Precision Digital PD8-7000 User guide

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

PRECISION DIGITAL CORPORATION

233 South Street • Hopkinton MA 01748 USA Tel (800) 343-1001 • Fax (508) 655-8990

www.predig.com

• Fully-Approved Explosion-Proof Temperature Meter

• J, K, T, E, R, S, B, N, C Thermocouples

• 100 or 1000 Ω Platinum, 10 Ω Copper, 120 Ω Nickel RTDs

• 1° or 0.1° Resolution

• User Programmable Display in Fahrenheit or Celsius

• Capture Maximum and Minimum Temperature Readings

• Optional Isolated 4-20 mA Output Turns the Meter into a Temperature Transmitter

• Averages up to 10 RTD Sensors

• Automatic Cold Junction Compensation

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

• SafeTouch Through-Glass Button Programming

• 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: -20 to 60°C (-4 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

• Password Protection

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

• Pipe Mounting Kits

• Stainless Steel Tag Available

• 3-Year Warranty

MeterView Pro

USB Install

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

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.

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.

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

Table of Contents

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

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

Key Features ....................................................................................................... 8

Specifications ................................................................................................... 14

General ................................................................................................ .......... 14

Temperature Input ........................................................................................ 15

Relays ............................................................................................................ 15

USB Connection ........................................................................................... 15

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

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

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

Digital Input (F4) ........................................................................................... 16

Digital Inputs & Outputs .............................................................................. 16

MeterView Pro Software .............................................................................. 16

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

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

Product Ratings and Approvals .................................................................. 17

EU Declaration of Conformity .......................................................................... 18

Safety Information ............................................................................................ 18

Installation .......................................................................................................... 18

Unpacking ..................................................................................................... 18

Mounting ........................................................................................................... 19

Installation Overview ................................................................................... 21

MeterView Pro Software .............................................................................. 21

Connections ................................................................................................. 22

Required & Factory Wired Connection ....................................................... 22

PROVU Electronics Module Layout ............................................................. 23

USB Connection ........................................................................................ 23

Power Connections .................................................................................... 24

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

Connections for Averaging RTD Sensors .................................................. 25

Relay Connections ..................................................................................... 26

Interlock Relay Feature .............................................................................. 26

Switching Inductive Loads.......................................................................... 26

RS-485 Connections .................................................................................. 27

RS-485 Multi-Drop Connection .................................................................. 27

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

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

4-20 mA Output Connections ..................................................................... 28

Analog Output Power Supply ..................................................................... 28

Remote Programming ................................................................................ 28

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

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

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

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

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

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

Main Menu ..................................................................................................... 32

Setting Numeric Values ............................................................................... 33

Setting Up the Meter (setup) ....................................................................... 33

Setting the Input Signal (Input) ................................................................. 33

Selecting the Temperature Scale (F or C)................................................ 33

Setting the Decimal Point (dEc pt) ........................................................... 33

Setting the Display Parameter & Intensity (dsplay) .................................. 34

Display Intensity (d-Inty).......................................................................... 34

Setting the Display Units or Custom Tags (units) .................................... 34

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Instruction Manual

Setting the Relay Operation (relay) ........................................................... 35

Setting the Relay Action ............................................................................. 35

Programming Set and Reset Points ........................................................... 36

Setting Fail-Safe Operation ........................................................................ 36

Programming Time Delay .......................................................................... 36

Relay Action for Loss of Input (Input Break) .............................................. 36

Relay and Alarm Operation Diagrams ........................................................ 36

High Alarm Operation (Set > Reset) ............................................................. 36

Low Alarm Operation (Set < Reset) ........................................................... 36

High Alarm with Fail-Safe Operation (Set > Reset) .................................... 37

Low Alarm with Fail-Safe Operation (Set < Reset)..................................... 37

Relay Sampling Operation ......................................................................... 37

Signal Loss or Input Break Relay Operation .............................................. 37

Time Delay Operation ................................................................................ 38

Relay Operation Details ............................................................................... 38

Overview .................................................................................................... 38

Relays Auto Initialization ............................................................................ 38

Fail-Safe Operation .................................................................................... 38

Front Panel LEDs ....................................................................................... 39

Latching and Non-Latching Relay Operation ............................................. 39

Non-Latching Relay (Auto) ........................................................................ 39

Non-Latching Relay with Manual Reset (A-nman) ...................................... 39

Latching Relay (LatcH) .............................................................................. 39

Latching Relay with Clear (Lt-Clr) ........................................................... 40

Acknowledging Relays ............................................................................... 40

Setting Up the Interlock Relay (Force On) Feature .................................... 41

Scaling the 4-20 mA Analog Output (Aout) ................................................ 42

Reset Menu (reset) ...................................................................................... 42

Manual Control Menu (Contrl) ................................................................... 42

Setting Up the Password (pass) .................................................................. 43

Protecting or Locking the Meter ................................................................. 43

Making Changes to a Password Protected Meter ...................................... 43

Disabling Password Protection .................................................................. 43

Advanced Features Menu ............................................................................ 44

Advanced Features Menu & Display Messages ......................................... 44

Offset Adjust (Adjust) ............................................................................... 45

Recalibration of the Meter (t CAL) ............................................................. 45

Noise Filter (filter) ................................................................................. 45

Noise Filter Bypass (bypass) ..................................................................... 46

Rounding Feature (round) ......................................................................... 46

Modbus RTU Serial Communications (serial) ......................................... 46

Select Menu (SElect) ................................................................................ 46

Analog Output Programming (AoutPr) ...................................................... 47

Programmable Function Keys User Menu (user) ...................................... 48

Internal Temperature Calibration (ICAL) .................................................... 49

Meter Operation ................................................................................................ 50

Button Operation .......................................................................................... 50

SafeTouch Buttons ...................................................................................... 50

Function Keys Operation ............................................................................. 51

Digital Inputs Operation ............................................................................... 51

Maximum/Minimum Readings ..................................................................... 51

Troubleshooting ............................................................................................... 52

Diagnostics Menu (diag) ............................................................................. 52

Testing the Display LEDs ........................................................................... 52

Determining Software Version ................................................................... 52

Reset Meter to Factory Defaults.................................................................. 52

Factory Defaults & User Settings ............................................................... 53

Troubleshooting Tips ................................................................................... 54

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

Table of Figures

Figure 1. Average Temperature RTD Input Connections .............................. 10

Figure 2. Enclosure Dimensions – Front View ............................................... 19

Figure 3. Enclosure Dimensions – Side Cross Section View ....................... 19

Figure 4. Integrated PROVU Required Connections ....................................... 22

Figure 5. PROVU Electronics Module Layout .................................................. 23

Figure 6. USB Connection ............................................................................... 23

Figure 7. Power Connections .......................................................................... 24

Figure 8. Thermocouple Input Connections ................................................... 25

Figure 9. Three-Wire RTD Input Connections ................................................ 25

Figure 10. Two-Wire RTD Input Connections ................................................. 25

Figure 11. Four-Wire RTD Input Connections ................................................ 25

Figure 12. Relay Connections ......................................................................... 26

Figure 13. Interlock Connections .................................................................... 26

Figure 14. AC and DC Loads Protection ......................................................... 26

Figure 15. Low Voltage DC Loads Protection ................................ ................ 26

Figure 16. RS-485 Diagnostic LEDs ................................................................ 27

Figure 17. Three-Wire RS-485 Connection ..................................................... 27

Figure 18. Digital Input and Output Connections .......................................... 27

Figure 19. F4 Digital Input Connections ......................................................... 27

Figure 20. 4-20 mA Output Connections ........................................................ 28

Figure 21. Analog Output Supply Powering Other Devices .......................... 28

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

Introduction

The ProtEX-MAX PD8-7000 is an explosion-proof digital temperature meter with a big, bright display that can be read in any lighting condition and is available with a variety of useful options. The meter is housed in a die-cast aluminum, field-mountable, NEMA 4X/IP68 rated enclosure for convenient indoor and outdoor installation.

The ProtEX MAX PD8-7000 can be programmed by the user to accept type J, K, T, E, R, S, B, N, and C

thermocouples as well as 100 or 1000 Ω platinum, 10 Ω copper, and 120 Ω nickel RTD inputs. The meter’s

six-digit display allows it to display the higher temperature thermocouples up to their standard Fahrenheit range, such as 2400 degrees for the Type K thermocouple.

One of the most useful applications for the PD8-6300 is to convert the pulse input from the flowmeter into an isolated 4-20 mA output all the while displaying flow rate and total on a big bright display as the following graphic illustrates:

A fully loaded PD8-7000 temperature meter comes with four SPDT relays, an isolated 4-20 mA output, five digital inputs and four digital outputs, and RS-485 serial communications. The four relays can be used to indicate high or low temperature alarms or for simple on / off temperature control.

Ordering Information

85-265 VAC Models

Model

Standard Features

Options Installed

PD8-7000-6H0

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

No options

PD8-7000-6H7

4 relays 4-20 mA output

12-24 VDC Models

Model

Standard Features

Options Installed

PD8-7000-7H0

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

No options

PD8-7000-7H7

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

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

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Key Features

Connections for PD8-7000-6H7 & PD8-7000-7H7

The Only Explosion-Proof Temperature Meter You Will Ever Need

Front, back and in between, the PD8-7000 ProtEX-MAX explosion-proof temperature meter boasts specifications, features and functionality that make it the only hazardous area temperature 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 first thing you notice about the PD8-7000 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 PD8-7000 has all the same features as our PD7000 1/8 DIN temperature meter, but it is not just a meter stuffed in an explosion-proof enclosure like many of our competitors offer. The PD8-7000 is approved as a complete product by FM and CSA and also carries ATEX and IECEx approvals.

The ProtEX MAX PD8-7000 can be programmed by the user to accept type J, K, T, E, R, S, B, N, and C

thermocouples as well as 100 or 1000 Ω platinum,

10 Ω copper, and 120 Ω nickel RTD inputs. The

meter’s six-digit display allows it to display the higher

temperature thermocouples up to their standard Fahrenheit range, such as 2400 degrees for the Type K thermocouple. The user can also set the meter to display in Fahrenheit or Celsius and set the resolution to 1 degree or 0.1 degree.

One of the most common applications for the PD8-7000 with the isolated 4-20 mA output is to act as an explosion-proof temperature transmitter with a big display. The meter will also capture the maximum and minimum readings.

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.

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

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 meter comes from the factory pre-calibrated for all thermocouple and RTD inputs so the user need only set the RTD / TC switch in the appropriate position and select the desired input. The user can also set the meter to display in Fahrenheit or Celsius and set the resolution to 1 degree or 0.1 degree. 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 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 temperature on the main display and a tag on the second display.

Programming Assistance

The ProtEX-MAX's dual-line display makes programming the instrument much easier because the second display helps you keep track of where you are in the setup process.

Input Setup

Display Setup

Informative Display

The most common setup for the dual-line display on the PD8-7000 is to show the temperature (in °F or °C with 1° or 0.1° resolution) on the main display and a tag on the second display.

In addition, the main display can be programmed to indicate the maximum (peak), minimum (valley), alternate between the maximum/minimum, or one of four alarm set points. The second display can also be configured to display set points, user defined messages, or simply turned off.

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.

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

Explosion-Proof Temperature Transmitter with Huge Display

If you want to be able to easily read the temperature of your process in a hazardous area as well as retransmit an isolated 4-20 mA signal, the PD8-7000 is the perfect choice. In the case of thermocouples, the PD8-7000 will linearize the signal, provide cold junction compensation, display the temperature on a big bright display that can be read in any lighting condition and output an isolated 4-20 mA signal. The PD8-7000 will provide the power drive this output and the output can be scaled for any range you want.

500 V of Isolation on the Output

The inputs and outputs of the ProtEX-MAX PD8-7000 are electrically isolated to prevent ground loops and make wiring easier. All inputs, outputs and power supplies are fully isolated from one another.

Display & Toggle Maximum / Minimum Reading

One of the most useful features of the PD8-7000 is its ability to capture and display maximum and minimum temperature readings either momentarily or continuously.

1. Display momentarily by assigning to the F1-F3 function keys or to the digital inputs in the User menu.

2. Display continuously by assigning either display to max/min through the Display menu.

Any of the F1-F3 function keys (buttons) and the digital inputs can be programmed to reset the max & min readings. The meters are set at the factory to display the max reading by pressing the Up arrow/F2 button and to use the Right arrow/F1 button to access the Reset menu.

See Factory Defaults & User Settings on page 53 for complete details.

Multiple RTD Sensor Averaging

Figure 1. Average Temperature RTD Input

Connections

The PD8-7000 can find the average temperature of up to 10 RTD probes connected in parallel. This new calculated value would then be treated as the PV (temperature) displayed on the meter. The average temperature is also available via Modbus communications and as the retransmitted value for the optional 4-20 mA output. The above example shows the PD8-7000 displaying the average temperature of three RTDs installed in air duct.

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

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.

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

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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 PD8-7000 in every regard except for the signal input connector. See Figure 5 on page 23 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 -20 to 65°C (-4 to 149°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 ±2°C max from 0 to 65°C ambient and ±4°C max from -20 to 0°C ambient.

USB cable conveniently

plugs into side of

ProtEX-MAX meter

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

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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.

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

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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

Temperature displayed on line 1 with four or five-digits and F/C indication, based on configuration.

Example 2347.2F with 0.1° resolution and 2347°F with 1° resolution.

Resolution

1 or 0.1 for all thermocouple and RTD inputs

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 29 for details

Overrange

Display flashes 99999

Underrange

Display flashes -9999

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 cycled.

Rounding

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

display = 123.50)

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

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

Fuse

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

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 meter to wall. See Wall Mounting Instructions on page 19 for additional details.

Pipe Mounting: Optional pipe mounting kit (PDA6848) allows for pipe mounting. Sold separately. See Pipe Mounting Instructions on page 20 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.

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

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Temperature Input

Inputs

Thermocouple: J, K, T, E, R, S, B, N, C RTD: 100 Ω platinum (0.00385 & 0.00392 coefficients), 10 Ω copper, 120 Ω nickel,

1000 Ω platinum (0.00385 & 0.00392

coefficients)

Cold Junction Reference

Automatic, fixed, no user calibration needed

Temperature Drift

2C maximum from 0 to 65C ambient temperature 4C maximum from -20 to 0C ambient temperature

Offset Adjustment

User programmable offset adjust ±50.0 degrees. This parameter allows the user to apply an offset value to the temperature being displayed.

Input Impedance

Greater than 100 k

Sensor Break Detection

Open TC or RTD sensor indicated by display flashing oPEn, relays can be

programmed to go “On”, “Off”, or to “Ignore”

(Note: Ignore is detected as an upscale condition). Analog output goes to the programmed sensor break value.

RTD Averaging

Up to 10 RTDs connected in parallel can be averaged.

Accuracy & Ranges

Type

Range (°F)

Accuracy

Range (°C)

Accuracy

-200 to 2000

±1.8°F

-129 to 1093

±1°C K -200 to 2400

±1.8°F

-129 to 1316

±1°C T -200 to 752

±1.8°F

-129 to 400

±1°C E -200 to 1800

±1.8°F

-129 to 982

±1°C R -50 to 3000

±3.6°F

-46 to 1649

±2°C S -50 to 3000

±3.6°F

-46 to 1649

±2°C B 752 to 3300

±3.6°F

400 to 1816

±2°C N -100 to 2300

±3.6°F

-73 to 1260

±2°C C 32 to 4100

±3.6°F

0 to 2260

±2°C

10

-328 to 500

±0.2°F

-200 to 260

±0.1°C

100

-328 to 1562

±0.7°F

-200 to 850

±0.4°C

120

-110 to 500

±0.2°F

-79 to 260

±0.1°C

1000

-328 to 900

±0.7°F

-200 to 482

±0.4°C

All ranges capable of 1° or 0.1° resolution.

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 26 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 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.

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.

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

Isolated 4-20 mA Output

Output Source

PV (temperature), max, min, set points 1-4, Modbus PV input, or manual control mode

Scaling Range

1.000 to 23.000 mA for any display range

Calibration

Factory calibrated:

0.0 to 2000.0 = 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 -20 to 0C ambient

Note: Analog output drift is separate from input drift.

Power Supply for Analog Output Loop

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

All models rated @ 25 mA max.

External Loop Power Supply

35 VDC maximum

Output Loop Resistance

Power supply

Minimum

Maximum

24 VDC

10 

700 

35 VDC (external)

100 

1200 

RS-485 Serial Communications

Compatibility

EIA-485

Connectors

Removable screw terminal connector

Max Distance

3,937' (1,200 m) max

Status Indication

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

Modbus RTU Serial Communications

Slave Id

1 – 247 (Meter address)

Baud Rate

300 – 19,200 bps

Transmit Time Delay

Programmable between 0 and 199 ms

Data

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

Parity

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

Byte-To-Byte Timeout

0.01 to 2.54 sec

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 48 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 48 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) (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 meter.

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

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

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Compliance Information

Electromagnetic Compatibility

Emissions

EN 55022 Class A ITE emissions requirements

Radiated Emissions

Class A

AC Mains Conducted Emissions

Class A

Immunity

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

RFI - Amplitude Modulated

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

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

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

Electrical Fast Transients

±2kV AC mains, ±1kV other

Electrostatic Discharge

±4kV contact, ±8kV air

RFI Conducted

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

AC Surge

±2kV Common, ±1kV Differential

Surge

1KV (CM)

PowerFrequency Magnetic Field

30 A/m 70%V for 0.5 period

Voltage Dips

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

Voltage Interruptions

<5%V for 250 periods

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

Product Ratings and Approvals

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.

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

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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 meter.

• Risk of electric shock or personal injury.

• Hazardous voltages exist within enclosure.

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

Installation

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

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

70.

For Installation in Canada

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

For European Community

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

• Disconnect from supply before opening enclosure.

• Keep cover tight while circuits are live.

• Conduit seals must be installed within 18"

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

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

Unpacking

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

If any part is missing or the meter 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 meter has been wired and tested in a safe environment. The cover jam screw is intended to prevent the removal of the meter cover in a hazardous environment without the use of tools. Using a M2 hex wrench, turn the screw clockwise until the screw contacts the meter. 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.

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

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Mounting

The ProtEX-MAX has four slotted mounting flanges that may be used for pipe mounting or wall mounting.

Refer to Figure 2 and Figure 3 below.

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

Mounting Dimensions

All units: inches (mm)

Figure 2. Enclosure Dimensions – Front View

Figure 3. Enclosure Dimensions –

Side Cross Section View

Wall Mounting Instructions

The meter 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 meter to a wall, follow these instructions:

• Prepare a section of wall approximately 7" x 8.5" (178 mm x 216 mm) for meter mounting by marking with a pencil the mounting holes (shown in Figure 2) on the wall.

• Select the appropriate mounting screws for the

mounting surface to be used. The mounting holes diameter is shown on Figure 2.

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.

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

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Pipe Mounting Instructions

The meter 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 meter 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

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

Installation Overview

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

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

2. Connect the meter 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 meter for your application.

6. Disconnect the USB cable from the meter.

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

8. Install the meter and put into service.

9. Make any programming adjustments using the programming buttons.

MeterView Pro Software

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 the USB cable provided. DO NOT use a different 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 apply AC or DC power to the meter while your PC is connected to the meter 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 meter 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 meter and the other end to the computer. The computer will automatically install the driver software it needs to talk to the meter. 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 meter may be connected at a time. Attaching multiple meters will cause a conflict with the meter software.

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

• The meter should only be connected to a computer while it is located in a safe 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 meter.

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 meter itself. This way, you will always have the most current version on the meter for future installs.

• DO NOT unplug the meter while the new

installation files are being written to it. The meter will display uwrite during the process and you will receive an on-screen notification once the process is complete.

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

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Connections

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

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

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

• Static electricity can damage sensitive components.

• Observe safe handling precautions for static-sensitive components.

• Use proper grounding procedures/codes.

• If the instrument is installed in a high voltage

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

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

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

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

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

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

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

Required & Factory Wired Connection

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

Figure 4. Integrated PROVU Required Connections

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

PROVU Electronics Module Layout for PD8-7000-6H7 and PD8-7000-7H7*

* For models PD8-7000-6H0 and PD8-7000-7H0 the upper set of connectors (RELAYs & MA OUT) are not present

Figure 5. PROVU Electronics Module Layout

USB Connection

Figure 6. USB Connection

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

• The meter should only be connected to a computer while it is located in a safe area.

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

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Power Connections

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

Figure 7. Power Connections

AC or DC

POWER

Required External Fuse:

5 A max, 250 V Slow Blow

POWER

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

Signal Connections

Signal connections are made to a three-terminal connector labeled SIGNAL.

Thermocouple and RTD Connections

The following figures show examples for thermocouple and RTD connections.

The TYPE selector switch must be set to the proper position for the meter to accept the selected RTD or TC input.

The RANGE selector switch is used to select 100-ohm platinum or 10-ohm copper RTD. The 1000-ohm platinum RTD input uses the same setting as the 100-ohm RTD.

The input type is selected using the Setup menu. The selected thermocouple input must correspond to

the thermocouple sensor and wire type used. The meter accepts two, three, or four-wire RTDs. The

three-wire RTD connection has built-in lead wire compensation.

Lead wire compensation for two-wire RTDs can be applied using the Adjust menu. See the Advanced Features Menu on page 44.

The four-wire RTD connection is similar to the three-wire. One of the leads of a four-wire RTD is not connected and may be clipped off.

The three-wire connection provides sufficient lead wire compensation to obtain accurate readings even with long leads.

Connections for Averaging RTD Sensors

To obtain the average temperature from 2 to 10 RTD sensors, connect all the sensors in parallel and select the number of sensors in the RTD Total (rtdtot) menu. See the Advanced Features Menu on page 44.

Figure 8. Thermocouple Input Connections

Figure 9. Three-Wire RTD Input Connections

Figure 10. Two-Wire RTD Input Connections

Figure 11. Four-Wire RTD Input Connections

SIGNAL

EXC T+ COM

1 2 3

RTD

TYPE

100

RANGE

M-LINK

1 2 3 4 5 6 7 8

RTD

Sensor

SIGNAL

EXC T+ COM

1 2 3

RTD

TYPE

100

RANGE

M-LINK

1 2 3 4 5 6 7 8

RTD

Sensor

SIGNAL

EXC T+ COM

1 2 3

RTD

TYPE

100

RANGE

M-LINK

1 2 3 4 5 6 7 8

RTD

Sensor

SIGNAL

EXC T+ COM

1 2 3

RTD

TYPE

100

RANGE

M-LINK

1 2 3 4 5 6 7 8

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

Relay Connections

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

corresponding relay. The relays’ C terminals should

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

Figure 12. Relay Connections

Interlock Relay Feature

As the name implies, the interlock relay feature reassigns one, or more, alarm/control relays for use as interlock relay(s). Interlock contact(s) are wired to digital input(s) and activate the interlock relay. This feature is enabled by configuring the relay, and the corresponding digital input(s), see Setting Up the Interlock Relay (Force On) Feature on page 40.

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

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

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

Figure 13. Interlock Connections

Switching Inductive Loads

The use of snubbers to suppress electrical noise is strongly recommended when switching inductive

loads to prevent disrupting the microprocessor’s

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

Figure 14. AC and DC Loads Protection

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

Notes:

1. Use capacitors rated for 250 VAC.

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

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

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

Figure 15. Low Voltage DC Loads Protection

RC Networks (Snubbers) Available from Precision Digital

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

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

C NONO NC NC C

RELAY4 RELAY3

4 36 5 2 1

C NONO NC NC C

RELAY2 RELAY1

4 36 5 2 1

C R

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

RS-485 Connections

The RS-485 connections are made to a five terminal connector used for Modbus RTU serial communications. The RS-485 terminals include Transmit Data (DO) and (/DO), Receive Data (DI) and (/DI), and Signal Ground. See Modbus RTU Serial Communications (serial) on page 46 for more information.

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

Figure 16. RS-485 Diagnostic LEDs

RS-485 Multi-Drop Connection

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

To change the meter address:

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

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

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

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

Three-Wire Connection

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

Figure 17. Three-Wire RS-485 Connection

Digital I/O Connections

The ProtEX-MAX has a 10-position terminal block for connecting digital inputs and outputs.

Figure 18. Digital Input and Output Connections

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

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

F4 Digital Input Connections

A digital input, F4, is standard on the meter. This digital input should be connected with a normally open closure across F4 and COM, or with an active low signal applied to F4. It can be used for remote operation of front-panel buttons, to acknowledge/reset relays, or to reset max/min values. See Function Keys & Digital I/O Available Settings on page 48 for a complete list of capabilities.

Figure 19. F4 Digital Input Connections

__ __

DI DI DO DO

1 2 3 4 5 6

+5 I1 I2 I3 I4 O1

7 8

O2 O3

9 10

O4 G

DI 1-4 DO 1-4

5 VDC GND

EXC T+ COM

123

COM

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

4-20 mA Output Connections

Connections for the 4-20 mA output are made to the connector terminals labeled mA OUT. The 4-20 mA output may be powered internally or from an external power supply.

Figure 20. 4-20 mA Output Connections

Analog Output Power Supply

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

Figure 21. Analog Output Supply Powering Other

Devices

Remote Programming

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

4-20 mA Input

Remote Display, PLC,

Chart Recorder, Etc.

RI- I+

132

RELAY1

mA OUT

24 V

12-35 VDC

Power

Supply

4-20 mA

Input Meter

RI- I+

132

RELAY1

321

24 V

mA OUT

Internal Power Supply

and Analog Output

321

Active Output Loop Passive Output Loop

RI- I+

132

24 VDC

Powered

Device

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Page 29

ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

Setup and Programming

There is no need to recalibrate the meter when first received from the factory. Simply select the input type, ºF or ºC, and decimal point.

The meter is factory calibrated prior to shipment to read temperature in degrees Fahrenheit with calibration equipment that is certified to NIST standards..

Overview

There are two switches, located at the back of the meter, to set the input selection for TC or RTD and for 100-ohm platinum or 10-ohm copper. The 1000-ohm RTD input uses the same setting as the 100-ohm.

Setup and programming is done using MeterView Pro or through the programming buttons. After power and input signal connections have been completed and verified, apply power to the meter.

LED Status Indicators

LED

State

Indication

1-4

Steady

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

1-4

Flashing

Relay interlock switch open

1-4 & M

Flashing

Relay in manual control mode

Flashing

Analog output in manual control mode

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

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Programming Buttons

Button Symbol

Description

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

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

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

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

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

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

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

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

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

SafeTouch Buttons

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

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

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

SafeTouch Button Tips:

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

• Keep the glass window clean.

• Tighten the cover securely.

• Use a password to prevent tampering.

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

Display Functions & Messages

The meter displays various functions and messages during setup, programming, and operation. The following table shows the main menu functions and messages in the order they appear in the menu.

Display Functions & Messages

Display

Parameter

Action/Setting Description

setup

Setup

Enter Setup menu

Input

Enter Input selection menu

Set meter for thermocouple input J, K, T, E, R, S, B, N, C

Rtd

RTD

Set meter for RTD input 100Pt, 1000Pt, 10Cu, 120Ni

A385

Set meter for 0.00385 curve

A392

Set meter for 0.00392 curve

F or C

Press Enter to select degrees F or C

unitS

Units

Select the display units/tags

Dec pt

Decimal point

Set decimal point

dddd, dddd.d, dddd°F, dddd.dF

dsplay

Display

Enter the Display menu

Line 1

Press Enter to assign the upper display parameter (default: PV - temperature)

Line 2

Press Enter to assign the lower display parameter (default: engineering units)

d-Inty

Display intensity

Set display intensity level from 1 to 8

RELaY

Relay

Enter the Relay menu

RLY 1

Relay 1

Relay 1 setup

Act 1

Action 1

Set relay 1 action

Auto

Automatic

Set relay for automatic reset

A-nman

Automanual

Set relay for automatic & manual reset any time

LatcH

Latching

Set relay for latching operation

Lt-CLr

Latchingcleared

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

Altern

Alternate

Set relay for alternation control

Sanmpl

Sampling

Set relay for sampling operation

Display Functions & Messages

Display

Parameter

Action/Setting Description

OFF

Off

Disable relay and front panel status LED (Select Off to enable Interlock feature)

Set 1

Program set point 1

RSt 1

Reset 1

Program reset point 1

RLY 2

Relay 2

Relays 2-4 setup

FaiLSF

Fail-safe

Enter Fail-safe menu

FLS 1

Fail-safe 1

Set relay 1 fail-safe operation

Enable fail-safe operation

off

Off

Disable fail-safe operation

FLS 2

Fail-safe 2

Set relays 2-4 fail-safe operation

DeLAY

Delay

Enter relay Time Delay menu

DLY 1

Delay 1

Enter relay 1 time delay setup

On 1

Set relay 1 On time delay

OFF 1

Off 1

Set relay 1 Off time delay

DLY 2

Delay 2

Enter relays 2-4 time delay setup

break

Break

Set relay condition if input break detected

ignore

Ignore

Ignore input break condition (Processed as an upscale condition)

Relay goes to alarm condition when input break is detected

Off

Relay goes to non-alarm condition when input break is detected

Aout

Analog output

Enter the Analog output scaling menu

Dis 1

Display 1

Program display 1 value

Out 1

Output 1

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

Dis 2

Display 2

Program display 2 value

Out 2

Output 2

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

reset

Reset

Press Enter to access the Reset menu

Rst Hi

Reset high

Press Enter to reset max display

Rst Lo

Reset low

Press Enter to reset min display

Rst HL

Reset hi/low

Press Enter to reset max & min displays

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

Display Functions & Messages

Display

Parameter

Action/Setting Description

Contrl

Control

Enter Control menu

Auto

Automatic

Press Enter to set meter for auto operation

nmAn

Manual

Press Enter to manually control relays or analog output operation

pass

Password

Enter the Password menu

Pass 1

Password 1

Set or enter Password 1

Pass 2

Password 2

Set or enter Password 2

Pass 3

Password 3

Set or enter Password 3

unloc

Unlocked

Program password to lock meter

locd

Locked

Enter password to unlock meter

99999

-9999

Flashing display

Overrange condition Underrange condition

Open

Open sensor indication

Main Menu

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

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

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

• Changes to the settings are saved to memory only after pressing Enter/F3.

• The display moves to the next menu every time a setting is accepted by pressing Enter/F3.

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

Setting Numeric Values

The numeric values are set using the Right and Up arrow buttons. Press Right arrow to select next digit and Up arrow to increment digit value.

The digit being changed is displayed brighter than the rest.

Press and hold up arrow to auto-increment the display value.

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

Setting Up the Meter (setup)

The Setup menu is used to select:

1. Input type the meter will accept

2. Degrees F or C

3. Select the display units/tags

4. Decimal point position and F or C indication

5. Display parameter and intensity

6. Relay operation

7. 4-20 mA analog output scaling Press the Enter button to access any menu or press

Up arrow button to scroll through choices. Press the Menu button to exit at any time.

Setting the Input Signal (Input)

Enter the Input menu to set up the meter to accept thermocouple (tc) or RTD (rtd) inputs. The Type selector switch, located at the rear of the meter, must be set accordingly.

The thermocouple input is capable of accepting various types of thermocouples.

The RTD input is capable of accepting various types of RTD sensors. After selecting 100 Pt or 1000Pt, it is necessary to select either A385 (0.00385) or A392 (0.00392) coefficient.

Selecting the Temperature Scale (F or C)

The meter can display the temperature in degrees Fahrenheit or Celsius.

Setting the Decimal Point (dEc pt)

The temperature may be displayed with one decimal or with no decimal point. The temperature scale can also be displayed with the reading. The degree symbol is available only with no decimal point selected.

Pressing the Up arrow scrolls the decimal point and temperature format selections.

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

Setting the Display Parameter & Intensity (dsplay)

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

1. Process value

2. Relay set points

3. Max & min values

4. Modbus input

5. Display reading and units

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

1. Process value

2. Relay set points

3. Max & min values

4. Engineering units or custom legends

5. Modbus input

6. Off (no display)

7. Display reading and units

Press the Up arrow to change selection, press Enter to accept setting, and press Menu to exit programming

After setting up the input and display, press the Menu button to exit programming and skip the rest of the setup menu. Press the Menu button again and the Up arrow to reach the Setup menu again and complete the setup of the meter.

Display Intensity (d-Inty)

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

Setting the Display Units or Custom Tags (units)

Enter the display unit or custom tag that will be displayed if units is selected in the units menu, or d unit is selected as the Lower display parameter. See the Setting the Display Parameter & Intensity (dsplay) flow chart on page 34 to access the display menu to show the unit or tag on the Lower display. The engineering units or custom legends can be set using the following 7-segment character set:

Display

Character

Display

Character

k K 1

l L 2

nm m 3

n n 4

O O 5

o o 6

p P 7

q q 8

t t b

uw w d

x X e

y Y f

z Z g

- - 9

/ / H

[ ] h

] [ I

= = I

Degree(<)

Space

Notes:

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

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

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

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

Setting the Relay Operation (relay)

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

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

1. Relay action

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

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

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

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

user-specified time) g. Off (relay disabled and Interlock feature

enabled)

2. Set point

3. Reset point

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

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

6. Relay action for loss (break) of input (ignore, on, off)

Setting the Relay Action

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

1. Automatic reset (non-latching)

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

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

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

5. Relay alternation control (automatic reset only)

6. Sampling (the relay is activated for a user-specified time)

7. Off (relay disabled and Interlock feature enabled)

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

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

Programming Set and Reset Points

High alarm indication: program set point above reset point.

Low alarm indication: program set point below reset point.

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

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

Setting Fail-Safe Operation

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

Programming Time Delay

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

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

Relay Action for Loss of Input (Input Break)

Each relay may be programmed to go to one of the following conditions when the meter detects the loss of the input signal:

1. Turn On (Go to alarm condition)

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

3. Ignore (Processed as an upscale condition)

Relay and Alarm Operation Diagrams

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

High Alarm Operation (Set > Reset)

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

Low Alarm Operation (Set < Reset)

For Manual reset mode, ACK can be pressed anytime to turn

"off" relay. For relay to turn back “on”, signal must go above

set point and then go below it.

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

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

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

of power failure, relay will go to alarm state.

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

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

of power failure, relay will go to alarm state.

Relay Sampling Operation

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

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

Signal Loss or Input Break Relay Operation

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

When the meter detects a break in the input, the relay will go to one of the following selected actions:

1. Turn On (Go to alarm condition)

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

3. Ignore (Processed as an upscale condition)

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

Time Delay Operation

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

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

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

Relay Operation Details

Overview

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

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

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

3. Sampling (Based on Time)

4. Relay Alternation Control

Relays Auto Initialization

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

Alarm #

HI or LO

Alarm

Set

Point

Reset

Point

Power-

Reading

Relay &

LED

1000

500

499

Off

700

900

499

On 3 LO

250

400

499

Off

450

200

499

Fail-Safe Operation

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

Fail-Safe Selection

Non-Alarm State

Alarm State

Power Failure

Off

Open

Closed

Open

Relays go to nonalarm state

Closed

Open

Closed

Relays go to alarm state

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

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

Front Panel LEDs

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

LED

Status

Alarm 1

Alarm 2

Alarm 3

Alarm 4

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

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

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

Latching and Non-Latching Relay Operation

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

Relay terminology for following tables

Terminology

Relay Condition

Alarm (Tripped)

Off

Normal (Reset)

Ack

Acknowledged

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

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

Non-Latching Relay (Auto)

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

Automatic reset only

Condition

LED

Relay

Normal

Off

Alarm

Ack (No effect)

Normal

Off

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

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

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

Automatic + manual reset at any time

Condition

LED

Relay

Normal

Off

Alarm

Normal

Off

Next Alarm

Ack

Off

Normal

Off

Latching Relay (LatcH)

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

Manual reset any time

Condition

LED

Relay

Normal

Off

Alarm

Ack

Off

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

Latching Relay with Clear (Lt-Clr)

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

Manual reset only after

alarm condition has cleared

Condition

LED

Relay

Normal

Off

Alarm

Ack (No effect)

Normal

Ack

Off

Acknowledging Relays

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

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

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

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

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

EXC T+ COM

123

COM

+5 I1 I2 I3 I4 O1 O2 O3 O4 G

DO 1-4

GND

ACK

PDA1044 Digital I/O Module

1 2 3 4 5 6 7 8 9 10

DI 1-4

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

Setting Up the Interlock Relay (Force On) Feature

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

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

2. In the Advanced features – User menu program

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

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

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

Interlock Relay Operation Example

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

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

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

the meter remotely.

1 2 3 4 5

DI 1-4

DO 1-4

5 VDC

GND

SW2

SW1

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

Scaling the 4-20 mA Analog Output (Aout)

The 4-20 mA analog output can be scaled to provide a 4-20 mA signal for any display range selected.

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

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

Note: During the analog output scaling, the display value is always indicated with a decimal point regardless of the decimal point selection for the temperature display.

For instructions on how to program numeric values

see Setting Numeric Values, page 32.

Reset Menu (reset)

The Reset menu is used to reset the maximum or minimum reading (peak or valley) reached by the process; both may be reset at the same time by selecting “reset high & low” (rst HL).

Manual Control Menu (Contrl)

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

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

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Setting Up the Password (pass)

The Password menu is used for programming three levels of security to prevent unauthorized changes to the programmed parameter settings.

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.

Protecting or Locking the Meter

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

For instructions on how to program numeric values see Setting Numeric Values, page 32.

Making Changes to a Password Protected Meter

If the meter is password protected, the meter will display the message Locd (Locked) when the Menu button is pressed. Press the Enter button while the message is being displayed and enter the correct password to gain access to the menu.

Note: After exiting the programming mode, the meter returns to its password protected condition

Disabling Password Protection

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

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

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

Did you forget the password?

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

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

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Advanced Features Menu

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

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

Advanced Features Menu & Display Messages

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

Display

Parameter

Action/Setting

Adjust

Set adjust value to offset temperature reading

T cal

T Cal

Enter temperature calibration menu

T lo

T Low

Apply the low temperature input (e.g. 32°F)

T Hi

T High

Apply the high temperature input (e.g. 1000°F)

rtdtot

RTD Total

Set the number of RTDs connected in parallel to obtain average temperature

filtEr

Filter

Set noise filter value

bypASs

Bypass

Set filter bypass value

Round

Set the rounding value for display variables

seriAl

Serial

Set serial communication parameters

SlaV Id

Slave ID

Set slave ID or meter address

baud

Baud rate

Select baud rate

Tr dLY

Transmit delay

Set transmit delay for serial communication

Parity

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

t-byt

Time byte

Set byte-to-byte timeout

Display

Parameter

Action/Setting

SelEct

Select

Enter the Select menu

AoutPr

Analog output programming

Program analog output parameters

Source

Select source for the 4-20 mA output

O-rang

Overrange

Program mA output for display overrange

u-rang

Underrange

Program mA output for display underrange

Break

Input break

Set analog output value if input break is detected

nmAx

Maximum

Program maximum mA output allowed

nmin

Minimum

Program minimum mA output allowed

Calib

Calibrate

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

4 nmA

4 mA output

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

20 nmA

20 mA output

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

user

User I/O

Assign function keys and digital I/O

F1 function key

Assign F1 function key

F2 function key

Assign F2 function key

F3 function key

Assign F3 function key

F4 function

Assign F4 function (digital input)

dI I

Digital input 1

Assign digital input 1 – 4

dO 1

Digital output 1

Assign digital output 1 – 4

ICal

Internal temp calibration

Enter internal temperature calibration (used for factory calibration only)

nmref

Measured temp reference

Enter the measured reference temperature in degrees Celsius (e.g. 25.0)

0nmV

0 mV

Apply 0.000 mV input Internal Calibration

100nmV

100 mV

Apply 100.000 mV input

Diag

Diagnostics

Display parameter settings

LED t

LED test

Test all LEDs (press menu to exit test)

Info

Information

Display software number and version

Erase

Erase MeterView Pro

software stored in meter’s

memory

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

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Offset Adjust (Adjust)

This parameter allows the user to select an offset adjustment to the temperature being displayed. Offset adjustment values can be either positive or negative and can be any number within 50.0F (+27.8C). The offset adjustment value is programmed through the Adjust menu.

The offset adjustment feature can be useful to compensate for errors due to thermocouple junctions or excessive lead wire resistance in RTDs.

Note: The offset adjustment value is reset to zero when the type of temperature sensor is changed (i.e. TC type or RTD curve). Celsius/Fahrenheit conversion is automatic.

Recalibration of the Meter (t CAL)

The Calibration (t CAL) menu is used to recalibrate the thermocouple and RTD inputs.

• There is no need to recalibrate the meter when first received from the factory. Simply select the input type, ºF or ºC, and decimal point.

• The meter is factory calibrated prior to shipment to read temperature in degrees Fahrenheit with calibration equipment that is certified to NIST standards.

• Check calibration of the meter at least every 12 months.

Allow at least 30 minutes warm-up time before performing recalibration procedure to ensure specified accuracy.

Recommended Calibration Points

To recalibrate the meter, it is recommended to use the Fahrenheit scale; this will give a greater degree of accuracy to the calibration. The scale can be changed to the Celsius scale after calibration is completed. The meter will display temperature accurately in any scale. The following table shows the recommended low and high calibration points for all types.

Type of input

Input 1 (Low)

Input 2 (High)

Check (Middle)

Type J

32F

1184F

600F

Type K

32F

1895F

960F

Type T

32F

698F

360F

Type E

32F

1652F

800F

Type R

32F

3110F

1500F

Type S

32F

3110F

1500F

Type B

32F

3110F

1500F

Type N

32F

1472F

700F

Type C

500F

3650F

1800F

10  Cu RTD

32F

9.035

450F

18.032

200F

12.639

100  Pt RTD (0.00385)

32F

100

1148F

320.12

590F

215.61

100  Pt RTD (0.00392)

32F

100

1148F

324.49

590F

217.89

120  Ni RTD

32F

120

410F

315.31

221F

205.22

1000  Pt RTD (0.00385)

32F

1000

900F

2750.4

450F

1876.5

1000  Pt RTD (0.00392)

32F

1000

900F

2785.1

450F

1893.7

Recalibration Procedure

1. Connect signal to the meter using the appropriate wire (e.g. type J thermocouple wire to recalibrate type J input). See Signal Connections on page 25.

2. Set up the meter to accept the selected input (e.g. type J T/C). See Setting Up the Meter (setup) on page 33.

3. Set up the meter to display temperature in degrees Fahrenheit.

4. Apply signal corresponding to input 1 (32°F) and program the display to read 32.0.

5. Apply signal corresponding to input 2 (1184°F for type J) and program the display accordingly.

6. After the meter accepts input 2, the display returns to reading mode. This completes the recalibration procedure for the selected input.

Noise Filter (filter)

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

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Noise Filter Bypass (bypass)

The noise filter bypass changes the behavior of the meter so that small variations in the signal are filtered out but large abrupt changes in the input signal are displayed immediately. The bypass value determines the minimum amount of signal change to be displayed immediately. All signal changes smaller than the bypass value are filtered or averaged by the meter. The noise filter bypass may be set between 0.1 and

99.9% of full scale.

Rounding Feature (round)

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

Rounding causes the display to round to the nearest value according to the rounding selected. Valid settings for this meter are 1, 2, 5, and 10 (only).

Modbus RTU Serial Communications (serial)

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

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

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

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

Notes:

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

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

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

Select Menu (SElect)

The Select menu is used to program the analog output parameters. There are no other selections for this model.

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Analog Output Programming (AoutPr)

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

1. Source: Source for generating the 4-20 mA output (e.g. PV - temperature)

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

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

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

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

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

7. Calibrate: Calibrate the internal 4-20 mA source reference used to scale the 4-20 mA output

Analog Output Source

The source for generating the 4-20 mA output may be assigned to the process variable, maximum or minimum value reached by the process, one of the set points, or the Modbus PV input.

Analog Output Calibration

To perform the analog output calibration, it is recommended to use a milliamp meter with a resolution of at least 0.1 µA to measure the output current. The values saved internally during this procedure are used for scaling the 4-20 mA output in the Setup menu.

Analog Output Calibration Procedure

1. Wire the PD8-7000 4-20 mA output to a current loop that includes a power supply (internal or external 12 to 24 VDC), and the mA input on the digital meter. See Figure 20. 4-20 mA Output Connections on page 28 for details.

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

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

4. The display will show 4 nmA. The PD8-7000 mA output should now be close to 4 mA. Press Enter and the display will show 04.000. Enter the actual value read by the digital mA meter and press Enter.

5. The display will show 20 nmA. The PD8-7000 mA output should now be close to 20 mA. Press Enter and the display will show 20.000. Enter the actual value read by the digital mA meter and press Enter.

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

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

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Programmable Function Keys User Menu (user)

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

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

Function Keys & Digital I/O Available Settings

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

Display

Description

Rst Hi

Reset the stored maximum display value

Rst Lo

Reset the stored minimum display value

Rst HL

Reset the stored maximum & minimum display values

relay

Directly access the relay menu

Set 1**

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

Rly d

Disable all relays until a button assigned to

enable relays (Rly E) is pressed

Rly E

Enable all relays to function as they have been programmed

O Hold

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

d Hold

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

Ln1 Hi

Display maximum display value on line 1

Ln1 Lo

Display minimum display value on line 1

Ln1 HL

Display maximum & minimum display values on line 1

Ln2 Hi

Display maximum display value on line 2

Ln2 Lo

Display minimum display value on line 2

Ln2 HL

Display maximum & minimum display values on line 2

F On 1**

Force relay 1 (*through 4) into the on state. This function is used in conjunction with a digital input to achieve interlock functionality. See page 40 for details about interlock relays.

Contrl

Directly access the control menu

disabl

Disable the selected function key or digital I/O

AcH

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

Reset

Directly access the reset menu

nmenu

Mimic the menu button functionality (digital inputs only)

rigHt

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

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

Enter

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

Alnm 1**

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

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Internal Temperature Calibration (ICAL)

The meter is factory calibrated prior to shipment to read temperature in degrees Fahrenheit with calibration equipment that is certified to NIST standards.

The Internal Calibration (ICAL) is a function used at the factory to calibrate all the thermocouple and RTD ranges. This procedure should only be used by qualified personnel.

To recalibrate the meter for a specific input and range, refer to Recalibration of the Meter (t CAL) on page 45.

Notes:

1. If meter is in operation and it is intended to accept only one input type (e.g. 100 Pt), recalibration of other inputs is not necessary.

2. Allow the meter to warm up for at least 30 minutes before performing the calibration procedure.

3. Use the Recalibration of the Meter (

t CAL

)

procedure on page 45.

The Internal calibration menu is part of the Advanced Features menu and is described in the following pages. This procedure should only be used by qualified personnel.

Note: Most users should not require the use of the Internal

Calibration procedure. The T CAL procedure should be used instead of the ICAL procedure.

Thermocouple Input Internal Calibration (ICAL)

1. Set the Type selector switch in the TC position and using copper wire connect a precision mV calibrator to the input.

2. In the Setup menu select the input: TC – Type J.

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

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

5. The meter displays either current calibration (nmref). Press Enter to start the calibration process.

6. Measure the room temperature in degrees Celsius using a reliable reference, enter the room temperature (e.g. 25.0), and press Enter.

7. The meter displays 0nmV, apply an input equal to

0.000 mV and press Enter. The display flashes while accepting the 0 mV input; press Enter again when the display stops flashing.

8. The meter displays 100nmV, apply an input equal to 100.000 mV and press Enter. The display flashes while accepting the 100 mV input; press Enter again when the display stops flashing.

9. Apply 0 mV, the meter should read room temperature.

10. This completes the calibration of all the thermocouple ranges.

RTD Input Internal Calibration (ICAL)

1. Set the Type selector switch in the RTD position and the Range switch in the 10 position. Using 3 wires connect a precision calibrator resistance output to the meter.

2. In the Setup menu select the input: RTD – 100 Pt – A385.

3. Access the Advanced Features menu and scroll to the ICAL menu and press Enter.

4. The meter displays the message (10 lo). Apply

9.035 ohm and press Enter. The display flashes for a moment while the meter is accepting the low input signal for the 10-ohm RTD. After the display stops flashing, press Enter again.

5. The meter displays the message (10 Hi). Apply

18.032 ohm and press Enter. The display flashes for a moment while the meter is accepting the high input signal for the 10-ohm RTD. After the display stops flashing, press Enter again.

6. The meter displays the message (100 lo). Do NOT press Enter.

7. Move the Range selector switch to the 100 position. Apply 100 ohm and press Enter. The display flashes for a moment while the meter is accepting the low input signal for the 100-ohm RTD.

8. The meter displays the message (100 Hi). Apply

320.12 ohm and press Enter. The display flashes for a moment while the meter is accepting the high input signal for the 100-ohm RTD.

9. At the end of the calibration process the meter should read 1148.0F with the 320.12-ohm input applied.

10. This completes the calibration of all the RTD ranges.

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Meter Operation

When installed, the primary way to operate the meter is with the SafeTouch through-glass buttons that allow the user to perform various operations without removing the cover and exposing the electronics to the hazardous environment. The user can also operate the meter by connecting a suitable control station or switch to one of the digital inputs that can be used to perform various operations on the meter based on the Programmable Function Keys. Finally, certain operations can be performed on the meter with MeterView Pro software or through Modbus commands.

The two default operations that can be performed with the meter’s SafeTouch buttons are:

1. Display the maximum and minimum readings

2. Acknowledge the relays

In addition, the user can program the SafeTouch Buttons to perform a variety of useful operations by reassigning them to other functions per Function Keys & Digital I/O Available Settings on page 48.

Button Operation

The following table shows the default operations for the F1, F2, and F3 SafeTouch Buttons, Displaying and resetting the maximum and minimum values and resetting the relays:

Button Symbol

Description

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

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

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

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

To learn more about SafeTouch buttons, see this video:

predig.com/videos/Safetouch_Buttons

SafeTouch Buttons

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

To actuate a button, press one finger to the glass directly over the marked button area. Then retract finger more than three inches from the glass before pressing the next button. When the cover is removed, the four mechanical buttons located next to the sensors are used. The sensors are disabled when a mechanical button is pressed and will automatically be re-enabled after 60 seconds of inactivity. The SafeTouch Buttons are designed to filter normal levels of ambient interference and to protect against false triggering, however, it is recommended that the SafeTouch Buttons be disabled (slide switch to DISABLE) if there is an infrared interference source in line-of-sight to the display.

SafeTouch Button Tips:

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

• Keep the glass window clean.

• Tighten the cover securely.

• Use a password to prevent tampering.

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Function Keys Operation

During operation, the programmable function keys operate according to the way they have been programmed in the Advanced Features – User menu. See See Programmable Function Keys User Menu (user) on page 48 for details.

See the table under Button Operation on page 50, which shows the factory default settings for F1, F2, and F3.

Digital Inputs Operation

Five (5) digital inputs, F4, DI-1 to DI-4, come standard on the meter. These digital inputs are programmed identically to function keys F1, F2, and F3. The inputs are triggered with a contact closure to +5 V in the case of digital inputs 1-4 or with an active high signal, see Digital I/O Connections on page 27 for details. The F4 is triggered with a contact closure to COM or with an active low signal. During operation, digital inputs operate according to the way they are programmed in the Advanced Features – User menu. See Programmable Function Keys User Menu (user) on page 48 for details.

Maximum/Minimum Readings

The max & min readings (peak & valley) reached by the process can be displayed either continuously or momentarily:

1. Display momentarily by assigning to the F1-

F3 function keys or to the digital inputs in the User menu.

2. Display continuously by assigning either

display to max/min through the Display menu.

To display max reading using function key with factory defaults:

1. Press Up arrow/F2 button to display maximum reading since the last reset/power-up.

2. To reset max/min press Right arrow/F1 button to access the Reset menu. The max & min displays are reset to actual values.

3. Press Menu to exit max/min display reading.

To display max/min readings continuously:

Assign either display to Max (d Hi), Min (d Lo), or toggle between Max and Min (d HL) every 10 seconds.

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Troubleshooting

The rugged design and the user-friendly interface of the meter should make it unusual for the installer or operator to refer to this section of the manual. However, due to the many features and functions of

the meter, it’s possible that the setup of the meter

does not agree with what an operator expects to see. If the meter is not working as expected, refer to the

Diagnostics menu and recommendations below.

Diagnostics Menu (diag)

The Diagnostics menu is located in the Advanced Features menu, to access Diagnostics menu see Advanced Features Menu on page 44.

This menu allows the user to test the functionality of

all the meter LEDs, check the meter’s software and

version information, and erase the MeterView Pro software installation files from the meter. Press the Enter button to view the settings and the Menu button to exit at any time.

For a description of the diagnostic messages, see Advanced Features Menu & Display Messages on page 44.

Testing the Display LEDs

To test all LEDs on the display:

1. Go to the Diagnostics menu (diAG) and press Enter button.

2. Press Up arrow button and scroll to LED Test menu (led t)

3. Press the Enter button to activate the LED Test. The meter will cycle through all digits, decimal points, and relay indicators to enable the operator to check that all LEDs are functioning properly.

4. Press the Enter button again to access the Information menu (info) or press the Menu button to return to Run Mode.

Determining Software Version

To determine the software version of a meter:

1. Go to the Diagnostics menu (diAG) and press Enter button.

2. Press Up arrow button and scroll to Information menu (Info).

3. Press Enter to access the software number (SFT) and version (UER) information. Write down the information as it is displayed. Continue pressing Enter until all the information is displayed.

4. The meter returns to Run Mode after displaying all the settings.

Reset Meter to Factory Defaults

When the parameters have been changed in a way

that is difficult to determine what’s happening, it might

be better to start the setup process from the factory defaults.

Instructions to load factory defaults:

1. Enter the Advanced Features menu. See Advanced Features Menu, page 44.

2. Press Up arrow to go to Diagnostics (diAG) menu.

3. Press and hold Right arrow for three seconds, press Enter when display flashes reset.

Note: If Enter is not pressed within three seconds, the display returns to the Diagnostics menu.

4. The meter goes through an initialization sequence (similar as on power-up) and loads the factory default settings.

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Factory Defaults & User Settings

The following table shows the factory setting for most of the programmable parameters on the meter.

Parameter

Display

Default Setting

Input type

Input

Type J TC

Temp scale

F or C

°F

Adjust

0.0

RTD total

rtdtot

Filter

filter

Bypass

bypass

0.2

Round

Decimal point

ddddoF

No decimal

Display line 1

Line 1

PV: Temperature

Display line 2

Line 2

Eng units: Temp

Display intensity

d-Inty

Relay 1 action

Act 1

Automatic

Relay 1 set point

Set 1

100

Relay 1 reset point

RSt 1

Relay 2 action

Act 2

Automatic

Relay 2 set point

Set 2

200

Relay 2 reset point

RSt 2

150

Relay 3 action

Act 3

Automatic

Relay 3 set point

Set 3

300

Relay 3 reset point

RSt 3

250

Relay 4 action

Act 4

Automatic

Relay 4 set point

Set 4

400

Relay 4 reset point

RSt 4

350

Fail-safe relay 1

Fls 1

Off

Fail-safe relay 2

Fls 2

Off

Fail-safe relay 3

Fls 3

Off

Fail-safe relay 4

Fls 4

Off

On delay relay 1

On 1

0.0 sec

Off delay relay 1

Off 1

0.0 sec

On delay relay 2

On 2

0.0 sec

Off delay relay 2

Off 2

0.0 sec

On delay relay 3

On 3

0.0 sec

Off delay relay 3

Off 3

0.0 sec

On delay relay 4

On 4

0.0 sec

Parameter

Display

Default Setting

Off delay relay 4

Off 4

0.0 sec

Input break relay 1

ignore

Ignore

Input break relay 2

ignore

Ignore

Input break relay 3

ignore

Ignore

Input break relay 4

ignore

Ignore

Display 1 analog out

Dis 1

0.0 Output 1 value

Out 1

4.000 mA

Display 2 analog out

Dis 2

2000.0 Output 2 value

Out 2

20.000 mA

Source analog output

Source

Process Variable Overrange output

O-rang

21.000 mA

Underrange output

u-rang

3.000 mA

Input break output

break

1.000 mA

Maximum output

nmAx

23.000 mA

Minimum output

nmin

1.000 mA

Slave ID

SlavId

247

Baud rate

baud

9600

Transmit delay

Tr dly

10 ms

Parity

Even

Byte-to-byte timeout

t-byt

010 (0.1 sec) F1 function key

Reset max & min

F2 function key

Line 1: Max (Hi)

F3 function key

Acknowledge relays

F4 function

Acknowledge relays

Digital input 1

dI 1

Digital input 2

dI 2

Right arrow

Digital input 3

dI 3

Up arrow

Digital input 4

dI 4

Enter

Digital output 1

dO 1

Alarm 1

Digital output 2

dO 2

Alarm 2

Digital output 3

dO 3

Alarm 3

Digital output 4

dO 4

Alarm 4

Password 1

Pass 1

000000 (unlocked)

Password 2

Pass 2

000000 (unlocked)

Password 3

Pass 3

000000 (unlocked)

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

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Troubleshooting Tips

This meter is a highly sophisticated instrument with an extensive list of features and capabilities. If the programming buttons are used to program the meter, it may be a difficult task to keep everything straight. That is why we strongly recommend the use of the free MeterView Pro software for all programming activities. A USB cable is provided with the meter for programming with MeterView Pro software.

If you have programmed the meter with the programming buttons and it is not working as intended, try re-programming the meter using MeterView Pro software.

Symptom

Check/Action

No display at all

Check power at power connector

Not able to change setup or programming, Locd is displayed

Meter is password-protected, enter correct six-digit password to unlock or Master Password of 508655.

Meter displays error message during calibration (Error)

Check:

1. Signal connections

2. Type and range selector switches

3. Input selected in Setup menu

Meter displays

1. 99999

2. -9999

Check:

1. Input selected in Setup menu

2. Corresponding signal at Signal connector

Display is unstable

Check:

1. Input signal stability and value

2. Filter and bypass values (increase)

Display response is too slow

Check filter and bypass values

Display reading is not accurate

Check:

1. TC wire type

2. Input selection in Setup menu

Display does not respond to input changes, reading a fixed number

Check the display assignment, it might be displaying max, min, or set point.

Display alternates between

1. Hi and a number

2. Lo and a number

Press Menu to exit max/min display readings.

Relay operation is reversed

Check:

1. Fail-safe in Setup menu

2. Wiring of relay contacts

Relay and status LED do not respond to signal

Check:

1. Relay action in Setup menu

2. Set and reset points

Flashing relay status LEDs

Relays in manual control mode or relay interlock switches opened.

Meter not communicating with application programs

Check:

1. M-Link Connector installed between PROVU electronics and ProtEX-MAX connector board. See Figure 4: Integrated PROVU Required Connections on page 22

2. Serial settings

3. Meter address and baud rate

If the display locks up or the meter does not respond at all

Cycle the power to reboot the microprocessor.

SafeTouch buttons do not respond

1. If mechanical button was pushed, the SafeTouch buttons will be re-enabled automatically 60 seconds after the last button push.

2. If slide switch on connector board is in DISABLE position, switch to ENABLE.

3. Strong direct sunlight may interfere with SafeTouch button operation. It is recommended to operate the buttons by standing so as to block direct sunlight.

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Troubleshooting Tips

Symptom

Check/Action

Serial Communications METER LINK LED Indicator is off

Check:

1. Modular cable connection

2. Power to the device

If only the TX (or DATA IN) data status LED is flashing when serial communications attempted

Check:

1. Serial cable

2. Instrument address & baud rate

4. Program address & baud rate

If both data status LEDs (TX and RX) are off when trying to communicate

Remove all unnecessary cables and instruments from the bus. Try getting the system to work with only one device (to ease troubleshooting) and then expand the system one device at a time.

Communications slow

Increase the baud rate

Random communication errors

1. Increase the TX delay time

2. Decrease the baud rate

Other symptoms not described above

Call Technical Support for assistance

Note: Certain sequences of events can cause unexpected results. To solve these issues, it is best to start fresh from factory defaults and use the manual as a step by step programming guide, rather than a random approach to programming. To reset the meter to factory defaults, see Reset Meter to Factory Defaults on page 52. In addition, for best results, we recommend using the free MeterView Pro software for all programming needs.

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

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NOTES

Page 57

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ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter

Instruction Manual

PRECISION DIGITAL CORPORATION

233 South Street • Hopkinton MA 01748 USA Tel (800) 343-1001 • Fax (508) 655-8990

www.predig.com

LIM8-7000_F

SFT063 Ver 4.000 & up

05/22

Contact Precision Digital

Technical Support

Call: (800) 610-5239 or (508) 655-7300 Fax: (508) 655-8990 Email: [email protected]

Sales Support

Call: (800) 343-1001 or (508) 655-7300 Fax: (508) 655-8990 Email: [email protected]

Place Orders

Email: [email protected]

For the latest version of this manual please visit

www.predig.com