–L3N
Loop-Powered, General Purpose, Bargraph, 4-20 mA Analog Output
PD6624–L5N
Loop-Powered, General Purpose, Bargraph, Two Solid State Relays and 4-20 mA Analog Output
Hazardous Area Instruments
Loop Leader PD6626 • Standard Decimal Models – Hazardous Area
Model
Description
PD6626–LNN
Loop-Powered, Hazardous Area, No Options
PD6626–L2N
Loop-Powered, Hazardous Area, Two Solid State Relays
PD6626–L3N
Loop-Powered, Hazardous Area, 4-20 mA Analog Output
PD6626–L5N
Loop-Powered, Hazardous Area, Two Solid State Relays and 4-20 mA Analog Output
Loop Leader PD6628 • Bargraph Models – Hazardous Area
Model
Description
PD6628–LNN
Loop-Powered, Hazardous Area, Bargraph, No Options
PD6628–L2N
Loop-Powered, Hazardous Area, Bargraph, Two Solid State Relays
PD6628–L3N
Loop-Powered, Hazardous Area, Bargraph, 4-20 mA Analog Output
PD6628–L5N
Loop-Powered, Hazardous Area, Bargraph, Two Solid State Relays and 4-20 mA Analog Output
Note: All models come with two open collector outputs and one digital input standard.
Enclosures
Series
# of Meters
Description
PDA2300
1 – 10
Plastic NEMA 4X: Hinged Cover, Clasp Closure, Meters Mount in Cover
PDA2500
1 – 6
Plastic NEMA 4X: Hinged Cover, Screw Closure, Meters Mount in Cover
PDA2600
1 – 6
Stainless Steel NEMA 4X: Hinged Cover, Screw Closure, Meters Mount in Cover
PDA2700
1 – 6
Painted Steel NEMA 4: Hinged Cover, Screw Closure, Meters Mount in Cover
PDA2800
1 – 2
Plastic NEMA 4X: Screwed Down Cover, Meters Mount in Cover
PDA3400
1 – 3
Plastic NEMA 4X: Screw Down Cover, Meters Mount Behind Cover
Need help selecting the right enclosure? Go to www.predig.com/esu
Accessories
Model
Description
PD9501
Multi-Function Calibrator
PD9502
Low-Cost Signal Generator
PDA1024-01
24 VDC Transmitter Power Supply for DIN Rail
PD659
Signal Isolators, Splitters, and Conditioners
PDA-LH
Light/Horn Accessory, See website for Available Colors
MOD-LH
Light/Horn/Enclosure Modification, See website for Available Colors

Loop Leader PD6620 Series Loop-Powered Flow Rate/Totalizers Instruction Manual
4
Table of Contents
Introduction......................................................................................................... 2
Ordering Information.......................................................................................... 3
General Purpose Instruments ....................................................................... 3
Hazardous Area Instruments ........................................................................ 3
Enclosures...................................................................................................... 3
Accessories .................................................................................................... 3
Specifications ..................................................................................................... 6
Display ............................................................................................................ 6
General............................................................................................................ 6
Input ................................................................................................................ 6
Rate/Totalizer.................................................................................................. 7
Batch Control ................................................................................................. 7
Common Open Collector & Relay (Alarm) Specifications .......................... 7
Open Collector Outputs................................................................................. 7
Solid State Relays .......................................................................................... 8
4-20 mA Transmitter Output.......................................................................... 8
On-Board Digital Input ................................................................................... 8
MeterView XL Programming Software.......................................................... 8
General Compliance Information ...................................................................... 8
Electromagnetic Compatibility...................................................................... 8
PD6626 & PD6628 Compliance Information ..................................................... 9
Safety .............................................................................................................. 9
Hazardous Area Approvals ........................................................................... 9
Safety Information ............................................................................................ 10
Installation......................................................................................................... 11
Unpacking..................................................................................................... 11
Panel Mounting Instructions ....................................................................... 11
Dimensions ....................................................................................................... 12
Connections...................................................................................................... 12
Connectors Labeling.................................................................................. 12
Wiring Diagrams ............................................................................................... 13
Safe Area Current Loop (4-20 mA) Connections ....................................... 13
Safe Area Digital Input Connection ............................................................ 13
Safe Area 4-20 mA Output Connections.................................................... 13
Safe Area Solid State Relay Connections.................................................. 13
Safe Area Open Collector Outputs............................................................. 13
Setup and Programming.................................................................................. 14
Overview ....................................................................................................... 14
MeterView XL Programming Software........................................................ 14
Front Panel Buttons and Status LED Indicators........................................ 14
Display Functions & Messages................................................................... 15
Main Menu..................................................................................................... 19
Setting Numeric Values ............................................................................. 19
Scaling the 4-20 mA Input (INPUT) .................................................................. 19
Available Unit Classes and Units ............................................................... 20
Setting Custom Units (CUSTOM)................................................................. 20
Scaling Example ........................................................................................ 20
Setting the Display Features (DISPLAY) .................................................... 21
Changing the Engineering Units (UNITS).................................................. 21
Changing the Decimal Point (DEC.PT) ........................................................ 21
Enabling or Disabling the Commas on the Bottom Display (COMMA) ......... 21
Display Capabilities Optimization (TOP and BOTTOM)................................ 21
Configuring the Display (TOp and BOTTOM)............................................... 22
Programming the Bargraph (PD6624 & PD6628 Only).............................. 22

Loop Leader PD6620 Series Loop-Powered Flow Rate/Totalizers Instruction Manual
5
Programming the Outputs (OUTPUT) .......................................................... 23
Open Collector Outputs (OPEN COLLECTR) ............................................. 23
Solid State Relay Outputs (RELAY) ........................................................... 26
Isolated 4-20 mA Output (4-20 mA) ......................................................... 29
Output Manual Control (CONTROL)............................................................ 29
Advanced Features Menu (ADVANCED)....................................................... 30
Advanced Rate, Total, and Grand Total Setup
(ADV RATE, TOTAL, GTOTAL) .................................................................. 30
Low-Flow Cutoff (CUTOFF) ........................................................................ 34
Noise Filter (FILTER)................................................................................ 34
Enabling Password Protection (PASSWRD) ................................................ 34
Programmable Function Keys User Menu (USER)..................................... 34
Changing System Settings (SYSTEM)........................................................ 36
Meter Operation ................................................................................................ 38
Front Panel Buttons Operation ................................................................... 38
Function Keys Operation............................................................................. 38
Digital Input Operation................................................................................. 38
Maximum/Minimum Readings..................................................................... 38
Runtime & Cycle Count (INFO) ................................................................... 39
Changing Engineering Units ....................................................................... 39
Troubleshooting ............................................................................................... 40
Reset Meter to Factory Defaults.................................................................. 40
Determining Software Version .................................................................... 40
Factory Default Settings............................................................................. 41
Troubleshooting Tips................................................................................... 42
EU Declaration of Conformity for PD6622 & PD6624 .................................... 43
EU Declaration of Conformity for PD6626 & PD6628 .................................... 44
Table of Figures
Figure 1. 1/8 DIN Panel Cutout Dimensions ................................................... 11
Figure 2. Panel Mounting Details .................................................................... 11
Figure 3. Meter Dimensions - Side View......................................................... 12
Figure 4. Meter Dimensions - Front View ....................................................... 12
Figure 5. Connector Labeling for PD662#-LNN.............................................. 12
Figure 6. Connector Labeling for PD662#-L2N with 2-Solid State Relays ... 12
Figure 7. Connector Labeling for PD662#-L3N with 4-20 mA
Analog Output........................................................................................... 12
Figure 8. Connector Labeling for PD662#-L5N with 2 Solid State Relays
& 4-20 mA Analog Output ........................................................................ 12
Figure 9. 4-20 mA Input Connection without Backlight ................................ 13
Figure 10. 4-20 mA Input Connection with Backlight .................................... 13
Figure 11. Digital Input Connections .............................................................. 13
Figure 12. 4-20 mA Output Connections ........................................................ 13
Figure 13. Solid State Relay Connections...................................................... 13
Figure 14. Open Collector Output Connections............................................. 13

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
www.predig.com 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.

Loop Leader PD6620 Series Loop-Powered Flow Rate/Totalizers Instruction Manual
7
Rate/Totalizer
Rate Display
Top display: -9999 to 99999;
Bottom display: -9,999,999 to 99,999,999
(with commas)
Total & Grand
Total Display
Top display: -9999 to 99999;
Bottom display: 0 to 99,999,999
(with commas)
13-Digit Total &
Grand Total
Up to 9,999,999,999,999 using both lines
with 13-digit total feature enabled.
Total & Grand
Total Indication
On bottom display, “T” indicates total and
“GT” indicates grand total (not available on
bargraph models)
Total Decimal
Point
Up to four decimal places on top, up to
seven decimal places on bottom. Total
decimal point is independent of rate
decimal point.
Totalizer
Calculates total based on rate and rate
units to display total in engineering units. A
custom factor must be programmed if using
custom defined units.
Time Base
Seconds, Minutes, Hours, Days
Totalizer
Rollover
Totalizer rolls over when display exceeds
99,999,999 (9,999,999,999,999 if 13-digit
limit enabled). Relay status reflects display.
Total & Grand
Total Reset
Via front panel button, external contact
closure on digital input, or MeterView XL.
Total & Grand
Total Reset
Passwords
Total and grand total passwords may be
entered to prevent resetting the total or
grand total unless a password is entered.
Non-Resettable
Grand Total
Grand total reset may be disabled through
the meter interface. Grand total reset may
be permanently disabled by selecting YES
at the PERMLOCK menu.
Caution: Once the Grand Total has been
programmed as “non-resettable” the
feature cannot be disabled
Batch Control
Methods
Automatic or Manual, count up or count
down
Manual Batch
Start
Pressing F1 function key starts the batch
Manual Batch
Pause/Stop
Pressing F3 once pauses the batch,
pressing it twice cancels the batch
Automatic
Batching
The Loop Leader can be used as an
automatic batch controller where batches
run continuously without operator input
Batching Relay
Operation
Single or dual-relay batching with optional
preclose for dual-stage operation
Batch Preset
Set via F2 function key anywhere between
0.0001 to 99,999 based on batch total
decimal point. If batch total is assigned to
bottom, the preset can be up to 8 digits.
Batch Preclose
For two-stage batch application, a preclose
value can be set to close the main flow
line.
Automatic Batch
Restart Delay
1 to 9,999 seconds. The batch will
automatically restart after completion
of the last batch.
Common Open Collector &
Relay (Alarm) Specifications
Number
Two open collectors & two relays
High or Low
Alarm
User programmable for high or low alarm
Alarm Deadband
0-100% FS, user programmable
Output
Assignment
Pulse, Alarm, Timer, Stopwatch, or
Disable
Alarm Output
Source
Assign to rate, total, grand total, or digital
input
On & Off Time
Delay
0 to 9,999 seconds
Fail-Safe
Operation
Independent for each open collector
and relay.
Fail-safe on, the output is on under
normal conditions.
Fail-safe off, the output is on under
alarm conditions.
Alarm Operation
Automatic, automatic with manual
override, latching (manual reset
anytime), latching with reset after
cleared (manual reset only after alarm
has cleared)
Alarm Indication
Programmable: red backlight, flashing
display, alarm symbol (!); (symbols not
available on bargraph models). Bargraph
segment flashes on alarm.
Alarm Message
Programmable: 8 characters maximum;
displayed every 10 sec for 1 sec on
bottom line. May be turned off.
Alarm
Acknowledge
Front panel ACK button or external
digital input resets output and screen
indication.
Auto Initialization
When power is applied to the meter,
open collectors and relays will reflect
the state of the input to the meter.
Timer Output
One-shot or Continuous
Off Time Delay: 1 sec to 99:59:59
(hrs:min:sec)
On Time: 1 sec to 99:59:59 (hrs:min:sec)
Stopwatch
Output turns on when started and off
when stopped.
Open Collector Outputs
Rating
Isolated open collector, sinking NPN
5-30 VDC @ 150 mA maximum
Output
Assignment
Pulse, Alarm, Timer, Total Reset,
Stopwatch on/off, or Disable
Pulse Output
Source
Rate, Total, Grand Total, or Test
Frequency
Pulse Output
Factor
0.000001 to 999,999.9
Pulse Width
0.5 ms @ 1 kHz; 500 ms @ 1 Hz;
50% duty cycle
Pulse Output
Frequency
1,000 Hz maximum
Quadrature Pulse
Output
Available for Output 2 (90° behind
Output 1) 500 Hz max
Alarm Output
Source
Assign to Rate, Total, Grand Total or
Digital Input

Loop Leader PD6620 Series Loop-Powered Flow Rate/Totalizers Instruction Manual
8
Solid State Relays
Rating
250 VAC/VDC @ 1A resistive
75VA; 250VAC; 0.6A pilot duty
(inductive) – UL Code D300
25VA; 250VDC; 0.6A pilot duty
(inductive) – UL Code R300
Noise
Suppression
Metal oxide varistors across outputs
Relay
Assignment
Alarm, Sample, Timer, Batch, Stopwatch
on/off, or Disable
Alarm Output
Source
Assign to Rate, Total, Grand Total, or
Digital Input
Relay Runtime
Meter will keep track of how long each
relay has operated and display this
information.
Relay Cycles
Meter will keep track of how many times
the relays have cycled and display this
information.
4-20 mA Transmitter Output
Accuracy
±0.05% FS ±0.001mA
Output Source
Rate, total, re-transmit; reverse scaling
allowed
Scaling Range
1.00 to 23.0 mA
Disable
High impedance state, less than 1 mA
Calibration
Factory calibrated 4.00 to 20.00 mA
Underrange
1.0 mA, 3.5 mA, or 3.8 mA
(If input < 3.5 mA); or Off;
user selectable
Overrange
20.5 mA, 20.8 mA, or 23.0 mA
(If input > 20.5 mA); or Off;
user selectable
Isolation
500 V input-to-output
Temperature Drift
0.5 µA/°C max from -40 to 75°C ambient
External Loop
Power Supply
7.0 VDC to 30.0 VDC maximum
Output Loop
Resistance
10-750 Ω @ 24 VDC; 10-1100 Ω @ 30 VDC
On-Board Digital Input
Function
Remote operation of front-panel buttons,
acknowledge/reset relays, reset total,
reset max/min values, etc. See User
section of Display Functions &
Messages on page 15 for a complete list
of capabilities.
Contacts
2.1 VDC on contact. Connect normally
open contacts across DI+ and DI-
Logic Levels
Logic High: 2.4 to 30 VDC (max)
Logic Low: 0 to 0.9 VDC
MeterView XL Programming
Software
Availability
Free download from www.predig.com
System
Requirements
Microsoft® Windows® 7 & 10
Communications
USB 2.0
(Standard USB A to Micro USB B)
Configuration
Configure all parameters on the meter.
Configure meters one at a time.
Configuration Files
Generate with or without meter
connected; Save to file for later use.
USB Power
Connection
Meter is powered by USB connection
during programming, if 4-20 mA loop is
not connected.
For detailed programming software instructions
or to download MeterView XL software, visit
predig.com/meterviewxl.
General Compliance
Information
Electromagnetic Compatibility
EMC Emissions
•CFR 47 FCC Part 15 Subpart B Class A
emissions requirements (USA)
•AS/NZS CISPR 11:2004 Class A ISM
emissions requirements (Australia)
•EN 55011:2009/A1:2010
Group 1 Class A ISM emissions
requirements (EU)
•ICES-001 Issue 4 ISM emissions
requirements (Canada)
EMC Emissions
and Immunity
EN 61326-1:2013 EMC requirements for
Electrical equipment for measurement,
control, and laboratory use – Inductrial Use

Loop Leader PD6620 Series Loop-Powered Flow Rate/Totalizers Instruction Manual
9
PD6626 & PD6628
Compliance Information
Safety
UL & C-UL
Listed
USA & Canada
UL 61010-1, 3rd Edition;
CAN/CSA-C22.2 No. 61010-1-12, 3rd Edition
UL File
Number
E160849
Front Panel
UL Type 4X, NEMA 4X, IP65;
panel gasket provided
Low Voltage
Directive
IEC 61010-1:2010 (Third Edition)
Safety requirements for electrical equipment
for measurement, control, and laboratory use.
Additional
Standards
UL 50E
Hazardous Area Approvals
ATEX
Certificate Number: CML 17ATEX2015X
Ex ia IIC T4 Ga
II 1G
-
40°C ≤ Ta ≤ 70°C
IECEx
Certificate Number: IECEx CML 17.0008X
Ex ia IIC T4 Ga
Tamb = -40°C to +70°C
UL & C-UL
UL File Number: E494837
Class I, Division 1, Groups A, B, C
and D T4
Class I, Division 2, Groups A, B, C
and D T4
Ex ia IIC T4 (Canada); Class I Zone 0, Zone 1,
AEx ia IIC T4 (U.S.);
Class I Zone 2, Group IIC T4 (U.S.)
PROCESS CONTROL EQUIPMENT FOR
USE IN HAZARDOUS LOCATIONS
ATEX/IECEx Assessment Standards
ATEX
IECEx
EN 60079-0:2012+A11:2013
EN 60079-11:2012
IEC 60079-0:2011 Ed. 6
IEC 60079-11:2011 Ed. 6
UL Assessment Standards
United States
Standards
Canadian National
Standards
UL 913, Eighth Edition
UL 60079-0, Sixth Edition
UL 60079-11, Sixth Edition
Standard No. UL 121201,
9th Edition
CSA C22.2 No. 60079-0:15
CSA C22.2 No. 60079-11:14
CAN/CSA C22.2 No. 213-17
ATEX/IECEx Special Conditions for Safe Use
The following conditions relate to safe installation
and/or use of the equipment.
•The permitted ambient temperature range for the
PD6626/PD6628 is -40°C to 70°C.
•The equipment must be installed in an enclosure
which provides a minimum degree of protection of
IP20 for the equipment connections.
•Under certain extreme circumstances, the non-me-
tallic parts incorporated in the enclosure of this
equipment may generate an ignition-capable level
of electrostatic charge. Therefore, the equipment
shall not be installed in a location where the exter-
nal conditions are conducive to the build-up of
electrostatic charge on such surfaces. This is par-
ticularly important if the equipment is installed in a
zone 0 location. In addition, the equipment shall
only be cleaned with a damp cloth.
•The equipment loop/power port must be con-
nected to an intrinsically safe barrier with Uo≥ 11V.
•Entity parameters must meet the following require-
ments:
Ui: 30 V; Ii: 175 mA; Ci: 0 μF; Li: 0 μH; Pi: 1.0 W
•For ATEX Certification, barrier and transmitter
must be ATEX Certified with Entity Parameters
and must be connected per manufacturer’s in-
structions.
For European Community:
The PD6626/PD6628 must be installed in accordance
with the Essential Health & Safety Requirements of
Directive 2014/34/EU, the product certificates CML
17ATEX2015X and IECEx CML 17.0008X, and the
product manual.
UL/C-UL Special Conditions for Safe Use
•Associated apparatus may be in a Division 2 or
Zone location if so approved.
•Under certain extreme circumstances, the non-me-
tallic parts incorporated in the enclosure of this
equipment may generate an ignition-capable level
of electrostatic charge. Therefore the equipment
shall not be installed in a location where the exter-
nal conditions are conducive to the build-up of
electrostatic charge on such surfaces. This is par-
ticularly important if the equipment is installed in a
zone 0 location. In addition, the equipment shall
only be cleaned with a damp cloth.
•The equipment shall be installed in a tool secured
enclosure which provides a minimum degree of
protection of IP20 for the equipment connections.
•Entity parameters must meet the following require-
ments:
Ui: 30 V; Ii: 175 mA; Ci: 0 μF; Li: 0 μH; Pi: 1.0 W

Loop Leader PD6620 Series Loop-Powered Flow Rate/Totalizers Instruction Manual
10
I.S. Equipment
Entity
Parameters
Required
Relationship
Between Entity
Parameters
I.S. Barrier Entity
Parameters
V max (or Ui) ≥Voc or Vt (or Uo)
I max (or Ii) ≥Isc or It (or Io)
P max, Pi ≥Po
Ci + Ccable ≤Ca (or Co)
Li + Lcable ≤La (or Lo)
•For Division 2 and Zone 2 Applications:
Division 2 and Zone 2 installations do NOT require
the use of an intrinsically-safe barrier or
intrinsically-safe entity parameters. Class I,
Division 2, Groups A, B, C, and D T4 and Class I,
Zone 2, Group IIC T4, -40C <= Ta <= +70C.
Ratings: V = 30 V dc, I = 30 mA; Relay Ratings:
250V ac/dc 1A
For North American Community:
Installation and service of this device and/or
associated apparatus (barrier) should be performed
only by trained service personnel
and must be installed in accordance with the
manufacturer’s control drawing, Article 504 of the
National Electric Code (ANSI/NFPA 70) for installation
in the United States, or Section 18 of the Canadian
Electrical Code for installations in Canada.
• EXPLOSION HAZARD – Do not disconnect
equipment unless power has been removed or the
area is known to be non-hazardous
• RISQUE D’EXPLOSION – NE PAS BRANCHER NI
DÉBRANCHER SOUS TENSION.
Year of Construction
This information is contained within the serial number
with the first four digits representing the year and
month in the YYMM format.
Safety Information
• Read complete instructions prior to installation and
operation of the meter.
• Risk of electric shock or personal injury.
• Hazardous voltages exist within enclosure.
Installation and service should be performed only
by trained service personnel.
• Service requiring replacement of internal
components must be performed at the factory.
• Control room equipment must not use or generate
more than 250 VRMS or VDC.
• Hazardous location installation instructions for
associated apparatus (barrier) must be followed
when installing this equipment.
• For safe installation of an ATEX approved
transmitter in series with PD6626/PD6628 loop-
powered meters, the hazardous location installation
instructions for the transmitter, PD6626/PD6628
loop-powered meter, and associated apparatus
(barrier) must be compatible.
• PD6626/PD6628 Series Loop-Powered meters do
not add capacitance or inductance to the loop
under normal or fault conditions.
• Substitution of components may impair hazardous
location safety.
• Equipment contains non-metallic materials and
therefore special care and consideration should be
made to the performance of these materials with
respect to chemicals which may be present in a
hazardous environment.

Loop Leader PD6620 Series Loop-Powered Flow Rate/Totalizers Instruction Manual
11
Installation
There is no need to remove the meter from its case
to complete the installation, wiring, and setup of the
meter for most applications.
PD6626 and PD6628 installation must be
performed in accordance with Control Drawing
LIM6600-2 in order to meet agency approval
ratings.
Unpacking
Remove the meter from box. Inspect the packaging
and contents for damage. Report damages, if any,
to the carrier.
If any part is missing or the meter malfunctions,
please contact your supplier or the factory for
assistance.
Panel Mounting Instructions
•Prepare a standard 1/8 DIN panel cutout – 3.622"
x 1.772" (92 mm x 45 mm). Refer to Figure 1and
Figure 2below, for more details.
•Clearance: allow at least 4.0" (102 mm) behind
the panel for wiring.
•Panel thickness: 0.04" - 0.25" (1.0 mm - 6.4 mm).
Recommended minimum panel thickness to
maintain Type 4X rating: 0.06" (1.5 mm) steel
panel, 0.16" (4.1 mm) plastic panel.
•Remove the two mounting brackets provided with
the meter (back-off the two screws so that there is
¼" (6.4 mm) or less through the bracket. Slide the
bracket toward the front of the case and remove).
•Insert meter into the panel cutout.
•Install mounting brackets and tighten the screws
against the panel. To achieve a proper seal,
tighten the mounting bracket screws evenly until
meter is snug to the panel along its short side.
DO NOT OVER TIGHTEN, as the rear of the
panel may be damaged.
Figure 1. 1/8 DIN Panel Cutout Dimensions
Figure 2. Panel Mounting Details

Loop Leader PD6620 Series Loop-Powered Flow Rate/Totalizers Instruction Manual
12
Dimensions
All units: inches (mm)
Figure 3. Meter Dimensions - Side View
Figure 4. Meter Dimensions - Front View
• Use copper wire with 60°C or 60/75°C insulation for
all line voltage connections. Observe all safety
regulations. Electrical wiring should be performed in
accordance with all applicable national, state, and
local codes to prevent damage to the meter and
ensure personnel safety.
Connections
All connections are made to removable screw
terminal connectors located at the rear of the meter.
This section is only intended for PD6622 and PD6624
safe area installations.
PD6626 and PD6628 installation must be performed in
accordance with Control Drawing LIM6600-2 in order to
meet agency approval ratings.
Connectors Labeling
The connectors’ label, affixed to the meter, shows the
location of all connectors available with requested
configuration.
Figure 5. Connector Labeling for PD662#-LNN
Figure 6. Connector Labeling for PD662#-L2N
with 2-Solid State Relays
Figure 7. Connector Labeling for PD662#-L3N
with 4-20 mA Analog Output
Figure 8. Connector Labeling for PD662#-L5N with
2 Solid State Relays & 4-20 mA Analog Output
1.76"
(45mm)
0.59"
(15mm)
3.2"
(81mm)
2.45"
(62mm)
3.6"
(91mm)
660.20
GALLONS
1234
SIGNAL
43 6521
O1-O1+ O2+ O2- DI-DI+ mA- XmA+ BL-
OPEN COLLECTORS
DW2498
1234
SIGNAL
43 6521
O1-O1+ O2+ O2- DI-DI+ mA- XmA+ BL-
OPEN COLLECTORS
DW2499
1234
NOC C NO
SSR2 SSR1
1234
SIGNAL
43 6521
O1-O1+ O2+ O2- DI-DI+ mA- XmA+ BL-
OPEN COLLECTORS
DW2500
mA OUT
2
I-I+
1

Loop Leader PD6620 Series Loop-Powered Flow Rate/Totalizers Instruction Manual
13
Wiring Diagrams
Safe Area Current Loop (4-20 mA)
Connections
•PD6626 and PD6628 installation must be
performed in accordance with Control Drawing
LIM6600-2 in order to meet agency approval
ratings.
Signal connections are made to a six-terminal con-
nector labeled SIGNAL on Figures 5-8 on page 12.
The following figures show a 4-20 mA current loop
connected to the meter. Figure 9shows the connec-
tion without the backlight and Figure 10 shows the
connection with the backlight (the backlight can be
disabled/enabled in the SYSTEM menu). The meter is
powered by the 4-20 mA current loop.
There are no switches or jumpers to set up for the in-
put. Setup and programming is performed through the
front panel buttons or PC-based software.
Figure 9. 4-20 mA Input Connection without Backlight
Figure 10. 4-20 mA Input Connection with Backlight
The current input is protected against current
overload up to 1 amp. The display may or may not
show a fault condition depending on the nature of the
overload.
Safe Area Digital Input Connection
A digital input is standard on the meter. This digital
input is connected with a normally open contact
across DI+ and DI-, or with an active low signal
applied to DI+ and DI-.
Figure 11. Digital Input Connections
Safe Area 4-20 mA Output Connections
Connections for the 4-20 mA transmitter output are
made to the connector terminals labeled mA OUT.
The 4-20 mA output must be powered from an
external power supply.
Figure 12. 4-20 mA Output Connections
Safe Area Solid State Relay Connections
Relay connections are made to a four-terminal
connector labeled SSR1 and SSR2 on Figure 6.
Connector Labeling for PD6620 with 2-Solid State
Relays and Figure 8. Connector Labeling for PD6620
with 2 Solid State Relays & 4-20 mA Analog Output
on page 12. Each relay’s C terminal is common only
to the normally open (NO) contact of the
corresponding relay.
Figure 13. Solid State Relay Connections
Safe Area Open Collector Outputs
Open collector output 1 and 2 connections are made
to terminals labeled O1+ and O1-, and O2+ and O2-.
Connect the alarm or pulse input device as shown
below.
Figure 14. Open Collector Output Connections
DI+ DI- mA- mA+ BL-X
DI+ DI- mA- mA+ BL-X
DI+ DI- mA- mA+ BL-X
I+ I-
O1+ O1- O2+ O2-

Loop Leader PD6620 Series Loop-Powered Flow Rate/Totalizers Instruction Manual
14
Setup and Programming
The meter is factory calibrated prior to shipment to display
0 to 100, which corresponds to the 4-20 mA input. The
calibration equipment is traceable to NIST standards.
Overview
There are no jumpers to set; setup and programming
is done through the front panel buttons or PC-based
software.
The meter may be powered via the micro-USB
connection located on the right side of the meter for
the purposes of programming only. The backlight will
not work while the meter is powered via the USB
connection.
MeterView XL Programming
Software
The meter can also be programmed using PC-based
MeterView XL software. This software greatly simpli-
fies the programming process and allows the user to
save configuration files for later use.
The meter connects to the PC via a provided micro-
USB cable and is powered by the USB connection so
no additional power is needed during programming.
To download the MeterView XL programming
software, visit predig.com/meterviewxl.
For detailed programming software instructions, see
the LIM6622MVXL manual.
•Care should be exercised to avoid ground loops
when connecting the USB to an active loop (e.g.
power supply, transmitter, loop-powered meter,
etc.). It is recommended to connect the (mA+)
terminal of the meter to the (-) terminal of a two-
wire transmitter and the (mA-) to the (+) of the
next device in the loop or to the (-) terminal of the
power supply.
Front Panel Buttons and Status
LED Indicators
PD6622/PD6626
PD6624/PD6628
Button
Symbol
Description LED Status
Menu !Alarm Indicator
(PD6622/6 Only)
Right-
Arrow/F1
Password
Protection
Indicator
(PD6622/6 Only)
Up-Arrow/F2 G
Grand Total
Indicator
(PD6622/6 Only)
Enter/F3 TTotal Indicator
(PD6622/6 Only)
Rate Bargraph
(PD6624/8 Only)
1. Press the Menu button to enter or exit the
Programming Mode at any time.
2. Press or hold the Right-Arrow button to
scroll forward through the menus, select
digits during numeric programming, select
characters during text programming, or
decrement the value of a digit or character
selected with the Up-Arrow button.
3. Press and hold the Right-Arrow button to
zero or clear digits/characters while in data-
entry mode.
4. Press or hold the Up-Arrow button to scroll
backwards through the menus or to
increment the value of a digit or character.
5. Press the Enter button to access a menu or
to accept a setting or programmed
digit/character value.

Loop Leader PD6620 Series Loop-Powered Flow Rate/Totalizers Instruction Manual
15
Display Functions & Messages
The meter displays various functions and messages during
setup, programming, and operation. The following table
shows the main menu functions and messages in the order
they appear in the menu.
Parameter
Action/Setting Description
INPUT Program the meter 4-20 mA input
SCALE RATE Scale the rate input
UNITS Select the display units
/SECOND Units per second
/MINUTE Units per minute
/HOUR Units per hour
/DAY Units per day
GAL/(T) Gallons per time unit (T)
L/(T) Liters per time unit (T)
IGAL/(T) Imperial gallons per time unit (T)
M3/(T) Cubic meters per time unit (T)
BBL/(T) Barrels per time unit (T)
BUSH/(T) Bushels per time unit (T)
cuYD/(T) Cubic Yards per time unit (T)
cuFt/(T) Cubic Feet per time unit (T)
cuIn/(T) Cubic Inches per time unit (T)
LiBBL/(T) Liquid barrels per time unit (T)
BBBL/(T) Beer barrels per time unit (T)
HECtL/(T) Hectoliter per time unit (T)
AF/(T) Acre-Foot per time unit (T)
CUSTOM/(T) Custom unit per time unit (T)
INPUT 1 Program input 1 value
INP 1 Enter the input 1 value
DISP 1 Program display 1 value
DSP 1 Enter the display 1 value
INPUT 2 Program input 2 value (up to 32
points)
INP 2 Enter the input 2 value
DISP 2 Program display 2 value (up to 32
points)
DSP 2 Enter the display 2 value
SAVE?
Save programmed units, input,
and display values
OUTPUT Program the meter’s available
outputs
OPEN COLLECTR Program the meter’s open
collector outputs
OUTPUT1 Open collector 1 setup
OUTPUT2
Open collector 2 setup
DISABLE Disable the open collector
Parameter
Action/Setting Description
PULSE Program the open collector for
pulse output
ALARM Program the open collector for
alarm output
TIMER Program the open collector as a
timer
TOT RST Program the open collector for
total reset
STPWATCH Program the open collector to turn
on while the stopwatch is running
RELAY Program the meter’s relay outputs
OUTPUT1 Relay 1 setup
OUTPUT2 Relay 2 setup
DISABLE Disable the relay
ALARM Program relay for alarm
functionality
SAMPLE Program relay for sample
functionality
TIMER Program relay as a timer
BATCH Program the relay for batch control
functionality
STPWATCH Program relay to turn on while the
stopwatch is running
INFO View relay run time and cycle
count
4-20 mA Program the meter’s 4-20 mA
output
RATE Transmit a value based on the rate
display
TOTAL Transmit a value based on the
total display
RETRANS Retransmit the 4-20 mA input
signal
DISABLE Disable the 4-20 mA output
CONTROL Program manual or automatic
operation for the outputs
OC1 Open collector 1
OC2 Open collector 2
RELAY1 Relay 1
RELAY2 Relay 2
4-20 mA 4-20 mA output
AUTO Set selected output to automatic
operation
MANUAL Manually control selected output
operation
ADVANCED Program the meter’s advanced
features
RATE Advanced 4-20 mA rate input
programming
FUNCTION Select linear, square root, or
programmable exponent function

Loop Leader PD6620 Series Loop-Powered Flow Rate/Totalizers Instruction Manual
16
Parameter
Action/Setting Description
LINEAR Set meter for linear function and
select number of linearization
points
SQROOT Set meter for square root
extraction
EXPONENT Set meter for programmable
exponent and enter exponent
value
SCALE.CAL Scale or calibrate the 4-20 mA
input
SCALE RATE Scale the rate 4-20 mA input
CAL RATE Calibrate the rate 4-20 mA input
TOTAL Advanced total programming
COUNT Program the totalizer functionality
LIMIT Set the number of digits used for
the total
8-DIGIT Eight digits max (99,999,999)
13-DIGIT Thirteen digits max
(9,999,999,999,999) Requires top
and bottom line to display entire
number, total will roll over to zero
when it exceeds the limit.
INITIAL Set the total to start at a specific
number
RESET Enable or disable the ability to
reset the total
ENABLE Enable total reset (default)
DISABLE Disable total reset
GTOTAL Advanced grand total
programming
COUNT Program the totalizer functionality
LIMIT Set the number of digits used for
the total
8-DIGIT Eight digits max (99,999,999)
13-DIGIT Thirteen digits max
(9,999,999,999,999) Requires top
and bottom line to display entire
number, total will roll over to zero
when it exceeds the limit.
INITIAL
Set the total to start at a specific
number
RESET
Enable or disable the ability to
reset the grand total
ENABLE
Enable grand total reset (default)
DISABLE Disable grand total reset
PERMLOCK Set grand total as non-resettable
CUTOFF Set low-flow cutoff
DISABLE Disable low-flow cutoff
ENABLE Enable low-flow cutoff
FILTER Set noise filter value
1.0 SEC 1 second
2.0 SEC 2 seconds
Parameter
Action/Setting Description
4.0 SEC 4 seconds
8.0 SEC 8 seconds
16.0 SEC 16 seconds
OFF Turn filter off
BYPASS
Set filter bypass (0.0 to 99.9% FS)
PASSWRD Set a password for the meter
MAIN Program the main meter password
TOTAL
Program the total reset password
GTOTAL Program the grand total reset
password
USER Assign function keys and digital
input
F1
Assign F1 function key
F2 Assign F2 function key
F3 Assign F3 function key
DI Assign digital input
DISP FN Set the function key or digital input
to display a value
DISPLAY Cycle max, min, rate, total, and
grand total
D RATE Display the rate
D TOTAL Display the total
DISP GT Display the grand total
PCT.RATE Display the rate’s percentage of
max (20 mA)
D UNITS Display the rate, total, and grand
total units
D TAG Display the tags
DISPMIN Display the minimum rate value
DISPMAX Display the maximum rate value
MIN MAX Display the minimum and
maximum rate value
D mA IN Display the current mA input value
D mAOUT Display the current mA output
value
MENU FN Set the function key or digital input
to access a menu
RLYINFO Go to relay information menu
(INFO)
MANCTRL Go to output control menu
(CONTROL)
TIMR OC1 Open collector 1 timer
TIMR OC2 Open collector 2 timer
TIMER R1 Relay 1 timer
TIMER R2 Relay 2 timer
TIMER.FN Set the function key or digital input
to start or stop a timer
STRT.ALL Start all timers
STOP.ALL Stop all timers

Loop Leader PD6620 Series Loop-Powered Flow Rate/Totalizers Instruction Manual
17
Parameter
Action/Setting Description
S.STP.ALL Start or stop all timers
OC1 Start/stop open collector 1 timer
OC2 Start/stop open collector 2 timer
RLY1 Start/stop relay 1 timer
RLY2
Start/stop relay 2 timer
START Start the selected timer output
STOP Stop the selected timer output
STR-STP Start or stop the selected timer
output
BATCH.FN Set the function key or digital input
to batch control
START Start a batch
STOP Stop a batch
STR-STP Start or stop a batch
PRESET Preset batch amount
ALARM.FN Set the function key or digital input
to acknowledge an alarm or
access set points
ACK Acknowledge all active alarms
SETPOINT Access all output set points
SETPT.OC1 Access open collector 1 set point
SETPT.OC2 Access open collector 2 set point
SETPT.R1 Access relay 1 set point
SETPT.R2 Access relay 2 set point
SWATCH.FN Set the function key or digital input
to activate stopwatch
START Start the stopwatch
STOP
Pause/Stop the stopwatch
STR-STP Start or stop the stopwatch
HOLD FN Set the function key or digital input
to hold an output
HOLD.OUT Hold all outputs
HLD.UNHLD Hold or un-hold all outputs
OC1+2
Hold/un-hold open collector
outputs
RLY1+2
Hold/un-hold relay outputs
mAOUT Hold/un-hold 4-20 mA output
HOLD Hold selected output
HLD.UNHLD Hold or un-hold selected output
DISABLE Disable the function key or digital
input
RST FN Set the function key or digital input
to reset a value
RESET Reset min, max, or max/min rate
value
R MIN.MAX Reset max and min rate value
RST T Reset the total
RST GT Reset the grand total
Parameter
Action/Setting Description
RST T.GT Reset the total and grand total
HINT Display hint text on first key press
and execute action on second key
press
OFF Turn the hint function off
ON Turn the hint function on
SYSTEM Program system settings
AOUTCAL Calibrate the analog output
DEFAULT Reset meter to factory defaults
TOTAL Enable or disable the totalizer
ENABLE Enable the totalizer (Default)
DISABLE Disable the totalizer (see PD6602
manual)
BACKLITE Enable or disable the display
backlight
ENABLE Enable the backlight (default)
DISABLE Disable the backlight
INFO View meter software version and
model, and change the meter
identifier tag
SFT The software ID number
VER The software version
MODEL The meter hardware model
number
ID.TAG The meter identifier tag
Press Enter to edit tag
ICAL Internal calibration used for scaling
DISPLAY Program the meter’s display
UNITS Change the display units within the
selected unit class
DEC.PT Change the decimal point location
RATE Program the rate decimal point
TOTAL Program the total decimal point
GTOTAL Program the grand total decimal
point
COMMA Enable or disable the use of a
comma to separate the thousands
place on the bottom display
ENABLE Enable comma (default)
DISABLE Disable comma
TOP Select what to display on the top
line
RATE Display the rate
RATE+U Display the rate and its units
alternating
TOTAL Display the total
TOTAL+U Display the total and its units
alternating
GTOTAL Display the grand total

Loop Leader PD6620 Series Loop-Powered Flow Rate/Totalizers Instruction Manual
18
Parameter
Action/Setting Description
TAG Display the tag
UNITS Display the units
PRESET Display the preset value
STPWATCH Display the stopwatch
TIMR OC1
Display open collector 1 timer
TIMR OC2 Display open collector 2 timer
TIMER R1 Display relay 1 timer
TIMER R2 Display relay 2 timer
MIN
Display minimum value
MAX Display maximum value
MIN MAX Display alternating min and max
BOTTOM Select what to display on the
bottom line
TOTAL Display the total
TOTAL+U Display the total and its units
alternating
TOT+TAG Display the total and its tag
alternating
T+U+RU Display the total, its units, and the
rate units alternating
GTOTAL Display the grand total
GT+UNITS Display the grand total and its
units alternating
GT+TAG Display the grand total and its tag
alternating
GT+U+RU Display the grand total, units, and
rate units alternating
RATE Display the rate
Parameter
Action/Setting Description
RATE+TU Display the rate and the total’s
units alternating
RATE+U Display the rate and its units
alternating
RATE+TAG Display the rate and its tag
alternating
R UNITS Display the rate units
T UNITS Display the total units
TAG Display the tag
UNITS Display the units
PRESET Display the preset value
STPWATCH Display the stopwatch
TIMR OC1 Display open collector 1 timer
TIMR OC2 Display open collector 2 timer
TIMER R1 Display relay 1 timer
TIMER R2 Display relay 2 timer
TAG+RU Display the tag and rate units
alternating
TAG+TU Display the tag and total units
alternating
OFF Disable the bottom display
R PCT Display the rate’s percentage of
full scale
ma IN Display the current mA input value
mA OUT Display the current mA output
value

Loop Leader PD6620 Series Loop-Powered Flow Rate/Totalizers Instruction Manual
19
Main Menu
The main menu consists of all the meter’s program-
mable functions: Input, Output, Advanced, and Dis-
play.
•Press Menu button to enter Programming Mode
then press the Right-Arrow button to move for-
ward through the menu and the Up-Arrow button
to move back.
•Press Menu at any time to go back one level or
press & hold to exit and return to Run Mode.
Changes made to settings prior to pressing Enter
are not saved.
•Changes to the settings are saved to memory
only after pressing Enter/F3 to confirm the set-
ting or pressing Enter/F3 at the SAVE? screen
when available.
Note: The BARGRAPH menu appears in the PD6624/8
menu only.
Setting Numeric Values
The numeric values are set using the Right and
Up-Arrow buttons.
1. Press Right-Arrow to select next digit and
Up-Arrow to increment digit value. The
selected digit will flash.
2. Press and hold Up-Arrow to auto-increment
the display value. If you have made a
mistake or would like to enter a new value,
select the left-most digit and press and hold
the Right-Arrow button until all digits reset
to zero.
3. Press the Enter button at any time to accept
a setting or Menu button to exit without
saving changes.
Note: the underscore in the graphic below is provided
to show which digit would be flashing.
Scaling the 4-20 mA Input (INPUT)
It is very important to read the following information
before proceeding to program the meter:
•The meter is factory calibrated prior to shipment
to display 0.00 to 100.00 gal/s, which corre-
sponds to the 4-20 mA input. The calibration
equipment is traceable to NIST standards.
•A calibrated signal source is not needed to scale
the meter.
Enter the Input menu to scale the meter to display the
4-20 mA input. The input can accept any signal from
4 to 20 mA.
DSP 1
+00,000.00 DSP 1
00,000.00
Select
Digit to
Change
DSP 1
00,050.00
Increment
Selected
Digit
SCALE
INPUT 2
Accept
Setting
SETUP
INPUT
SCALE
UNITS
SCALE
INPUT 1
SCALE
DISP 1
TIME
/SECOND
UNIT
GAL/S
/SECOND
/MINUTE
/HOUR
/DAY
Rate Time
Bases
INP 1
04.000
INP 1
mA
Flashes Units
Momentarily
DSP 1
+00,000.00
SCALE
INPUT 2
INP 2
20.000
SCALE
DISP 2
DSP 2
+00,100.00
SAVE? SETUP
INPUT
GAL/(T)
L/(T)
IGAL/(T)
Rate Units
M3/(T)
BBL/(T)
BUSH/(T)
cuYD/(T)
cuFt/(T)
cuIn/(T)
LiBBL/
(T)
BBBL/(T)
HECtL/
(T)
AF/(T)
CUSTM/
(T)
52.86
38,418.2
SETUP
INPUT SETUP
OUTPUT SETUP
ADVANCED SETUP DISPLAY
OPEN
COLLECTR ADV
RATE DSPLY
UNITS
OUT
RELAY
OUT
4-20 mA
OUT
CONTROL CUTOFF
FILTER
PASSWRD
USER
SYSTEM
DSPLY
DEC.PT
DSPLY
COMMA
DSPLY
TOP
DSPLY
DOTTOM
SCALE
UNITS
SCALE
INPUT 1
SCALE
DISP 1
SCALE
INPUT 2
SCALE
DISP 2
SAVE?
ADV
TOTAL
ADV
GTOTAL
Run Mode
DSPLY
BARGRAPH
*PD6624/8
Only *

Loop Leader PD6620 Series Loop-Powered Flow Rate/Totalizers Instruction Manual
20
Available Unit Classes and Units
The meter has preprogrammed rate and time base
units. The following are the available units to choose
from:
Rate Time Bases (TIME)
/SECOND
Units per second
/MINUTE
Units per minute
/HOUR
Units per hour
/DAY
Units per day
Rate Units (RATE)
GAL/(T)
Gallons per time unit (T)
L/(T)
Liters per time unit (T)
IGAL/(T)
Imperial gallons per time unit (T)
M3/(T)
Cubic meters per time unit (T)
BBL/
(T)
Barrels per time unit (T)
BUSH/(T)
Bushels per time unit (T)
cuYD/(T)
Cubic Yards per time unit (T)
cuFt/(T)
Cubic Feet per time unit (T)
cuIn/(T)
Cubic Inches per time unit (T)
LiBBL/(T)
Liquid barrels per time unit (T)
BBBL/
(T)
Beer barrels per time unit (T)
HECtL/(T)
Hectoliter per time unit (T)
AF/(T)
Acre-Foot per time unit (T)
CUSTOM/
Custom unit per time unit (T)
Note: for access to additional predefined units, you
must disable the totalizer. See Disabling the Totalizer
(TOTAL)on page Error! Bookmark not defined..
Setting Custom Units (CUSTOM)
When the desired unit of measure is not available, a
custom unit may be programmed. Select the
CUSTOM menu to enter a custom unit name.
Text values are set using the Right and Up-Arrow
buttons. Press Right-Arrow to select next character
and Up-Arrow to increment character value. The se-
lected character will flash. Press and hold the Up or
Right-Arrow buttons to auto-increment or decrement
the character. Press Enter to accept the character.
Notes:
•Press and hold the Right-Arrow while no
character is being edited to erase all charac-
ters to the right of the flashing character
•Press and hold Up or Right-Arrow to auto-in-
crement or decrement a selected character.
•All text values, including tags and alarm mes-
sages, are set in a similar fashion.
Scaling Example
The 4-20 mA input can be scaled to the appropriate
values for a given application. The 4 mA input
(input 1) should have a corresponding display value
(display 1) which represents the low end of the pro-
cess value range being measured by the transmitter.
Likewise, the 20 mA input (input 2) should have a dis-
play value (display 2) which represents the high end
of the process value range.
For example: If the meter is setup to accept a
4-20 mA input and display the flow of a pipe whose
rate of flow is between 0 and 100 gal/s, the transmit-
ter would send a 4 mA signal when there is zero flow
and a 20 mA signal when there is maximum flow. The
meter should be programmed to interpret these inputs
on a display range of 0-100, so that at 4 mA the meter
will display 0 and at 20 mA the meter will display 100.
Processes which require a non-linear scale can be
accommodated using the linear (LINEAR), exponent
(EXPONENT), and square root (SQROOT) functions
available in the Advanced menu. See Input Signal
Conditioning Functions (FUNCTION) on page 30.
A signal source is not needed to scale the meter;
simply program the inputs and corresponding display
values.