Precision Digital Corporation Loop Leader PD6602/6 User manual

LOOP-POWERED PROCESS
PD6600 Series
Loop LeaderLoop-Powered Process Meter
Precision Digital corPoration www.predig.com
PD6602/6 Decimal Display PD6604/8 Decimal Display with Bargraph
DRAFT
PD6603/7 Feet & Inches Display
• 4-20 mA Input
• Loop-Powered Process Meter
• 1.5 Volt Drop (4.7 Volt Drop with Backlight)
• Loop-Powered Backlight with Red Backlight for Alarm Conditions
• NEMA 4X, IP65 Front
• -40 to 167°F (-40 to 75°C) Safe Area Operating Temperature Range
• Free PC-Based USB Programming Software
• 5-Digit Alphanumeric Top Line
• 8-Digit Alphanumeric Bottom Line
• Displays Level in Feet & Inches up to 999 Feet, 11 & 15/16 Inches
• 20-Segment Bargraph with Numeric Percent Indication
• Conformal Coated PCBs for Dust & Humidity Protection
• Two Open Collector Outputs Standard
• Optional Loop-Powered Solid-State Relays
• Optional 4-20 mA Analog Output
• Relay Pump Alternation Based on Level and Runtime
• Display Relay Runtime and Cycle Count
• UL & C-UL 61010 Listed for Electrical Safety
• UL & C-UL Listed as Intrinsically Safe and Nonincendive
• ATEX and IECEx Certified as Intrinsically Safe
IECEx
PD6606 & PD6607, PD6608 only

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2
PD6600 Series Loop LeaderLoop-Powered Process Meter
Dual-Line LCD with
5-Digit Alphanumeric
Top Line and 8-Digit
Alphanumeric
Bottom Line
NEMA 4X,
IP65 Front
Showing Red
Backlight for
Alarm Indication
PV, Max (Peak),
Min (Valley)
Front Panel
Buttons for Setup,
Programming, and
Operation
Indicators for
Alarm & Password
Protection
Preprogrammed
or Custom
Engineering Units
PD6602/6 Process Meter with
Decimal Display
INTRODUCTION
These loop-powered 1/8 DIN digital panel meters 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 dual line display which is typically used
to display the process variable on the 5-digit alphanumeric top
line and the units or a tag on the 8-digit alphanumeric bottom line.
Another common setup is to display the input in one scale on the
top line (such as feet) and another scale on the bottom line (such
as gallons). Both of these lines use 14-segment, alphanumeric
characters for clear indication of tags, units or alarm messages.
Furtherenhancingthedisplayonthese instruments is a20-segment
bargraph available on the PD6604/8 that also includes a numeric
value of the percentage the bargraph represents.
There is even a model that displays level in feet and inches for
customers who prefer to see their levels represented that way
rather than in decimal format.
These loop-powered meters 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
(4.7 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, software that connects to the meter via a micro
USB cable is available for programming and setup of the meters.
In addition, the meter can be programmed, setup and operated
via the four front panel buttons. Three of these buttons can be
used as function keys. In addition, a digital input is standard and
is particularly useful for remote reset of the alarms or to trigger an
alarm.
All models come equipped with two open collector outputs and are
available with two solid state relays and 4-20 mA analog output
options. The open collector outputs are useful for alarm indication
or pulse output. The relays can be programmed for alarm indication,
on/off control, or pump alternation.
THREE DIFFERENT DISPLAY TYPES
There are three different models of Loop Leaders that differ only in
their display:
• 5-Digit Alphanumeric Top Line
• 8-Digit Alphanumeric Bottom Line
• 5-Digit Alphanumeric Top Line
• 8-Digit Alphanumeric Bottom Line
• 20-Segment Bargraph with Numeric Percentage
• Feet & Inches on Top Line
• 8-Digit Alphanumeric Bottom Line
• 20-Segment Bargraph with Numeric Percentage
PD6602 & PD6606 Decimal Display
PD6604 & PD6608 Decimal Display with Bargraph
PD6603 & PD6607 Feet & Inches Display with Bargraph

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3
PD6600 Series Loop LeaderLoop-Powered Process Meter
Five (5) 0.7" Large
Digits on Top Line
in Feet & Inches
LED Backlight
Feet & Inches
Designation
Front Panel
Buttons for Setup,
Programming, and
Operation
Bargraph for Visual
Representation of
Level Applications
NEMA 4X, IP65 Front
8-Digit Alphanumeric
Bottom Line for Tag
or Dual Scale
Fractions of an Inch
PD6603/7 Feet & Inches Level
Meter with Bargraph
DISPLAY FEATURES
The Loop Leader’s display provides multiple ways to help users
understand and keep track of their processes. The most obvious
is the dual line which typically allows the user to display a numeric
value of the process variable on the top line and units and/or a tag
on the bottom line. There is also a bargraph that includes a numeric
value of the percentage the bargraph represents. Finally, to alert
users to an alarm condition, the display can turn red and flash an
alarm message.
Dual-Line Display with PV/Units/Tag/Bargraph
One of the most common configurations of these instruments is
displaying the process variable on the top line and units and a tag
toggling on the bottom line with a bargraph for additional clarity:
To help users get a quick understanding of where their process is
at, certain Loop Leader models are available with a 20-segment
bargraph. This bargraph also includes a numeric value of the
percentage the bargraph represents.
PV on the top line; units and tag toggling on the bottom line
Level in Feet & Inches with tag and bargraph
Alarms Indicated by Flashing Red Messages
When an alarm occurs, the Loop Leader’s display can be
programmed to turn red and flash an alarm message along with
the process variable and an alarm indicator (!). (Alarm indicator
symbols are not available on bargraph models) The Loop Leader’s
flashing red alarm message can be activated even if no relay or
open collector is connected.
Height Units on Top
Volume Units on Bottom
Feet Value on Top
Gallons Value on Bottom
Same Meter with Bottom Line toggling between
tag, volume (62,346), and units (Gallons)
Dual-Scale Display Feature
Users can use the Loop Leader’s dual-scale feature when they
want to show the same input in two different scales. For instance,
the following example shows an application where the Loop Leader
displays the input in feet and gallons:
Display Feet & Gallons and Toggle Between Units
Feet & Inches Display with Bargraph
There are Loop Leader models available for users that prefer to
see their level displayed in feet & inches instead of decimal format.
These versions can display level to 999FT 11IN & 15/16 on the top
line. The bottom line can toggle between a tag and units or if dual
scale mode is used, can display the input in a different scale such
as volume.

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4
PD6600 Series Loop LeaderLoop-Powered Process Meter
Bargraph Provides Quick Understanding
To help users get a quick understanding of where their process is
at, certain Loop Leader models are available with a 20-segment bar-
graph. This bargraph also includes a numeric value of the percent-
age the bargraph represents. The bargraph can be programmed to
represent the percent of PV1 or PV2 or it can be scaled to any range
within the scale.
Max/Min Display
The max & min readings (peak & valley) reached by the process can
be displayed either continuously or momentarily:
1. Display momentarily by pressing theF1 key (default)or assigning
to any of the other function keys or to the digital input in the User
menu. Press Enter to lock/unlock max/min display.
2. Display continuously by assigning either display line to max/min
through the Display menu.
Any of the F1-F3 function keys (buttons) and the digital input can be
programmed to reset the max & min readings.
PredenedandCustomUnits
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 by using the (CUSTOM) menu.
Change Between Units without Needing to
Re-Scale the Meter
It is possible to change the display units within the selected unit class
without the need to re-scale the meter. When selecting a new unit
from within the DISPLAY menu (e.g. changing from gallons (GAL) to
liters (L)), the meter will automatically convert the display values to
display the new unit. If entering a custom unit (CUSTM), a custom
conversion factor will need to be entered.
Tare
The tare function zeroes out the display. In the case of scale weight,
tare is used to eliminate container weight and provide net weight
readings. The captured tare may be reset manually with any function
key or digital input.
OUTPUTS
Loop Leaders are available with two open collector outputs as
standard and two solid state relays and 4-20 mA output as options.
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 alarm status (with flashing
red message) will show on the display even with no output wired.
Two Open Collector Outputs
The Loop Leader is equipped with two NPN open collector outputs
that may be set up for pulse outputs, alarms, timed pulses, stopwatch
on/off, or disabled. Pulse outputs can be set to transmit the PV value
(PV1 or PV2 if meter is in dual-scale mode). Output 2 may be used
to generate a quadrature output based on the other open collector
output. An output test mode is also selectable to generate pulses at
a constant programmable frequency.
Two Optional Solid State Relays
The meter is optionally equipped with two solid state relays that may
be set up for alarms, timer, stopwatch on/off, or pump alternation.
The relays are rated at 250 VAC/DC @ 1 A for resistive loads and
75 VA @ 0.6 A, 250 VAC/DC max (Safe Area only) for inductive
loads. Alarms are available based on the PV value or the digital input.
Loop-Powered Relay Alarm Trip for General
Purpose & Hazardous Areas
The Loop Leader, with its two solid state relays, can be used as a
loop-powered relay alarm trip in both general purpose and hazardous
areas. The Loop Leader’s two relays can be programmed for two
different kinds of latching operation: Reset via momentary contact
closure at any time or reset via momentary contact closure only
after the alarm has cleared. And the Loop Leader’s display can be
programmed to turn red and flash an alarm message – something
not found on most loop powered alarm trips.
Resetting the Open Collectors and Relays
The open collectors and relays (alarms) may be programmed to reset
in the following ways:
• Automatic (AUTO): Alarm will reset automatically once the alarm
condition has cleared.
• Automatic/Manual (AUTO.MAN): Alarm will reset automatically
once the alarm condition has cleared but can also be reset using
theEnter button(orwhichever functionkey is setto acknowledge)
at any time.
• Latching (LATCH): Alarm must be reset manually and can be
done so at any time. Press the Enter (ACK) button at any time to
clear the alarm.
• Latching with Reset after Cleared (L-CLEAR): Alarm must be
reset manually and can only be done so after the alarm condition
has cleared. Press the Enter (ACK) button after the alarm
condition has cleared to reset the alarm.
Bargraph indicating a 200 gallon tank is just about full

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5
PD6600 Series Loop LeaderLoop-Powered Process Meter
Timer Function Application
ApplicationTimers areused ineveryday life;one ofthe mostcommon
examples is the microwave oven. Industrial timers are used in
process control applications where certain events or actions need to
be controlled by time. Examples include automatic and batch control
applications, where the relay needs to be energized for a specific
length of time.
The timer fuction is available on the open collector and relay outputs;
which means that you can have up to four timers per meter. The start
and stop actions can be triggered from the setup menu or by the
function keys and digital input. The meter can be setup to display the
off/on timer count down.
There are two modes of operation:
1. Continuous Timer (Interval)
At the start of the timer the output is off and turns on after the
Off Delay elapses. The output remains on for the duration of the
On Time. The cycle repeats until the user stops the timer either
from the menu or a function key.
2. One-Shot Timer
At the start of the timer the output is off and turns on after the
Off Delay elapses. The output remains on for the duration of the
On Time. The timer stops and the cycle does not repeat.
Optional Isolated 4-20 mA Output
The isolated analog output signal can be configured to represent
the process variable (PV1, PV2, or retransmit). While the output is
nominally 4-20 mA, the signal will accurately accommodate under-
and over-ranges from 1 to 23 mA. The output can be reverse scaled
such that the meter’s high calibration value outputs 4 mA and the
meter’s low calibration outputs 20 mA.
PUMP CONTROL
Loop Leaders, when ordered with the two solid state relays, have
several features that make them ideal for simple duplex pump
control. The relays can be programmed to alternate the pumps based
on level and runtime thus ensuring even wear on both pumps. If the
level remains constant (within on/off points), alternation is based on
runtime. If the level cycles the on/off points, alternation is based on
level and runtime. If the run time is set to 0, alternation is based on
level. The meter also keeps track of runtime for both pumps and the
number of times they have cycled.
Display Pump Runtime & Cycle Count
In addition to the two solid state relays for controlling pumps, the
Loop Leaders two open collectors could be used to indicate high or
low level alarm conditions.
Pump Alternation Application
The Loop Leader can be used as a pump controller to alternate
two pumps and provide high and low level alarm indication. The
pumps can be programmed to alternate on level and run time and
the meter can display the pump run times and the number of times
they have cycled. The PD6606–L2N can be used as an intrinsically
safe pump controller.
The meter can display the number
of times the relays have cycled
The meter can display pump
runtime for both pumps
Control
Relay #1
Hi
Alarm
Lo
Alarm
O1+O2+O1-O2-CCNO NO
Control
Relay #2
Main
Pump
ON
13 FT
OFF
3.5 FT
Backup
Pump
ON
ON
Level
Transmitter
4-20 mA Signal
If the backup pump is not able to keep up, and the level reaches 13.0 Feet ,
relay #2 transfers and starts the main pump as well.
Control
Relay #1
Hi
Alarm
Lo
Alarm
O1+O2+O1-O2-CCNO NO
Control
Relay #2
Main
Pump
ON
8.5 FT
OFF
3.5 FT
Backup
Pump
OFF
ON
Level
Transmitter
4-20 mA Signal
With the Pump Alternation feature activated, the next time the level reaches
8.5 Feet, relay #1 transfers and starts the backup pump.
Control
Relay #1
Hi
Alarm
Lo
Alarm
O1+O2+O1-O2-CCNO NO
Control
Relay #2
Main
Pump
ON
8.5 FT
OFF
3.5 FT
Backup
Pump
ON
OFF
Level
Transmitter
4-20 mA Signal
Relay #2 turns the main pump on at 8.5 Feet and turns it off at 3.5 Feet.
Main
Pump
ON
14 FT
OFF
8.5 FT
Backup
Pump
ON
ON
Level
Transmitter
4-20 mA Signal
Open Collector #1 trips the High Level Alarm at 14.0 Feet and causes the display to
turn red and flash a HI LEVEL alarm message. The HI alarm resets at 8.5 Feet
Control
Relay #2
Control
Relay #1 Lo
Alarm
Hi
Alarm
O1+O2+O1-O2-CCNO NO
Main
Pump
OFF
3.5 FT
ON
1.0 FT
Backup
Pump
ON
OFF
Level
Transmitter
4-20 mA Signal
Open Collector #2 trips the Low Level Alarm at 1.0 Foot and causes the display to
turn red and flash a LO LEVEL alarm message. The LO alarm resets at 3.5 Feet
Control
Relay #2
Control
Relay #1
Hi
Alarm
Lo
Alarm
O1+O2+O1-O2-CCNO NO
a. A sensor detects the bottle is in place and
triggers the digital input to start the timer
b. The timer output controls the filling pump
c. The On Time is set according to the time
needed to fill the bottle
NEW FEATURE: Loop Leader displays pump runtime and number of cycles.

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6
PD6600 Series Loop LeaderLoop-Powered Process Meter
Password Protection
A password can be set for programming security to prevent
unauthorized changes to the programmed parameter settings.
Input 1 is set to 4 mA Display 1 is set to 0.0
EASY PROGRAMMING AND SETUP
Loop Leaders can be programmed and setup either by using the
front panel buttons or free, PC-based software with USB interface.
Front Panel Buttons for Easy Setup,
Programming, and Other Functions
Loop Leader process meters include four front panel
buttons for setup and programming. The front panel
buttons along with the dual-line display makes the
Loop Leader easy to set up & program. Three of these
buttons are also function keys that can be programmed
to trigger certain events (i.e. acknowledge alarms,
reset max and/or min, disable/enable output relays, or
hold current relay states), provide direct menu access
points, and more.
One feature that makes the Loop Leaders particularly
easy to set up and program is that they can be scaled
without applying a calibrated or known input. The user simply enters
the desired values for Input 1 and Input 2 (for instance 4.000 and
20.00 mA) and the corresponding display values for these inputs (for
instance 0.0 and 2000.0)
Round Horizontal Tank Linearization
This function automatically calculates the volume in a round
horizontal tank with flat ends.
Square Root Linearization
The square root function can be
used to linearize the signal from
a differential pressure transmitter
and display flow rate in engineering
units.
Multi-Point Linearization
Meters are set up at the factory for linear function with 2-point linear-
ization. Up to 32 linearization points can be selected for the scaled
value under the linear function. Multi-point linearization can be used
to linearize the display for non-linear signals to convert level to flow
using weirs and flumes with complex exponent.
Programmable Exponent Linearization
The programmable exponent can be used to linearize the signal
from level transmitters in open-channel flow applications using
weirs and flumes.
FLOW
SIGNAL INPUT CONDITIONING
To satisfy applications that require scaling in ways other than the
usual 2-point linear method, the Loop Leader can also be scaled for
square root (DP flow), programmable exponent (open channel flow)
or round horizontal tank volume calculation.
Loop-Powered Isolator for General Purpose &
Hazardous Areas
The Loop Leader can be used as a loop-powered isolator for the
4-20 mA signal in both general purpose and hazardous areas with
the added benefit of a digital readout to display the process variable.
APPROVALS
All versions of these instruments are CE marked. The hazardous
area versions of these instruments are UL and C-UL Listed as
intrinsically safe and nonincendive and ATEX and IECEx Certified
for Intrinsic Safety in Hazardous Areas (Gas Atmospheres). These
versions are also UL and C-UL Listed under the UL 61010-1
General Safety Standard.
One of the most useful aspects of the hazardous area approvals is
that these instruments are approved by UL as nonincendive so they
can be installed in Division 2 areas with no additional protective
devices needed.
For Complete Details See Control Drawing LIM6600-2
at www.predig.com/PD6606
II 1G
Ex ia IIC T4 Ga
Ta = -40°C to +70°C
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
IECEx
Ex ia IIC T4 Ga
Tamb = -40°C to +70°C 0518

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7
PD6600 Series Loop LeaderLoop-Powered Process Meter
▲Connector Labeling for Fully Loaded Loop Leader
CONNECTIONS
Connectors Labeling
The connectors’ label, a󰀩xed to the meter, shows the location of all
connectors available with requested conguration.
Notes:
1. Panel cutout required: 1.772" x 3.622" (45 mm x 92 mm)
2. Panel thickness: 0.040 - 0.250" (1.0 mm - 6.4 mm)
3. Mounting brackets lock in place for easy mounting
4. Clearance: Allow 6" (152 mm) behind the panel
MOUNTING DIMENSIONS
1.76"
(45mm)
0.59"
(15mm) 3.2"
(81mm)
2.45"
(62mm)
3.6"
(91mm)
4.68"
(119mm)
2.45"
(62mm)
▲Meter Dimensions - Side View
▲Meter Dimensions - Front View
Units: Inch (mm)
See Website for 3D CAD Files
www.predig.com/documentation-cad
4-20 mA
Transmitter
Power
Supply
DI+ DI- mA- mA+ BL-X
4-20 mA
Transmitter
Power
Supply
DI+ DI- mA- mA+ BL-X
Safe Area Input Loop (4-20 mA) Connections
The following gures show a 4-20 mA loop connected to the meter.
The rst gure shows the connection without the backlight and
the second shows the connection with the backlight. The meter is
powered by the 4-20 mA current loop.
▲ 4-20 mA Input Connection without Backlight
▲ 4-20 mA Input Connection with Backlight
I+ I-
Power
Supply Device with
4-20 mA Input
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
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+.
DI+ DI- mA- mA+ BL-X
C NO C NO
Internal
Load Load
Relay connections are made to a
four-terminal connector. Each relay’s
C terminal is common only to the
normally open (NO) contact of the
corresponding relay.
Safe Area Solid State Relay Connections

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8
PD6600 Series Loop LeaderLoop-Powered Process Meter
O1+ O1- O2+ O2-
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.
See Control Drawing LIM6600-2 for
information on hazardous area wiring
at www.predig.com/PD6606
!
NEMA 4 & 4X FIELD ENCLOSURES
Precision Digital offers a variety of rugged enclosures that provide
a high degree of protection against harsh operating environments.
Thermoplastic and stainless steel NEMA 4X, and painted steel
NEMA 4 enclosures for up to 10 Loop Leader meters are available.
NEMA 4X Enclosures
are Available in Plastic
and Stainless Steel;
NEMA 4 Enclosures in
Painted Steel
Low-Cost
NEMA 4X
Enclosures
See Our Complete Offering and
Enclosure Selection Utility
at www.predig.com/esu
SPECIFICATIONS
Except where noted all specifications apply to operation at +25°C.
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: 4.7 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 (mA+ and mA-/BL-)
Temperature Drift: 25 PPM/°C from -40 to 75°C ambient
Function: PV1: Linear, square root, or programmable exponent
PV2: Linear or Round Horizontal Tank
Low-Flow Cutoff: 0.0 to 999,999.9
HART Transparency: Analog input will not interfere with existing
HART communications on the wired 4-20 mA signal.
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
PD6602 & PD6606:
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: None
PD6603 & PD6607:
Top line: -99FT 11IN 15/16 to 999FT 11IN 15/16
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
PD6604 & PD6608:
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
Decimal Point & Commas:
Top line: Up to four decimal places
Bottom line: Up to seven decimal places and commas to indicate
1000s (e.g. 88,987,628)
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 input
in height and the bottom line could display that same input in volume.
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)
MeterView XL Programming Software
MeterView XL System Requirements: Microsoft®Windows®7 & 10
Communications: USB 2.0 (Standard USB A to Micro USB B)
Configuration: 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.

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9
PD6600 Series Loop LeaderLoop-Powered Process Meter
Approvals (Select Models)
ATEX: II 1G, Ex ia IIC T4 Ga, Ta = -40°C to +70°C
Certificate number: CML 17ATEX2015X
IECEx: Ex ia IIC T4 Ga, Tamb = -40°C to +70°C
Certificate number: IECEx CML 17.0008X
UL & C-UL Listed as Intrinsically Safe and Nonincendive:
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
UL & C-UL 61010 Listed for Electrical Safety and Type 4X
Environmental:
Standards for Safety:
IEC 61010-1:2010 (3rd Edition);
UL 61010-1, 3rd Edition;
CAN/CSA-C22.2 No. 61010-1-12, 3rd Edition;
Additional Standards:
UL 50E
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®polyphenylene 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.
Tare: Zeros out display
Password: Programmable password restricts modification of
programmed settings.
Non-Volatile Memory: All programmed settings 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.
DI Digital Input Contacts: 2.1 VDC on contact. Connect normally
open contacts across DI+ and DI-
DI Digital Input Logic Levels: Logic High: 2.4 to 30 VDC (max)
Logic Low: 0 to 0.9 VDC
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
Common Open Collector & Relay (Alarm)
Specications
High or Low Alarm: User programmable for high or low alarm
Alarm Deadband: 0-100% FS, user programmable
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: Red backlight, flashing display, alarm symbol
(!) (symbols 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
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: Two NPN, Isolated open collector, 30 VDC @ 150 mA max
Output Assignment: Pulse, Alarm, Timer, Stopwatch on/off, or
Disable
Pulse Output Source: PV (PV1, PV2) 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)
Alarm Output Source: Assign to PV (PV1, PV2) or Digital Input
Solid State Relays
Rating: Resistive Load: 250 VAC/DC @ 1 A
Inductive Load: 75 VA @ 0.6 A, 250 VAC/DC max (Safe Area only)
Noise Suppression: Metal oxide varistors across outputs
Relay Assignment: Pump Alternation, Alarm, Timer, Stopwatch on/off,
or Disable
Alarm Output Source: Assign to PV (PV1, PV2) or Digital Input
Pump Alternation: Relays will alternate with each pump cycle and
alternation can be based on elapsed time. Pump alternation time can
be programed for: 0 to 999:59 (hrs:min)
Relay (Pump) Runtime: Meter will keep track of how long each relay
(pump) has operated and display this information
Relay (Pump) Cycles: Meter will keep track of how many times the
relays (pumps) have cycled and display this information
4-20 mA Transmitter Output
Accuracy: ±0.05% FS ±0.001mA
Output Source: PV1, PV2, 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; 100-1100 Ω @ 30 VDC
Try our convenient
meter selection utility
for all models at
www.predig.com/msu

www.predig.com
10
PD6600 Series Loop LeaderLoop-Powered Process Meter
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. This software greatly simplifies the programming process
and also allows the user to save configuration files for later use. The
meter will also be powered by the USB connection so no additional
power is needed during programming.
▲ The main screen displays an image of the connected meter and
includes various information about this meter, such as model
number, readings, and status.
▲ The Input/Scale window is used to:
▲ The Relay Output window is used to assign a specific task to the
2 relays such as alarm, sample, timer, stopwatch, or off. A custom
message that will flash every 10 seconds can also be added.
▲ The 4-20 mA Output window is used to program the isolated
4-20 mA output’s source, range, and under and over range values.
Function tHiS MEtER
Set the input 4-20 mA
Enable/disable the totalizer Totalizer enabled
Enable/disable the dual-scale feature Dual scale disabled
Scale the input Linear input, unit is gallons,
2 cal points, 4-20 mA = 0-100 GAL
●Free PC-Based USB Programming Software
●Easy Programming of Features Packed Product
●USB Connection Provides Power During Programming
●Save & Print Configuration Files without Meter Connected
●Micro USB Cable Provided
FREE SIMPLE TO USE METERVIEW XL PROGRAMMING SOFTWARE

PD6600 Series Loop LeaderLoop-Powered Process Meter
www.predig.com
LDS6602_F 04/18
Precision Digital corPoration
233SouthStreet•HopkintonMA01748USA•Tel(800)343-1001•Fax(508)655-8990
Loop Leader PD6606 Standard Decimal Models – Hazardous Area
Model Description
PD6606–LNN* Loop-Powered, Hazardous Area, No Options
PD6606–L2N Loop-Powered, Hazardous Area,
Two Solid State Relays
PD6606–L3N Loop-Powered, Hazardous Area,
4-20 mAAnalog Output
PD6606–L5N* Loop-Powered, Hazardous Area,
Two Solid State Relays and 4-20 mAAnalog Output
Loop LeaderPD6607•Feet&InchesModels– Hazardous Area
Model Description
PD6607–LNN* Loop-Powered, Hazardous Area, Feet & Inches,
No Options
PD6607–L2N Loop-Powered, Hazardous Area, Feet & Inches,
Two Solid State Relays
PD6607–L3N Loop-Powered, Hazardous Area, Feet & Inches,
4-20 mAAnalog Output
PD6607–L5N Loop-Powered, Hazardous Area, Feet & Inches,
Two Solid State Relays and 4-20 mAAnalog Output
Loop LeaderPD6608•Decimal/BargraphModels– Hazardous Area
Model Description
PD6608–LNN* Loop-Powered, Hazardous Area, Bargraph, No Options
PD6608–L2N Loop-Powered, Hazardous Area, Bargraph,
Two Solid State Relays
PD6608–L3N Loop-Powered, Hazardous Area, Bargraph,
4-20 mAAnalog Output
PD6608–L5N Loop-Powered, Hazardous Area, Bargraph,
Two Solid State Relays and 4-20 mAAnalog Output
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
specically disclaims any implied warranties of merchantability or tness for a particular purpose.
©2018 Precision Digital Corporation. All rights reserved.
Your Local Distributor is:
Loop Leader PD6602 Standard Decimal Models – General Purpose
Model Description
PD6602–LNN* Loop-Powered, General Purpose, No Options
PD6602–L2N Loop-Powered, General Purpose,
Two Solid State Relays
PD6602–L3N Loop-Powered, General Purpose,
4-20 mAAnalog Output
PD6602–L5N* Loop-Powered, General Purpose,
Two Solid State Relays and 4-20 mAAnalog Output
Loop LeaderPD6603•Feet&InchesModels– General Purpose
Model Description
PD6603–LNN* Loop-Powered, General Purpose, Feet & Inches,
No Options
PD6603–L2N Loop-Powered, General Purpose, Feet & Inches,
Two Solid State Relays
PD6603–L3N Loop-Powered, General Purpose, Feet & Inches,
4-20 mAAnalog Output
PD6603–L5N Loop-Powered, General Purpose, Feet & Inches,
Two Solid State Relays and 4-20 mAAnalog Output
Loop LeaderPD6604•Decimal/BargraphModels– General Purpose
Model Description
PD6604–LNN* Loop-Powered, General Purpose, Bargraph, No Options
PD6604–L2N Loop-Powered, General Purpose, Bargraph,
Two Solid State Relays
PD6604–L3N Loop-Powered, General Purpose, Bargraph,
4-20 mAAnalog Output
PD6604–L5N Loop-Powered, General Purpose, Bargraph,
Two Solid State Relays and 4-20 mAAnalog Output
ORDERING INFORMATION
General Purpose Instruments Hazardous Area Instruments
Notes:
1. All models come with two open collector outputs standard.
2. *Quick Shipment Program product, typically ships within 2 working days.
3. General Purpose Instruments are CE marked only.
4. Hazardous Area Instruments are UL Listed for both hazardous areas and general electrical safety and ATEX and IECEx certified as intrinsically safe.
Enclosures
Model Description
PDA2301 NEMA 4X Plastic Enclosure
PDA2501 Plastic NEMA 4X Enclosure
PDA2601 Stainless Steel NEMA 4X Enclosure
PDA2701 Painted Steel NEMA 4 Enclosure
PDA2801 Low-Cost Plastic NEMA 4X Enclosure
PDA3407 Internally Mount NEMA 4X Plastic Enclosure
Order from:
C A Briggs Company
622 Mary Street; Suite 101
Warminster, PA 18974
Phone: [phone]
Fax: [phone]
[e-mail] - www.cabriggs.com

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 
 


 
Precision Digital corPoration 
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


www.predig.com
2
 
Five (5) 0.7" Large Digits
on Top Line for Rate
Showing Red
Backlight for
Alarm Indication

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 of these lines use 14-segment, alphanumeric characters for
clear indication of tags, units or alarm messages.
Furtherenhancing the display onthese instruments is a20-segment
bargraph available on the PD6624/8 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
(4.7 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, software that connects to the meter via a micro
USB cable is available for programming and setup of the meters.
In addition, the meter can be programmed, setup and operated
via the four front panel buttons. Three of these buttons can be
used as function keys. In addition, a digital input is standard and
is particularly useful for remote reset of the total or to start/stop a
timer/batch.
All models come equipped with two open collector outputs and are
available with two solid state relays and 4-20 mA analog output
options. The open collector outputs are useful for alarm indication or
sending a pulse to indicate when a certain amount of total has been
accumulated. The relays can be programmed for alarm indication,
on/off control, sample taking, or simple batch control.
Bargraph Numeric
Percent Indication
Front Panel
Buttons for Setup,
Programming, and
Operation
Bargraph for Visual
Representation
of Rate or Total
Percentage
NEMA 4X,
IP65 Front
▲ PD6624/28 with Bargraph Shown

The Loop Leader’s display provides multiple ways to help users
understand and keep track of their processes. The most obvious is
the dual line which typically allows the user to display both flow rate
and total at the same time. There is also a bargraph that includes a
numeric value of the percentage the bargraph represents. Finally,
to alert users to an alarm condition, the display can turn red and
flash an alarm message.

One of the key features of the Loop Leader Flow Rate/Totalizers
is their ability to 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 illustrates:

8-Digit
Alphanumeric
Bottom Line for
Total, Grand Total,
and Predened or
Custom Units

In addition to the most common setup of flow rate on the top line
and flow total on the bottom line, these meters can be set up for a
variety of display configurations.

8-Digit Total
includes Commas
for Easier Reading









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3
 

BOTTOM
O󰀨 (Blank) Units for value on top line
Total (with units or tag alternating) Tag
Total, its units, and the rate and
units alternating Preset batch value
Grand total (with units or tag
alternating) Tag and rate units alternating
Grand total, units, and rate units
alternating Tag and total units alternating
Rate (with units or tag alternating) Rate’s percentage of max scale
Rate and the total’s units
alternating mA input value
Rate or total units mA output value
The following table shows the items that can be displayed on the
Top and Bottom lines:

To help users get a quick understanding of where their process is
at, certain Loop Leader models are available with a 20-segment
bargraph. This bargraph also includes a numeric value of the
percentage the bargraph represents. The bargraph can be
programmedtorepresenteithertherate ortotaloritcanbe disabled.
 

When an alarm occurs, the Loop Leader’s display can be
programmed to turn red and flash an alarm message along with
the process variable and an alarm indicator (!). (Alarm indicator
symbols are not available on bargraph models) The Loop Leader’s
flashing red alarm message can be activated even if no relay or
open collector is connected.

Users can use the Loop Leader’s dual-scale feature when they
want to show the same input in two different scales. For instance,
the following example shows an application where the Loop Leader
displays the input in gallons per minute and cubic feet per minute:





The max & min readings (peak & valley) reached by the process can
be displayed either continuously or momentarily:
1. Display momentarily by pressing theF1 key (default)or assigning
to any of the other function keys or to the digital input in the User
menu. Press Enter to lock/unlock max/min display.
2. Display continuously by assigning either display line to max/min
through the Display menu.
Any of the F1-F3 function keys (buttons) and the digital input can be
programmed to reset the max & min readings.









(note different units than Total)

It may seem like a simple thing, but adding commas to an eight-digit
number makes it easier to read:
TOp
O󰀨 (Blank) Preset batch value
Rate Stopwatch
Rate and its units alternating Timers OC and relays
Total Min
Total and its units alternating Max
Tag Min & max
Units

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4
 

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 by using the (CUSTOM) menu.


It is possible to change the display units within the selected unit class
without the need to re-scale the meter. When selecting a new unit
from within the DISPLAY menu (e.g. changing from gallons (GAL) to
liters (L)), the meter will automatically convert the display values to
display the new unit. If entering a custom unit (CUSTM), a custom
conversion factor will need to be entered.

Loop Leaders are available with two open collector outputs as
standard and two solid state relays and 4-20 mA output as options.
The open collector outputs and relays generally operate in the
same manner, with the major exception being the open collectors
are not available for batch control or sampling and the relays are
not available with pulse features. The open collectors and relays
can be controlled either automatically or manually. The alarm status
(with flashing red message) will show on the display even with no
output wired.

The Loop Leader is equipped with two NPN open collector outputs
that may be set up for pulse outputs, alarms, timed pulses, stopwatch
on/off, or disabled. Pulse outputs can be set to transmit the rate, total
or grand total. Output 2 may be used to generate a quadrature output
based on the other open collector output. An output test mode is also
selectable to generatepulses at aconstant programmable frequency.
The open collectors are commonly used to generate a pulse for every
user-defined amount of flow that has been generated. For instance,
the Loop Leader can be programmed to generate a pulse for every
100 gallons of flow.

The meter is optionally equipped with two solid state relays that may be
set up for alarms, timer, stopwatch on/off, sample or batch control. The
relays are rated at 250 VAC/DC @ 1 A for resistive loads and 75 VA @
0.6 A, 250 VAC/DC max (Safe Area only) for inductive loads. Alarms
are available based on the rate, total, grand total, or digital input.

The open collectors and relays (alarms) may be programmed to reset
in the following ways:
•  (AUTO): Alarm will reset automatically once the alarm
condition has cleared.
•  (AUTO.MAN): Alarm will reset automatically
once the alarm condition has cleared but can also be reset using
the Enter button(or whichever functionkey is setto acknowledge)
at any time.
•  (LATCH): Alarm must be reset manually and can be
done so at any time. Press the Enter (ACK) button at any time to
clear the alarm.
•  (L-CLEAR): Alarm must be
reset manually and can only be done so after the alarm condition
has cleared. Press the Enter (ACK) button after the alarm
condition has cleared to reset the alarm.

ApplicationTimers areused ineveryday life;one ofthe mostcommon
examples is the microwave oven. Industrial timers are used in
process control applications where certain events or actions need to
be controlled by time. Examples include automatic and batch control
applications, where the relay needs to be energized for a specific
length of time.
The timer fuction is available on the open collector and relay outputs;
which means that you can have up to four timers per meter. The start
and stop actions can be triggered from the setup menu or by the
function keys and digital input. The meter can be setup to display the
off/on timer count down.
There are two modes of operation:

At the start of the timer the output is off and turns on after the
Off Delay elapses. The output remains on for the duration of the
On Time. The cycle repeats until the user stops the timer either
from the menu or a function key.

At the start of the timer the output is off and turns on after the
Off Delay elapses. The output remains on for the duration of the
On Time. The timer stops and the cycle does not repeat.
 A sensor detects the bottle is in place and triggers the digital
input to start the timer
 The timer output controls the filling pump
 The On Time is set according to the time needed to fill the bottle

The isolated analog output signal can be configured to represent
the rate, total or to retransmit the 4-20 mA signal input without the
need to scale the output. While the output is nominally 4-20 mA, the
signal will accurately accommodate under- and over-ranges from 1
to 23 mA. The output can be reverse scaled such that the meter’s
high calibration value outputs 4 mA and the meter’s low calibration
outputs 20 mA.

A relay set to sample will trigger when the total or grand total value
has incremented by a programmed amount. The relay can be
programmed to stay on for a specified amount of time. For example:
if a relay is set to sample the total with a COUNT of 1,000 and a TIME
of 10 seconds, the relay will energize for 10 seconds each time the
total increments by 1,000 (e.g. 1000, 2000, 3000).

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5
 

The Loop Leader, when ordered with the two solid state relays, can be used as a simple, one or two-stage batch controller. The user enters
a preset and preclose value and sets the Loop Leader to either count up or count down. The top display will show the total and the bottom
display will show the preset batch amount. The function keys are automatically changed so that  starts a batch,  opens the preset menu
to allow the preset value to be changed, and  pauses/stops the currently running batch. Batching can be either automatic or manual.
The following shows the Loop Leader performing a manual batch operation:

The  is pressed. Both valves open.
The barrel begins to fill.

When the batch total reaches a value of 50.00 (Preset [55.00]
– Preclose [5.00]) the full-flow valve closes. The fill rate of the
tank slows as a result.

When the batch total equals the preset amount, the restricted-
flow valve closes. The barrel is now full.

After placing a new, empty barrel, a new preset fill amount
may be selected with the , while the process
is stopped.

Press the  and a new batch will begin.
With both valves open, the process continues.

At any time, the  may be pressed, once to
Pause the process, or twice to cancel the batch, which stops
the process.

Both valves are closed with an empty barrel in place. The
batched total is displayed in the top display, the preset is
selected for the bottom display.
The PD6626 and PD6628 are intrinsically safe batch controllers.

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6
 

Loop Leader flow rate/totalizers can be programmed for a wide
variety of totalizer applications. They can display total, grand total, or
non-resettable grand total; the rate can be displayed with a time base
of seconds, minutes, hours or days. The user can program a totalizer
conversion factor, a non-resettable grand total, password protection,
and several total reset methods.


The Loop Leader flow rate/totalizer can be programmed to show
eight full digits of total on the bottom display or 13 digits of total using
both the top and bottom displays. In both cases, the display can be
programmed to include commas to make it easier to read the very
large numbers; ie 44,987,356
In 13-digit mode, the bottom line shows the least significant digits
and the top line shows the most significant digits. The meter is not
capable of displaying commas on the top line, so this number is
actually 1,211,230,379. The comas can be removed from bottom if
desired. See sample on bottom, right.

The user can enter a totalizer conversion factor that allows the
meter to display total in different units than the rate. For instance, a
customer could measure flow rate in gallons per minute and total in
hundredths of acre-feet. A multiplier may be selected to automatically
display the value in kGAL, MGAL, etc.

The total and grand total can be password protected so they can be
reset only by authorized personnel.

The user can set up the grand total to be non-resettable by selecting
YES for PERMLOCK in the Advanced - Grand Total - Reset menu.
Once this is done, the grand total can never be reset.

The total can be reset via an external contact closure on the digital
input.

The three front panel function keys can be programmed to reset
the total and grand total. This makes it possible for the user to reset
either the total or the grand total by pressing the appropriate function
key. Of course, if the total or grand total is password protected, they
will not reset when the function key is pressed unless the password
is entered.
󰀨
The user may program the meter for a low-flow cutoff such that the
meter displays zero below this point, regardless of the input value.

The Loop Leader’s two relays can be set up to alarm when the
total reaches a user-defined set point. A variety of reset modes are
available and the user can also program time delays and fail-safe
operation.

Meters are set up at the factory for linear function with 2-point
linearization. Up to 32 linearization points can be selected for the
scaled value under the linear function. Multi-point linearization can
be used to linearize the display for non-linear signals to convert
level to flow using weirs and flumes with complex exponent.

A password can be set for programming security to prevent
unauthorizedchangestotheprogrammedparametersettings.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.
 

Loop Leaders can be programmed and setup either by using the
front panel buttons or free, PC-based software with USB interface.


Loop Leader process meters include four front panel buttons for
setup and programming. The front panel buttons along
with the dual-line display makes the Loop Leader easy
to set up & program. Three of these buttons are also
function keys that can be programmed to trigger certain
events (i.e. acknowledge alarms, reset max and/or
min, disable/enable output relays, or hold current relay
states), provide direct menu access points, and more.
One feature that makes the Loop Leaders particularly
easy to set up and program is that they can be scaled
without applying a calibrated or known input. The user
simply enters the desired values for Input 1 and Input 2
(for instance 4.000and 20.00 mA) andthe corresponding
display values for these inputs (for instance 0.0 and 2000.0)
 

All versions of these instruments are CE marked. The hazardous
area versions of these instruments are UL and C-UL Listed as
intrinsically safe and nonincendive and ATEX and IECEx Certified
for Intrinsic Safety in Hazardous Areas (Gas Atmospheres). These
versions are also UL and C-UL Listed under the UL 61010-1
General Safety Standard.
One of the most useful aspects of the hazardous area approvals is
that these instruments are approved by UL as nonincendive so they
can be installed in Division 2 areas with no additional protective
devices needed.


II 1G
Ex ia IIC T4 Ga
Ta = -40°C to +70°C
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

Ex ia IIC T4 Ga
Tamb = -40°C to +70°C 0518

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7
 

The Loop Leader, in combination with an ultrasonic level transmitter,
makes for an economical way to measure and display open channel
flow rate and total and take periodic samples in most weirs and
flumes. All the user needs to do is enter the exponent for the weir or
flume into the Loop Leader and the meter automatically raises the
input signal to that power. Sampling can be based on the total flow or
the grand total. For instance, to display open channel flow rate and
total from a 3 inch Parshall flume and take a one pint sample every
100,000 gallons, the user would program the Loop Leader as follows:

  
Open Channel
Flow 3" Parshall ume Set Programmable Exponent to 1.547
Flow Rate Millions of Gallons per
Day (MGD) Set 4 mA = 0 & 20 mA = 3.508 Time base = Day
Total Millions of Gallons Set Totalizer Conversion Factor = 1
(password protect total reset)
Non-Resettable
Grand Total Program meter so grand total can never be reset Set non-resettable grand total
Display Display Flow Rate and
Total at the same time Set upper display for Grand Total and lower display to toggle
between rate and total.
Sampling Take a 1 pint sample
every 100,000 gallons Set up relay for sampling and to trip every 0.1 million gallons. Set
up sampling time such that 1 pint
is sampled.
Preset = 0.100 (100,000 gallons)
0.100
Relay
LED
Total
0.200
0.300
Sample
Time Sample Time Sample Time
Total Relay Sampling Operation
󰀨
The Loop Leader can display flow rate and total by extracting the
square root from the 4-20 mA signal from a differential pressure
transmitter. The user selectable low-flow cutoff feature gives a
reading of zero when the flow rate drops below a user selectable
value.
• Display Flow Rate
• User Selectable
Low-Flow Cutoff
• Only 2 Calibration
Points Required
FLOW
See Our Complete Offering and
Enclosure Selection Utility
at www.predig.com/esu

Precision Digital offers a variety of rugged enclosures that provide
a high degree of protection against harsh operating environments.
Thermoplastic and stainless steel NEMA 4X, and painted steel
NEMA 4 enclosures for up to 10 Loop Leader meters are available.
NEMA 4X Enclosures
are Available in Plastic
and Stainless Steel;
NEMA 4 Enclosures in
Painted Steel
Low-Cost NEMA 4X
Enclosure

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8
 
▲ Connector Labeling for Fully Loaded Loop Leader


The connectors’ label, a󰀩xed to the meter, shows the location of all
connectors available with requested conguration.
Notes:
1. Panel cutout required: 1.772" x 3.622" (45 mm x 92 mm)
2. Panel thickness: 0.040 - 0.250" (1.0 mm - 6.4 mm)
3. Mounting brackets lock in place for easy mounting
4. Clearance: Allow 6" (152 mm) behind the panel

1.76"
(45mm)
0.59"
(15mm) 3.2"
(81mm)
2.45"
(62mm)
3.6"
(91mm)
4.68"
(119mm)
2.45"
(62mm)
▲Meter Dimensions - Side View
▲ Meter Dimensions - Front View



4-20 mA
Transmitter
Power
Supply
DI+ DI- mA- mA+ BL-X
4-20 mA
Transmitter
Power
Supply
DI+ DI- mA- mA+ BL-X

The following gures show a 4-20 mA loop connected to the meter.
The rst gure shows the connection without the backlight and
the second shows the connection with the backlight. The meter is
powered by the 4-20 mA current loop.
▲ 4-20 mA Input Connection without Backlight
▲ 4-20 mA Input Connection with Backlight
I+ I-
Power
Supply Device with
4-20 mA Input

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

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+.
DI+ DI- mA- mA+ BL-X
C NO C NO
Internal
Load Load
Relay connections are made to a
four-terminal connectors. Each relay’s
C terminal is common only to the
normally open (NO) contact of the
corresponding relay.


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9
 

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.
 On or O󰀨; user programmable, 8 characters
maximum. Displayed every 10 seconds for 1 second on bottom line.
 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).
 Top: 99999; Bottom: 99,999,999 (ashing)
 Top: -9999; Bottom: -9,999,999 (ashing)

II 1G, Ex ia IIC T4 Ga, Ta = -40°C to +70°C
Certificate number: CML 17ATEX2015X
 Ex ia IIC T4 Ga, Tamb = -40°C to +70°C
Certificate number: IECEx CML 17.0008X

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



IEC 61010-1:2010 (3rd Edition);
UL 61010-1, 3rd Edition;
CAN/CSA-C22.2 No. 61010-1-12, 3rd Edition;
 UL 50E

 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.
 Front panel & Free PC-based USB
programming software
 Enclosure: 1/8 DIN, IP65, NEMA 4X front
panel, high impact plastic, NORYL®polyphenylene ether & polystyrene
blend (PPE PS) resin, UL 94V-0, Color: gray, Gasket: silicone rubber,
Faceplate: LEXAN®polycarbonate (PC) film, Buttons: silicone rubber
 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.
 0.0 to 99.9% of full scale. Input signal changes
greater than bypass value are displayed immediately.
 Recalibration is recommended at least every 12
months.
 Max/min readings reached by the process are
stored until reset by the user or until power to the meter is turned off.
 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.
 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.
 64 dB at 50/60 Hz
 Removable screw terminals accept 12 to 22 AWG.
 2.1 VDC on contact. Connect normally
open contacts across DI+ and DI-
 Logic High: 2.4 to 30 VDC (max)
Logic Low: 0 to 0.9 VDC
 Screw terminal connectors: 4.5 lb-in (0.5 Nm)
Mounting screws: 8.0 lb-in max. (0.9 Nm)
 4.68" x 2.45" x 3.79"
(119 mm x 62 mm x 96 mm) (W x H x D)
 8.7 oz (247g) with option board
 3 years parts and labor

Except where noted all specifications apply to operation at +25°C.

 4-20 mA
 ±0.02% of span ±1 count, Square root and programmable
exponent: 10-100% FS
 Without backlight: 1.5 V maximum,
With backlight: 4.7 V maximum
 With backlight o: 75 Ω @ 20 mA
With backlight on: 225 Ω @ 20 mA
 Over current protection to 1 A maximum
Over voltage protection to 30 VDC max
(between mA+ and mA-/BL-)
 25 PPM/°C from -40 to 75°C ambient
 Linear, square root, or programmable exponent
󰀨 0.0 to 999,999.9
 Analog input will not interfere with existing
HART communications on the wired 4-20 mA signal.

 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 ash a user-dened message on
alarm condition.
 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)

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

Top line: Up to four decimal places
Bottom line: Up to seven decimal places and commas to indicate
1000s (e.g. 88,987,628)
The input can be displayed in di󰀨erent scales on
the top and bottom lines. For instance, the top line could display the
ow in GPM and the bottom line could display that same input in CFM.
 Red backlight, ashing display, alarm symbol (!)
Symbols are not available on bargraph models. Bargraph segment
flashes on alarm.
O1+ O1- O2+ O2-
5-30 VDC
90 mA MAX
Power Supply
External DC
Relay
+-
+
Alarm Indicator/
Pulse Counter
(e.g. PD6300)
-
Internal
See Control Drawing LIM6600-2
for information on hazardous area wiring
at www.predig.com/PD6626
!
O1+ O1- O2+ O2-
5-30 VDC
90 mA MAX
Power Supply
External DC
Relay
+-
+
Alarm Indicator/
Pulse Counter
(e.g. PD6300)
-
Internal