Precision Digital Corporation ProtEx MAX PD8-6363 User manual

PD8-6363 Explosion-Proof Dual Pulse 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 Pulse Input Flow Rate/Totalizers
•Dual Pulse, Open Collector, NPN, PNP, TTL, Switch Contact, Sine Wave (Coil), Square Wave Inputs
•Rate, Total, and Grand Total for Each Input Channel
•Display Rate & Total at the Same Time
•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 5, 10 or 24 VDC Flowmeter Power Supply
•Gate Function for Display of Slow Pulse Rates
•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
•Total, Grand Total or Non-Resettable Grand Total
•Front Panel or Remote Total Reset
•Password Protection for Programming and Total Reset
•Total Stored in Non-Volatile Memory
•K-Factor, Internal Scaling, or External Calibration
•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
•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

ProtEX-MAX PD8-6363 Dual Pulse Input Flow Rate/Totalizer
Instruction Manual
3
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 totalizer.
•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 totalizer 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 totalizer can be powered from the USB connection. When
using the USB connection, DO NOT apply AC or DC power to
the totalizer.
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 a 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 use a different 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. You don’t even have 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
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 totalizer 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 totalizer 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.

ProtEX-MAX PD8-6363 Dual Pulse Input Flow Rate/Totalizer
Instruction Manual
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Table of Contents
Introduction......................................................................................................... 7
Ordering Information.......................................................................................... 7
Key Features....................................................................................................... 9
Specifications................................................................................................... 12
General.......................................................................................................... 12
Dual Pulse Inputs......................................................................................... 13
Dual Rate/Totalizer....................................................................................... 14
Relays............................................................................................................ 14
USB Connection........................................................................................... 14
Isolated 4-20 mA Transmitter Output Option............................................. 15
RS-485 Serial Communications .................................................................. 15
Modbus®RTU Serial Communications....................................................... 15
Digital Input (F4)........................................................................................... 15
Digital Inputs & Outputs .............................................................................. 15
MeterView Pro Software .............................................................................. 15
Compliance Information................................................................................... 16
Electromagnetic Compatibility.................................................................... 16
Product Ratings and Approvals.................................................................. 16
EU Declaration of Conformity.......................................................................... 17
Safety Information............................................................................................ 17
Installation......................................................................................................... 17
Unpacking..................................................................................................... 17
Mounting....................................................................................................... 18
Installation Overview........................................................................................ 20
MeterView Pro Software .............................................................................. 20
Flowmeter Supply Voltage Selection (P+, P-) ................................................ 21
Connections ................................................................................................. 21
Required & Factory Wired Connection....................................................... 21
PROVU Electronics Module Layout............................................................. 22
USB Connection ........................................................................................ 22
Power Connections.................................................................................... 23
Signal Connections.................................................................................... 24
Configure Input Type and Level Switches.................................................. 25
Relay Connections..................................................................................... 25
Interlock Relay Feature.............................................................................. 25
Switching Inductive Loads.......................................................................... 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
Setup and Programming.................................................................................. 28
Overview....................................................................................................... 28
LED Status Indicators.................................................................................. 28
Programming Buttons ................................................................................. 29
SafeTouch Buttons ...................................................................................... 29
Display Functions & Messages................................................................... 30
Main Menu..................................................................................................... 33
Setting Numeric Values............................................................................... 33
Setting Up the Totalizer (setup).................................................................. 34
Setting the Input Signal (Input)................................................................. 35
Setting the Totalizer Features (total)....................................................... 35
Setting the Dual-Input Mode (nmode)......................................................... 35
Setting the Rate, Total, & Grand Total Units/Tags (units)........................ 37
Setting the Decimal Point (dEc pt) ........................................................... 37
Programming the Rate/Totalizer (prog)..................................................... 38
Setting the Display Parameters & Intensity (dsplay)................................. 41
Display Intensity (d-Inty).......................................................................... 41

ProtEX-MAX PD8-6363 Dual Pulse Input Flow Rate/Totalizer
Instruction Manual
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Setting the Relay Operation (relay)........................................................... 42
Setting the Relay Assignment (asSign)..................................................... 42
Setting the Relay Action (Act) ................................................................... 42
Programming Set and Reset Points........................................................... 43
Setting Fail-Safe Operation........................................................................ 43
Programming Time Delay .......................................................................... 43
Relay and Alarm Operation Diagrams........................................................ 44
High Alarm Operation (Set > Reset) .............................................................. 44
Low Alarm Operation (Set < Reset)........................................................... 44
High Alarm with Fail-Safe Operation (Set > Reset).................................... 44
Low Alarm with Fail-Safe Operation (Set < Reset)..................................... 44
Time Delay Operation................................................................................ 45
Total Relay Sampling Operation................................................................ 45
Pump Alternation Control Operation.......................................................... 46
Relay Operation Details............................................................................... 47
Overview.................................................................................................... 47
Relays Auto Initialization............................................................................ 47
Fail-Safe Operation.................................................................................... 47
Front Panel LEDs....................................................................................... 47
Latching and Non-Latching Relay Operation ............................................. 47
Non-Latching Relay (Auto)........................................................................ 48
Non-Latching Relay with Manual Reset (A-nman)...................................... 48
Latching Relay (LatcH).............................................................................. 48
Latching Relay with Clear (Lt-Clr)........................................................... 48
Acknowledging Relays............................................................................... 49
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
Gate Function (Gate)................................................................................. 53
Contact De-Bounce Filter (FiLter) ........................................................... 54
Rounding Feature (round)......................................................................... 54
Modbus RTU Serial Communications (serial)......................................... 54
Select Menu (SElect)................................................................................ 55
Input Signal Conditioning (Functn)............................................................ 55
Math Function (nmath)............................................................................... 56
Math Constants (Const)............................................................................. 56
Low-Flow Cutoff (CutofF).......................................................................... 56
Totalizer Count Up/Down (Count).............................................................. 57
Analog Output Programming (AoutPr) ...................................................... 57
Programmable Function Keys User Menu (user)...................................... 58
Totalizer Operation........................................................................................... 60
Button Operation.......................................................................................... 60
SafeTouch Buttons ...................................................................................... 60
Function Keys Operation............................................................................. 61
Digital Inputs Operation............................................................................... 61
Maximum/Minimum Readings..................................................................... 61
Troubleshooting............................................................................................... 62
Diagnostics Menu (diag)............................................................................. 62
Testing the Display LEDs........................................................................... 62
Determining Software Version ................................................................... 62
Reset Totalizer to Factory Defaults ............................................................ 62
Factory Defaults & User Settings............................................................... 63
Troubleshooting Tips................................................................................... 65

ProtEX-MAX PD8-6363 Dual Pulse Input Flow Rate/Totalizer
Instruction Manual
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Table of Figures
Figure 1. Enclosure Dimensions –Front View............................................... 18
Figure 2. Enclosure Dimensions –Side Cross Section View ....................... 18
Figure 3. Flowmeter Supply Voltage Selection.............................................. 21
Figure 4. Integrated PROVURequired Connections ....................................... 21
Figure 5. PROVUElectronics Module Layout.................................................. 22
Figure 6. USB Connection ............................................................................... 22
Figure 7. Power Connections.......................................................................... 23
Figure 8. Flowmeters Powered by Internal Power Supply............................ 24
Figure 9. Flowmeters Powered by External Supply....................................... 24
Figure 10. Self-Powered Magnetic Pickup Coil Flowmeter........................... 24
Figure 11. NPN open Collector Input .............................................................. 24
Figure 12. PNP Sensor Powered by Internal Supply ..................................... 24
Figure 13. Switch Input Connections.............................................................. 24
Figure 14. Relay Connections ......................................................................... 25
Figure 15. Interlock Connections.................................................................... 25
Figure 16. AC and DC Loads Protection......................................................... 25
Figure 17. Low Voltage DC Loads Protection................................................ 25
Figure 18. RS-485 Connection......................................................................... 26
Figure 19. Three-Wire RS-485 Connection..................................................... 26
Figure 20. Digital Input and Output Connections .......................................... 27
Figure 21. F4 Digital Input Connections......................................................... 27
Figure 22. 4-20 mA Output Connections ........................................................ 27
Figure 23. Analog Output Supply Powering Other Devices.......................... 27
Figure 24. Dual Input Mode (ud AB) ................................................................ 35
Figure 25. Dual Input Mode (ud AI) ................................................................ 35
Figure 26. Dual Input Mode (ud BI) ................................................................ 36
Figure 27. Dual Input Mode (quad 1) .............................................................. 36
Figure 28. Dual Input Mode (quad 2) .............................................................. 36
Figure 29. Dual Input Mode (quad 4) .............................................................. 36

ProtEX-MAX PD8-6363 Dual Pulse Input Flow Rate/Totalizer
Instruction Manual
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Introduction
The ProtEX-MAX PD8-6363 is an explosion-proof
dual pulse input rate/totalizer ideal for flow rate, total,
and flow control applications. The totalizer features a
dual-line display, with a main display of 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 totalizer accepts a wide variety of pulse signals
from two (2) pulse output flowmeters that can be
displayed as flow rate, total and grand total. 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.
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 PD8-6363 dual-input flow
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
PD8-6363-6H0
5 Digital Inputs,
4 Digital Outputs,
RS-485
Communications
No options
PD8-6363-6H7
4 relays
4-20 mA output
12-24 VDC Models
Model
Standard
Features
Options
Installed
PD8-6363-7H0
5 Digital Inputs,
4 Digital Outputs,
RS-485
Communications
No options
PD8-6363-7H7
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

ProtEX-MAX PD8-6363 Dual Pulse 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

ProtEX-MAX PD8-6363 Dual Pulse Input Flow Rate/Totalizer
Instruction Manual
9
Key Features
Connections for PD8-6363-6H7 & PD8-6363-7H7

ProtEX-MAX PD8-6363 Dual Pulse 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.

ProtEX-MAX PD8-6363 Dual Pulse 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 PD8-6363 in every regard except for the input signal
connector. See Figure 5 on page 22 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.
USB cable conveniently
plugs into side of
ProtEX-MAX meter

ProtEX-MAX PD8-6363 Dual Pulse Input Flow Rate/Totalizer
Instruction Manual
12
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
Rate: 10 per second; up to 1 per 100
seconds (and is a function of Low Gate
setting); Total: 10 per second (fixed)
LED Status
Indicators
See LED Status Indicators on page 28 for
details.
Overrange
Display flashes 999999
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 turned 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.
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
85-265VAC50/60Hz;90-265VDC,20Wmax;
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 meters may
share one 5 A fuse
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.
Mounting
Wall Mounting:
Four (4) mounting holes provided for
mounting totalizer to wall. See Wall Mounting
Instructions on page 18 for additional details.
Pipe Mounting:
Optional pipe mounting kit (PDA6848)
allows for pipe mounting. Sold separately.
See Pipe Mounting Instructions on page 19
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.

ProtEX-MAX PD8-6363 Dual Pulse Input Flow Rate/Totalizer
Instruction Manual
13
Dual Pulse Inputs
Two Inputs
Field selectable: Pulse or square wave
0-5 V, 0-12 V, or 0-24 V @ 30 kHz; TTL;
open collector 4.7 kpull-up to 5 V @
30 kHz; NPN or PNP transistor, switch
contact 4.7 kpull-up to 5 V @ 40 Hz;
Modbus PV (Slave)
Isolated
Flowmeter
Power Supply
Terminals P+ & P-: 24 VDC 10%
All models selectable for 24, 10, or 5 VDC
supply (internal jumper J4). All models
rated @ 25 mA max.
Refer to Flowmeter Supply Voltage
Selection (P+, P-) on page 21.
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.
Low Voltage
Mag Pickup
Sensitivity: 40 mVp-p to 8Vp-p
Minimum
Input
Frequency
0.001 Hz
Minimum frequency is dependent on high
gate setting.
Maximum
Input
Frequency
30,000 Hz (10,000 for low voltage mag
pickup)
Input
Impedance
Pulse input: Greater than 300 k@ 1 kHz.
Open collector/switch input: 4.7 kpull-up
to 5 V.
Input
Threshold
Low
High
1.6 V
3.3 V
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 & 2 and display
intensity
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
Temperature
Drift
Rate display is not affected by changes in
temperature.
Multi-Point
Linearization
2 to 32 points for channel A and B
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
May be calibrated using K-factor, scaling
without a signal source, or by applying an
external calibration signal.
K-Factor
Field programmable K-factor converts input
pulses to rate in engineering units. May be
programmed from 0.00001 to 999,999
pulses/unit.
Calibration
Range
Input 1 signal may be set anywhere in the
range of the totalizer; input 2 signal may be
set anywhere above or below input 1
setting.
Minimum input span between any two
inputs is 1.0 Hz for calibration and 0.1 Hz
for scaling. An error message will appear if
the input span is too small.
Filter
Programmable contact de-bounce filter:
40 to 999 Hz maximum input frequency
allowed with low speed filter.
Time Base
Second, minute, hour, or day
Gate
Low gate: 0.1-99.9 seconds
High gate: 2.0-999.9 seconds
3.3 V
1.6 V
0 V

ProtEX-MAX PD8-6363 Dual Pulse Input Flow Rate/Totalizer
Instruction Manual
14
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
Alarm Presets
Up to eight, 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 & 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.
Total Reset
Password
Total and grand total passwords may be
entered to prevent resetting the totals or
grand totals from the front panel.
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.
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 on page 25.
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 andindependent foreach 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.

ProtEX-MAX PD8-6363 Dual Pulse Input Flow Rate/Totalizer
Instruction Manual
15
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
Isolated
Transmitter
Power Supply
Terminals I+ & R: 24 VDC 10%. May be
used to power the 4-20 mA output or other
devices.
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 (Totalizer 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.
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 58 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 and reset max/min values. See
Function Keys & Digital I/O Available
Settings on page 58 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 meters 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.

ProtEX-MAX PD8-6363 Dual Pulse Input Flow Rate/Totalizer
Instruction Manual
16
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)
Power-
Frequency
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.
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.

ProtEX-MAX PD8-6363 Dual Pulse Input Flow Rate/Totalizer
Instruction Manual
17
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"
(450 mm) of the enclosure or within 2" (50 mm)
for Zone installations.
Wiring connectors are accessed by opening the
enclosure. To access electrical connectors,
remove the two (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.

ProtEX-MAX PD8-6363 Dual Pulse Input Flow Rate/Totalizer
Instruction Manual
18
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.

ProtEX-MAX PD8-6363 Dual Pulse Input Flow Rate/Totalizer
Instruction Manual
19
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

ProtEX-MAX PD8-6363 Dual Pulse Input Flow Rate/Totalizer
Instruction Manual
20
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.