Protex PD6870 Manuale utente

PD6870 Explosion-Proof Loop-Powered Process 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 Loop-Powered Process Meter

•4-20 mA Input

•1 Volt Drop (4 Volt Drop with Backlight)

•1.0" (25.4 mm) 3½ Digits LCD Display; -1000 to 1999

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

•HART®Protocol Transparent

•Loop-Powered Backlight Option

•Operating Temperature Range: -40 to 75°C (-40 to 167°F)

•Zero & Span Potentiometer Adjustments for Easy Field Scaling

•Conformal Coated PCBs for Dust and Humidity Protection

•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

•Wide Viewing Angle

•Flanges for Wall or Pipe Mounting

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

•Two 3/4" NPT Threaded Conduit Openings (One Plug Installed)

•2" U-Bolt Kits Available

•Stainless Steel Tag Available

•3-Year Warranty

PD6870 Explosion-Proof Loop-Powered Process Meter

Instruction Manual

Disclaimer

The information contained in this document

is subject to change without notice. Precision

Digital Corporation makes no representations

or warranties with respect to the contents hereof;

and specifically disclaims any implied warranties

of merchantability or fitness for a particular

purpose.

•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 alive.

•Cover must be fully engaged to meet

flameproof/explosion-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.

Introduction

The ProtEX-FarVu PD6870 is a rugged, explosion-

proof, loop-powered meter with 1" display digits ideal

for demanding applications in hazardous areas or in

the harshest environmental conditions. The meter

derives all of its power from the 4-20 mA loop with a

small 1 volt drop for easy installation in almost any

system.

The meter is programmed using four easy to access

front-mounted potentiometers with no complex or diffi-

cult to read programming menus necessary for setup.

The numeric display will read from -1000 to 1999 over

a 2000 count user adjustable scaling span. The back-

light option lets you see the display under any lighting

condition and is powered from the 4-20 mA loop with

no additional power supply required.

The enclosure is provided with two threaded conduit

holes and integrated pipe or wall mounting slotted

flanges.

Ordering Information

Model Description

PD6870-0L0 Explosion-Proof Loop-Powered

Process Meter

PD6870-0K0 Explosion-Proof Loop-Powered

Process Meter with Backlight

Accessories

Model Description

PDAPLUG75 3/4" Metal Conduit/Stopping Plug

PDA0001 3/4" M-NPT to F-M20 Reducer

PDA0002 3/4" M-NPT to 1/2" F-NPT Reducer

PDA1024-01 24 VDC Power Supply for DIN Rail

PDA6846

Steel 2" U-Bolt Kit. All Material: Zinc

Plated Steel; (1) U-Bolt for 2" Pipe with

(2 each) Washers, Lock Washers, and

Nuts.

PDA6846-SS

Stainless Steel 2" U-Bolt Kit. All

Material: Stainless Steel; (1) U-Bolt for

2" Pipe with (2 each) Washers, Lock

Washers, and Nuts.

PDA-SSTAG Custom Stainless Steel Tag (see

website for convenient ordering form)

PD6870 Explosion-Proof Loop-Powered Process Meter

Instruction Manual

Accessories

PDA1024-01 24 VDC Power Supply

The PDA1024-01 is a DIN rail mounted 1.5 A,

24 VDC power supply that can be used to power

the 4-20 mA transmitter.

PDA6846 2"U-Bolt Kits

The PDA6846 U-Bolt Kits provides a convenient way

to mount the PD6870 to 1.5" or 2" pipes. They are

available in steel and stainless steel.

PDA-SSTAG Stainless Steel Tag

The PDA-SSTAG is a laser etched stainless steel tag

that can be customized with three lines of text. Each

tag comes with a stainless steel wire and lead seal for

easy mounting wherever you need.

Dimensions

Useful Tools

PD9501 Multi-Function Calibrator

This PD9501 Multi-Function Calibrator has a variety

of signal measurement and output functions, including

voltage, current, thermocouple, and RTD.

PD9502 Low-Cost Signal Generator

The PD9502 is a low-cost, compact, simple to use

4-20 mA or 0-10 VDC signal generator. It can easily

be set for 0-20 mA, 4-20 mA, 0-10 V or 2-10 V

ranges. Signal adjustment is made with a one-turn

knob. A 15-27 VDC wall plug is provided with the in-

strument. Optional USB power bank is available.

PD6870 Explosion-Proof Loop-Powered Process Meter

Instruction Manual

Table of Contents

Introduction......................................................................................................... 2

Ordering Information.......................................................................................... 2

Accessories ........................................................................................................ 3

Specifications ..................................................................................................... 5

General............................................................................................................ 5

Input ................................................................................................................ 5

Product Ratings and Approvals.................................................................... 6

Electromagnetic Compatibility...................................................................... 6

Safety Information.......................................................................................... 6

Installation........................................................................................................... 7

Unpacking....................................................................................................... 7

Pre-Installed Conduit Plug ............................................................................ 7

Mounting ......................................................................................................... 7

Dimensions..................................................................................................... 7

Cover Jam Screw ........................................................................................... 8

Connections ................................................................................................... 8

Wiring Diagrams............................................................................................. 8

Setup ................................................................................................................... 9

Overview ......................................................................................................... 9

Scaling Controls and Display........................................................................ 9

Setting Up the Meter ...................................................................................... 9

Setting the Decimal Point............................................................................. 9

Minimum & Maximum Input Span............................................................ 9

Calibrating the Meter.................................................................................... 9

Factory Default & User Settings.................................................................. 10

Troubleshooting ............................................................................................... 10

Troubleshooting Tips................................................................................... 10

EU Declaration of Conformity.......................................................................... 11

Table of Figures

Figure 1. Enclosure Dimensions – Front View................................................... 7

Figure 2. Enclosure Dimensions – Side Cross Section View ........................... 7

Figure 3. Connector Board .................................................................................. 8

Figure 4. Connections without Backlight ........................................................... 8

Figure 5. Connections with Loop-Powered Backlight....................................... 8

PD6870 Explosion-Proof Loop-Powered Process Meter

Instruction Manual

Specifications

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

General

Display 3 ½ digit LCD

1" (25.4 mm); -1000 to 1999

Display

Orientation

Display may be mounted at 90° increments

up to 270° from default orientation.

Display

Update Rate

2.5 Updates/Second

Backlight White; Loop-powered. Backlight can be

enabled or disabled via alternative wiring of

terminal block. Loop-powered backlight

brightness will increase as the input signal

current increases.

Display

Overrange

Display reads 1 on the left most digit

Programming

Method

Four (coarse and fine for zero and span)

potentiometers accessed when the cover is

removed.

Recalibration Recalibration is recommended at least every

12 months.

Normal Mode

Rejection

60 dB rejection ratio

Environmental

Operating temperature range: -40 to 75°C

Storage temperature range: -40 to 75°C

Relative humidity: 0 to 90% non-condensing

Printed circuit boards are conformally coated.

Connections Screw terminals accept 12 to 22 AWG wire

Enclosure

NEMA 4X, IP68 Explosion-proof die cast

aluminum, 0.30% max copper content,

corrosion resistant epoxy coating,

Color: Blue

Window: Glass

Two ¾" NPT threaded conduit openings.

One ¾" NPT nickel plated brass conduit plug

with 12 mm hex key fitting installed.

Mounting May be mounted directly to conduit.

Two slotted flanges for wall mounting or

NPS 1½" to 2½" or DN 40 to 65 mm pipe

mounting. See Dimensions on page

Overall

Dimensions

5.65" x 5.25" x 4.86" (W x H x D)

(144 mm x 133 mm x 124 mm)

Weight 5.00 lbs (80 oz, 2.27 kg)

Warranty 3 years parts and labor. See Warranty

Information and Terms & Conditions on

www.predig.com for complete details.

Input

Input 4-20 mA

Accuracy

±0.1% of full span ±1 count

Maximum

Voltage Drop &

Equivalent

Resistance

Without

Backlight

With Loop-Powered

Backlight

1 VDC @ 20 mA 4 VDC @ 20 mA

50 Ω @ 20 mA 200 Ω @ 20 mA

Temperature

Drift

150 PPM/°C from -40 to 75°C ambient

Decimal Point

User selectable decimal point

Calibration

Range

4 mA input: -1000 to +1000;

20 mA between 20 and 2000 counts

greater than 4 mA display.

Two point linear display span.

Input Overload

Over current protection to 2 A max.

HART

Transparency

The meter does not interfere with existing

HART communications; it displays the

20 mA primary variable and it allows the

HART communications to pass through

without interruption.

The meter is not affected if a HART

communicator is connected to the loop.

The meter does not display secondary

HART variables.

PD6870 Explosion-Proof Loop-Powered Process Meter

Instruction Manual

Product Ratings and Approvals

Explosion-proof for use in:

Class I, Division 1, Groups B, C and D

Dust-ignition proof for use in:

Class II/III, Division 1, Groups E, F and G; T6

Flame-proof for use in:

Class I, Zone 1, AEx d Group IIC; T6

Protection by Enclosure:

Zone 21, AEx tb IIIC; T85°C

Ta = -40 to 75°C.

Enclosure: Type 4X, IP66.

Certificate number: 3040391

CSA

Explosion-proof for use in:

Class I, Division 1, Groups B, C and D

Dust-ignition proof for use in:

Class II/III, Division 1, Groups E, F and G; T6

Flame-proof for use in:

Zone 1, Ex d IIC T6

Ta = -40 to 75°C.

Enclosure: Type 4X & IP66/IP68.

Certificate number: 2325749

ATEX

II 2 G D. Flame-proof for use in:

Zone 1, Ex d IIC T6 Gb

Protection by Enclosure for use in:

Dust Atmospheres (Zone 21)

Ex tb IIIC T85°C Db IP68.

Ta = -40°C to +75°C

Certificate number: Sira 10ATEX1116X

IECEx Flame-proof for use in:

Zone 1, Ex d IIC T6 Gb

Protection by Enclosure for use in:

Dust Atmospheres (Zone 21)

Ex tb IIIC T85°C Db IP68.

Ta = -40°C to +75°C

Certificate number: IECEx SIR 10.0056X

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 mechani-

cal damage. The cable shall not be subjected to ten-

sion 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.

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 PD6870 must be

installed in accordance with the ATEX directive

2014/34/EU, and the product certificate Sira

10ATEX1116X.

Electromagnetic Compatibility

Emissions EN 61326-1

Safety requirements for measurement,

control, and laboratory use – Industrial

Group 1 Class A ISM emissions

requirements

Radiated

Emissions

Class A

Immunity EN 61326-1

Safety requirements for measurement,

control, and laboratory use

ESD ±4 kV contact,

±8 kV air

RFI –

Amplitude

Modulated

80-1000 MHz @ 10 V/m,

1.4-2.0 GHz @ 3 V/m,

2.0-2.7 GHz @ 1 V/m,

80% AM (1 kHz)

EFT ±2 kV DC mains, ±1 kV other

Telco Surge ±1 kV

CRFI 3 V, 0.15-80 MHz, 1 kHz 80% AM

Safety Information

•Read complete instructions prior to installation

and operation of the meter.

•Installation and service should be performed only

by trained service personnel. Service requiring

replacement of internal components must be

performed at the factory.

•Disconnect from supply before opening

enclosure. Keep cover tight while circuits are

alive. Conduit seals must be installed within 18"

(450mm) of the enclosure.

•Verify that the operating atmosphere of the meter

is consistent with the appropriate hazardous

locations certifications.

•If the meter is installed in a high voltage

environment and a fault or installation error

occurs, high voltage may be present on any lead.

PD6870 Explosion-Proof Loop-Powered Process Meter

Instruction Manual

Installation

For Installation in USA:The PD6870 must be in-

stalled in accordance with the National Electrical

Code (NEC) NFPA 70.

For Installation in Canada:The PD6870 must be in-

stalled in accordance with the Canadian Electrical

Code CSA 22.1. All input circuits must be derived

from a CSA approved Class 2 source.

For European Community: The PD6870 must be in-

stalled in accordance with the ATEX directive

2014/34/EU and the product certificate Sira

10ATEX1116X.

•Installation and service should be performed only

by trained service personnel. Service requiring

replacement of internal components must be

performed at the factory.

•Disconnect from supply before opening

enclosure. Keep cover tight while circuits are

alive. Conduit seals must be installed within

18" (450mm) of the enclosure.

All controls and wiring connections are located on the

display module that is accessed by removing the en-

closure cover. The controls can be accessed without

removing the display module. The wiring connections

can be accessed by removing the display module

which is secured to the enclosure by two captive

screws.

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 Plug

The PD6870 is supplied with one pre-installed conduit

plug for installations that do not require the use of

both conduit entries. The conduit/stopping plug in-

cludes an internal hexagonal socket recess for

removal. The conduit plug and its 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.

Mounting

The PD6870 has two slotted mounting flanges that

may be used for pipe mounting or wall mounting.

Alternatively, the unit may be supported by the

conduit using the conduit holes provided.

Refer to Figure 1 and Figure 2.

•Do not attempt to loosen or remove flange bolts

while the meter is in service.

Dimensions

All units: inches (mm)

Figure 1. Enclosure Dimensions – Front View

Figure 2. Enclosure Dimensions –

Side Cross Section View

Note: The supplied conduit plug may extend up to 0.6

in [15 mm] from the conduit opening when installed.

3.35 (85.1)

2.25 (57.1)

5.25 (133.4)

(143.5)

5.65

(8.2)

0.32

3.35 (85.0)

4.15 (105.5)

3.22 (81.9) (123.5)

4.86

PD6870 Explosion-Proof Loop-Powered Process Meter

Instruction Manual

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 flame-

proof 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.

Caution: Excess torque may damage the threads

and/or wrench.

Connections

To access the wiring connections, remove the enclo-

sure cover and unscrew the two captive screws that

fasten the display module. Signal connections are

made to a three-terminal connector on the rear of the

display module. Grounding connections are made to

the two ground screws provided on the base – one in-

ternal and one external.

S+

4-20 mA signal positive terminal

connection

S-

4-20 mA signal return/negative terminal

connection

B-

4-20 mA signal return/negative terminal when

using the installed loop-powered backlight op-

tion.

Refer to Figure 3 for terminal positions.

•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 meter is installed in a high voltage

environment and a fault or installation error occurs,

high voltage may be present on any lead or

terminal.

Figure 3. Connector Board

Wiring Diagrams

Signal connections are made to a three-terminal con-

nector mounted on the rear of the display module.

The enclosure also provides one internal and one ex-

ternal earth grounding screw.

The 4-20 mA input with no backlight has a maximum

voltage drop of 1 V and is wired as shown in Figure 4.

The loop-powered backlight configuration requires a

total maximum voltage drop of 4 V. The backlight op-

tion is recommended for dim lighting conditions and is

enabled when wired as shown in Figure 5.

Figure 4. Connections without Backlight

Figure 5. Connections with Loop-Powered Backlight

PD6870 Explosion-Proof Loop-Powered Process Meter

Instruction Manual

Setup

Overview

Setting the 4-20 mA input for the desired display is

done using a calibrated 4-20 mA signal source and

the four potentiometers located on the front of the dis-

play module. The cover must be removed to access

these potentiometers. There is also a jumper array for

setting the decimal point.

Scaling Controls and Display

Control Description

LO 4 mA display adjust.

LO FINE 4 mA precision display adjust.

HI 20 mA display adjust.

HI FINE 20 mA precision display adjust.

Setting Up the Meter

Setting the Decimal Point

A decimal point may be set using a three-position

jumper array located on the rear of the display

module. To access the jumper array, unscrew the

two captive screws that fasten the display module.

Remove the display module and place the jumper on

the desired pins as indicated on the board for decimal

point locations of D.DDD, DD.DD, DDD.D, or remove

it if no decimal point is desired.

Minimum & Maximum Input Span

A minimum input span of 20 counts is required be-

tween the 4 mA and 20 mA inputs. A maximum input

span of 2000 counts may be setup between the 4 mA

and 20 mA input.

The meter will not calibrate properly if these minimum

and maximum span ranges are not maintained during

scaling.

Calibrating the Meter

The meter is provided factory calibrated to display

-50.0 at 4 mA and 150.0 at 20 mA.

Apply a 4 mA signal and adjust the LO potentiometers

(coarse and fine) to display the desired reading. Apply

a signal between 16 and 20 mA and adjust the HI po-

tentiometers (coarse and fine) to display the desired

reading. Complete the calibration procedure by mak-

ing minor adjustments to the LO and HI fine potenti-

ometers as necessary.

PD6870 Explosion-Proof Loop-Powered Process Meter

Instruction Manual

Factory Default & User Settings

The following table shows the factory setting for most

of the programmable parameters on the meter. Next

to the factory setting, the user may record the new

setting for the particular application.

Model: ____________________________________

S/N: ______________________________________

Date: _____________________________________

Parameter Default Setting User Setting

Decimal

point

1 place

Calibration

Settings

Input 1

4.00 mA

Display 1

-50.0

Input 2

20.00 mA

Display 2

150.0

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. If the

meter is not working as expected, refer to the recom-

mendations below.

Troubleshooting Tips

Symptom Check/Action

No display Check input signal connections.

Display unsteady

during calibration

Adjust LO FINE or HI FINE con-

trols to fine-tune the display.

Meter displays 1on

the left most digit

location

Check signal level is not over

range.

Dial down the HI control and re-

calibrate at 20 mA.

Display is faded Check input signal is not under

1 mA.

Backlight does not

appear

Verify backlight is installed.

Check signal connections are

as shown in Figure 5on page 8.

Other symptoms

not described

above

Call Technical Support for

assistance.

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