Precision Digital PD8-6262 User guide

PD8-6262 Explosion-Proof Dual Analog Input Rate/Totalizer

Instruction Manual

PRECISION DIGITAL CORPORATION

233 South Street • Hopkinton MA 01748 USA
Tel [phone] • Fax [phone]

www.predig.com

• Fully-Approved Explosion-Proof Dual Analog Input Flow Rate/Totalizers

• 0-20 mA, 4-20 mA, 0-5 V, 1-5 V, and ±10 V Inputs with ±0.03% Accuracy

• Dual Analog Inputs with Math Functions

• Rate, Total, and Grand Total for Each Input Channel

• Display Rate & Total at the Same Time

• Front Panel or Remote Total Reset

• Password Protection for Programming and Total Reset

• Total Stored in Non-Volatile Memory

• Dual-Line 6-Digit Display, 0.6" (15 mm) & 0.46" (12 mm)

• SafeTouch Through-Glass Button Programming

• Display Mountable at 0°, 90°, 180°, & 270°

• Isolated 24 VDC @ 25 mA Transmitter Power Supply

• Easy Field Scaling in Engineering Units without Applying an Input

• 4 Relays with Interlocking Capability + Isolated 4-20 mA Output Option

• Free PC-Based, On-Board, MeterView Pro USB Programming Software

• SunBright Display Standard Feature; Great for Outdoor Applications

• Operating Temperature Range: -40 to 60°C (-40 to 140°F)

• FM Approved as Explosion-Proof / Dust-Ignition-Proof / Flame-Proof

• CSA Certified as Explosion-Proof / Dust-Ignition-Proof / Flame-Proof

• ATEX and IECEx Certified as Flame-Proof

• Input Power Options: 85-265 VAC / 90-265 VDC or 12-24 VDC / 12-24 VAC

• 32-Point Linearization & Square Root Extraction

• Programmable Display, Function Keys & Digital Inputs

• Flanges for Wall or Pipe Mounting

• Explosion-Proof, IP68, NEMA 4X Die-Cast Aluminum Enclosure

• On-Board RS-485 Serial Communications

• Modbus RTU Communication Protocol Standard

• Four 3/4" NPT Threaded Conduit Openings (Two Plugs Installed)

• 3-Year Warranty

MeterView Pro

USB Install

2

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

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Disclaimer

The information contained in this document is
subject to change without notice. Precision Digital
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.
See Warranty Information and Terms &
Conditions on www.predig.com for complete
details.

• 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.

• Failure to follow installation guidelines could
result in death or serious injury. Make sure only
qualified personnel perform the installation.

• Never remove the meter cover in explosive
environments when the circuit is live.

• Cover must be fully engaged to meet
explosion-proof/dust-ignition-proof/flame-proof
requirements.

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.

© 2022 Precision Digital Corporation.
All rights reserved.

FREE MeterView Pro
Programming Software

The meter can be powered from the USB connection. When
using the USB connection, DO NOT apply AC or DC power to
the meter.

The easiest and quickest way to program your
ProtEX-MAX meter is to use the FREE MeterView Pro
programming software. This software is loaded into
the meter and connects and installs directly to your
PC with a USB cable. We recommend that the first
thing you do after taking the meter out of the box is
connect the ProtEX-MAX to your PC with the provided
USB cable – do not use a different cable. DO NOT
apply AC or DC power to the meter while your PC is
connected to the meter as it will disrupt the USB

connection. You don’t even have to apply an input

signal.
MeterView Pro programming software is intuitive, and

most customers can get their meter programmed as
they like without even looking in the manual.

Watch MeterView Pro Software Video at

www.predig.com/meterviewpro

In addition to programming, the software may be used
for:

• Monitoring

• Datalogging using your PC

• Generating and saving programming files for

later use

Once your meter is programmed the way you want it,
you can wire it up for your application per the
instructions in this manual and install it. If you find that
you need to make adjustments to the programming
after the meter is installed, you can use the front panel
buttons and the instructions in this manual to do so.

• When using the USB connection, the totalizer
should only be connected to a computer when
both devices are in a non-hazardous area.

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

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Table of Contents

Introduction ......................................................................................................... 7

Ordering Information .......................................................................................... 7

Key Features ....................................................................................................... 9

Specifications ................................................................................................... 13

General ................................................................................................ .......... 13

Dual Process Inputs ..................................................................................... 14

Dual Rate/Totalizer ....................................................................................... 15

Relays ............................................................................................................ 16

USB Connection ........................................................................................... 16

Isolated 4-20 mA Transmitter Output Option ............................................. 16

RS-485 Serial Communications .................................................................. 16

Modbus® RTU Serial Communications ....................................................... 16

Digital Input (F4) ........................................................................................... 17

Digital Inputs & Outputs .............................................................................. 17

MeterView Pro Software .............................................................................. 17

Compliance Information................................................................................... 17

Electromagnetic Compatibility .................................................................... 17

Product Ratings and Approvals .................................................................. 18

EU Declaration of Conformity .......................................................................... 19

Safety Information ............................................................................................ 19

Installation......................................................................................................... 19

Unpacking ..................................................................................................... 19

Mounting ....................................................................................................... 20

Installation Overview ........................................................................................ 22

MeterView Pro Software .............................................................................. 22

Transmitter Supply Voltage Selection (P+, P-) .......................................... 23

Connections ................................................................................................. 23

Required & Factory Wired Connection ....................................................... 23

PROVU Electronics Module Layout ............................................................. 24

USB Connection ........................................................................................ 24

Power Connections .................................................................................... 25

Signal Connections .................................................................................... 25

RS-485 Connections .................................................................................. 26

RS-485 Multi-Drop Connection .................................................................. 26

Digital I/O Connections .............................................................................. 27

F4 Digital Input Connections ...................................................................... 27

Remote Programming ................................................................................ 27

4-20 mA Output Connections ..................................................................... 27

Analog Output Transmitter Power Supply .................................................. 27

Relay Connections ..................................................................................... 28

Interlock Relay Feature .............................................................................. 28

Switching Inductive Loads.......................................................................... 28

Setup and Programming .................................................................................. 29

Overview ................................ ....................................................................... 29

LED Status Indicators .................................................................................. 29

Programming Buttons ................................................................................. 30

SafeTouch Buttons ...................................................................................... 30

Display Functions & Messages ................................................................... 31

Main Menu ..................................................................................................... 34

Setting Numeric Values ................................................................ ............... 34

Setting Up the Totalizer (setup) .................................................................. 35

Setting the Input Signal (Input) ................................................................. 36

Setting the Totalizer Features (total) ....................................................... 36

Setting the Rate, Total, & Grand Total Units/Tags (units) ........................ 36

Setting the Decimal Point (dEc pt) ........................................................... 37

Programming the Rate/Totalizer (prog) ..................................................... 37

Setting the Display Parameters & Intensity (dsplay) ................................. 40

Display Intensity (d-Inty).......................................................................... 40

Setting the Relay Operation (relay) .......................................................... 41

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

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Relay and Alarm Operation Diagrams ........................................................ 43

High Alarm Operation (Set > Reset) .............................................................. 43

Low Alarm Operation (Set < Reset) ........................................................... 43

High Alarm with Fail-Safe Operation (Set > Reset) .................................... 43

Low Alarm with Fail-Safe Operation (Set < Reset)..................................... 43

Time Delay Operation ................................................................................ 44

Total Relay Sampling Operation ................................................................ 44

Pump Alternation Control Operation .......................................................... 45

Relay Sampling Operation ......................................................................... 45

Relay Operation Details ............................................................................... 46

Overview .................................................................................................... 46

Relays Auto Initialization ............................................................................ 46

Fail-Safe Operation .................................................................................... 46

Front Panel LEDs ....................................................................................... 46

Latching and Non-Latching Relay Operation ............................................. 46

Non-Latching Relay (Auto) ........................................................................ 47

Non-Latching Relay with Manual Reset (A-nman) ...................................... 47

Latching Relay (LatcH) .............................................................................. 47

Latching Relay with Clear (Lt-Clr) ........................................................... 47

Acknowledging Relays ............................................................................... 48

Pump Alternation Control Applications (Altern) ....................................... 48

Setting Up the Interlock Relay (Force On) Feature .................................... 49

Scaling the 4-20 mA Analog Output (Aout) ................................................ 50

Reset Menu (reset) ...................................................................................... 50

Manual Control Menu (Contrl) ................................................................... 50

Setting Up the Password (pass) .................................................................. 51

Protecting or Locking the Totalizer Functions ............................................ 51

Total Reset Password & Non-Resettable Total ......................................... 51

Making Changes to a Password Protected Totalizer ................................. 51

Disabling Password Protection .................................................................. 51

Advanced Features Menu ............................................................................ 52

Advanced Features Menu & Display Messages ......................................... 52

Noise Filter (filter) ................................................................................. 54

Noise Filter Bypass (bypass) ..................................................................... 54

Rounding Feature (round) ......................................................................... 54

Modbus RTU Serial Communications (serial) ......................................... 54

Select Menu (SElect) ................................................................................ 55

Input Signal Conditioning (Functn) ............................................................ 55

Square Root Linearization (Square) .......................................................... 55

Programmable Exponent Linearization (Prog E) ................................ ....... 55

Multi-Point Linearization (Linear) ............................................................. 56

Math Function (nmath) ............................................................................... 56

Math Constants (Const)............................................................................. 56

Low-Flow Cutoff (CutofF) .......................................................................... 56

Totalizer Count Up/Down (Count) .............................................................. 57

Analog Output Programming (AoutPr) ...................................................... 58

Programmable Function Keys User Menu (user) ...................................... 59

Internal Calibration (ICAL).......................................................................... 61

Totalizer Operation ........................................................................................... 62

Button Operation .......................................................................................... 62

SafeTouch Buttons ...................................................................................... 62

Function Keys Operation ............................................................................. 63

Digital Inputs Operation ............................................................................... 63

Maximum/Minimum Readings ..................................................................... 63

Troubleshooting ............................................................................................... 64

Diagnostics Menu (diag) ............................................................................. 64

Testing the Display LEDs ........................................................................... 64

Determining Software Version ................................................................... 64

Reset Totalizer to Factory Defaults ............................................................ 64

Factory Defaults & User Settings ............................................................... 65

Troubleshooting Tips ................................................................................... 67

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

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Table of Figures

Figure 1. Enclosure Dimensions – Front View ............................................... 20

Figure 2. Enclosure Dimensions – Side Cross Section View ....................... 20

Figure 3. Transmitter Supply Voltage Selection ............................................ 23

Figure 4. Integrated PROVU Required Connections ....................................... 23

Figure 5. PROVU Electronics Module Layout .................................................. 24

Figure 6. USB Connection ............................................................................... 24

Figure 7. Power Connections .......................................................................... 25

Figure 8. 2-Wire Transmitters Powered by Internal Supply .......................... 25

Figure 9. 3-Wire Transmitters Powered by Internal Supply .......................... 25

Figure 10. Transmitter Powered by External Supply ..................................... 25

Figure 11. Self-Powered Transmitters ............................................................ 25

Figure 12. 2-Wire Voltage Input Connection .................................................. 25

Figure 13. 3-Wire Voltage Input Connection .................................................. 25

Figure 14. RS-485 Diagnostic LEDs ................................................................ 26

Figure 15. Three-Wire RS-485 Connection ..................................................... 26

Figure 16. Digital Input and Output Connections .......................................... 27

Figure 17. F4 Digital Input Connections ......................................................... 27

Figure 18. 4-20 mA Output Connections ........................................................ 27

Figure 19. Analog Output Supply Powering Other Devices .......................... 27

Figure 20. Relay Connections ......................................................................... 28

Figure 21. Interlock Connections .................................................................... 28

Figure 22. AC and DC Loads Protection ......................................................... 28

Figure 23. Low Voltage DC Loads Protection ................................................ 28

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

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Introduction

The ProtEX-MAX PD8-6262 is an explosion-proof
dual-input rate/totalizer ideal for flow rate, total, and
flow control applications. The totalizer features a
dual-line display, with a main display 0.60" (15 mm)
high, and a second display of 0.46" (12 mm) high
superluminous LED digits, which can be read in any
lighting condition, including direct sunlight. The
totalizer is housed in a die-cast aluminum,
field-mountable, NEMA 4X/IP68 rated enclosure for
convenient indoor and outdoor installation.

The meter accepts two inputs; either can be current or
voltage signals (e.g. 4-20 mA, 0-10 V) from analog
output flowmeters. The rates, as measured by the
flowmeters, are automatically aggregated into
cumulative totals and grand totals which can be
displayed with the rates.

Various math functions may be applied to the rate,
total, and grand total of the two channels, including
addition, difference, absolute difference, average,
weighted average, multiplication, division, minimum,
maximum, draw, ratio, and concentration. This is in
addition to the input signal conditioning functions
(linear, square root, programmable exponent, or
round horizontal tank calculations).

The displays, relays, and the analog output may be
assigned to the rate, total, or grand total of input
channels A or B, or math result channel C. Three of
the programming buttons can be set for custom
operation.

A fully loaded ProtEX-MAX PD8-6262 dual-input
rate/totalizer comes with four SPDT relays, a 4-20 mA
output, two 24 VDC power supplies, five digital inputs
and four digital outputs, and RS-485 serial
communications. The four relays can be used for
alarm indication or process control applications. The
4-20 mA isolated output, Modbus RTU serial
communications, and digital I/O features make the
ProtEX-MAX an excellent addition to any system.

Ordering Information

85-265 VAC Models

Model

Standard
Features

Options
Installed

PD8-6262-6H0

5 Digital Inputs,
4 Digital Outputs,
RS-485
Communications

No options

PD8-6262-6H7

4 relays
4-20 mA output

12-24 VDC Models

Model

Standard
Features

Options
Installed

PD8-6262-7H0

5 Digital Inputs,
4 Digital Outputs,
RS-485
Communications

No options

PD8-6262-7H7

4 relays
4-20 mA output

Accessories

Model

Description

PDA0001

3/4" M-NPT to F-M20 Reducer

PDA0002

3/4" M-NPT to 1/2" F-NPT Reducer

PDAPLUG75

3/4" Metal Conduit/Stopping Plug

PDA-SSTAG

Custom Stainless Steel Tag (see
website for convenient ordering form)

PDA6848

2" U-Bolt Kit Zinc Plated Steel

PDA6848-SS

2" U-Bolt Kit Stainless Steel

PDA7485-I

RS-232 to RS-485 isolated converter

PDA8485-I

USB to RS-485 isolated converter

SafeTouch Buttons

To make it possible to program and operate the
ProtEX-MAX in a hazardous area, the programming
buttons that are located behind the glass window can
be operated without removing the cover by using the
SafeTouch through-glass buttons. The operator puts
their finger on the glass over the button and the
button is actuated.

To learn more about SafeTouch buttons,
see this video:

predig.com/videos/Safetouch_Buttons

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

8

Helpful Videos

There are several videos that will help you get a
better understating of the features and functionality of
the ProtEX-MAX products. Since the ProtEX-MAX
meters have the same general features and
functionality of the ProVu meters, appropriate videos
for the ProVu meter are also included.

ProtEX-MAX Products Overview

Learn about the complete line of ProtEX-MAX
products.

predig.com/videos/ProtEXMAX_Overview

MeterView Pro Programming Software

Learn how easy it is to program the ProVu
(ProtEX-MAX) process meter using MeterView Pro
software.

predig.com/videos/MVPro_SW

MeterView Pro Software Demonstration

Learn how easy it is to program Precision Digital's
ProVu (ProtEX-MAX) process meter for a level
application using MeterView Pro PC-based
programming software.

predig.com/videos/MVPro_Demo

Connect to PC for Programming

Learn how to connect a ProVu (ProtEX-MAX) process
meter to your PC and install free MeterView Pro
programming software.

predig.com/videos/PC_Connect

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

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Key Features

Connections for PD8-6262-6H7 & PD8-6262-7H7

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

10

Physical Features

The ProtEX-MAX is designed for ease-of-use in safe
and hazardous applications. The ProtEX-MAX is
housed in a rugged NEMA 4X explosion-proof
enclosure, can operate over a wide temperature
range, includes removable screw terminal connectors,
has worldwide approvals for use in hazardous areas,
and features through-glass buttons for easy controller
operation without the need to remove the cover.
All of these features are backed by a 3-year warranty.

Super-Bright LED Display

The ProtEX-MAX features a dual-line 6-digit display
with super-bright LEDs, our brightest ever. These
allow the display to be read in any lighting condition,
even in direct sunlight.

SafeTouch Through-Glass Buttons

The ProtEX-MAX is equipped with four sensors that
operate as through-glass buttons so that it can be
programmed and operated without removing the
cover (and exposing the electronics) in a hazardous
area. These buttons can be disabled for security by
selecting the DISABLE setting on the NO-CONTACT
BUTTONS switch located on the back of the
electronics module, inside the enclosure.

Rugged, Heavy-Duty Enclosure

The ProtEX-MAX is housed in a rugged NEMA 4X, 7,
& 9, IP68 die-cast aluminum enclosure, designed to
withstand harsh environments in safe and hazardous
areas over a wide temperature range.

Wide Viewing Angle

Customers can’t always look at the display from

straight on, so the window and display module have
been optimized to provide a wide viewing angle of
approximately ±40°; nearly twice that of the
competition.

Built-In Mounting Flanges

The ProtEX-MAX is equipped with four slotted flanges
for wall mounting or NPS 1½" to 2½" or DN 40 to
65 mm pipe mounting.

Flexible Mounting & Wiring

The ProtEX-MAX features four ¾" NPT threaded
conduit openings so that wiring can be routed to the
most convenient conduit connection(s). Two ¾" NPT
metal conduit plugs with 12 mm hex key fitting come
installed.

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

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Rotatable Display

The ProtEX-MAX rotatable display, along with four
available conduit connections, provide for numerous
installation options. The display can be rotated in 90°
increments. Rotate it 90° for horizontal mounting.

Vertical Mounting Horizontal Mounting

Perfect & Secure Fit Every Time

The internal cast rails ensure the ProtEX-MAX
assembles together perfectly, quickly and securely;
and everything lines up for optimal viewing every
time. There are no standoffs to worry about breaking
or getting out of alignment. Two spring-loaded,
self-retaining, thumbscrews make the assembly a
snap, while pressing the display as close to the
glass as possible to improve wide angle viewing.

Stainless Steel Tags

PDA-SSTAG is a laser etched stainless steel tag
accessory for any of your Precision Digital meters.
The tag features custom text for equipment
identification, instruction, or whatever else is needed
in your facility. Each tag comes with a stainless steel
wire and lead seal for easy mounting wherever you
need it.

Removable Screw Terminals

Industrial applications require screw terminal
connections for easy field wiring, and the
ProtEX-MAX goes one step further in convenience
by also making them removable.

Note: The above photograph is representative of the back of
the PD8-6262 in every regard except for the input signal
connector. See Figure 5 on page 24 for actual input signal
connections.

USB Port MeterView Pro

Hazardous Area Approvals

The ProtEX-MAX's approvals allow it to be used in
hazardous areas around the world. These include: FM
Approved as Explosion-Proof / Dust-Ignition-Proof /
Flame-Proof, CSA Certified as Explosion-Proof /
Dust-Ignition-Proof, and ATEX and IECEx Certified as
Flame-Proof.

Wide Operating Temperature Range

The ProtEX-MAX can operate from -40 to 60°C
(-40 to 140°F) meaning it can be installed in a wide
variety of indoor and outdoor industrial applications.
And over this range, the ProtEX-MAX will drift no
more than 0.005% of calibrated span/°C max from
0 to 65°C ambient and 0.01% of calibrated span/°C
max from -40 to 0°C ambient.

USB cable conveniently

plugs into side of

ProtEX-MAX meter

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

12

Useful Tools

PD9501 Multi-Function Calibrator

This PD9501 Multi-Function Calibrator has a variety
of signal measurement and output functions, including
voltage, current, thermocouple, and RTD.

PD9502 Low-Cost Signal Generator

The PD9502 is a low-cost, compact, simple to use
4-20 mA or 0-10 VDC signal generator. It can easily
be set for 0-20 mA, 4-20 mA, 0-10 V or 2-10 V
ranges. Signal adjustment is made with a one-turn
knob. A 15-27 VDC wall plug is provided with the
instrument. Optional USB power bank is available.

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

13

Specifications

Except where noted all specifications apply to
operation at +25°C.

General

Display

Display Line 1: 0.60" (15 mm) high,
red LEDs

Display Line 2: 0.46" (12 mm) high,
red LEDs

6 digits each (-99999 to 999999),
with lead zero blanking

Display
Intensity

Eight user selectable intensity levels.
Default value is six.

Display
Update Rate

5/second (200 ms)

LED Status
Indicators

See LED Status Indicators on page 29 for
details.

Overrange

Display flashes 999999

Underrange

Display flashes -99999

Display
Assignment

Display lines 1 & 2 may be assigned to show:

• One or more rate channels: Channel A
(Ch-A), B (Ch-B), or C (Ch-C)

• Toggle between rate channels: Ch-A &
Ch-B, Ch-A & Ch-C, Ch-B & Ch-C, and
Ch-A, Ch-B, & Ch-C

• Total or grand total: Ch-A or Ch-B

• Rate and total or grand total: Ch-A, Ch-B

• Relay set points

• Max/min values: Ch-A, Ch-B, or Ch-C

• Toggle between any rate channel & units

• Total and units: Ch-A or Ch-B

• Toggle between totals: Ch-A & Ch-B;

Ch-A, Ch-B, and sum of Ch-A and Ch-B

• Modbus input

Line 2 may also be set to show engineering
units or be off, with no display.

Programming
Methods

Four SafeTouch through-glass buttons when
cover is installed. Mechanical buttons can
be used with the cover removed. Free
PC-based USB MeterView Pro programming
software.

Noise Filter

Programmable from 2 to 199
(0 will disable filter)

Filter Bypass

Programmable from 0.1 to 99.9% of
calibrated span

Recalibration

All ranges are calibrated at the factory.
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 totalizer is turned off.

Rounding

Select 1, 2, 5, 10, 20, 50, or 100
(e.g. rounding = 10, value = 123.45,

display = 123.50).

Password

Three programmable passwords restrict
modification of programmed settings and
two prevent resetting the totals.
Pass 1: Allows use of function keys and
digital inputs
Pass 2: Allows use of function keys, digital
inputs and editing set/reset points
Pass 3: Restricts all programming, function
keys, and digital inputs.
Total: Prevents resetting the total manually
Gtotal: Prevents resetting the grand total
manually

Non-Volatile
Memory

All programmed settings are stored in
non-volatile memory for a minimum of ten
years if power is lost.

Power
Options

85-265 VAC 50/60 Hz; 90-265 VDC, 20 W max;
12-24 VDC, 12-24 VAC, 15 W max.
Powered over USB for configuration only.

Fuse

Required external fuse: UL Recognized, 5 A
max, slow blow; up to 6 totalizers may share
one 5 A fuse

Normal Mode
Rejection

Greater than 60 dB at 50/60 Hz

Isolation

4 kV input/output-to-power line
500 V input-to-output or output-to-P+ supply

Overvoltage
Category

Installation Overvoltage Category II:
Local level with smaller transient
overvoltages than Installation Overvoltage
Category III.

Environmental

T6 Class operating temperature range
Ta = -40 to 60°C
T5 Class operating temperature range
Ta = -40 to 65°C

Storage temperature range:

-40 to 85°C (-40 to 185°F)
Relative humidity:

0 to 90% non-condensing

Max Power
Dissipation

Maximum power dissipation limited to

15.1 W

Connections

Power, signal, relays, mA out: Removable
screw terminal blocks accept 12 to 22 AWG
wire.

RS-485: Removable screw terminal block
accepts 16 to 30 AWG wire.

Digital I/O: Removable screw terminal
blocks accept 16 to 30 AWG wire.

Enclosure

Explosion-proof die-cast aluminum with
glass window, corrosion resistant epoxy
coating, color: blue

NEMA 4X, 7, & 9, IP68
Default conduit connections: Four ¾" NPT

threaded conduit openings and two ¾" NPT
metal conduit plugs with 12 mm hex key
fitting installed. Additional conduit opening
configurations may be available; verify
quantity and sizes on specific device
labeling during installation.

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

14

Mounting

Wall Mounting:
Four (4) mounting holes provided for
mounting totalizer to wall. See Wall Mounting
Instructions on page 20 for additional details.

Pipe Mounting:
Optional pipe mounting kit (PDA6848)
allows for pipe mounting. Sold separately.
See Pipe Mounting Instructions on page 21
for additional details.

Tightening
Torque

Power, signal, relays, mA out terminals:
5 lb-in (0.56 Nm)

Digital I/O and RS-485:

2.2 lb-in (0.25 Nm)

Overall
Dimensions

6.42" x 7.97" x 8.47" (W x H x D)
(163 mm x 202 mm x 215 mm)

Weight

16.0 lbs (7.26 kg)

Warranty

3 years parts & labor. See Warranty
Information and Terms & Conditions on

www.predig.com for complete details.

Dual Process Inputs

Two Inputs

Two non-isolated inputs, each separately
field selectable:
0-20, 4-20 mA, 10 V (0-5, 1-5, 0-10 V),
Modbus PV (Slave)

Isolated
Transmitter
Power Supply

Terminals P+ & P-: 24 VDC ± 10%.
Isolated from the input at >500 V. Jumper

selectable for 24, 10, or 5 VDC supply
(internal jumper J4). All models transmitter
supply rated @ 25 mA max.

Refer to Transmitter Supply Voltage
Selection (P+, P-) on page 23.

Channels

Channel A, Channel B,
Channel C (Math channel)

Programmable
Constants

Constant P (Adder):

-99.999 to 999.999, default: 0.000

Constant F (Factor):

0.001 to 999.999, default: 1.000

Math
Functions

Name

Function

Setting

Addition

(A+B+P)*F

Sunm

Difference

(A-B+P)*F

diF

Absolute diff.

((Abs(A-B))+P)*F

diFAbS

Average

(((A+B)/2)+P)*F

AVG

Multiplication

((A*B)+P)*F

nmulti

Division

((A/B)+P)*F

diVide

Max of A or B

((AB-Hi)+P)*F

Hi-Ab

Min of A or B

((AB-Lo)+P)*F

Lo-Ab

Draw

((A/B)-1)*F

drAuw

Weighted avg.

((B-A)*F)+A

uw avg

Ratio

(A/B)*F

ratio

Ratio 2

((B-A)/A)+P)*F

ratio2

Concentration

(A/(A+B))*F

Concen

Total Addition

(tA+tB+P)*F

Sunm t

G. Tot. Addition

(GtA+GtB+P)*F

SunmGT

Total
Difference

(tA-tB+P)*F

Dif GT

G. Tot.
Difference

(GtA-GtB+P)*F

Dif GT

Total Ratio

(tA/tB)*F

Tratio

Total Ratio 2

((tB-tA)/tA)*F

t-rat2

Total Percent

(tA/(tA+tB))*100

T PCT

Note: The F constant can be any value from

0.001 to 999.999. If the value is less than 1,
it will have the same effect as a divider. For
example, the average could also be derived
by using (A+B)*F, where F = 0.500.

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

15

Sequence of
Operations
for Input
Programming

1. Select Input for A and B

2. Set up the rate, total, and grand total
engineering units for channels A & B,
and units for math channel C

3. Set up rate, total, and grand total
decimal points for channels A & B,
and decimal point for math channel C

4. Program channel A & B rate
parameters

5. Program channel A & B total and reset
parameters

6. Set up display lines 1 and 2

7. Select the transfer function for A & B
(e.g. Linear)

8. Select Math function for Channel C

9. Program constants for Factor (F) and
Adder (P).

10. Program cutoff values for A and B

Accuracy

±0.03% of calibrated span ±1 count,
square root & programmable exponent
accuracy range: 10-100% of calibrated
span

Temperature
Drift

0.005% of calibrated span/C max from

0 to 65C ambient, 0.01% of calibrated
span/C max from -40 to 0C ambient

Input Signal
Conditioning

Linear, square root, or programmable
exponent

Multi-Point
Linearization

2 to 32 points for channel A and B

Programmable
Exponent

User selectable from 1.0001 to 2.9999 for
open channel flow

Low-Flow
Cutoff

0.1 to 999,999 (0 disables cutoff function).

Point below at which the display always
shows zero.

Decimal Point

Up to five decimal places or none:
d.ddddd, d.dddd, d.ddd, d.dd, d.d, or dddddd

Calibration
Range

Input Range

Minimum Span
Input 1 & 2

4-20 mA

0.15 mA

10 V

0.10 V

An error message will appear if the input 1
and input 2 signals are too close together.

Input
Impedance

Voltage ranges: greater than 500 k
Current ranges: 50 - 100  (depending on

resettable fuse impedance)

Input
Overload

Current input protected by resettable fuse,
30 VDC max. Fuse resets automatically
after fault is removed.

HART
Incompatible

The totalizer will interfere with HART
signals when present on both analog
inputs. It is recommended a single-channel
totalizer be used to support the use of
HART devices in both analog input loops.

Dual Rate/Totalizer

Rate Display
Indication

-99999 to 999999, lead zero blanking.

Total Display
& Total
Overflow

0 to 999,999; automatic lead zero
blanking.
Up to 999,999,999 with total-overflow

feature. “oF” is displayed to the left of total
overflow and ▲ LED is illuminated.

Total
Decimal Points

Up to five decimal places or none:
d.ddddd, d.dddd, d.ddd, d.dd, d.d, or dddddd
Total decimal point is independent of rate
decimal point. Channel A and B decimal
points programmed independently.

Dual Totalizer

Calculates total for channels A and B
based on rate and field programmable
multiplier to display total in engineering
units. Time base must be selected
according to the time units in which the
rate is displayed. Channel A and B
totalizer parameters programmed
independently.

Totalizer
Rollover

Totalizer rolls over when display exceeds
999,999,999. Relay status reflects
display.

Total
Overflow
Override

Program total A or B total reset for
automatic with 0.1 second delay and set
point 1 for 999,999

Totalizer
Presets

Four, user selectable under setup menu.
Any set point can be assigned to channel
A or B total or grand total (or C) and may
be programmed anywhere in the range of
the totalizer for total alarm indication.

Total Reset
Password

Total and grand total passwords may be
entered to prevent resetting the totals or
grand totals from the front panel.

Total & Grand
Total Reset

Via front panel button, external contact
closure on digital inputs, automatically via
user selectable preset value and time
delay, or through serial communications.
Channel A and B total and grand total
reset parameters programmed
independently.

Programmable
Delay
On Release

0.1 and 999.9 seconds; applied to the

first relay assigned to total or grand total.
If the totalizer is programmed to reset
total to zero automatically when the
preset is reached, then a delay will occur
before the total is reset.

Non-Resettable
Total

The grand totals can be programmed as
non-resettable totals by entering the
password “050873”. Both channels are
set to non-resettable when this password
is entered.

Non-Volatile
Memory

Total and Grand Total values are stored
in non-volatile memory for a minimum of
ten years if power is lost.

• Once the Grand Total has been programmed as

“non-resettable” the feature CANNOT be disabled.

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

16

Relays

Rating

4 SPDT (Form C) internal and rated
3 A @ 30 VDC and 125/250 VAC resistive
load; 1/14 HP (≈ 50 W) @ 125/250 VAC for
inductive loads

Noise
Suppression

Noise suppression is recommended for each
relay contact switching inductive loads; see
Switching Inductive Loads page on page 28
for details.

Relay
Assignment

Relays may be assigned to channel A or B
rate, total, or grand total; channel C; or
Modbus control.

Deadband

0-100% of span, user programmable

High or Low
Alarm

User may program any alarm for high or low
trip point. Unused alarm LEDs and relays
may be disabled (turn off).

Relay
Operation

• Automatic (non-latching) and/or manual

reset

• Latching (requires manual

acknowledge) with or without clear

• Pump alternation control (2-4 relays)

• Sampling (based on set point and time)

• Off (disable unused relays and enable

Interlock feature)

• Manual on/off control mode

Relay Reset
(Acknowledge)

User selectable via front panel button,
F4 digital input, external contact closure on
digital inputs, or through serial
communications.

1. Automatic reset only (non-latching),
when the input passes the reset point.

2. Automatic + manual reset at any time
(non-latching)

3. Manual reset only, at any time
(latching)

4. Manual reset only after alarm condition
has cleared (L)

Note: Front panel button, F4 terminal at
back of totalizer or digital input may be
assigned to acknowledge relays
programmed for manual reset.

Time Delay

0 to 999.9 seconds, on & off relay time delays.
Programmable and independent for each relay

Fail-Safe
Operation

Programmable and independent for each
relay.

Note: Relay coil is energized in non-alarm
condition. In case of power failure, relay will
go to alarm state.

Auto
Initialization

When power is applied to the totalizer, relays
will reflect the state of the input to the
totalizer.

USB Connection

Function

Programming only

Compatibility

USB 2.0 Standard, Compliant

Connector
Type

Micro-B receptacle

Cable

USB A Male to Micro-B Cable

Driver

Microsoft® Windows® XP/Vista/7/8/10

Power

USB port provides power to the totalizer.

DO NOT apply AC or DC power to the
totalizer while the USB port is in use.

Isolated 4-20 mA Transmitter Output Option

Output
Source

Input channels A or B, rate, total, or grand
total; channel C; max or min for channel A
or B; highest or lowest max or min of A and
B; set points 1-4; Modbus input; or manual
control mode

Scaling
Range

1.000 to 23.000 mA for any display range

Calibration

Factory calibrated:

4.000 to 20.000 = 4-20 mA output

Analog Out
Programming

23.000 mA maximum for all parameters:

Overrange, underrange, max, min, and
break

Accuracy

± 0.1% of span ± 0.004 mA

Temperature
Drift

0.4 µA/C max from 0 to 65C ambient,

0.8 µA/C max from -40 to 0C ambient

Note: Analog output drift is separate from
input drift.

Isolated
Transmitter
Power Supply

Terminals I+ & R: 24 VDC  10%.
Used to power the 4-20 mA output.

All models rated @ 25 mA max.

External Loop
Power Supply

35 VDC maximum

Output Loop
Resistance

Power supply

Minimum

Maximum

24 VDC

10 

700 

35 VDC
(external)

100 

1200 

RS-485 Serial Communications

Compatibility

EIA-485

Connectors

Removable screw terminal connector

Max Distance

3,937' (1,200 m) max

Status
Indication

Status Indication / Separate LEDs for
Power (METER LINK), Transmit (TX), and
Receive (RX)

Modbus® RTU Serial Communications

Slave Id

1 – 247 (Meter address)

Baud Rate

300 – 19,200 bps

Transmit
Time Delay

Programmable between 0 and 199 ms

Data

8 bit (1 start bit, 1 or 2 stop bits)

Parity

Even, Odd, or None with 1 or 2 stop bits

Byte-To-Byte
Timeout

0.01 – 2.54 second

Turn Around
Delay

Less than 2 ms (fixed)

Note: Refer to the ProtEX-MAX Modbus Register Tables
located at www.predig.com for details.

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

17

Digital Input (F4)

Function

Remote operation of front-panel buttons,
acknowledge/reset relays, reset totals,
reset max/min values. See Function Keys &
Digital I/O Available Settings on page 60 for
a complete list of capabilities.

Contacts

3.3 VDC on contact. Connect normally

open contacts across F4 to COM

Logic Levels

Logic High: 3 to 5 VDC
Logic Low: 0 to 1.25 VDC

Digital Inputs & Outputs

Function

Terminals provided for remote operation of
all four programming / operation buttons.
Other uses include acknowledge/reset
relays, reset totals, and reset max/min
values. See Function Keys & Digital I/O
Available Settings on page 60 for a
complete list of capabilities.

Channels

4 digital inputs & 4 digital outputs

Digital Input
Logic High

3 to 5 VDC

Digital Input
Logic Low

0 to 1.25 VDC

Digital Output
Logic High

3.1 to 3.3 VDC

Digital Output
Logic Low

0 to 0.4 VDC

Source
Current

10 mA maximum output current

Sink Current

1.5 mA minimum input current

+5 V Terminal

To be used as pull-up for digital inputs only.
Connect normally open push buttons
across +5 V & DI 1-4.

• DO NOT use +5 V terminal to power external
devices.

MeterView Pro Software

Availability

Download directly from totalizer or from

www.predig.com/download_software

System
Requirements

Microsoft® Windows® XP/Vista/7/8/10

Communications

USB 2.0 (for programming only)
(USB A Male to Micro-B Cable)

RS-485 to USB converter
(programming, monitoring, and data
logging)

Configuration

Configure totalizers one at a time

Power

USB port provides power to the
totalizer. DO NOT apply AC or DC

power to the totalizer while the USB
port is in use.

Compliance Information

Electromagnetic Compatibility

Emissions

EN 55022
Class A ITE emissions requirements

Radiated
Emissions

Class A

AC Mains
Conducted
Emissions

Class A

Immunity

EN 61326-1
Measurement, control, and laboratory
equipment
EN 61000-6-2
EMC heavy industrial generic
immunity standard

RFI - Amplitude
Modulated

80 -1000 MHz 10 V/m 80% AM (1 kHz)

1.4 - 2.0 GHz 3 V/m 80% AM (1 kHz)

2.0 - 2.7 GHz 1 V/m 80% AM (1 kHz)

Electrical Fast
Transients

±2kV AC mains, ±1kV other

Electrostatic
Discharge

±4kV contact, ±8kV air

RFI ­Conducted

10V, 0.15-80 MHz, 1kHz 80% AM

AC Surge

±2kV Common, ±1kV Differential

Surge

1KV (CM)

Power­Frequency
Magnetic Field

30 A/m 70%V for 0.5 period

Voltage Dips

40%V for 5 & 50 periods
70%V for 25 periods

Voltage
Interruptions

<5%V for 250 periods

Note: Testing was conducted on meters with cable shields
grounded at the point of entry representing installations
designed to optimize EMC performance.

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

18

Product Ratings and Approvals

FM

Enclosure: Type 4X; IP66
Class I, Division 1, Groups B, C, D
Class II, Division 1, Groups E, F, G
Class III, Division 1, T5/T6
Class I, Zone 1, AEx d, IIC Gb T5/T6
Zone 21, AEx tb IIIC T90°C; Ta = -40°C to +65°C
T6 Ta = -40°C to +60°C; T5 Ta = -40°C to +65°C
Certificate Number: 3047283

CSA

Class I, Division 1, Groups B, C, D
Class II, Division 1, Groups E, F, G
Class III, Division 1
Class I Zone 1 Ex d IIC
Zone 21 Ex tb IIIC T90°C

-40°C < Tamb. < +60° C; Temperature Code T6

-40°C < Tamb. < +65° C; Temperature Code T5
Enclosure Type 4X & IP68
Certificate Number: 2531731

ATEX

II 2 G D

Ex d IIC T* Gb
Ex tb IIIC T90°C Db IP68
Ta = -40°C to +*°C
*T6 = -40°C to +60°C
*T5 = -40°C to +65°C
Certificate number: Sira 12ATEX1182

IECEx

Ex d IIC T* Gb
Ex tb IIIC T90°C Db IP68
Ta = -40°C to +*°C
*T6 = -40°C to +60°C
*T5 = -40°C to +65°C
Certificate Number: IECEx SIR 12.0073

Special Conditions for Safe Use:

Use suitably certified and dimensioned cable entry
device and/or plug. The equipment shall be installed
such that the supply cable is protected from
mechanical damage. The cable shall not be subjected
to tension or torque. If the cable is to be terminated
within an explosive atmosphere, then appropriate
protection of the free end of the cable shall be
provided. Cable must be suitable for 90°C.

Year of Construction

This information is contained within the serial number
with the first four digits representing the year and
month in the YYMM format.

For European Community: The ProtEX-MAX must
be installed in accordance with the ATEX directive
94/9/EC, and the product certificate Sira
12ATEX1182.

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

19

EU Declaration of

Conformity

EU Declaration of Conformity is available in the
Documentation CD provided with the product under
the EU DoC menu.

Safety Information

• Read complete instructions prior to installation
and operation of the totalizer.

• Risk of electric shock or personal injury.

• Hazardous voltages exist within enclosure.

Installation and service should be performed only
by trained service personnel.

Installation

Install in accordance with applicable local and
national regulations (e.g. NEC).

For Installation in USA
The ProtEX-MAX must be installed in accordance
with the National Electrical Code (NEC) NFPA

70.

For Installation in Canada

The ProtEX-MAX must be installed in accordance
with the Canadian Electrical Code CSA 22.1. All
power supplies below 36 V and input circuits
must be derived from a CSA Approved Class 2
source.

For European Community

The ProtEX-MAX must be installed in accordance
with the ATEX directive 94/9/EC and the product
certificate Sira 12ATEX1182.

• Disconnect from supply before opening
enclosure.

• Keep cover tight while circuits are live.

• Conduit seals must be installed within 18"

(450mm) of the enclosure or within 2" (50mm)
for Zone installations.

Wiring connectors are accessed by opening the
enclosure. To access electrical connectors,
remove the 2 captive screws and then remove
the electronics module. Connectors are on the
rear of the electronics module.

Unpacking

Remove the totalizer from box. Inspect the
packaging and contents for damage. Report
damages, if any, to the carrier.

If any part is missing or the totalizer malfunctions,
please contact your supplier or the factory for
assistance.

Pre-Installed Conduit Plugs

The ProtEX-MAX is supplied with two pre-installed
conduit plugs for installations that do not require the
use of all four conduit entries. The conduit/stopping
plugs include an internal hexagonal socket recess for
removal. The conduit plugs and their factory
installation are included in all hazardous area
approvals of this product.

• In hazardous areas, conduit and conduit/stopping
plugs require the application of non-setting
(solvent free) thread sealant. It is critical that all
relevant hazardous area guidelines be followed
for the installation or replacement of conduit or
plugs.

Cover Jam Screw

The cover jam screw should be properly installed
once the totalizer has been wired and tested in a safe
environment. The cover jam screw is intended to
prevent the removal of the totalizer cover in a
hazardous environment without the use of tools.
Using a M2 hex wrench, turn the screw clockwise until
the screw contacts the totalizer. Turn the screw an
additional 1/4 to 1/2 turn to secure the cover.

• Excess torque may damage the threads, screw
head, and wrench.

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

20

Mounting

The ProtEX-MAX has four slotted mounting flanges
that may be used for pipe mounting or wall mounting.
Refer to Figure 1 and Figure 2 below.

• Do not attempt to loosen or remove flange bolts
while the totalizer is in service.

Mounting Dimensions

All units: inches (mm)

Figure 1. Enclosure Dimensions – Front View

Figure 2. Enclosure Dimensions –

Side Cross Section View

Wall Mounting Instructions

The totalizer can be mounted to any wall or flat
surface using the four provided mounting holes
located in the cast-in flanges. In addition, the internal
electronic assembly can be rotated to allow the
enclosure to be mounted in any position. To mount
the totalizer to a wall, follow these instructions:

• Prepare a section of wall approximately
7" x 8.5" (178 mm x 216 mm) for totalizer
mounting by marking with a pencil the
mounting holes (shown in Figure 1) on the
wall.

• Select the appropriate mounting screws for the

mounting surface to be used. The mounting
holes diameter is shown on Figure 1.

Note: Mounting screws are not included.

• Using a drill bit slightly smaller than the girth
of the mounting screws, pre-drill holes at the
mounting locations previously marked.

• Insert mounting screws into the four mounting
holes and screw them into the pre-drilled
holes.

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

21

Pipe Mounting Instructions

The totalizer can also be mounted to a pipe using an
optional U-Bolt kit. This kit includes two U-bolts, the
necessary hardware, and is available in zinc plated
steel (PDA6848) and 316 stainless steel
(PDA6848-SS).

To mount the totalizer using a U-Bolt kit, follow these
instructions:

• Orient the groove on the back of the
instrument with the pipe and secure it to the
pipe with the two U-bolts and hardware
provided.

Vertical Pipe Mounting

Horizontal Pipe Mounting

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

22

Installation Overview

We recommend the following sequence for getting the
totalizer into service:

1. DO NOT apply AC or DC power to the totalizer.

2. Connect the totalizer to the PC with the USB
cable provided. DO NOT use a different USB
cable.

3. If MeterView Pro (MVPro) is already installed in
your computer, then the program will launch
automatically in most systems. If the program
does not start automatically, double-click on the
MVPro icon.

4. If MVPro is not installed, follow the instructions
provided below.

5. Use MVPro to configure the totalizer for your
application.

6. Disconnect the USB cable from the totalizer.

7. Apply power and signal and check operation of
the totalizer.

8. Install the totalizer and put into service.

9. Make any programming adjustments using the
front panel buttons.

MeterView Pro Software

The easiest and quickest way to program your
ProtEX-MAX totalizer is to use the FREE MeterView
Pro programming software. This software is loaded
into the totalizer and connects and installs directly to
your PC with the USB cable provided. DO NOT use a
different USB cable. We recommend that the first
thing you do after taking the totalizer out of the box is
connect the ProtEX-MAX to your PC with the provided
USB cable. DO NOT apply AC or DC power to the
totalizer while your PC is connected to the totalizer as
it will disrupt the USB connection. It is not necessary
to apply an input signal.

MeterView Pro programming software is intuitive, and
most customers can get their totalizer programmed as
they like without even looking in the manual.

Watch Meterview Pro Software Video at

www.predig.com/meterviewpro

MeterView Pro Installation

1. Connect one end of the provided USB cable

to the totalizer and the other end to the
computer. The computer will automatically
install the driver software it needs to talk to
the totalizer. Follow the on-screen
instructions and allow sufficient time for the
process to complete. This can take a few
minutes. If the process is interrupted, then it
could leave the system in an unstable
condition.

• Only one totalizer may be connected at a time.
Attaching multiple totalizers will cause a conflict
with the totalizer software.

• DO NOT apply AC or DC power to the totalizer
when using the USB connection.

• When using the USB connection, the totalizer
should only be connected to a computer when
both devices are in a non-hazardous area.

2. Once the driver is installed, an AutoPlay
dialog should appear for the drive

“MAINSTAL.” Click “Open folder to view

files.”

If the computer does not display an AutoPlay

dialog for the drive “MAINSTAL,” you should

open My Computer and double-click on the
drive labeled “MAINSTAL.”

3. Double-click on the file named “MAStart.”
The program will open a few windows and
install two programs on your computer.
Simply follow the on-screen instructions until
you see one of the dialogs below. If you

receive a “User Account Control” warning,

click “Yes.”

4. If there is an update available, click the

“Update” button to install the new version.

Otherwise, click “Configure” to begin

programming your totalizer.

Note: If you decide to update your MeterView Pro
software, once the installation has completed, you will be
asked if you want to update the setup files located on the
totalizer itself. This way, you will always have the most
current version on the totalizer for future installs.

• DO NOT unplug the totalizer while the new
installation files are being written to it. The
totalizer will display uwrite during the process
and you will receive an on-screen notification
once the process is complete.

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

23

Transmitter Supply Voltage Selection (P+, P-)

All totalizers, including models equipped with the
12-24 VDC power option, are shipped from the factory
configured to provide 24 VDC power for the
transmitter or sensor.

If the transmitter requires 5 or 10 VDC excitation, the
internal jumper J4 must be configured accordingly.

To access the voltage selection jumper:

1. Remove all the wiring connectors.

2. Unscrew the back cover.

3. Slide out the back cover by about 1 inch.

4. Configure the J4 jumper, located behind the
input signal connector, for the desired
excitation voltage as shown.

Figure 3. Transmitter Supply Voltage Selection

Connections

All connections are made to removable screw
terminal connectors located at the rear of the
totalizer.

• Use copper wire with 60°C or 60/75°C insulation
for all line voltage connections. Observe all safety
regulations. Electrical wiring should be performed
in accordance with all applicable national, state,
and local codes to prevent damage to the
totalizer and ensure personnel safety.

• Observe all safety regulations. Electrical wiring
should be performed in accordance with all
agency requirements and applicable national,
state, and local codes to prevent damage to the
totalizer and ensure personnel safety.

• Static electricity can damage sensitive
components.

• Observe safe handling precautions for
static-sensitive components.

• Use proper grounding procedures/codes.

• If the instrument is installed in a high voltage

environment and a fault or installation error
occurs, high voltage may be present on any lead
or terminal.

• Follow all fusing and wiring precautions
requirements for the instrument integrated to the
PD8 Series model number being connected.

To access the connectors, remove the enclosure
cover and unscrew the two captive screws that fasten
the electronics module. Signal connections are made
to de-pluggable connectors on the back of the
electronics module.

Some connectors may be provided already
connected. These connections are required for proper
operation of the ProtEX-MAX, and should not be
removed unless instructed to by this manual.

Wires marked as being used for testing purposes
should be removed.

Grounding connections are made to the two ground
screws provided on the base – one internal and one
external.

After all connections have been completed and
verified, apply power to the unit.

Required & Factory Wired Connection

The ProtEX-MAX comes with a pre-wired connection.
This connection is detailed below and must be
maintained in order for the instrument to function
properly.

Figure 4. Integrated PROVU Required Connections

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

24

PROVU Electronics Module Layout for PD8-6262-6H7 and PD8-6262-7H7*

* For models PD8-6262-6H0 and PD8-6262-7H0, the upper set of connectors (RELAYs & MA OUT) are not present

Figure 5. PROVU Electronics Module Layout

USB Connection

Figure 6. USB Connection

• DO NOT disconnect the RJ45 M-LINK connector cable. Otherwise the instrument will not function properly.

• When using the USB connection, the totalizer should only be connected to a computer when both devices are in

a non-hazardous area.

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

25

Power Connections

Power connections are made to a two-terminal
connector labeled POWER. The totalizer will operate
regardless of DC polarity connection. The + and ­symbols are only a suggested wiring convention. There
are separate models for low voltage and high voltage
power. See Ordering Information on page 7 for
details.

Figure 7. Power Connections

Signal Connections

Signal connections are made to a nine-terminal
connector labeled SIGNAL. The COM (common)
terminals are the return for the 4-20 mA and the
10 V input signals. The two COM terminals connect
to the same common return, and are not isolated.

There are no switches or jumpers to set up for current
and voltage inputs. Setup and programming is
performed through the programming buttons or
MeterView Pro software.

Current (mA) Connections

The following figures show examples of current
connections.

INPUT SIGNALS

Figure 8. 2-Wire Transmitters

Powered by Internal Supply

INPUT SIGNALS

Figure 9. 3-Wire Transmitters

Powered by Internal Supply

INPUT SIGNALS

Figure 10. Transmitter Powered by

External Supply

INPUT SIGNALS

Figure 11. Self-Powered Transmitters

The current input is protected against current
overload by a resettable fuse. The display may or
may not show a fault condition depending on the
nature of the overload.

The fuse limits the current to a safe level when it
detects a fault condition, and automatically resets
itself when the fault condition is removed.

Voltage Connections

The following figures show examples of voltage
connections.

INPUT SIGNALS

Figure 12. 2-Wire Voltage Input Connection

INPUT SIGNALS

Figure 13. 3-Wire Voltage Input Connection

The meter is capable of accepting any voltage
from -10 VDC to +10 VDC.

AC or DC

POWER

Required External Fuse:

5 A max, 250 V Slow Blow

POWER

+

-

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

26

RS-485 Connections

The RS-485 connections are made to a five terminal
connector used for Modbus® RTU serial
communications. The RS-485 terminals include
Transmit Data (DO) and (/DO), Receive Data (DI) and
(/DI), and Signal Ground. See Modbus RTU Serial
Communications (serial) on page 54 for more
information.

There are three diagnostic LEDs: Transmit Data (TX),
Receive Data (RX) and METER LINK to show when
the totalizer is transmitting and receiving data from
other devices.

Figure 14. RS-485 Diagnostic LEDs

RS-485 Multi-Drop Connection

When using more than one totalizer in a multi-drop
mode, each totalizer must be provided with its own
unique address. The meter address (Slave ID) can be
programmed between 1 and 247. The transmit delay
can be set between 0 and 199 ms. The parity can be
set to even, odd, or none with 1 or 2 stop bits.

To change the meter address:

1. Press and hold the Menu button for three
seconds to access Advanced Features menu of
the totalizer.

2. Press Up arrow until Serial (SEriaL) menu is
displayed and press Enter, Addres is displayed.

3. Press Enter to change meter address using Right
and Up arrow buttons. Press Enter to accept.

4. Press Menu button to exit and return to Run
Mode.

Three-Wire Connection

In order to wire the five pins for use as a three-wire
half-duplex RS-485 connection, it is necessary to
create a jumper connection between DI to DO and /DI
to /DO- as shown below.

Figure 15. Three-Wire RS-485 Connection

__ __

DI DI DO DO

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

27

Digital I/O Connections

Digital inputs and outputs are provided in order to
expand the functionality of the totalizer. Digital input
connections are made via a push button or switch to
the appropriate digital input terminal and the +5 VDC
terminal. Digital output connections are made by
wiring from the appropriate digital output terminal to
the ground terminal.

Figure 16. Digital Input and Output Connections

The onboard digital inputs (1-4) are configured at the
factory to function identically to the front panel
pushbuttons (Menu, F1, F2, & F3) in order to work
with the SafeTouch buttons. Changing the
programming of the digital inputs will affect the
function of the SafeTouch buttons.
If you wish to change the behavior of the digital
inputs, re-assign F1-F3 to the desired function, then
change the corresponding digital input to match.

• DO NOT disconnect the RJ45 M-LINK connector
cable. Otherwise the instrument will not function
properly.

F4 Digital Input Connections

A digital input, F4, is standard on the totalizer. This
digital input connected with a normally open closure
across F4 and COM, or with an active low signal
applied to F4. It can be used for remote operation of
front-panel buttons, to acknowledge/reset relays,
reset totals, or to reset max/min values. See Function
Keys & Digital I/O Available Settings on page 60 for a
complete list of capabilities.

Figure 17. F4 Digital Input Connections

Remote Programming

The totalizer can be operated via the programming
buttons or a remote control station with required
approvals to be located in a hazardous area using the
digital inputs and outputs.

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 may be powered internally or
from an external power supply.

Figure 18. 4-20 mA Output Connections

Analog Output Transmitter Power Supply

The internal 24 VDC power supply powering the
analog output may be used to power other devices,
if the analog output is not used. The I+ terminal is the
+24 V and the R terminal is the return.

Figure 19. Analog Output Supply

Powering Other Devices

4-20 mA Input

Remote Display, PLC,

Chart Recorder, Etc.

-

+

RI- I+

132

RELAY1

mA OUT

24 V

12-35 VDC

Power

Supply

+

4-20 mA

Input Meter

-+

RI- I+

132

RELAY1

321

-

24 V

mA OUT

Internal Power Supply

and Analog Output

321

Active Output Loop Passive Output Loop

RI- I+

132

24 VDC

Powered

Device

24 V

+-

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

28

Relay Connections

Relay connections are made to two six-terminal
connectors labeled RELAY1 – RELAY4. Each relay’s
C terminal is common only to the normally open (NO)
and normally closed (NC) contacts of the

corresponding relay. The relays’ C terminals should

not be confused with the COM (common) terminal of
the INPUT SIGNAL connector.

Figure 20. Relay Connections

Interlock Relay Feature

As the name implies, the interlock relay feature
reassigns one, or more, alarm/control relays for use
as interlock relay(s). Interlock contact(s) are wired to
digital input(s) and activate the interlock relay. This
feature is enabled by configuring the relay, and the
corresponding digital input(s), see Setting Up the
Interlock Relay (Force On) Feature on page 49.

In the example below, an Interlock Contact switch is
connected to a digital input, which will be used to
force on (energize) the Interlock Relay. The Interlock
Relay and the Control Relay are connected in series
with the load.

• When the Interlock Contact is closed (safe), the
Interlock Relay energizes, allowing power to flow
to the Control Relay; the corresponding front
panel LED is on.

• When the Interlock Contact is open, the
corresponding front panel LED flashes (locked
out), the Interlock Relay is de-energized,
preventing power from flowing to the Control
Relay and the load.

Figure 21. Interlock Connections

Switching Inductive Loads

The use of suppressors (snubbers) is strongly
recommended when switching inductive loads to

prevent disrupting the microprocessor’s operation.

The suppressors also prolong the life of the relay
contacts. Suppression can be obtained with resistor­capacitor (RC) networks assembled by the user or
purchased as complete assemblies. Refer to the
following circuits for RC network assembly and
installation:

Figure 22. AC and DC Loads Protection

Choose R and C as follows:
R: 0.5 to 1 Ω for each volt across the contacts
C: 0.5 to 1 µF for each amp through closed contacts

Notes:

1. Use capacitors rated for 250 VAC.

2. RC networks may affect load release time of solenoid
loads. Check to confirm proper operation.

3. Install the RC network at the totalizer's relay screw
terminals. An RC network may also be installed across
the load. Experiment for best results.

Use a diode with a reverse breakdown voltage two to three
times the circuit voltage and forward current at least as large
as the load current.

Figure 23. Low Voltage DC Loads Protection

RC Networks Available from Precision Digital

RC networks are available from Precision Digital and
should be applied to each relay contact switching an
inductive load. Part number: PDX6901.

Note: Relays are de-rated to 1/14th HP (50 watts) with an
inductive load.

C NONO NC NC C

RELAY4 RELAY3

4 36 5 2 1

C NONO NC NC C

RELAY2 RELAY1

4 36 5 2 1

C
R

C
R

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

29

Setup and Programming

There is no need to recalibrate the totalizer when first received from the factory.
The totalizer is factory calibrated prior to shipment for milliamps and volts with

calibration equipment that is certified to NIST standards.

Overview

There are no jumpers to set for the totalizer input selection.
Setup and programming is done using MeterView Pro or through the programming buttons.
After power and input signal connections have been completed and verified, apply power to the totalizer.

LED Status Indicators

LED

State

Indication

1-4

Steady

Alarm condition based on set and reset points, independent of relay
status in certain configurations. (Available on all totalizer
configurations, including those without relays installed)

1-4

Flashing

Relay interlock switch open

1-4 & M

Flashing

Relay in manual control mode

R

Steady

Rate

T

Steady

Total

T

Flashing

Totalizer in Tare mode

G & T

Steady

Grand Total

▲

Steady

Total overflow. (“oF” is displayed to the left of total overflow and ▲
LED is illuminated)

M

Flashing

Analog output in manual control mode

A

Steady

Channel A displayed

B

Steady

Channel B displayed

C

Steady

Channel C displayed

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

30

Programming Buttons

Button Symbol

Description

Press to enter or exit Programming Mode, view settings, or
exit max/min readings

Press to reset max/min readings or other parameter/function
assigned through the User menu

Press to display max/min readings or other
parameter/function assigned through the User menu

Press to acknowledge relays or other parameters/function
assigned through the User menu

• Press the Menu button to enter or exit the Programming Mode at any time.

• Press the Right arrow button to move to the next digit during digit or decimal point programming.

• Press or hold the Up arrow button to scroll through the menus, decimal point, or to increment the value of a digit.

• Press the Enter button to access a menu or to accept a setting.

• Press and hold the Menu button for three seconds to access the advanced features of the totalizer.

SafeTouch Buttons

The ProtEX-MAX is equipped with four sensors that
operate as through-glass buttons so that it can be
programmed and operated without removing the cover
(and exposing the electronics) in a hazardous area.

These buttons can be disabled for security by
selecting DISABLE on the switch labeled
NO-CONTACT BUTTONS located on the connector
board.

To actuate a button, press one finger to the glass
directly over the marked button area. Then retract
finger more than three inches from the glass before
pressing the next button. When the cover is removed,
the four mechanical buttons located next to the
sensors are used. The sensors are disabled when a
mechanical button is pressed and will automatically
be re-enabled after 60 seconds of inactivity.

The SafeTouch Buttons are designed to filter normal
levels of ambient interference and to protect against
false triggering, however, it is recommended that the
SafeTouch Buttons be disabled (slide switch to
DISABLE) if there is an infrared interference source in
line-of-sight to the display.

The SafeTouch Buttons are configured by default to
duplicate the function of the front panel mechanical
pushbuttons associated with the integrated controller.
The symbols by each SafeTouch button correspond
to a mechanical button as shown in the above table.

SafeTouch Button Tips:

• To the extent possible, install the display facing
away from sunlight, windows, reflective objects
and any sources of infrared interference.

• Keep the glass window clean.

• Tighten the cover securely.

• Use a password to prevent tampering.

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

31

Display Functions & Messages

The following table shows the main menu functions
and messages in the order they appear in the menu.

Display

Parameter

Action/Setting
Description

setup

Setup

Enter Setup menu

Input

Input

Enter Input selection
menu

Ch-A*

Input

Set input type for channel
A (*or B)

nmA

4-20 mA

Set meter for 4-20 mA
input

Volt

0-10 VDC

Set meter for 10 VDC
input

total

Total

Enable/disable totalizer
functions

YES

Yes

Enable totalizer functions

No

No

Disable totalizer functions

units

Unit

Select the display
units/tags

Ch-A*

Rate
unit

Set rate unit or tag for
channel A (*or B)

Ch-C

Math
unit

Set unit or tag for math
channel C

Tot-A*

Total
unit

Set total unit or tag for
channel A (*or B)

Gtot-A*

Grand total
unit

Set grand total unit or tag
for channel A (*or B)

Dec pt

Decimal
point

Set decimal point

Ch-A*

Decimal
point

Set decimal point for
channel A (*or B or C)

Rate*

Rate

Set rate decimal point
(*channel A and B only)

Total*

Total

Set total decimal point
(*channel A and B only)

Gtotal*

Grand total

Set grand total decimal
point (*channel A and B
only)

prog

Program

Enter the Program menu

InCAL

Input
calibration

Enter the Input Calibration
menu

SCAL A

Scale A

Enter the Scale menu for
channel A

SCAl B

Scale B

Enter the Scale menu for
channel B

Cal A

Calibrate A

Enter the Calibration
menu for channel A

Cal B

Calibrate B

Enter the Calibration
menu for channel B

Inp 1

Input 1

Calibrate input 1 signal or
program input 1 value

Dis 1

Display 1

Program display 1 value

Display

Parameter

Action/Setting
Description

Inp 2

Input 2

Calibrate input 2 signal or
program input 2 value
(up to 32 points)

Dis 2

Display 2

Program display 2 value
(up to 32 points)

Error

Error

Error, calibration not
successful, check signal or
programmed value

tsetup

Total setup

Enter the Total Setup
menu

Ch-A*

Channel A

Setup the total for channel
A (*or B)

tbase

Time base

Program total time base

T Cf

Total
conversion
factor

Program total conversion
factor

Gt CF

Grand total
conversion
factor

Program grand total
conversion factor

treset

Total reset

Program total reset mode:
auto or manual

Ch-A*

Channel A

Set total reset modes for
channel A (*or B)

T rst

Total reset

Program total reset mode:
auto or manual

Gt rst

Grand total
reset

Program grand total reset
mode: auto or manual

T dly

Time delay

Program automatic reset
time delay

dsplay

Display

Enter the Display menu

Line 1

Line 1

Assign the main display
parameter

Line 2

Line 2

Assign the second display
parameter

D Ch-A

Display
Ch-A

Assign display to
channel A

D Ch-B

Display
Ch-B

Assign display to
channel B

D Ch-C

Display
Ch-C

Assign display to
channel C (math)

D Ab

Display AB

Alternate display of
channel A & B

D AC

Display AC

Alternate display of
channel A & C

D BC

Display BC

Alternate display of
channel B & C

D AbC

Display
ABC

Alternate display of
channel A, B, & C

D t-a

Display
total A

Assign display to
channel A total

D t-b

Display
total B

Assign display to
channel B total

D gt-a

Display
grand total
A

Assign display to channel
A grand total

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

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32

Display

Parameter

Action/Setting
Description

D gt-b

Display
grand total
B

Assign display to channel
B grand total

D rt-a

Display rate
and total A

Alternate display of
channel A rate and total

D rt-b

Display rate
and total B

Alternate display of
channel B rate and total

Drgt-a

Display rate
and grand
total A

Alternate display of
channel A rate and grand
total

Drgt-b

Display rate
and grand
total B

Alternate display of
channel B rate and grand
total

D set1*

Display
Set 1*

Displays relay 1
(*through 4) set point.

D Hi-A

Display
high A

Display high value of
channel A

D Lo-A

Display
low A

Display low value of
channel A

D HL-A

Display
high/low A

Alternate between
high/low value of
channel A

D Hi-B

Display
high B

Display high value of
channel B

D Lo-B

Display
low B

Display low value of
channel B

D HL-B

Display
High/low B

Alternate between
high/low value of
channel B

D Hi-C

Display
high C

Display high value of
channel C

D Lo-C

Display
low C

Display low value of
channel C

D HL-C

Display
High/low C

Alternate between
high/low value of
channel C

D a-u

Display A
and
units/tags

Alternate display of
channel A and the unit/tag

D B-u

Display B
and
units/tags

Alternate display of
channel B and the unit/tag

D C-u

Display C
and
units/tags

Alternate display of
channel C and the unit/tag

D ta-u

Display total
A and total
units A

Alternate display of
channel A total and total
units

D tb-u

Display total
B and total
units B

Alternate display of
channel B total and total
units

D tab

Display total
A and B

Alternate display of
channel A total and
channel B total

Display

Parameter

Action/Setting
Description

D TAbC

Display total
A, B, and
math
channel C

Alternate display of
channel A total, channel B
total, and math result
channel C

nm bus

Display
Modbus

Display Modbus input
register

D off

Display off

Display blank line 2

D unit

Display unit

Display line 1 channel
units

d-Inty

Display
intensity

Set display intensity level
from 1 to 8

RELaY

Relay

Enter the Relay menu

Assign

Assignment

Assign relays to channels
or Modbus

Asign1*

Assign 1

Relay 1 (*through 4)
assignment

Ch-A*

Channel A*

Assign relay to channel A
(*or B or C)

Rate*

Rate

Assign relay to rate
(*channel A and B only)

Total*

Total

Assign relay to total
(*channel A and B only)

Gtotal*

Grand total

Assign relay to grand total
(*channel A and B only)

nm bus

Modbus

Assign relay to
Modbus register

RLY 1*

Relay 1

Relay 1 (*through 4) setup

Act 1

Action 1

Set relay 1 action

Auto

Automatic

Set relay for automatic
reset

Set 1

Set 1

Enter relay 1 set point

RST 1

Reset 1

Enter relay 1 reset point

A-nman

Auto­manual

Set relay for auto or
manual reset any time

LatCH

Latching

Set relay for latching
operation

Lt-CLr

Latching­cleared

Set relay for latching
operation with manual
reset only after alarm
condition has cleared

Altern

Alternate

Set relay for pump
alternation control

SAnmpl

Sample

Set relay for sample time
trigger control

Off

Off

Turn relay off

FaiLSF

Fail-safe

Enter Fail-safe menu

FLS 1*

Fail-safe 1

Set relay 1 (*through 4)
fail-safe operation

on

On

Enable fail-safe operation

off

Off

Disable fail-safe operation

DeLAY

Delay

Enter relay Time Delay
menu

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

33

Display

Parameter

Action/Setting
Description

DLY 1*

Delay 1

Enter relay 1 (*through 4)
time delay setup

On 1

On 1

Set relay 1 On time delay

OFF 1

Off 1

Set relay 1 Off time delay

break

Loop break

Set relay condition if loop
break detected

Break1*

Break 1

Set relay 1 (*through 4)
break condition

ignore

Ignore

Ignore loop break
condition
(Processed as a low
signal condition)

On

On

Relay goes to alarm
condition when loop break
detected

Off

Off

Relay goes to non-alarm
condition when loop break
detected

Aout

Analog
output

Enter the Analog output
scaling menu

Aout 1

Aout
Channel

Analog Output source
channel

Dis 1

Display 1

Program display 1 value

Out 1

Output 1

Program output 1 value
(e.g. 4.000 mA)

Dis 2

Display 2

Program display 2 value

Out 2

Output 2

Program output 2 value
(e.g. 20.000 mA)

reset

Reset

Press Enter to access the
Reset menu

Rst Hi

Reset high

Press Enter to reset max
display

Rst Lo

Reset low

Press Enter to reset min
display

Rst HL

Reset
high & low

Press Enter to reset max
& min displays

Tot a

Reset
total A

Press Enter to reset
channel A total

Tot b

Reset
total B

Press Enter to reset
channel B total

Gtot a

Reset grand
total A

Press Enter to reset
channel A grand total

Gtot b

Reset grand
total B

Press Enter to reset
channel B grand total

Tot ab

Reset totals
A and B

Press Enter to reset
channels A and B totals

Gt ab

Reset
grand totals
A and B

Press Enter to reset
channels A and B grand
totals

Contrl

Manual
Control

Enter Manual Control
menu

Auto

Automatic

Press Enter to set meter
for automatic operation

Display

Parameter

Action/Setting
Description

nmAn

Manual

Press Enter to manually
control relays or analog
output operation

pass

Password

Enter the Password menu

Pass 1

Password 1

Set or enter Password 1

Unlock

Unlocked

Program password to lock
meter

Locd

Locked

Enter password to unlock
meter

Pass 2

Password 2

Set or enter Password 2

Pass 3

Password 3

Set or enter Password 3

Total

Total reset
password

Set or enter a total reset
password

Gtotal

Grand total
password

Set or enter a grand total
reset password

999999

-99999

Flashing

Over/under range
condition

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

34

Main Menu

The main menu consists of the most commonly used
functions: Reset, Manual Control, Setup, and
Password.

• Press Menu button to enter Programming Mode
then press the Up arrow button to scroll main
menu.

• Press Menu, at any time, to exit and return to
Run Mode. Changes made to settings prior to
pressing Enter are not saved.

• Changes to the settings are saved to memory
only after pressing Enter.

• The display moves to the next menu every time a
setting is accepted by pressing Enter.

Setting Numeric Values

The numeric values are set using the Right and Up
arrow buttons. Press Right arrow to select next digit
and Up arrow to increment digit value. The digit being
changed is displayed brighter than the rest.

Press and hold up arrow to auto-increment the display
value. If negative numbers are allowed, the first digit
position will include a negative symbol (-) after the 9.

Press the Enter button, at any time, to accept a
setting or Menu button to exit without saving changes.

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

35

Setting Up the Totalizer (setup)

The Setup menu is used to select:

1. Input signal the totalizer will accept for channel A and channel B

2. Units for A & B rate, total & grand total, and C

3. Decimal positions for A & B rate, total, and grand total, and C

4. Program the totalizer using the scale, calibrate, & total functions

5. Display parameters and intensity

6. Relay assignments and operation

7. 4-20 mA analog output scaling

Press the Menu button to exit at any time.

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

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Setting the Input Signal (Input)

Enter the Input menu to set up the totalizer to display
current (nmA) or voltage (Volt) inputs for channel A
and channel B.

The current input is capable of accepting any signal
from 0 to 20 mA. Select current input to accept
0-20 mA or 4-20 mA signals.

The voltage input is capable of accepting any signal
from -10 to +10 VDC. Select voltage input to accept
0-5, 1-5, 0-10, or 10 VDC signals.

Channel C is the Math Function calculation, which is
set up in the Advanced Features menu.

Setting the Totalizer Features (total)

To simply not display the total, select alternative
display parameters in the display (dsplay) menu.

Enable or disable the totalizer features by selecting

“Yes” or “no” after the input type has been set up for

each channel. If the totalizer features are disabled, all
the totalizer features and functions are hidden from
the menus. Level and process totalizer features and
functions are added to the menus.

If disabling the total parameter by selecting no,
please refer to the PD8-6060 manual for instructions
on setting up the totalizer parameters.

Notes:

1. The totalizer continues working in the background.

2. When selecting "no" for Total for a channel, the totalizer
now functions as a PD8-6060 Dual-Input Process Meter
for parameters that affect that channel. We strongly
suggest that you download and use the PD8-6060
instruction while in this mode of operation.

Setting the Rate, Total, & Grand Total Units/Tags (units)

Enter the channel A and B rate, total, grand total, and
math channel C units (or custom tags) that will be
displayed if alternating units is selected in the units
menu, or d unit is selected as the second display
parameter.

See the Setting the Display Parameters & Intensity
(dsplay) flow chart on page 40 for details on
accessing the Units menu and parameters. Ch-A and
Ch-B set the rate units, tot-A and tot-B the total
units, and Gtot-A and Gtot-B the grand total units.
Ch-C sets the units for the math channel C.

See the Setting the Display Parameters & Intensity
(dsplay) flow chart on page 40 to access the display
menu to show the unit or tag on the second display.

The engineering units or custom legends can be set
using the following 7-segment character set:

Display

Character

Display

Character

0

0

k K 1

1

l

L

2

2

n m

m

3

3

n n 4

4

O O 5

5

o o 6

6

p P 7

7

q q 8

8

r r 9

9

s S A

A

t t b

b

u u C

C

v V c

c

uw w d

d

x X e

E

y Y f

F

z Z g

G

- - 9

g

/

/

H

H

[

]

h

h

] [ I

I

= = I

i

!

Degree(<)

j

J

Space

Notes:

1. Degree symbol represented by (<) if programming with
MeterView Pro.

2. The letters “m” and “w” use two 7-segment LEDs each;
when selected the characters to the right are shifted
one position.

3. Press and hold up arrow to auto-scroll the characters in
the display.

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

37

Setting the Decimal Point (dEc pt)

The decimal point for any channel, rate, total, or
grand total, may be set with up to five decimal places
or with no decimal point at all.

Pressing the Right arrow moves the decimal point one
place to the right until no decimal point is displayed,
and then it moves to the leftmost position. Pressing
the Up arrow moves the decimal point one place to
the left.

There are seven decimal points to set up for three
channels: Ch-A rate, total, and grand total; Ch-B rate,
total, and grand total; and Ch-C.

After the decimal points are set up, the totalizer
moves to the Program menu.

Programming the Rate/Totalizer (prog)

The totalizer may either be scaled (SCALE) without
applying an input or calibrated (Cal) by applying an
input. The totalizer comes factory calibrated to NIST
standards, so for initial setup, it is recommended to
use the (SCALE) function.

The Program menu contains the following menus:

1. Scale channel A and B without a signal

source

2. Calibrate channel A and B with a calibrated

signal source

3. Channel A and B total time base &

conversion factors

4. Channel A and B grand total time base &

conversion factors

5. Channel A and B reset modes for total &

grand total

The process inputs may be calibrated or scaled to any
display value within the range of the totalizer.

Note: The Scale and Calibrate functions are exclusive of
each other. The totalizer uses the last function
programmed. Only one of these methods can be employed
at a time. The Scale and Calibrate functions can use up to
32 points (default is 2). The number of points should be set
in the Advanced menu prior to scaling and calibration of the
totalizer. See Multi-Point Linearization (

Linear

) menu on

page 56 for details.

Additional parameters, not needed for most
applications, are found in the Advanced Features
menu; see Advanced Features Menu on page 52.

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Input Calibration Method (InCAL)

There are two methods of calibrating (or scaling) the
display for each input channel to show the correct
engineering units.

• Use the Scale menu to enter the scaling without a
signal source.

• Use the Calibrate menu to apply a signal from a
signal source.

Note: The Scale and Calibrate functions are exclusive of
each other. The totalizer uses the last function programmed.
Only one of these methods can be employed at a time. The
Scale and Calibrate functions can use up to 32 points
(default is 2). The number of points should be set in the
Advanced menu prior to scaling and calibration of the
totalizer. See Multi-Point Linearization (Linear) menu on
page 56 for details.

Scaling the Totalizer without a Signal Source (SCAL-A, SCAL-B)

The process inputs (4-20 mA, 10 VDC) can be
scaled to display the process variables in engineering
units. A signal source is not needed to scale the
totalizer; simply program the inputs and
corresponding display values.

From the INCAL menu, select channel A or B,
followed by SCal-A or SCal-B, and then set the input
signal value and display value for each of the scaling
points (default is two).

Scaling the Totalizer for Channel A (SCal-A)

Scaling the Totalizer for Channel B (SCal-B)

For instructions on how to program numeric

values see Setting Numeric Values, page 34.

Error Message (Error)

An error message indicates that the calibration or
scaling process was not successful.

After the error message is displayed, the totalizer
reverts to input 2 during calibration or scaling and to
input 1 during internal calibration, allowing the
appropriate input signal to be applied or programmed.

The error message might be caused by any of the
following conditions:

1. Input signal is not connected to the proper
terminals or it is connected backwards.

2. Wrong signal selection in Setup menu.

3. Minimum input span requirements not
maintained.

4. Input 1 signal inadvertently applied to calibrate
input 2.

Minimum Input Span

The minimum input span is the minimum difference
between input 1 and input 2 signals required to complete
the calibration or scaling of the totalizer.

Input Range

Input 1 & Input 2 Span

4-20 mA

0.15 mA

10 VDC

0.10 VDC

• Reverse Scaling
The controller can be scaled so that 4 mA
represents the high end of the process value
range being measured by the transmitter and
20 mA represents the low end of the process
value range.

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Calibrating the Totalizer with External Source

To scale the totalizer without a signal source, refer

to Scaling the Totalizer without a Signal Source

(SCAL-A, SCAL-B) on page 38.

The totalizer can be calibrated to display the process
variables in engineering units by applying the
appropriate input signal and following the calibration
procedure.

The use of a calibrated signal source is strongly
recommended to calibrate the totalizer.

Warm up the totalizer for at least 15 minutes before

performing calibration to ensure specified

accuracy.

Calibrating the Totalizer for

Channel A (CAL-A)

Note: Inputs for the above example are:

Input 1: 4.00 mA; Display 1: 0.0 Gallons
Input 2: 20.00 mA; Display 2: 5000.0 Gallons

Calibrating the Totalizer for

Channel B (CAL-B)

Note: Inputs for the above example are:

Input 1: 4.00 mA; Display 1: 0.0 Gallons
Input 2: 20.00 mA; Display 2: 18000.0 Gallons

Total & Grand Total Setup (tsetup)

The time base and total conversion factor, and grand
total conversion factor for input channels A and B are
located in the Totalizer Setup menu.

The time base is based on the rate of flow. Total &
grand total conversion factors for channel A and B are
programmed independently. The total and grand total
have their own independent settings. This means that
one can be displaying the value in gallons while the
other displays in million gallons, liters, m3, etc.

Total & Grand Total Reset

Total reset menus are located in the Program menu.
The totals can be programmed for manual or
automatic reset. In the automatic reset mode, a
programmable time delay is available to reset the total
or grand total after the assigned preset is reached.
The totals can also be reset via the front panel button,
via a switch across the F4 terminal, digital inputs, or
via a Modbus command.

Password Protected and Non-Resettable Total

The total and grand total can be password-protected
to prevent unauthorized resets. The grand total can
be programmed as a non-resettable total, see Total

Reset Password &
Non-Resettable Total on page 51 for details.

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Setting the Display Parameters & Intensity (dsplay)

Display line 1 (line 1) can be programmed to
display:

1. Ch-A rate (D Ch-A)

2. Ch-B rate (D Ch-B)

3. Ch-C math channel (D Ch-C)

4. Toggle Ch-A & Ch-B rate (D AB)

5. Toggle Ch-A rate and Ch-C (D AC)

6. Toggle Ch-B rate and Ch-C (D BC)

7. Toggle Ch-A & Ch-B rate, and Ch-C (D ABC)

8. Ch-A total (D T-A)

9. Ch-B total (D T-B)

10. Ch-A grand total (D GT-A)

11. Ch-B grand total (D GT-B)

12. Toggle Ch-A rate and total (D RT-A)

13. Toggle Ch-B rate and total (D RT-B)

14. Toggle Ch-A rate and grand total (DRGT-A)

15. Toggle Ch-B rate and grand total (DRGT-B)s

16. Relay set points (1-4) (DSET 1 to DSET 4)

17. Max, min, and max & min values for
Ch-A, Ch-B, or Ch-C (D Hi-A to d HL-C)

18. Toggle Ch-A rate & units (d A-u)

19. Toggle Ch-B rate & units (d B-u)

20. Toggle Ch-C & units (d C-u)

21. Toggle Ch-A total & units (d TA-u)

22. Toggle Ch-B total & units (d TB-u)

23. Toggle Ch-A total and Ch-B total (d tAb)

24. Toggle Ch-A total, Ch-B total, and the sum of
total A + total B (d tABC)*

25. Modbus input (nm bus)

*Note: The (C = sum of total A + total B) displayed with
the selection (d tABC) is different than the math
channel C calculated under the Math menu functions.
Example: (C = Rate Ch-A + Rate Ch-B).

Display line 2 (Line 2) can be programmed to
display:

1. All options for display line 1

2. Off, with no display (d ofF)

3. Engineering units for any single channel,
total, or grand total

Display Parameter Menu

After setting up the input and display, press the Menu
button to exit programming and skip the rest of the
setup menu.

Customizable Displays

The displays can be set up to read input channels
(A or B), rate, total, or grand total, math function
channel C, toggle between A & B, B & C, A & C, A &
B & C, toggle between channels A, B, or C & units,
the max/min of any of the channels, including the
math channel (C), set points, or the Modbus input.
This allows the display to be setup to display
whatever variables are most valuable to the
application. Here are just a few examples.

Line 1 displays Math Function (C)

Line 2 toggles between Totals A & B

Math Function & Tag Input Channels
A & B Total

Display Intensity (d-Inty)

The totalizer has eight display intensity levels to give
the best performance under various lighting
conditions. Select intensity 8 for outdoor applications.
The default intensity is 6.

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Setting the Relay Operation (relay)

This menu is used to set up the assignment and
operation of the relays.

• During setup, the relays do not follow the input
and they will remain in the state found prior to
entering the Relay menu.

1. Relay assignment

a. Channel A rate, total, or grand total
b. Channel B rate, total, or grand total
c. Channel C (Math channel)
d. Modbus

2. Relay action

a. Automatic reset only (non-latching)
b. Automatic + manual reset at any time

(non-latching)
c. Latching (manual reset only)
d. Latching with Clear (manual reset only

after alarm condition has cleared)
e. Pump alternation control (automatic

reset only)
f. Sampling (the relay is activated for a

user-specified time)
g. Off (relay state controlled by Interlock

feature)

3. Set point

4. Reset point

5. Fail-safe operation
a. On (enabled)
b. Off (disabled)

6. Time delay
a. On delay (0-999.9 seconds)
b. Off delay (0-999.9 seconds)

7. Relay action for loss (break) of 4-20 mA
input (ignore, on, off)

Setting the Relay Assignment (asSign)

Relays may be assigned to Channel A (rate, total, or
grand total), Channel B (rate, total, or grand total),
Channel C (Math channel), or Modbus input.

Setting the Relay Action (Act)

Operation of the relays is programmed in the Action
menu. The relays may be set up for any of the
following modes of operation:

1. Automatic reset (non-latching)

2. Automatic + manual reset at any time (non­latching)

3. Latching (manual reset only, at any time)

4. Latching with Clear (manual reset only after
alarm condition has cleared)

5. Pump alternation control (automatic reset
only)

6. Sampling (the relay is activated for a user­specified time)

7. Off (relay state controlled by Interlock
feature)

The following graphic shows relay 1 action setup;
relay 2-4 are set up in a similar fashion.

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Programming Set and Reset Points

High alarm indication: program set point above reset
point.
Low alarm indication: program set point below reset
point.
The deadband is determined by the difference
between set and reset points. Minimum deadband is
one display count. If the set and reset points are
programmed with the same value, the relay will reset
one count below the set point.

Note: Changes are not saved until the reset point has been
accepted.

Setting Fail-Safe Operation

In fail-safe mode of operation, the relay coil is
energized when the process variable is within safe
limits and the relay coil is de-energized when the
alarm condition exists. The fail-safe operation is set
independently for each relay. Select on to enable or
select off to disable fail-safe operation.

Programming Time Delay

The On and Off time delays may be programmed for
each relay between 0 and 999.9 seconds. The relays
will transfer only after the condition has been
maintained for the corresponding time delay.

The On time delay is associated with the set point.
The Off time delay is associated with the reset point.

Relay Action for Loss of 4-20 mA Input (Loop Break)

The loop break feature is associated with the 4-20 mA
input. Each relay may be programmed to go to one of
the following conditions when the totalizer detects the
loss of the input signal (i.e. < 0.005 mA):

1. Turn On (Go to alarm condition)

2. Turn Off (Go to non-alarm condition)

3. Ignore (Processed as a low signal condition)

Note: This is not a true loop break condition; if the signal

drops below 0.005 mA, it is interpreted as a
“loop break” condition.

The following graph shows the loop break relay
operation for a high alarm relay.

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Relay and Alarm Operation Diagrams

The following graphs illustrate the operation of the
relays, status LEDs, and ACK button.

High Alarm Operation (Set > Reset)

For Manual reset mode, ACK can be pressed anytime
to turn "off" relay. To detect a new alarm condition,
the signal must go below the set point, and then go
above it.

Low Alarm Operation (Set < Reset)

For Manual reset mode, ACK can be pressed anytime to turn
"off" relay. To detect a new alarm condition, the signal must
go below the set point, and then go above it.

High Alarm with Fail-Safe Operation (Set > Reset)

Note: Relay coil is energized in non-alarm condition. In case

of power failure, relay will go to alarm state.

Low Alarm with Fail-Safe Operation (Set < Reset)

Note: Relay coil is energized in non-alarm condition. In case

of power failure, relay will go to alarm state.

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Time Delay Operation

The following graphs show the operation of the time
delay function.

When the signal crosses the set point, the On time
delay timer starts and the relay trips when the time
delay has elapsed. If the signal drops below the set
point (high alarm) before the time delay has elapsed,
the On time delay timer resets and the relay does not
change state. The same principle applies to the Off
time delay.

Note: If “Automatic or Manual (A-nmAn)” reset mode is
selected, the LED follows the reset point and not the relay
state when the relay is acknowledged.

Total Relay Sampling Operation

When the total reaches the preset, the relay trips and
the sample time starts. After the sample time has
elapsed, the relay resets. The cycle repeats every
time the preset value is added to the total.

Preset = 100

100

Relay

LED

Total

200

300

Sample

Time

Sample

Time

Sample

Time

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Pump Alternation Control Operation

Relay Sampling Operation

When the signal crosses the set point, the relay trips and the sample time starts. After the sample time has elapsed,
the relay resets. The cycle repeats every time the set point is crossed, going up for high alarms and going down for
low alarms.

The sample time can be programmed between 0.1 and 5999.9 seconds.

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Relay Operation Details

Overview

The four-relays option for the totalizers expands its
usefulness beyond simple indication to provide users
with alarm and control functions. Typical applications
include high and low temperature, level, pressure or
flow alarms, control applications such as simple on/off
pump control, and pump alternation control for up to 4
pumps. There are four basic ways the relays can be
used:

1. High and Low Alarms with Latching or
Non-Latching Relays

2. Simple On/Off Control with 100% Adjustable
Deadband

3. Sampling (Based on Time)

4. Pump Alternation Control for up to 4 Pumps

Relays Auto Initialization

When power is applied to the totalizer, the front panel
LEDs and alarm relays will reflect the state of the
input to the totalizer. The following table indicates how
the alarm LEDs and relays will react on power-up
based on the set and reset points:

Fail-Safe Operation

The following table indicates how the relays behave
based on the fail-safe selection for each relay:

Fail-Safe
Selection

Non-Alarm State

Alarm State

Power
Failure

NO

NC

NO

NC

Off

Open

Closed

Closed

Open

Relays
go to
non­alarm
state

On

Closed

Open

Open

Closed

Relays
go to
alarm
state

Note: NO = Normally Open, NC = Normally Closed. This
refers to the condition of the relay contacts when the power
to the totalizer is off.

Front Panel LEDs

The alarm status LEDs on the front panel are
available on all totalizers, even those without relays
installed, and provide status indication for the
following:

LED

Status

1

Alarm 1

2

Alarm 2

3

Alarm 3

4

Alarm 4

The totalizer is supplied with four alarm points that
include front panel LEDs to indicate alarm conditions.
This standard feature is particularly useful for alarm
applications that require visual-only indication. The
LEDs are controlled by the set and reset points
programmed by the user. When the display reaches a
set point for a high or low alarm, the corresponding
alarm LED will turn on. When the display returns to
the reset point the LED will go off. The front panel
LEDs responds differently for latching and
non-latching relays.

For non-latching relays, the LED is always off during
normal condition and always on during alarm
condition, regardless of the state of the relay
(e.g. Relay acknowledged after alarm condition).

For latching relays, the alarm LEDs reflects the status
of the relays, regardless of the alarm condition. The
following tables illustrate how the alarm LEDs function
in relation to the relays and the acknowledge button
(Default: F3 key assigned to ACK).

Latching and Non-Latching Relay Operation

The relays can be set up for latching (manual reset)
or non-latching (automatic reset) operation.

Relay terminology for following tables

Terminology

Relay Condition

On

Alarm (Tripped)

Off

Normal (Reset)

Ack

Acknowledged

The On and Off terminology does not refer to the
status of the relay’s coil, which depends on the fail­safe mode selected.

• In latching relay mode, if Fail-Safe is off, latched
relays will reset (unlatch) when power is cycled.

Alarm #

HI or LO

Alarm

Set

Point

Reset

Point

Power-

Up

Reading

Relay &

LED

1

HI

1000

500

499

Off

2

LO

700

900

499

On 3 LO

250

400

499

Off

4

HI

450

200

499

On

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Non-Latching Relay (Auto)

In this application, the totalizer is set up for automatic
reset (non-latching relay). Acknowledging the alarm
while it is still present has no effect on either the LED
or the relay. When the alarm finally goes away, the
relay automatically resets and the LED also goes off.

Non-Latching Relay with Manual Reset (A-nman)

In this application, the totalizer is set up for automatic
and manual reset at any time (non-latching relay).
The LED and the relay automatically reset when the
totalizer returns to the normal condition.

In addition, the relay can be manually reset while the
alarm condition still exists, but the LED will stay on
until the totalizer returns to the normal condition.

Automatic + manual reset at any time

Condition

LED

Relay

Normal

Off

Off

Alarm

On

On

Normal

Off

Off

Next Alarm

On

On

Ack

On

Off

Normal

Off

Off

Latching Relay (LatcH)

In this application, the totalizer is set up for
manual reset at any time. Acknowledging the
alarm even if the alarm condition is still present
resets the relay and turns off the LED.

Manual reset any time

Condition

LED

Relay

Normal

Off

Off

Alarm

On

On

Ack

Off

Off

Latching Relay with Clear (Lt-Clr)

In this application, the totalizer is set up for manual
reset only after the signal passes the reset point
(alarm condition has cleared). Acknowledging the
alarm while it is still present has no effect on either
the LED or the relay. When the alarm is
acknowledged after it returns to the normal state, the
LED and the relay go off. Notice that the LED remains
on, even after the totalizer returns to the normal
condition. This is because, for latching relays, the
alarm LED reflects the status of the relay, regardless
of the alarm condition.

Manual reset only after

alarm condition has cleared

Condition

LED

Relay

Normal

Off

Off

Alarm

On

On

Ack (No effect)

On

On

Normal

On

On

Ack

Off

Off

Automatic reset only

Condition

LED

Relay

Normal

Off

Off

Alarm

On

On

Ack (No effect)

On

On

Normal

Off

Off

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Acknowledging Relays

There are three ways to acknowledge relays
programmed for manual reset:

1. Via the programmable front panel function keys
F1-F3 (Example: F3 assigned to ACK).

2. Remotely via a normally open push button wired
to the F4 terminal.

3. Remotely via a normally open push button wired
to one of the digital inputs and the +5 V terminal
on the digital I/O connections.

When the ACK button or the assigned digital input is
closed, all relays programmed for manual reset are
acknowledged.

Pump Alternation Control Applications (Altern)

For pump control applications where two or more
similar pumps are used to control the level of a tank
or a well, it is desirable to have all the pumps operate
alternately. This prevents excessive wear and
overheating of one pump over the lack of use of the
other pumps.

Up to 8 relays can be set up to alternate every time
an on/off pump cycle is completed. The set points and
reset points can be programmed, so that the first
pump on is the first pump off.

Application #1: Pump Alternation Using Relays 1 & 2

1. Relays 1 and 2 are set up for pump alternation.

2. Relays 3 and 4 are set up for low and high alarm
indication.

Set and Reset Point Programming

Relay

Set Point

Reset Point

Function

1

30.000

10.000

Controls
pump #1

2

35.000

5.000

Controls
pump #2

3

4.000

9.000

Controls
low alarm

4

40.000

29.000

Controls
high alarm

Pump Alternation Operation

1. Pump #1 turns on when level reaches 30.000,
when level drops below 10.000 pump #1 turns
off.

2. The next time level reaches 30.000, pump #2
turns on, when level drops below 10.000, pump
#2 turns off.

3. If the level doesn’t reach 35.000 pump #1 and
pump #2 will be operating alternately.

4. If pump #1 cannot keep the level below 35.000
pump #2 will turn on at 35.000, then as the level
drops to 10.000 pump #1 turns off, pump #2 is
still running and shuts off below 5.000.

5. Notice that with the set and reset points of pump
#2 outside the range of pump #1, the first pump
on is the first pump to go off. This is true for up to
8 alternating pumps, if setup accordingly.

6. Relay #3 will go into alarm if the level drops
below 4.000 and relay #4 will go into alarm if the
level exceeds 40.000.

7. Adding the 4 external relays expansion module
allows using the 4 SPDT internal relays for pump
alternation and the 4 SPST external relays for
high, high-high, low, and low-low alarm
indication.

P- F4P+ COM V+

3412 5

mA+ COM V+ mA+

7869

+5 I1 I2 I3 I4 O1 O2 O3 O4 G

DO 1-4

GND

ACK

PDA1044 Digital I/O Module

1 2 3 4 5 6 7 8 9 10

DI 1-4

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Setting Up the Interlock Relay (Force On) Feature

Relays 1-4 can be set up as interlock relays. To set
up the relays for the interlock feature:

1. Access the Setup – Relay – Action menu and set
the action to off.

2. In the Advanced features – User menu program

any of the digital inputs to Force On any of the
internal relays (1-4).

3. Connect a switch or dry contact between the +5V

terminal and the corresponding digital input
(dI-1 to dI-4) terminal.

Interlock Relay Operation Example

Relays 1 & 2 are configured to energize (their front
panel LEDs are steady on) when SW1 & SW2
switches (above) are closed. If the contacts to these
digital inputs are opened, the corresponding front
panel LEDs flash, indicating this condition. The
processes being controlled by the interlock relay will
stop, and will re-start only after the interlock relay is
re-activated by the digital inputs (switches).

Note: If multiple digital inputs are assigned to the same
relay, then the corresponding logic is (AND) – i.e. both
switches must be closed to trip the relay.

• If the digital inputs are assigned to the Interlock
Function, then they cannot be used to program

the totalizer remotely.

1 2 3 4 5

6

+5

I1

I2

I3

I4

O1

7

8

O2

O3

9

10

O4

G

DI 1-4

DO 1-4

5 VDC

GND

SW2

SW1

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Scaling the 4-20 mA Analog Output (Aout)

The 4-20 mA analog output can be scaled to provide
a 4-20 mA signal for any display range selected. To
select the channel and source assignments the
analog output is assigned to, see Analog Output
Source on page 58.

No equipment is needed to scale the analog output;
simply program the display values to the
corresponding mA output signal.

The Analog Output menu is used to program the
4-20 mA outputs based on display values.

For further details, see Setting Numeric Values

on page 34, Analog Output Value for Loss of

4-20 mA Input (Loop Break) on page 58.

Reset Menu (reset)

The Reset menu is used to reset the maximum (peak)
value of Ch-A and Ch-B rate (rst Hi), minimum
(valley) reading of Ch-A and Ch-B rate (rst Lo), both
high and low value of Ch-A and Ch-B rate (rst HL),
Ch-A total (tot A) or Ch-B total (tot B), Ch-A grand
total (Gtot A) or Ch-B grand total (Gtot B), both
Ch-A and Ch-B totals (tot AB), or both Ch-A and
Ch-B grand totals (Gt AB).

Manual Control Menu (Contrl)

The Manual Control menu is used to control the
4-20 mA analog output (Aout 1 only) and the relays
manually, ignoring the input. Each relay and analog
output can be programmed independently for manual
control. Selecting automatic control sets all relays and
analog output for automatic operation.

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Setting Up the Password (pass)

The Password menu is used for programming three
levels of security to prevent unauthorized changes to
the programmed parameter settings, to restrict the
ability to reset the totals and grand totals, and to
program the non-resettable totalizer.

Pass 1: Allows use of function keys and digital
inputs

Pass 2: Allows use of function keys, digital inputs
and editing set/reset points
Pass 3: Restricts all programming, function keys,
and digital inputs.

Total: Prevents resetting the total manually
Gtotal: Prevents resetting the grand total manually

Protecting or Locking the Totalizer Functions

Enter the Password menu and program a six-digit
password.

For instructions on how to program numeric values
see Setting Numeric Values on page 34.

Total Reset Password & Non-Resettable Total

The total and the grand total can be password-protected
to prevent unauthorized total resets.

The grand total can be programmed as a
non-resettable total by entering the password

“050873”.

• Once the Grand Total has been programmed as

“non-resettable” the feature CANNOT be
disabled.

Making Changes to a Password Protected Totalizer

If the totalizer is password protected, the totalizer will
display the message Locd (Locked) when the Menu
button is pressed. Press the Enter button while the
message is being displayed and enter the correct
password to gain access the menu. After exiting the
programming mode, the totalizer returns to its
password protected condition.

Disabling Password Protection

To disable the password protection, access the
Password menu and enter the correct password
twice, as shown below. The totalizer is now
unprotected until a new password is entered.

If the correct six-digit password is entered, the
totalizer displays the message unLoc (unlocked) and
the protection is disabled until a new password is
programmed.

If the password entered is incorrect, the totalizer
displays the message Locd (Locked) for about two
seconds, and then it returns to Run Mode. To try
again, press Enter while the Locked message is
displayed.

Did you forget the password?

The password may be disabled by entering a
master password once. If you are authorized to
make changes, enter the master password 508655
to unlock the totalizer.

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

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Advanced Features Menu

To simplify the setup process, functions not needed
for most applications are located in the Advanced
Features menu.

Press and hold the Menu button for three seconds to
access the advanced features of the totalizer.

Advanced Features Menu & Display Messages

The following table shows the functions and
messages of the Advanced Features menu in the
order they appear in the menu.

Advanced Features Menu & Display Messages

Display

Parameter

Action/Setting

filtEr

Filter

Set noise filter value

Ch-A

Channel A

Set filter value for channel
A

Ch-b

Channel B

Set filter value for channel
B

bypASs

Bypass

Set filter bypass value

Ch-A

Channel A

Set filter bypass value for
channel A

Ch-b

Channel B

Set filter bypass value for
channel B

Round

Round

Set the rounding value for
display variables

seriAl

Serial

Set serial communication
parameters

SlaVId

Slave ID

Set slave ID or meter
address

Baud

Baud rate

Select baud rate

Tr dLY

Transmit delay

Set transmit delay for serial
communication

Parity

Parity

Select parity
Even, Odd, or None with 1
or 2 stop bits

t-byt

Time byte

Set byte-to-byte timeout

SelEct

Select

Enter the Select menu
(function, cutoff, out)

Functn

Input signal
conditioning

Select linear, square root,
programmable exponent, or
round horizontal tank
function

Ch-A

Channel A

Select menu for channel A

Advanced Features Menu & Display Messages

Display

Parameter

Action/Setting

Ch-b

Channel B

Select menu for channel B

Linear

Linear

Set meter for linear function
and select number of
linearization points

No pts

Number of
points

Set the number of
linearization points
(default: 2)

Square

Square root

Set meter for square root
extraction

Prog E

Programmable
exponent

Set meter for
programmable exponent
and enter exponent value

nmath

Math

Enter the setup menu for
channel C math functions

Sunm

Sum

C = (A+B+P)*F

Dif

Difference

C = (A-B+P)*F

difabs

Absolute
difference

C = ((Absolute value of (A­B))+P)*F

AVg

Average

C = (((A+B)/2)+P)*F

nmulti

Multiplication

C = ((A*B)+P)*F

DiVide

Divide

C = ((A/B)+P)*F

Hi-ab

Max of A or B

C = ((High value of channel
A or B)+P)*F

Lo-ab

Min of A or B

C = ((Low value of channel
A or B)+P)*F

Drauw

Draw

C = ((A/B)-1)*F

uw Avg

Weighted avg.

C = ((B-A)*F)+A

ratio

Ratio

C = (A/B)*F

Ratio2

Ratio 2

C = ((B-A)/A)+P)*F

Concen

Concentration

C = (A/(A+B))*F

Sunm t

Sum total

C = (tA+tB+P)*F

Sunmgt

Sum grand total

C = (GtA+GtB+P)*F

Dif t

Difference of
total

C = (tA-tB+P)*F

Dif gt

Diff. of grand
total

C = (GtA-GtB+P)*F

Tratio

Total ratio

C = (tA/tB)*F

t-rat2

Total ratio 2

C = ((tB-tA)/tA)*F

T pct

Total percent

C = (tA/(tA+tB))*100

Const

Constant

Enter math equation
constants

adder

Adder

Addition constant used in
channel C math
calculations (P)

factor

Factor

Multiplication constant used
in channel C math
calculations (F)

CutofF

Cutoff

Set low-flow cutoff

Ch-A

Channel A

Set low-flow cutoff for
Channel A

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

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Advanced Features Menu & Display Messages

Display

Parameter

Action/Setting

Ch-b

Channel B

Set low-flow cutoff for
Channel B

Count

Count

Set total count direction

Ch-A

Channel A

Set total count direction for
Channel A

Ch-b

Channel B

Set total count direction for
Channel B

Tot C

Total count

Set direction of total count

Gtot C

Grand total
count

Set direction of grand total
count

up

Count up

Count up

Douwn

Count down

Count down

C
strt

Count start

Enter count down start
value

AoutPr

Analog output
programming

Program analog output
parameters

Aout*

Analog output

Program analog output
parameters

Source

Source

Select source for the
4-20 mA output

break

Loop break

Set analog output value if
input loop break is detected

Calib

Calibrate

Calibrate 4-20 mA output
(internal reference source
used for scaling the output)

4 nmA

4 mA output

Enter mA output value read
by milliamp meter with at
least 0.001 mA resolution

20 nmA

20 mA output

Enter mA output value read
by milliamp meter with at
least 0.001 mA resolution

O-rang

Overrange

Program mA output for
display overrange

u-rang

Underrange

Program mA output for
display underrange

nmAx

Maximum

Program maximum mA
output allowed

nmin

Minimum

Program minimum mA
output allowed

User

User I/O

Assign function keys and
digital I/O

F1*

F1* function key

Assign F1 function key
(*F1/F2/F3)

F4

F4 digital input

Assign F4 function (digital
input)

dI I

Digital input 1

Assign digital input 1 – 4

dO 1

Digital output 1

Assign digital output 1 – 4

ICal

Internal
calibration

Enter internal calibration
(used for recalibrating the
meter with a calibrated
signal source)

Ch-A

Channel A

Perform calibration on
channel A

Advanced Features Menu & Display Messages

Display

Parameter

Action/Setting

Ch-b

Channel B

Perform calibration on
channel B

C CAL

Current
calibration

Calibrate 4-20 mA current
input (internal reference
source used for scaling the
input)

C lo

Current low

Calibrate low current input
(e.g. 4 mA)

C Hi

Current high

Calibrate high current input
(e.g. 20 mA)

V CAL

Voltage
calibration

Calibrate voltage input

V Lo

Voltage low

Calibrate low voltage input
(e.g. 0 V)

V Hi

Voltage high

Calibrate high voltage input
(e.g. 10 V)

Diag

Diagnostics

Display parameter settings

LED t

LED test

Test all LEDs

Info

Information

Display software number
and version

erase

Erase

Erase MeterView Pro

software stored in meter’s

memory

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Noise Filter (filter)

The noise filter is available for unusually noisy signals
that cause an unstable process variable display. The
noise filter averages the input signal over a certain
period. The filter level determines the length of time
over which the signal is averaged. The filter level can
be set between 2 and 199. The higher the filter level,
the longer the averaging time and so the longer it
takes the display to settle to its final value. Setting the
filter level to zero disables the filter function.

Noise Filter Bypass (bypass)

The noise filter bypass changes the behavior of the
totalizer so that small variations in the signal are
filtered out but large abrupt changes in the input
signal are displayed immediately. The bypass value
determines the minimum amount of signal change to
be displayed immediately. All signal changes smaller
than the bypass value are filtered or averaged by the
totalizer. The noise filter bypass may be set between

0.1 and 99.9% of full scale.

Rounding Feature (round)

The rounding feature is used to give the user a
steadier display with fluctuating signals. Rounding is
used in addition to the filter function.

Rounding causes the display to round to the nearest
value according to the rounding selected. This setting
affects the last two digits, regardless of decimal point
position. See examples below:

Rounding
Selection

Actual
Value

Display
Value

Actual
Value

Display
Value

1

12.022

12.022

12.023

12.023

5

12.022

12.020

12.023

12.025

10

12.024

12.020

12.025

12.030

Modbus RTU Serial Communications (serial)

The totalizer is equipped with serial communications
capability as a standard feature using Modbus RTU
Serial Communication Protocol.

The totalizer may be connected to a PC for initial
configuration via the onboard USB connection. For
ongoing digital communications with a computer or
other data terminal equipment, use the RS-485
connection with the appropriate serial converter; see
Ordering Information on page 7 for details.

• DO NOT connect any equipment to the RJ45
M-LINK connector. Otherwise damage will occur
to the equipment and the totalizer.

• DO NOT disconnect the RJ45 connector located
to the left of the power terminal block. Doing so
will disable the on-board digital I/O, and the
RS-485 serial communications.

Notes:

1. More detailed instructions are provided with each
optional serial communications adapter.

2. Refer to the ProtEX-MAX Modbus Register Tables
located at www.predig.com for details.

When using more than one totalizer in a multi-drop
mode, each totalizer must be provided with its own
unique address. The meter address (Slave ID) may
be programmed between 1 and 247. The transmit
delay may be set between 0 and 199 ms. The parity
can be set to even, odd, or none with 1 or 2 stop bits.

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Select Menu (SElect)

The Select menu is used to select the input signal conditioner applied to the inputs (linear, square root, or
programmable exponent), math function for A & B, constants, low-flow cutoff, total count direction (up or down from a
preset amount), and analog output programming. Multi-point linearization is part of the linear function selection.

Input Signal Conditioning (Functn)

The Function menu is used to select the input signal
conditioner applied to the input signal: linear, square
root, or programmable exponent. Multi-point
linearization is part of the linear function selection.
Each input channel input signal conditioner is
programmed independently.

Totalizers 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 (Square)

The square root function is used to calculate flow
measured with a differential pressure transmitter. The
flow rate is proportional to the square root of the
differential pressure. Scale the totalizer so that the
low input signal (e.g. 4 mA) is equal to zero flow and
the high input signal (e.g. 20 mA) is equal to the
maximum flow.

Programmable Exponent Linearization (Prog E)

The programmable exponent function is used to
calculate open-channel flow measured with a level
transmitter in weirs and flumes. The flow rate is
proportional to the head height. Scale the totalizer so
that the low input signal (e.g. 4 mA) is equal to zero
flow and the high input signal (e.g. 20 mA) is equal to
the maximum flow. This method works well for all
weirs and flumes that have a simple exponent in the
flow calculation formula. For weirs and flumes with
complex exponents it is necessary to use a strapping
table and the 32-point linearization of the totalizer.

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Multi-Point Linearization (Linear)

Totalizers are set up at the factory for linear function
with 2-point linearization. Up to 32 linearization points
can be selected for each channel under the linear
function. The multi-point linearization can be used to
linearize the display for non-linear signals such as
those from level transmitters used to measure volume
in odd-shaped tanks or to convert level to flow using
weirs and flumes with complex exponent.

Note: After Scale is displayed continue pressing the Enter
button until the totalizer completes the scaling of the input
and display values.

Math Function (nmath)

The Math menu is used to select the math function
that will determine the channel C value. These math
functions are a combination of input channels A and
B, and will display when channel C is selected in the
Display menu.

A and B refer to the rate of channel A and B. tA and
tB refer to the totals of channel A and B. GtA and GtB
refer to the grand totals of channel A and B. The
following math functions are available.

Function

Display

Description

Sunm

Sum

C = (A+B+P)*F

Dif

Difference

C = (A-B+P)*F

difabs

Absolute
difference

C = ((Absolute value of
(A-B))+P)*F

AVg

Average

C = (((A+B)/2)+P)*F

nmulti

Multiplication

C = ((A*B)+P)*F

DiVide

Divide

C = ((A/B)+P)*F

Hi-ab

Max of A or B

C = ((High value of
channel A or B)+P)*F

Lo-ab

Min of A or B

C = ((Low value of
channel A or B)+P)*F

Drauw

Draw

C = ((A/B)-1)*F

uw Avg

Weighted avg.

C = ((B-A)*F)+A

ratio

Ratio

C = (A/B)*F

Ratio2

Ratio 2

C = ((B-A)/A)+P*F

Concen

Concentration

C = (A/(A+B))*F

Sunm t

Sum total

C = (tA+tB+P)*F

Sunmgt

Sum grand total

C = (GtA+GtB+P)*F

Dif t

Difference of
total

C = (tA-tB+P)*F

Dif gt

Diff. of grand
total

C = (GtA-GtB+P)*F

Tratio

Total ratio

C = (tA/tB)*F

t-rat2

Total ratio 2

C = ((tB-tA)/tA)*F

T pct

Total percent

C = (tA/(tA+tB))*100

Math Constants (Const)

The Math Constants menu is used to set the
constants used in channel C math. The math
functions include adder constant P, and factor
constant F.

The Adder constant (P) may be set from -99.999 to

999.999.

The Factor constant (F) may be set from 0.001 to

999.999.

The chart on page 56 details the math functions that
may be selected in the Math Function menu.

Low-Flow Cutoff (CutofF)

The low-flow cutoff feature allows the totalizer to be
programmed so that the often-unsteady output from a
differential pressure transmitter, at low flow rates,
always displays zero on the totalizer. The low-flow
cutoff for each channel is programmed independently.
The cutoff can be disabled to display negative values.

The cutoff value may be programmed from 0.1 to

999999. The totalizer will display zero below the cutoff

value. Programming the cutoff value to zero disables
the cutoff feature. The cutoff can be disabled to
display negative values.

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Totalizer Count Up/Down (Count)

The totalizer count up/down menu may be used to program the total and grand total to either count up from 0 when
reset or count down from a programmed value when reset. Total and grand total may have their countdown numbers
programmed individually from 0 to 999999.

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Analog Output Programming (AoutPr)

The Analog Output Programming menu is used to
program the behavior of the 4-20 mA output. The
following parameters and functions are programmed
in this menu:

1. Source: Source for generating the 4-20 mA
output

2. Overrange: Analog output value with display in
overrange condition

3. Underrange: Analog output value with display in
underrange condition

4. Break: Analog output value when loop break is
detected

5. Max: Maximum analog output value allowed
regardless of input

6. Min: Minimum analog output value allowed
regardless of input

Analog Output Source

The analog output source can be based on either of
the input channel rate, total, or grand totals (Ch-A,
Ch-B), the math channel (Ch-C), maximum stored
value of either input channel (Hi-A, Hi-B), minimum
stored value of either input channel (Lo-A, Lo-B),
relay set points, or the Modbus input.

To base an analog output on the rate, total, or grand
total of channels A or B, select the channel in the
Analog Output Source menu. Then select the rate,
total, or grand total as the source reference for the
output, and program the output scale.

Analog Output Value for Loss of 4-20 mA Input (Loop Break)

The AoutPr - Break menu is used to force the analog
output to go to a user-specified mA value if a break
condition is detected in the 4-20 mA input loop.
Selecting Ignore causes the mA output to go to the
minimum value.

Analog Output Calibration

To perform the analog output calibration, it’s

recommended to use a milliamp totalizer with a
resolution of at least 0.1 µA to measure the output
current. The values saved internally during this
procedure are used for scaling the 4-20 mA output in
the Setup menu.

Analog Output Calibration Procedure

1. Wire the PD8-6262 4-20 mA output to a current
loop that includes a power supply (internal or
external 12 to 24 VDC), and the mA input on the
digital totalizer. See Figure 18. 4-20 mA Output
Connections on page 27 for details.

2. Turn on all devices. Allow for a 15 to 30 minute
warm-up.

3. Go to the Advanced Features menu, navigate to
Select (Select) and choose Analog Output
Programming (AoutPr)/Calibration (Calib) menu
and press Enter.

4. The display will show 4 nmA. The PD8-6262 mA
output should now be close to 4 mA. Press Enter
and the display will show 04.000. Enter the actual
value read by the digital mA totalizer and press
Enter.

5. The display will show 20 nmA. The PD8-6262 mA
output should now be close to 20 mA. Press
Enter and the display will show 20.000. Enter the
actual value read by the digital mA totalizer and
press Enter.

6. The totalizer will now calculate the calibration
factors and store them.

7. Press Menu to exit and return to Run mode.

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Programmable Function Keys User Menu (user)

The User menu allows the user to assign the
programming buttons function keys F1, F2, and F3,
the digital input F4 (located on the input signal
connector), and four digital inputs (located on the
digital I/O connector) to access most of the menus or
to activate certain functions immediately (e.g. reset
totals, reset max & min, hold relay states, etc.). This
allows the totalizer to be greatly customized for use in
specialized applications.

The four digital outputs can be assigned to a number
of actions and functions executed by the totalizer (i.e.
alarms, relay acknowledgement, reset totals, reset
max, min, or max & min, tare, and reset tare). The
digital outputs can be used to trigger external alarms
or lights to indicate these specific events.

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

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Function Keys & Digital I/O Available Settings

Refer to the following table for descriptions of each
available function key or digital I/O setting.

Function Keys & Digital I/O Available Settings

Display

Description

Rst Hi

Reset the stored maximum display
values for all channels

Rst Lo

Reset the stored minimum display
values for all channels

Rst HL

Reset the stored maximum &
minimum display values for all
channels

relay

Directly access the relay menu

Set 1*

Directly access the set point menu for
relay 1 (*through 4)

Rly d

Disable all relays until a button
assigned to enable relays (Rly E) is
pressed

Rly E

Enable all relays to function as they
have been programmed

O Hold

Hold current relay states and analog
output as they are until a button
assigned to enable relays (Rly E) is
pressed

d Hold

Hold the current display value, relay
states, and analog output
momentarily while the function key or
digital input is active. The process
value will continue to be calculated in
the background.

D AbC

Scrolls values for A, B & C when
activated. Keeps the last value for 10
seconds and then it returns to its
assignment. Values are displayed on
display line 1 and the corresponding
channel and units on display line 2.

d tot

Scrolls through totals for channels A,
B, and C (which is the sum of A and
B). Values are displayed on display
line 1.

D gtot

Scrolls through grand totals for
channels A, B, and C (which is the
sum of A and B). Values are
displayed on display line 1.

Ln1 Hi

Display maximum channel A display
value on line 1

Ln1 Lo

Display minimum channel A display
value on line 1

Ln1 HL

Display maximum & minimum
channel A display values on line 1

Ln2 Hi

Display maximum channel B display
value on line 2

Ln2 Lo

Display minimum Channel B display
value on line 2

Ln2 HL

Display maximum & minimum
channel B display values on line 2

Function Keys & Digital I/O Available Settings

Display

Description

Ln2 HC

Display minimum channel C display
value on line 2

Ln2 HC

Display maximum & minimum
channel C display values on line 2

LitHLC

Display maximum channel C display
value on line 2

F On 1*

Force relay 1 (*through 4) into the on
state. This function is used in
conjunction with a digital input to
achieve interlock functionality. See

Setting Up the Interlock Relay (Force
On) Feature page 49 for details about

interlock relays.

Contrl

Directly access the Manual Control
menu

disabl

Disable the selected function key or
digital I/O

AcH

Acknowledge all active relays that are
in a manual operation mode such as
auto-manual or latching

Reset

Directly access the reset menu

Rst t

Reset totals for all channels

Rst gt

Reset grand totals for all channels

Rst ta

Reset total for channel A

Rst ga

Reset grand total for channel A

Rst tb

Reset total for channel B

Rst gb

Reset grand total for channel B

nmenu

Mimic the menu button functionality
(digital inputs only)

rigHt

Mimic the right arrow/F1 button
functionality (digital inputs only)

up

Mimic the up arrow/F2 button
functionality (digital inputs only)

Enter

Mimic the enter/F3 button
functionality (digital inputs only)

Alnm 1*

Provide indication when alarm 1
(*through 4) has been triggered
(digital outputs only)

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Internal Calibration (ICAL)

The totalizer is factory calibrated prior to

shipment for milliamps and volts with calibration

equipment that is certified to NIST standards.

The use of calibrated signal sources is necessary to
perform the internal calibration of the totalizer.

Check calibration of the totalizer at least every
12 months. Each input and input type must be
recalibrated separately.

Notes:

1. If totalizer is in operation and it is intended to accept
only one input type (e.g. 4-20 mA), recalibration of other
input is not necessary.

2. Allow the totalizer to warm up for at least 15 minutes
before performing the internal calibration procedure.

The Internal calibration menu is part of the Advanced
Features menu.

1. Press and hold the Menu button for three
seconds to access the advanced features of the
totalizer.

2. Press the Up arrow button to scroll to the Internal
calibration menu (ICAL) and press Enter.

3. Select channel A (Ch-A) or channel B (Ch-b) and
press enter.

4. The totalizer displays either current calibration
(C CAL) or voltage calibration (V CAL), according
to the input setup. Press Enter to start the
calibration process.

Example of Internal Calibration for current
input:

5. The totalizer displays low input current message
(C lo). Apply the low input signal and press
Enter. The display flashes for a moment while the
totalizer is accepting the low input signal.

6. After the display stops flashing, a number is
displayed with the leftmost digit brighter than the
rest. The bright digit is the active digit that can be
changed by pressing the Up arrow button. Press
the Right arrow button to move to the next digit.

7. Set the display value to correspond to the input
signal being calibrated, typically 4.000 mA.

8. The display moves to the high input calibration
(C Hi). Apply the high input signal and press
Enter.

9. Set the display for the high input calibration, in
the same way as it was set for the low input
calibration, typically 20.000 mA.

The graphic above shows the calibration of the
current input. The voltage input is calibrated in a
similar way.

Tips:

• Low and high input signals can be any valid
values within the range of the totalizer.

• Observe minimum input span requirements
between input 1 and input 2.

• Low input should be less than high input
signal.

Error Message (Error)

An error message indicates that the calibration or
scaling process was not successful.

After the error message is displayed, the totalizer
reverts to input 2 during calibration or scaling and to
input 1 during internal calibration, allowing the
appropriate input signal to be applied or programmed.

The error message might be caused by any of the
following conditions:

1. Input signal is not connected to the proper
terminals, or it is connected backwards.

2. Wrong signal selection in Setup menu.

3. Minimum input span requirements not
maintained.

Minimum Input Span

The minimum input span is the minimum difference
between input 1 and input 2 signals required to
complete the calibration or scaling of the totalizer.

Input Range

Input 1 & Input 2 Span

4-20 mA

0.15 mA

10 VDC

0.10 VDC

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Totalizer Operation

When installed, the primary way to operate the
totalizer is with the SafeTouch through-glass buttons
that allow the user to perform various operations
without removing the cover and exposing the
electronics to the hazardous environment. The user
can also operate the totalizer by connecting a suitable
control station or switch to one of the digital inputs
that can be used to perform various operations on the
totalizer based on the Programmable Function Keys.
Finally, certain operations can be performed on the
totalizer with MeterView Pro software or through
Modbus commands.

The two default operations that can be performed with
the totalizer’s SafeTouch buttons are:

1. Display the maximum and minimum readings

2. Acknowledge the relays

In addition, the user can program the SafeTouch
Buttons to perform a variety of useful operations by
reassigning them to other functions per Function Keys
& Digital I/O Available Settings on page 60.

Button Operation

The following table shows the default operations for
the F1, F2, and F3 SafeTouch Buttons, Displaying
and resetting the maximum and minimum values and
resetting the relays:

To learn more about SafeTouch buttons,
see this video:

predig.com/videos/Safetouch_Buttons

SafeTouch Buttons

The ProtEX-MAX is equipped with four sensors that
operate as through-glass buttons so that it can be
programmed and operated without removing the cover
(and exposing the electronics) in a hazardous area.

These buttons can be disabled for security by
selecting DISABLE on the switch labeled
NO-CONTACT BUTTONS located on the connector
board.

To actuate a button, press one finger to the glass
directly over the marked button area. Then retract
finger more than three inches from the glass before
pressing the next button. When the cover is removed,
the four mechanical buttons located next to the
sensors are used. The sensors are disabled when a
mechanical button is pressed and will automatically
be re-enabled after 60 seconds of inactivity.
The SafeTouch Buttons are designed to filter normal
levels of ambient interference and to protect against
false triggering, however, it is recommended that the
SafeTouch Buttons be disabled (slide switch to
DISABLE) if there is an infrared interference source in
line-of-sight to the display.

The SafeTouch Buttons are configured by default to
duplicate the function of the front panel mechanical
pushbuttons associated with the integrated totalizer.
The symbols by each SafeTouch button correspond
to a mechanical button as shown in the table to the
left.

SafeTouch Button Tips:

• To the extent possible, install the display facing
away from sunlight, windows, reflective objects,
and any sources of infrared interference.

• Keep the glass window clean.

• Tighten the cover securely.

• Use a password to prevent tampering.

Button Symbol

Description

Press to enter or exit
Programming Mode, view
settings, or exit max/min
readings

Press to reset max/min readings
or other parameter/function
assigned through the User menu

Press to display max/min
readings or other
parameter/function assigned
through the User menu

Press to acknowledge relays or
other parameters/function
assigned through the User menu

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

63

Function Keys Operation

During operation, the programmable function keys
operate according to the way they have been
programmed in the Advanced Features – User menu.
See Programmable Function Keys User Menu (user)
on page 59 for details.

The table on page 62 shows the factory default
settings for F1, F2, and F3.

Digital Inputs Operation

Five (5) digital inputs, F4, DI-1 to DI-4, come standard
on the totalizer. These digital inputs are programmed
identically to function keys F1, F2, and F3. The inputs
are triggered with a contact closure to +5 V in the
case of digital inputs 1-4 or with an active high signal,
see Digital Inputs Operation on page 63 for details.
The F4 is triggered with a contact closure to COM or
with an active low signal. During operation, digital
inputs operate according to the way they are
programmed in the Advanced Features – User menu.
See Programmable Function Keys User Menu (user)
on page 59 for details.

Maximum/Minimum Readings

The max & min readings (peak & valley) reached by
the process can be displayed either continuously or
momentary:

1. Display briefly by assigning to the F1-F3
function keys or to the digital inputs in the
User menu.

2. Display continuously by assigning either
display to max/min through the Display
menu.

Any of the F1-F3 function keys (buttons) and the
digital inputs can be programmed to reset the max &
min readings. The totalizers are set at the factory to
display the max/min reading by pressing the Up
arrow/F2 button and to use the Right arrow/F1 button
to reset the max/min.

To display max and min channel A reading using
function key with factory defaults:

1. Press Up arrow/F2 button to display minimum
reading of channel A since the last
reset/power-up. The display will then display the
maximum reading of channel A since the last
reset/power-up.

2. To reset max/min press Right arrow/F1 button.
The max & min displays are reset to actual
values.

3. Press Menu to exit max/min display reading.

Total Reset Capabilities

The user may reset the total via a SafeTouch button,
the F4 terminal at the back of the meter, an external
contact closure on the digital inputs, automatically via
user selectable preset value and time delay, or
through serial communications.

Total Reset via SafeTouch Button

The three through-glass SafeTouch button 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 without opening the enclosure
cover and without the need for external devices. Of
course, if the total or grand total is password protected,
they will not reset when the function key is pressed.

Total Reset via F4 Terminal

The PD8-6262 includes a digital input (referred to as
the F4 terminal) located on the back of the electronics
module as standard that can be used to reset the total
or grand total, among other things. This is the preferred
method for externally resetting the total or grand total
because it does not interfere with the operation of the
SafeTouch buttons for programming as described
below in the Total Reset via Digital Input section.

Total Reset via Digital Input

In addition to the F4 digital input described above, the
PD8-6262 also includes four digital inputs that can be
used to reset the total or grand total. However, if a
digital input is used to reset the total, or for some
other purpose, the corresponding through-glass
SafeTouch button will function as a programming key.

Total Reset via Preset Value

The total and grand total can be programmed for
automatic reset based on a preset value determined
by the user. In the automatic reset mode, a
programmable time delay is available to reset the total
or grand total after the assigned preset is reached.

Total Reset via Serial
Communications

The total and grand total can be reset via serial
communications such as a Modbus command or
MeterView Pro.

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

64

Troubleshooting

The rugged design and the user-friendly interface of
the totalizer should make it unusual for the installer or
operator to refer to this section of the manual.
However, due to the many features and functions of
the totalizer, it’s possible that the setup of the totalizer
does not agree with what an operator expects to see.

If the totalizer is not working as expected, refer to the
Diagnostics menu and recommendations below.

Diagnostics Menu (diag)

The Diagnostics menu is located in the Advanced
Features menu. To access the Diagnostics menu, see
Advanced Features Menu on page 52.

This menu allows the user to test the functionality of
all the totalizer LEDs, check the totalizer’s software
and version information, and erase the MeterView Pro
software installation files from the totalizer. Press the
Enter button to view the settings and the Menu button
to exit at any time.

For a description of the diagnostic messages, see
Advanced Features Menu & Display Messages on
page 52.

Testing the Display LEDs

To test all LEDs on the display:

1. Go to the Diagnostics menu (diAG) and

press Enter button.

2. Press Up arrow button and scroll to

LED Test menu (led t)

3. Press the Enter button to activate the LED

Test. The totalizer will cycle through all
digits, decimal points, and relay indicators to
enable the operator to check that all LEDs
are functioning properly.

4. Press the Enter button again to access the

Information menu (info) or press the Menu
button to return to Run Mode.

Determining Software Version

To determine the software version of a totalizer:

1. Go to the Diagnostics menu (diAG) and

press Enter button.

2. Press Up arrow button and scroll to

Information menu (Info).

3. Press Enter to access the software number

(SFT) and version (UER) information. Write
down the information as it is displayed.
Continue pressing Enter until all the
information is displayed.

4. The totalizer returns to Run Mode after

displaying all the settings.

Reset Totalizer to Factory Defaults

When the parameters have been changed in a way

that is difficult to determine what’s happening, it might

be better to start the setup process from the factory
defaults.

Instructions to load factory defaults:

1. Enter the Advanced Features menu. See
Advanced Features Menu, page 52.

2. Press Up arrow to go to Diagnostics menu

3. Press and hold Right arrow for three seconds,
press
Enter when display flashes reset.

Note: If Enter is not pressed within three seconds, the
display returns to Run Mode.

4. The totalizer goes through an initialization
sequence (similar as on power-up), and loads the
factory default settings.

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

65

Factory Defaults & User Settings

The following table shows the factory setting for most
of the programmable parameters on the totalizer.

Factory Defaults & User Settings

Parameter

Display

Default Setting

Input type

Input

Input type, channel A

Ch-A

4-20 mA

Input type, channel B

Ch-B

4-20 mA

Total, channel A

Ch-A

Yes

Total, channel B

Ch-B

Yes

Units

units

Rate unit, channel A

Ch-A

mA-A

Rate unit, channel B

Ch-B

mA-b

Unit, channel C

Ch-C

mA-C

Total unit, channel A

Tot-A

tot-A

Grand total unit, ch-A

Gtot-A

Gtot-A

Total unit, channel B

Tot-b

tot-b

Grand total unit, ch-B

Gtot-b

Gtot-B

Decimal Point

Dec pt

Rate, channel A

rate

3

Total, channel A

Total

1

Grand total, channel A

gtotal

0

Rate, channel B

rate

3

Total, channel B

Total

1

Grand total, channel B

gtotal

0

Channel C

Ch-C

3

Number of points

No pts

Number of points, ch A

Ch-A

2

Number of points, ch B

Ch-B

2

Scaling, (channel A)

Scal a

Input 1, channel A

InP 1

4.000 mA

Display 1, channel A

Dis 1

4.000

Input 2, channel A

InP 2

20.000 mA

Display 2, channel A

Dis 2

20.000

Scaling (channel B)

Scal b

Input 1, channel B

InP 1

4.000 mA

Display 1, channel B

Dis 1

4.000

Input 2, channel B

InP 2

20.000 mA

Display 2, channel B

Dis 2

20.000

Total setup

Tsetup

Time base, channel A

Tbase

Sec

Total conversion factor,
Ch-A

T CF

1.000

Grand total conversion
factor, Ch-A

Gt CF

1.000
Time base, channel B

Tbase

Sec

Factory Defaults & User Settings

Parameter

Display

Default Setting

Total conversion factor,
Ch-B

T CF

1.000

Grand total conversion
factor, Ch-B

Gt CF

1.000
Total reset

Treset

Total reset, channel A

T rst

Manual

Grand total reset, Ch-A

Gt rst

Manual

Total reset, channel B

T rst

Manual

Grand total reset, Ch-B

Gt rst

Manual

Display assignment

Dsplay

Display line 1

D Ch-A

Channel A

Display line 2

d Ch-B

Channel B

Display intensity

d-Inty

6

Relay

Relay

Relay 1 assignment

Ch-A

Channel A total

Relay 1 action

Act 1

Automatic

Relay 1 set point

Set 1

100.0

Relay 2 assignment

Ch-A

Channel A total

Relay 2 action

Act 2

Automatic

Relay 2 set point

Set 2

200.0

Relay 3 assignment

Ch-A

Channel A rate

Relay 3 action

Act 3

Automatic

Relay 3 set point

Set 3

3.000

Relay 3 reset point

RSt 3

2.500

Relay 4 assignment

Ch-A

Channel A rate

Relay 4 action

Act 4

Automatic

Relay 4 set point

Set 4

4.000

Relay 4 reset point

RSt 4

3.500

Fail-safe relay 1 to 4

Fls 1

Off

On delay relay 1 to 4

On 1

0.0 sec

Off delay relay 1 to 4

Off 1

0.0 sec

Loop break relay 1 to 4

ignore

Ignore

Analog output

Aout

Display 1 analog out

Dis 1

4.000

Output 1 value

Out 1

4.000 mA

Display 2 analog out

Dis 2

20.000

Output 2 value

Out 2

20.000 mA

Source analog output

Source

Channel A

Overrange output

O-rang

21.000 mA

Underrange output

u-rang

3.000 mA

Loop break output

break

3.000 mA

Maximum output

nmAx

23.000 mA

Minimum output

nmin

3.000 mA

Filter

Filter

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

66

Factory Defaults & User Settings

Parameter

Display

Default Setting

Filter, channel A

Ch-A

70

Filter, channel B

Ch-B

70

Bypass, channel A

bypass

0.2

Bypass, channel B

bypass

0.2

Round

Round

1

Cutoff

Cutoff

Cutoff value, channel A

Ch-a

0.0 (disabled)

Cutoff value, channel B

Ch-b

0.0 (disabled)

Serial

Serial

Slave ID (Address)

SlaVId

247

Baud rate

baud

9600

Transmit delay

Tr dly

50 ms

Parity

Parity

Even

Byte-to-byte timeout

t-byt

010 (0.1 sec)

Math

nmath

Math, channel C

Sunm

Sum

Adder (constant P)

Adder

0.000

Factor (constant F)

Factor

1.000

User

user

F1 function key

F1

Reset max & min

F2 function key

F2

Line 1 Max & Min

F3 function key

F3

Acknowledge relays

F4 function
(digital input)

F4

Acknowledge relays
Digital input 1

DI 1

Menu

Digital input 2

DI 2

Right arrow

Digital input 3

DI 3

Up arrow

Digital input 4

DI 4

Enter

Digital output 1

DO 1

Alarm 1

Digital output 2

DO 2

Alarm 2

Digital output 3

DO 3

Alarm 3

Digital output 4

DO 4

Alarm 4

Password

pass

Password 1

Pass 1

000000 (unlocked)

Password 2

Pass 2

000000 (unlocked)

Password 3

Pass 3

000000 (unlocked)

Total

Total

000000 (unlocked)

Grand total

gtotal

000000 (unlocked)

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

67

Troubleshooting Tips

This totalizer is a highly sophisticated instrument with an extensive list of features and capabilities. If the front panel
buttons are used to program the totalizer, it may be a difficult task to keep everything straight. That is why we strongly
recommend the use of the free MeterView Pro software for all programming activities. A USB cable is provided with
the totalizer for programming with MeterView Pro software.

If you have programmed the totalizer with the front panel buttons and it is not working as intended, try
re-programming the totalizer using MeterView Pro software.

Symptom

Check/Action

No display at all

Check power at power connector

Not able to change setup or
programming, Locd is displayed

Totalizer is password-protected, enter correct six-digit password to unlock

Totalizer does not respond to input
change

If a Low-Flow Cutoff Value has been programmed, the totalizer will display
zero below that point, regardless of the input – which can appear like the
totalizer is not responding to an input change. Check to make sure the
problem is not being caused by an undesired low-flow cutoff value.
To prevent the display from showing a negative value, set the low-flow
cutoff to a value greater than zero.

Totalizer displays error message during
calibration (Error)

Check:

1. Signal connections

2. Input selected in Setup menu

3. Minimum input span requirements

Totalizer displays

1. 999999

2. -99999

Check:

1. Input selected in Setup menu

2. Corresponding signal at Signal connector

Display is unstable

Check:

1. Input signal stability and value

2. Display scaling vs. input signal

3. Filter and bypass values (increase)

Display response is too slow

Check filter and bypass values

Display reading is not accurate

Check:

1. Input signal conditioner selected: Linear, square root, etc.

2. Scaling or calibration

Display does not respond to input
changes, reading a fixed number

Check:

1. Display assignment, it might be displaying max, min, or set point.

Display alternates between

1. Hi and a number

2. Lo and a number

Press Menu to exit max/min display readings.

Relay operation is reversed

Check:

1. Fail-safe in Setup menu

2. Wiring of relay contacts

Relay and status LED do not
respond to signal

Check:

1. Relay action in Setup menu

2. Set and reset points

Flashing relay status LEDs

Relays in manual control mode or relay interlock switches opened.

Totalizer not communicating with
application programs

Check:

1. Serial adapter and cable

2. Serial settings

3. Meter address and baud rate

If the display locks up or the totalizer
does not respond at all

Cycle the power to reboot the microprocessor.

PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer

Instruction Manual

68

Troubleshooting Tips

Symptom

Check/Action

SafeTouch buttons do not respond

1. If mechanical button was pushed, the SafeTouch buttons will
be re-enabled automatically 60 seconds after the last button
push.

2. If slide switch on connector board is in DISABLE position,
switch to ENABLE.

3. Strong direct sunlight may interfere with SafeTouch button
operation. It is recommended to operate the buttons by
standing so as to block direct sunlight.

Serial Communications METER LED Indicator is
off

Check:

1. Modular cable connection

2. Power to the device

If only the TX (or DATA IN) data status LED is
flashing when serial communications attempted

Check:

1. Serial cable

2. Instrument address & baud rate

3. Program address & baud rate

If both data status LEDs (TX and RX) are off
when trying to communicate

Remove all unnecessary cables and instruments from the bus.
Try getting the system to work with only one device (to ease
troubleshooting) and then expand the system one device at a time.

Communications slow

Increase the baud rate

Random communication errors

1. Increase the TX delay time

2. Decrease the baud rate

Other symptoms not described above

Call Technical Support for assistance.

Note: Certain sequences of events can cause unexpected results. To solve these issues, it is best to start fresh from factory
defaults and use the manual as a step by step programming guide, rather than a random approach to programming. To reset the
totalizer to factory defaults, see Reset Totalizer to Factory Defaults on page 64. In addition, for best results, we recommend using
the free MeterView Pro software for all programming needs.

69

PD8-6262 Explosion-Proof Dual Analog Input Rate/Totalizer

Instruction Manual

PRECISION DIGITAL CORPORATION

233 South Street • Hopkinton MA 01748 USA
Tel [phone] • Fax [phone]

www.predig.com

LIM8-6262_F

SFT039 Ver 3.100 & up

07/22

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Email: [email protected]

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