Precision Digital Corporation Loop Leader+ Series User manual

PD4-6624 & PD4-6628 Loop-Powered Flow Rate/Totalizers

Instruction Manual

PRECISION DIGITAL CORPORATION

233 South Street • Hopkinton MA 01748 USA

Tel (800) 343-1001 • Fax (508) 655-8990

www.predig.com

•Large Display NEMA 4X, IP65 Loop-Powered Wall & Pipe Mounted Flow Rate/Totalizers

•4-20 mA Input Displayed with ±0.02% Accuracy

•2.1 Volt Drop Maximum

•2.8" (71 mm) 5 Alphanumeric 14-Segment Characters Top Display

•1.5" (39 mm) 8 Alphanumeric 14-Segment Characters Bottom Display

•20-Segment Bargraph with Numeric Percent Indication

•8-Digit Total & Grand Total Display, Up to 13 Digits Using Both Lines

•Display Rate & Total Simultaneously

•Automatic or Manual Batch Control

•Display Open Channel Flow with Programmable Exponent Feature

•32-Point Linearization & Square Root Extraction

•(2) Open Collector Outputs Standard; Assignable to Pulse, Alarm, Timer, or Stopwatch

•(2) Optional Loop-Powered Solid-State Relays; Assignable 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

•Externally DC Powered Backlight with Red Backlight for Alarm Conditions

•Safe Area Operating Temperature Range: -40 to 75°C (-40 to 167°F)

•Conformal Coated PCBs for Dust & Humidity Protection

•Password Protection

•ATEX and IECEx Certified as Intrinsically Safe (PD4-6628 Only)

•Pipe Mounting Kit Available

•Light / Horn & Reset Button Accessory

•Control Station Accessory for Remote Operation of Instrument

•3-Year Warranty

IECEx

All Models

PD4-6628 Only

PD4-6624 & PD4-6628 Loop-Powered Flow Rate/Totalizers

Instruction Manual

The Complete PD4-6600 Series

General Purpose

PD4-6603

Feet & Inches Meter

PD4-6604

Process Meter

PD4-6624

Flow Rate/Totalizer

Hazardous Area

PD4-6607

Feet & Inches Meter

PD4-6608

Process Meter

PD4-6628

Flow Rate/Totalizer

PD4-6624 & PD4-6628 Loop-Powered Flow Rate/Totalizers 
Instruction Manual 
 
3
 
Table of Contents 
Introduction......................................................................................................... 6 
Key Features....................................................................................................... 7 
Ordering Information........................................................................................ 11 
Accessories.................................................................................................. 11 
Specifications................................................................................................... 14 
Display .......................................................................................................... 14 
General.......................................................................................................... 14 
Input .............................................................................................................. 15 
Rate/Totalizer................................................................................................ 15 
Batch Control ............................................................................................... 15 
Common Open Collector & Relay Specifications...................................... 16 
Open Collector Outputs............................................................................... 16 
Solid-State Relays........................................................................................ 16 
4-20 mA Transmitter Output........................................................................ 16 
On-Board Digital Input................................................................................. 16 
Remote Contacts.......................................................................................... 17 
MeterView XL Programming Software........................................................ 17 
General Compliance Information.................................................................... 17 
Electromagnetic Compatibility.................................................................... 17 
PD4-6628 Compliance Information ................................................................. 18 
Hazardous Area Approvals ......................................................................... 18 
EU Declaration of Conformity............................................................................. 19 
Safety Information............................................................................................ 19 
Field Modification......................................................................................... 19 
Installation......................................................................................................... 19 
Unpacking..................................................................................................... 19 
Wall Mounting Instructions ......................................................................... 20 
Mounting Dimensions ................................................................................ 20 
Conduit Holes Location.............................................................................. 20 
Pipe Mounting Instructions......................................................................... 21 
MeterView XL Programming Software........................................................ 22 
MeterView XL Software Installation ........................................................... 22 
Connecting to the Computer...................................................................... 23 
Specifications............................................................................................. 23 
Connections...................................................................................................... 24 
Connectors Labeling.................................................................................. 24 
Wiring Diagrams............................................................................................... 25 
I/O Parameter Table .................................................................................. 25 
Safe Area Current Loop (4-20 mA) Connections ....................................... 25 
Safe Area Digital Input Connections.......................................................... 25 
Safe Area 4-20 mA Output Connections.................................................... 26 
Safe Area Solid-State Relay Connections ................................................. 26 
Safe Area Open Collector Output Connections.......................................... 26 
Remote Operation of Meter........................................................................ 26 
Wiring Connections for MOD-PD2LH Models............................................ 27 
Setup and Programming.................................................................................. 28 
Overview....................................................................................................... 28 
MeterView XL Programming Software........................................................ 28 
Programming Buttons...................................................................................... 29 
Display Functions & Messages................................................................... 30 
Main Menu..................................................................................................... 34 
Setting Numeric Values ............................................................................. 35 
Scaling the 4-20 mA Input(INPUT).................................................................. 36 
Available Engineering Units....................................................................... 37 
Setting Custom Units (CUSTOM)................................................................. 37 
Scaling Example........................................................................................ 38 

PD4-6624 & PD4-6628 Loop-Powered Flow Rate/Totalizers 
Instruction Manual 
 
4
Setting the Display Features (DISPLAY).................................................... 38 
Changing the Engineering Units (UNITS).................................................. 38 
Changing the Decimal Point (DEC.PT)........................................................ 38 
Enabling or Disabling the Commas on the Bottom Display (COMMA) ......... 39 
Display Capabilities Optimization (TOP and BOTTOM)................................ 39 
Using 13 Digits to Display Total................................................................. 39 
Configuring the Display (TOp and BOTTOM).............................................. 40 
Programming the Bargraph........................................................................ 40 
Programming the Outputs (OUTPUT).......................................................... 41 
Open Collector Outputs (OPEN COLLECTR) ............................................. 42 
Solid-State Relay Outputs (RELAY)........................................................... 47 
Isolated 4-20 mA Output (4-20 mA)......................................................... 52 
Output Manual Control (CONTROL)............................................................ 52 
Advanced Features Menu (ADVANCED)....................................................... 53 
Advanced Rate Setup (ADV RATE)........................................................... 53 
Input Signal Conditioning Functions (FUNCTION) ..................................... 54 
Additional Engineering Units...................................................................... 61 
Low-Flow Cutoff (CUTOFF) ........................................................................ 62 
Noise Filter (FILTER)................................................................................ 62 
Enabling Password Protection (PASSWRD) ................................................ 62 
Programmable Function Keys User Menu (USER)..................................... 63 
Changing System Settings (SYSTEM)........................................................ 65 
Meter Operation................................................................................................ 67 
Front Panel Buttons Operation................................................................... 67 
Function Keys Operation............................................................................. 67 
Digital Input Operation................................................................................. 67 
Maximum/Minimum Readings..................................................................... 67 
Total Reset Capabilities............................................................................... 68 
Total Reset via Button Under Lower Panel Door ....................................... 68 
Total Reset via Remote Contact................................................................ 68 
Total Reset via Digital Input....................................................................... 68 
Total Reset Password Protection............................................................... 68 
Runtime & Cycle Count (INFO)................................................................... 68 
Changing Engineering Units....................................................................... 68 
Batch Controller Operation.............................................................................. 69 
Default Batch Control Operation................................................................. 69 
Batch Control Operation Example.............................................................. 69 
Manual Batch Control .................................................................................. 71 
Automatic Batch Control............................................................................. 72 
Troubleshooting............................................................................................... 73 
Reset Meter to Factory Defaults.................................................................. 73 
Determining Software Version.................................................................... 73 
Factory Default Settings............................................................................. 74 
Troubleshooting Tips................................................................................... 75 
 

PD4-6624 & PD4-6628 Loop-Powered Flow Rate/Totalizers

Instruction Manual

Table of Figures

Figure 1. Meter Mounting Holes Location .......................................................... 20

Figure 2. Meter Mounting Holes Dimensions..................................................... 20

Figure 3. Meter Dimensions –Side View............................................................ 20

Figure 4. Meter Dimensions - Front View ........................................................... 20

Figure 5. Conduit Holes Location –Bottom View.............................................. 20

Figure 6. Vertical Pipe Mount Assembly............................................................. 21

Figure 7. Horizontal Pipe Mount Assembly........................................................ 21

Figure 8. Connector Labeling for PD4-66XX-LNN.............................................. 24

Figure 9. Connector Labeling for PD4-66XX-L5N .............................................. 24

Figure 10. 4-20 mA Input Connection without Backlight................................... 25

Figure 11. 4-20 mA Input Connection with Backlight........................................ 25

Figure 12. Digital Input Connections .................................................................. 25

Figure 13. 4-20 mA Output Connections ............................................................ 26

Figure 14. Solid-State Relay Connections.......................................................... 26

Figure 15. Open Collector Output Connections................................................. 26

Figure 16. PDA2364-MRUE Control Station Connected

to Remote Contacts on PD4 ........................................................................ 26

Figure 17. Light / Horn and Button (MOD-PD2LH) Connected to PD4............. 27

Video

Watch the Loop-Powered Meters Video

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PD4-6624 & PD4-6628 Loop-Powered Flow Rate/Totalizers

Instruction Manual

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

All trademarks mentioned in this document are

the property of their respective owners.

Introduction

The Loop Leader+ 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, flowgrand 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

Leader+ 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 predig.com/meterviewxl.

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.

PD4-6624 & PD4-6628 Loop-Powered Flow Rate/Totalizers

Instruction Manual

Key Features

1. Available on PD4-6624 only. Requires external 24 VDC power.

2. Backlight requires external 24 VDC power.

Large Informative Display

One of the most convenient features of the PD4 Loop

Leader+ Series is its large, dual-line display. The

PD4’s whopping 2.8" 5-character alphanumeric top

display and 1.5" 8-character alphanumeric bottom

display, plus a 20-segment bargraph with percentage

indication on top, makes reading and understanding

process values easier than ever.

Predefined display units give users even more display

flexibility. Plus, the high contrast backlit LCD display

is readable from far away and under various lighting

conditions.

Backlight Turns Red on Alarm

When an alarm occurs, the display can be

programmed to turn red and flash. In addition, a

unique custom alarm message for each of the two

relays and two open collectors can be displayed on

the bottom display. These features can be activated

even if no relay or open collector is connected.

Commas on 8-Digit Totalizer for

Easy Reading

It may seem like a simple thing, but adding commas

to an eight-digit number makes it easier to read:

Dual-Scale Feature

Users can use the dual-scale feature to display

the input in two different scales. For instance, the

example below shows an application where the Loop

Leader+ displays the input in gallons per minute and

cubic feet per minute.

14-Segment Characters

Notice how much better letters like “T”, “N” and “K”

appear as 14-segment characters on the Loop Leader+

vs 7-segment characters found on many other meters.

PD4-6624 & PD4-6628 Loop-Powered Flow Rate/Totalizers

Instruction Manual

Predefined and Custom Units

The PD4-6624/28 flow rate/totalizers have the most

common predefined rate and volume units. If the

desired unit is not available, the user can program a

custom unit.

•If the total is disabled in the System –Total

menu, the meter has six available

preprogrammed unit classes: volume, height,

temperature, pressure, weight, and rate. When

the desired unit class or unit of measure within a

class is not available, a custom unit may be

programmed.

Password Protection

A password can be set up for programming security to

prevent unauthorized changes to the programmed

parameter settings.

Remote Contacts

Remote Contacts are standard on the PD4 and the

meter can be operated via a remote control station

(PDA2364-MRUE). The PDA2364-MRUE mimics the

PD4 meter’s four programming buttons: Menu, Right

Arrow, Up Arrow, and Enter.

Multiple Outputs

•Two open collector outputs (standard)

•Two solid-state relays (optional)

•One 4-20 mA output (optional)

The open collector outputs and relays generally

operate in the same manner, with the major exception

being the open collectors are not available for pump

alternation and the relays are not available with pulse

features. The open collectors and relays can be

controlled either automatically or manually.

The isolated analog output signal can be configured

to represent the process variable (rate, total, or

retransmit). It can also be reverse scaled such that

the meter’s high calibration value outputs 4 mA and

the meter’s low calibration outputs 20 mA.

Input Signal Conditioning

Functions (FUNCTION)

The Function menu is used to select the input signal

conditioner applied to the input: linear, square root,

programmable exponent, or round horizontal tank

volume calculation. Multi-point linearization is part of

the linear function selection.

Meters are set up at the factory for linear function with

2-point linearization. The linear function provides a

display that is linear with respect to the input signal.

Square Root Linearization (SQROOT)

The square root function can be used to linearize the

signal from a differential pressure transmitter and

display flow rate in engineering units.

PD4-6624 Displaying Flow Rate by Applying the Square

Root Function to the Output of a DP Transmitter.

Programmable Exponent

Linearization (EXPONENT)

The programmable exponent can be used to linearize

the signal from level transmitters in open-channel flow

applications using weirs and flumes.

The PD4-6624, in combination with an ultrasonic level

transmitter, makes for an economical way to measure

and display open channel flow rate in most weirs and

flumes. A guide such as the ISCO Open Channel

Flow Measurement Handbook can provide the user

with all the information needed: the exponent used in

the flow equation for the desired flow units and the

flow rate for any given head height. For example, to

display the open channel flow rate from a 3" Parshall

flume, the ISCO handbook advises the exponent is

1.547 and at the maximum head height of 3.0 feet,

the flow rate is 3.508 MGD.

PD4-6624 & PD4-6628 Loop-Powered Flow Rate/Totalizers

Instruction Manual

Rate/Totalizer Features

Display Flow Rate & Total at the

Same Time

The PD4-6624 can display flow rate and total at the

same time. In addition, the meter can toggle between the

rate and total and their corresponding units as the

following example illustrates.

Total Limit & Initial Value

The Advanced –Total Count menu allows the digit limit

to be selected between 8-digit (bottom display only) and

13-digit (uses top and bottom display to display the full

number).

The user can set the initial value at which the total and

grand total should start counting.

Using 13 Digits to Display Total

The top and bottom displays can be set up to display

a 13-digit total.

Note: The number above should be read as

6,843,276,349,187.

Total & Rate in Different Units

The user can select to display total in different units

than the rate. For instance, a customer could

measure flow rate in gallons per minute and total in

acre-feet by simply selecting AF (acre-feet) units for

the total. Additionally the user can enter a custom unit

and conversion factor to display the total in any unit of

measure.

Rate in Units Per Second, Minute,

Hour, or Day

The user may select a rate time base in units per

second, minute, hour, or day. The time base is the

amount of time over which the rate parameter will

totalize. For example, if the rate was 10 gallons/min

(and stayed constant for one minute), then the total

would increase by 10 every minute.

4-20 mA Output for Rate or Total

The 4-20 mA output can be assigned to the rate or

total.

Total Stored in Non-Volatile

Memory

Total and grand total values, and all programmed

settings are stored in non-volatile memory for a

minimum of ten years if power is lost.

Total Reset Capabilities

The total and grand total can be reset using a button

behind the lower panel door, the remote contacts

connected to a control station, an external contact

closure on the digital input, or MeterView XL. In

addition, both total and grand total reset can be

password protected to prevent unauthorized resets.

Total Reset via Button Under

Lower Panel Door

The PD4-6624 is equipped with four buttons located

under the lower panel door. The F2 function key is set

up to reset the total. If reset grand total is enabled, it

is possible for the user to reset either the total or the

grand total.

Total Reset via Remote Contact

The PD4-6624 is equipped with remote contacts

located behind the lower panel door of the meter.

These can be connected to a PDA2364-MRUE

control station for remote operation of all four

programming / operation buttons. The F2 function key

is set by default to reset the total and grand total.

4321

INPUTS

+ DI- mA- mA+

321

SSR OUTPU

C NO C N

RLY 2 RLY

mA OUT

I+ I-

MENU F1

ENTER

NEXT UP ENTER

F2 F3

REMOTE

CONTACTS

M R U E G

PD4-6624 & PD4-6628 Loop-Powered Flow Rate/Totalizers

Instruction Manual

Total Reset via Digital Input

The PD4-6624’s digital input may also be used to reset

the total or grand total using a PDA2361-R control

station.

Total Reset Password Protection

Total and grand total passwords can be set to prevent

resetting the total or grand total unless a password is

entered. Grand total reset can be disabled through

the meter interface, and it can also be permanently

disabled.

Non-Resettable Grand Total

The user can set up the grand total to be non-resettable by

selecting YES at the PERMLOC menu; see page 59 for

details. Once this is done, the grand total can never be reset.

Batch Control Capabilities

The metercan be equipped with two solid-state relays

that may be set up for batch control. Selecting batch

control for relay 1 enables the batching features on the

meter. The top display changes to show the total and the

bottom display changes to show the batch preset. The

function keys also change for batch control functions

such as F1 starts a batch, F2 opens the preset menu to

allow the preset value to be changed, and F3 stops the

currently running batch. Enabling batch control for

relay 1 allows access to the batch menu under relay 2.

The second relay may be programmed as a preclose

relay or as another batching relay with its own preset

amount.

Manual or Automatic Operation

Batching can be set to either manual or automatic

operation.

If set to automatic, then a delay before the next batch

starts must be programmed.

Count Up or Down Batching

The batch total can be set to count up or down.

DI+ DI- mA- mA+

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