Precision Digital Corporation ProtEX-MAX PD8-6000 User manual

ProtEX-MAX PD8-6000 Explosion-Proof Process Meter
Instruction Manual
PRECISION DIGITAL CORPORATION
233 South Street • Hopkinton MA 01748 USA
Tel [phone] • Fax [phone]
www.predig.com
•Fully-Approved Explosion-Proof Meter
•0-20 mA, 4-20 mA, 0-5 V, 1-5 V, and ±10 V Field Selectable Inputs with ±0.03% Accuracy
•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
•Display Input in Two Different Scales Simultaneously - Great for Level Applications
•Multi-Pump Alternation Control
•Round Horizontal Tank Function; Just Enter Diameter & Length
•32-Point Linearization, Square Root Extraction and Programmable Exponent Function
•Password Protection
•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)
•Pipe Mounting Kits
•Stainless Steel Tag Available
•3-Year Warranty
MeterView Pro
USB Install

2

ProtEX-MAX PD8-6000 Explosion-Proof Process Meter
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
programming buttons and the instructions in this
manual to do so.
•The meter should only be connected to a
computer while it is located in a safe area.

ProtEX-MAX PD8-6000 Explosion-Proof Process Meter
Instruction Manual
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Table of Contents
Introduction......................................................................................................... 7
Ordering Information.......................................................................................... 7
Key Features....................................................................................................... 9
Specifications................................................................................................... 17
General........................................................................................................... 17
Process Inputs.............................................................................................. 18
Relays ............................................................................................................ 18
USB Connection............................................................................................ 18
Isolated 4-20 mA Transmitter Output Option.............................................. 19
RS-485 Serial Communications................................................................... 19
Modbus®RTU Serial Communications ....................................................... 19
Digital Input (F4)............................................................................................ 19
Digital Inputs & Outputs............................................................................... 19
MeterView Pro Software............................................................................... 19
Compliance Information................................................................................... 20
Electromagnetic Compatibility .................................................................... 20
Product Ratings and Approvals .................................................................. 20
EU Declaration of Conformity.......................................................................... 21
Safety Information............................................................................................ 21
Installation......................................................................................................... 21
Unpacking...................................................................................................... 21
Mounting........................................................................................................ 22
Installation Overview.................................................................................... 24
MeterView Pro Software............................................................................... 24
Transmitter Supply Voltage Selection (P+, P-)........................................... 25
Connections.................................................................................................. 25
Required & Factory Wired Connection....................................................... 25
PROVUElectronics Module Layout............................................................. 26
USB Connection ........................................................................................ 26
Power Connections.................................................................................... 27
Signal Connections.................................................................................... 27
Relay Connections..................................................................................... 27
Switching Inductive Loads.......................................................................... 28
RS-485 Connections.................................................................................. 28
RS-485 Multi-Drop Connection.................................................................. 28
Digital I/O Connections .............................................................................. 29
F4 Digital Input Connections...................................................................... 29
4-20 mA Output Connections..................................................................... 29
Analog Output Power Supply..................................................................... 29
Remote Programming................................................................................ 30
Interlock Relay Feature.............................................................................. 30
Setup and Programming.................................................................................. 31
Overview........................................................................................................ 31
LED Status Indicators................................................................................... 31
Programming Buttons.................................................................................. 32
SafeTouch Buttons....................................................................................... 32
Display Functions & Messages ................................................................... 33
Main Menu ..................................................................................................... 34
Setting Numeric Values................................................................................ 35
Setting Up the Meter (setup)........................................................................ 35
Setting the Input Signal (Input)................................................................. 35
Setting the Display Units or Custom Tags (units).................................... 36
Setting the Decimal Point (dEc pt) ........................................................... 36
Programming the Meter (prog).................................................................. 37
Setting the Display Parameter & Intensity (dsplay) .................................. 39
Display Intensity (d-Inty).......................................................................... 39

ProtEX-MAX PD8-6000 Explosion-Proof Process Meter
Instruction Manual
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Setting the Relay Operation (relay)............................................................ 40
Setting the Relay Action............................................................................. 40
Programming Set and Reset Points........................................................... 41
Setting Fail-Safe Operation........................................................................ 41
Programming Time Delay .......................................................................... 41
Relay Action for Loss of 4-20 mA Input (Loop Break)................................ 41
Relay and Alarm Operation Diagrams......................................................... 41
High Alarm Operation (Set > Reset)............................................................. 41
Low Alarm Operation (Set < Reset)........................................................... 42
High Alarm with Fail-Safe Operation (Set > Reset).................................... 42
Low Alarm with Fail-Safe Operation (Set < Reset)..................................... 42
Time Delay Operation................................................................................ 42
Pump Alternation Control Operation.......................................................... 43
Relay Sampling Operation......................................................................... 43
Relay Operation Details................................................................................ 44
Overview.................................................................................................... 44
Relays Auto Initialization............................................................................ 44
Fail-Safe Operation.................................................................................... 44
Front Panel LEDs....................................................................................... 44
Latching and Non-Latching Relay Operation ............................................. 44
Non-Latching Relay (Auto)........................................................................ 45
Non-Latching Relay with Manual Reset (A-nman)...................................... 45
Latching Relay (LatcH).............................................................................. 45
Latching Relay with Clear (Lt-Clr)........................................................... 45
Acknowledging Relays............................................................................... 46
Pump Alternation Control Applications (Altern) ....................................... 46
Setting Up the Interlock Relay (Force On) Feature.................................... 47
Scaling the 4-20 mA Analog Output (Aout)................................................. 48
Reset Menu (reset) ...................................................................................... 48
Manual Control Menu (Contrl).................................................................... 48
Setting Up the Password (pass) .................................................................. 49
Protecting or Locking the Meter................................................................. 49
Making Changes to a Password Protected Meter...................................... 49
Disabling Password Protection .................................................................. 49
Advanced Features Menu............................................................................. 50
Advanced Features Menu & Display Messages......................................... 50
Noise Filter (filter) ................................................................................. 51
Noise Filter Bypass (bypass)..................................................................... 51
Rounding Feature (round)......................................................................... 51
Modbus®RTU Serial Communications (serial)....................................... 51
Select Menu (SElect)................................................................................ 52
Input Signal Conditioning (Functn)............................................................ 52
Low-Flow Cutoff (CutofF).......................................................................... 53
Analog Output Programming (AoutPr) ...................................................... 53
Programmable Function Keys User Menu (user)...................................... 54
Tare (tare)................................................................................................ 55
Internal Source Calibration (ICAL)............................................................. 55
Meter Operation................................................................................................ 56
Button Operation .......................................................................................... 56
SafeTouch Buttons....................................................................................... 57
Function Keys Operation ............................................................................. 57
Digital Inputs Operation ............................................................................... 57
Maximum/Minimum Readings...................................................................... 57
Troubleshooting............................................................................................... 58
Diagnostics Menu (diag).............................................................................. 58
Testing the Display LEDs........................................................................... 58
Determining Software Version ................................................................... 58
Reset Meter to Factory Defaults.................................................................. 58
Factory Defaults & User Settings............................................................... 59
Troubleshooting Tips ................................................................................... 60

ProtEX-MAX PD8-6000 Explosion-Proof Process Meter
Instruction Manual
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Table of Figures
Figure 1. Enclosure Dimensions –Front View............................................... 22
Figure 2. Enclosure Dimensions –Side Cross Section View ....................... 22
Figure 3. Transmitter Supply Voltage Selection ............................................ 25
Figure 4. Integrated PROVURequired Connections....................................... 25
Figure 5. PROVUElectronics Module Layout.................................................. 26
Figure 6. USB Connection ............................................................................... 26
Figure 7. Power Connections.......................................................................... 27
Figure 8. Transmitter Powered by Internal Supply........................................ 27
Figure 9. Transmitter Powered by External Supply or Self-Powered........... 27
Figure 10. Voltage Input Connections ............................................................ 27
Figure 11. Relay Connections ......................................................................... 27
Figure 12. AC and DC Loads Protection......................................................... 28
Figure 13. Low Voltage DC Loads Protection................................................ 28
Figure 14. RS-485 Connections....................................................................... 28
Figure 15. Three-Wire RS-485 Connections................................................... 28
Figure 16. Digital Input and Output Connections .......................................... 29
Figure 17. F4 Digital Input Connections......................................................... 29
Figure 18. 4-20 mA Output Connections ........................................................ 29
Figure 19. Analog Output Supply Powering Other Devices.......................... 29
Figure 20. Interlock Connections.................................................................... 30

ProtEX-MAX PD8-6000 Explosion-Proof Process Meter
Instruction Manual
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Introduction
The ProtEX-MAX PD8-6000 is an explosion-proof,
multi-purpose, easy to use, digital process meter ideal
for level, flow, temperature, pressure, or any other
process application. The meter 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 meter is
housed in a die-cast aluminum, field-mountable,
NEMA 4X/IP68 rated enclosure for convenient indoor
and outdoor installation.
The meter accepts current and voltage signals (e.g.
4-20 mA, 0-10 V) that can be scaled by the user for
any application. In addition, the analog input can be
scaled to display the process in two different scales;
for example, the main display could indicate level in
feet and the second display could indicate the volume
in gallons.
The ProtEX-MAX is available in two configurations:
display only and fully loaded. Both versions include a
24 VDC power supply to power the transmitter. A fully
loaded ProtEX-MAX PD8-6000-6H7 meter comes
with four SPDT relays, a 4-20 mA output, 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 such as pump alternation
control. 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.
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
Ordering Information
85-265 VAC Models
Model
Standard
Features
Options
Installed
PD8-6000-6H0
5 Digital Inputs,
4 Digital Outputs,
RS-485
Communications
No options
PD8-6000-6H7
4 relays
4-20 mA output
12-24 VDC Models
Model
Standard
Features
Options
Installed
PD8-6000-7H0
5 Digital Inputs,
4 Digital Outputs,
RS-485
Communications
No options
PD8-6000-7H7
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

ProtEX-MAX PD8-6000 Explosion-Proof Process Meter
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
4-20 mA Connections
This Tech Tips video shows how to make connections
to power the transmitter with the ProVu’s
(ProtEX-MAX’s) 24 VDC power supply.
predig.com/videos/4-20_mA_Connections
Use ProtEX-MAX for Pump Control
Learn how to use the ProVu (ProtEX-MAX) meter as
an explosion-proof pump controller. See how the four
relays can be used to alternate two pumps and
provide high and low alarms.
predig.com/videos/PumpControl

ProtEX-MAX PD8-6000 Explosion-Proof Process Meter
Instruction Manual
9
Key Features
Connections for PD8-6000-6H7 & PD8-6000-7H7
The Only Explosion-Proof Process Meter You Will Ever Need
Front, back and in between, the PD8-6000
ProtEX-MAX explosion-proof process meter boasts
specifications, features and functionality that make it
the only hazardous area process meter you will ever
need. The front panel push-buttons can even be
operated in a hazardous area without removing the
cover by using the SafeTouch through-glass feature.
The PD8-6000 has all the same features as our PD6000
1/8 DIN process meter, but it is not just a meter stuffed
in an explosion-proof enclosure like many of our
competitors offer. The PD8-6000 is approved as a
complete product by FM and CSA and also carries
IECEx approvals. Besides being suitable for
hazardous areas, the number one feature that makes
the PD8-6000 such a useful device is its built-in
24 VDC power supply to drive the transmitter as
illustrated by the above diagram. This feature not only
saves the cost of an external power supply, but also
greatly simplifies wiring. In addition, there is a second
25 mA power supply provided with the 4-20 mA
output option, evident also in the above diagram.
The first thing you notice about the PD8-6000 is its
modern looking, rugged, die cast aluminum housing
with convenient mounting flanges. Housed inside this
enclosure is a dual-line, 6-digit display with high-intensity
LEDs that can be read in direct sunlight. The main
line can display numbers up to 999,999 and the
second line can be used to indicate a tag or display
the input in another scale. This makes the PD8-6000
ideal for level and other applications where displaying
a big number is required.
Other key features include four relays and 4-20 mA
output option, advanced signal input conditioning like
automatic round horizontal tank linearization, function
keys, pump alternation capability, and Modbus®RTU
serial communications. Finally, all these features and
capabilities can easily be programmed without
removing the cover using SafeTouch buttons in a
hazardous area or with free MeterView Pro PC-based
software in a safe area.

ProtEX-MAX PD8-6000 Explosion-Proof Process Meter
Instruction Manual
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Easy Programming Methods
The ProtEX-MAX can be programmed in a hazardous
area with the through-glass SafeTouch buttons
without removing the cover, in a safe area with the
front panel push buttons with the cover removed, or in
a safe area with free, PC-based MeterView Pro
software. MeterView Pro is resident on the
ProtEX-MAX and is accessed by a provided USB
cable, so it is by far the easiest way to program the
ProtEX-MAX. The ProtEX-MAX can be calibrated
either by applying a known signal or scaled by
entering a desired value with the front panel buttons
or MeterView Pro software. Most customers will use
the scaling method because it is simpler and does not
require a calibrated signal source. Selecting the input
to be current or voltage is done with the front panel
buttons or MeterView Pro software. Once
programming is completed it can be locked with a
password.
The ProtEX-MAX comes preloaded with free
MeterView Pro programming software that connects
and installs directly to your PC with a standard USB
cable, also provided free with each instrument. This
eliminates the need to insert CDs, install drivers, or
download software from the internet. When you
connect your ProtEX-MAX to your PC, MeterView Pro
is downloaded to your PC, the software automatically
selects the model you are programming, and you’re
ready to start programming immediately. Further
simplifying the programming process, the
ProtEX-MAX can be powered from the USB port, so
no need to apply external power while programming
your meter. In addition to programming, the software
will also allow you to monitor, and datalog a
ProtEX-MAX using your PC. You can also generate
and save programming files for later use.
Advanced Display Features
Dual-Line Makes All the Difference
The main display can be programmed to indicate PV,
maximum (peak), minimum (valley), alternating
maximum/minimum, one of four alarm set points, or
Modbus®input. The second display can be configured
to display the input in a different scale, engineering
units, set points, user defined messages, or simply
turned off.
The ProtEX-MAX's dual-line display makes all the
difference both when programming the instrument
and when using it in the field. When programming the
instrument, the dual-line display prompts for the
needed information and also helps you keep track of
where you are in the setup process. When using the
instrument, the dual-line display provides more
information such as displaying the input in two
different scales like height and volume for a level
application. We call this the Dual-Scale feature.
Programming Assistance
The ProtEX-MAX's dual-line display makes
programming the instrument much easier because the
second display prompts for the needed information
and also helps you keep track of where you are in the
setup process.
The ProtEX-MAX is prompting for the value for Input 2
and displaying the default value of 20.00 mA. The “2”
in 20.00 is brighter than the rest of the digits indicating
that itis the number that will be changed by the Up arrow.
The ProtEX-MAX is now prompting for what the user
wants Display 2 to be; that is the value that
corresponds to 20 mA. In this case Display 2 is
currently set to 95.00.
Super-Bright Display
The ProtEX-MAX comes standard with a super-bright
display, with LEDs that are visible even in direct
sunlight. The display also has up to eight levels of
adjustable intensity for optimum visibility in any
lighting condition.

ProtEX-MAX PD8-6000 Explosion-Proof Process Meter
Instruction Manual
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Dual-Scale Display Feature
The ProtEX-MAX PD8-6000 has a rather unique, and very flexible dual-scale capability. This is of particular value in
level applications where a second scaled display can represent the measured input in a different form (i.e. gallons &
height). Both displays are independently scaled and are based on the 4-20 mA input signal. Beyond level, this
function has been used for pressure & force, current & power, feet & meters, GPM & CFM, and more.
Gallons & mA Gallons & Height Gallons & Percent Gallons & Head PSI
Rounding for Even Steadier Display
The rounding feature is used to give the user a
steadier display with fluctuating signals. It causes the
display to round to the nearest value according to the
rounding value selected (1, 2, 5, 10, 20, 50, or 100).
For example, with a rounding value of 10, and an
input of 12346, the display would indicate 12350.
Other Uses for Second Line
The second line can also be used indicate units, a
tag, or even a setpoint as the following pictures
illustrate:
Volume in Tank Gallons & Setpoint
Level in Feet Pressure Indication

ProtEX-MAX PD8-6000 Explosion-Proof Process Meter
Instruction Manual
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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 meter
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 PD8-6000 Explosion-Proof Process Meter
Instruction Manual
13
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 making them
removable also.
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

ProtEX-MAX PD8-6000 Explosion-Proof Process Meter
Instruction Manual
14
Transmitter Power Supplies
Meter Powers Transmitter
One of the most useful standard features of the
PD8-6000 is its built-in isolated, 24 V @ 25 mA power
supply to power the transmitter. This feature saves
money by eliminating an external power supply and
also simplifies wiring by reducing the number of
devices in the loop. It can be configured for 5, 10, or
24 V (default) by means of a simple internal jumper.
This power supply (24 V @ 25 mA) is even available
on meters that are powered from DC power. To use
an external power supply instead of the internal power
supply, simply make connections to different terminals
on the ProtEX-MAX.
The following diagram illustrates how to wire the
ProtEX-MAX so it will power the transmitter:
Meter Powers 4-20 mA Output
Not only can the ProtEX-MAX power the 4-20 mA
input signal, but an additional power supply of
24 V @ 25 mA is provided with the 4-20 mA output
option to power the 4-20 mA output.
Fuse Prevents Current Overload
Another very useful aspect of the ProtEX-MAX is that
the current input is protected against current overload
by a resettable fuse. 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.
Input Signal Conditioning
Non-linear input signals (i.e. weirs & flumes,
differential pressure, round horizontal tanks, etc.)
can be linearized with the ProtEX-MAX’s simple to
use built-in signal input conditioning functions.
These include square-root extractor, exponential
linearizer, round horizontal tank linearizer, and
user-customizable 32-point linearizer.
Round Horizontal Tank Linearization
This function automatically calculates the volume in a
round horizontal tank with flat ends.
Square Root Linearization
The square root function can be used to linearize the
signal from a differential pressure transmitter and
display flow rate in engineering units.
Programmable Exponent
Linearization
The programmable exponent can be used to linearize
the signal from level transmitters in open-channel flow
applications using weirs and flumes.

ProtEX-MAX PD8-6000 Explosion-Proof Process Meter
Instruction Manual
15
Exp-Proof Dual-Pump Alternation
The ProtEX-MAX can be used as an explosion-proof
pump controller when combined with a continuous
level transmitter. The most common pump control
application is shown below: controlling and alternating
two pumps and providing high and low-level alarms.
In addition, the ProtEX-MAX provides the 24 V to
power the transmitter.
Relay #4 turns the main pump on at 6000 gallons and
turns it off at 1000 gallons.
With the Pump Alternation feature activated, the next
time the level reaches 6000 gallons, relay #3 transfers
and starts the backup pump.
If the backup pump is not able to keep up, and the
level reaches 7000 gallons, relay #4 transfers and
starts the main pump as well.
Relay #2 trips the High Level Alarm at 7500 gallons
and resets at 6900 gallons.
Relay #1 trips the Low Level Alarm at 495 gallons and
resets at 750 gallons.
Learn how to use the ProVu (ProtEX-MAX)
meter as an explosion-proof pump
controller. See how the four relays can be
used to alternate two pumps and provide
high and low alarms.
predig.com/videos/PumpControl

ProtEX-MAX PD8-6000 Explosion-Proof Process Meter
Instruction Manual
16
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.

ProtEX-MAX PD8-6000 Explosion-Proof Process Meter
Instruction Manual
17
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 intensity is six.
Display
Update Rate
5/second (200 ms)
LED Status
Indicators
See LED Status Indicators on page 31
for details.
Overrange
Display flashes 999999
Underrange
Display flashes -99999
Display
Assignment
Display Line 1:
PV1, PV2, PCT, PV & units, gross weight,
net & gross weight, max/min, max & min,
set points, or Modbus®input
Display Line 2:
Same as Display Line 1; plus units, tag or
turned off
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 meter is turned off.
Rounding
Select 1, 2, 5, 10, 20, 50, or 100
(e.g. rounding = 10, value = 123.45,
display = 123.50)
Tare
Tare function zeros out the meter to
remove the weight of a container. Tare
function can be assigned to a function key,
F4 terminal, or a digital input.
Password
Three programmable passwords restrict
modification of programmed settings.
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
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
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:
Locallevel with smaller transientovervoltages
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 meter to wall. See Wall Mounting
Instructions on page 22 for additional
details.
Pipe Mounting:
Optional pipe mounting kit (PDA6848)
allows for pipe mounting. Sold separately.
See Pipe Mounting Instructions on page 23
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 PD8-6000 Explosion-Proof Process Meter
Instruction Manual
18
Process Inputs
Inputs
Field selectable: 0-20 mA, 4-20 mA
±10 V (0-5 V, 1-5 V, 0-10 V)
Modbus®PV (Slave)
Isolated
Transmitter
Power Supply
Terminals P+ & P-: 24 VDC ± 10%.
selectable for 24, 10, or 5 VDC supply
(internal jumper J4)
All models transmitter supply
rated @ 25mA max
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, programmable
exponent, or round horizontal tank volume
calculation
Multi-Point
Linearization
2 to 32 points for PV or PV1
2 to 8 points for PV2 (Dual-scale Level
feature)
Programmable
Exponent
User selectable from 1.0001 to 2.9999 for
open channel flow
Round
Horizontal
Tank
Diameter & Length:
999.999 inch or cm calculates volume
in gallons or liters respectively
Low-Flow
Cutoff
0.1 to 999,999 (0 disables cutoff function)
Point below at which 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
internal resettable fuse impedance)
Input
Overload
Current input protected by an internal
resettable fuse, 30 VDC max. Fuse resets
automatically after fault is removed.
HART
Transparency
The meter does not interfere with existing
HART communications; it displays the
4-20 mA primary variable and it allows the
HART communications to pass through
without interruption. The meter is not
affected if a HART communicator is
connected to the loop. The meter does
not display secondary HART variables.
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 28 for details.
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 onset point andtime)
•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
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 meter, relays
will reflect the state of the input to the meter
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 meter.
DO NOT apply AC or DC power to the
meter while the USB port is in use.

ProtEX-MAX PD8-6000 Explosion-Proof Process Meter
Instruction Manual
19
Isolated 4-20 mA Transmitter
Output Option
Output
Source
Process variable (PV), max, min, 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%.
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
Separate LEDs for Power (P), 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.
Digital Input (F4)
Function
Remote operation of front-panel buttons,
acknowledge/reset relays, reset max/min
values. See Function Keys & Digital I/O
Available Settings on page 54 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 54 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 meter or from
www.predig.com/download_software
System
Requirements
Microsoft®Windows®XP/Vista/7/8/10
Communications
USB 2.0 (for programming only)
(Standard USB A to USB Type B)
RS-485 to USB converter
(programming, monitoring,
and data logging)
Configuration
Configure meters one at a time
Power
USB port provides power to the meter.
DO NOT apply AC or DC power to the
meter while the USB port is in use.

ProtEX-MAX PD8-6000 Explosion-Proof Process Meter
Instruction Manual
20
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 & IP66
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.