Rosemount 6081-P Wireless pH/ORP Transmitter Manuals & Guides

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6081-P

Wireless pH/ORP Transmitter

Instruction Manual

LIQ_MAN_6081-P

Rev. B

February 2014

Essential Instructions

Read this page before proceeding

Rosemount Analytical designs, manufactures, and tests its products to meet many national and international standards. Because these instruments are sophisticated technical products, you must properly install, use, and

maintain them to ensure they continue to operate within their normal specications. The following instructions

must be adhered to and integrated into your safety program when installing, using, and maintaining Rosemount Analytical products. Failure to follow the proper instructions may cause any one of the following situations to occur: Loss of life; personal injury; property damage; damage to this instrument; and warranty invalidation.

• Read all instructions prior to installing, operating, and servicing the product. If this Instruction Manual is not the

correct manual, telephone 1-800-654-7768 and the requested manual will be provided. Save this Instruction Manual for future reference.

• If you do not understand any of the instructions, contact your Rosemount representative for clarication.

• Follow all warnings, cautions, and instructions marked on and supplied with the product.

• Inform and educate your personnel in the proper installation, operation, and maintenance of the product.

• Install your equipment as specied in the Installation Instructions of the appropriate Instruction Manual and per

applicable local and national codes. Connect all products to the proper electrical and pressure sources.

• To ensure proper performance, use qualied personnel to install, operate, update, program, and maintain the

product.

• When replacement parts are required, ensure that qualied people use replacement parts specied by

Rosemount. Unauthorized parts and procedures can affect the product’s performance and place the safe

operation of your process at risk. Look alike substitutions may result in re, electrical hazards, or improper

operation.

• Ensure that all equipment doors are closed and protective covers are in place, except when maintenance is being performed by qualied persons, to prevent electrical shock and personal injury.

NOTICE

The Rosemount 6081 and all other wireless devices should be installed only after the 1420 Wireless Gateway has been in-

stalled and is functioning properly. Wireless devices should also be powered up in order of proximity from the 1420 Wireless Gateway, beginning with the closest. This will result in a simpler and faster network installation.

NOTICE

Shipping considerations for wireless products (Power Modules): The unit was shipped to you without the power module installed. Please remove the power modules from the unit prior to shipping.

Primary lithium power modules are regulated in transportation by the U. S. Department of Transportation, and are also covered by IATA (International Air Transport Association), ICAO (International Civil Aviation Organization), and ARD (European Ground Transportation of Dangerous Goods). It is the responsibility of the shipper to ensure compliance with these or any other local requirements. Please consult current regulations and requirements before shipping.

The power module with the wireless unit contains two “C” size primary lithium/thionyl chloride power sources.

Each power module contains approximately 5 grams in each pack. Under normal conditions, the power module materials are self-contained and are not reactive as long as the power modules and the pack integrity are maintained. Care should be taken to prevent thermal, electrical or mechanical damage. Contacts should be

protected to prevent premature discharge. Power module hazards remain when cells are discharged.

Power modules should be stored in a clean and dry area. For maximum power module life, storage temperature should not exceed 30 °C.

CAUTION: SENSOR/PROCESS APPLICATION COMPATIBILITY

If a 375 Universal Hart® Communicator is used with these transmitters, the software within the 375 may require modication. If a software modication is required, please contact your local Emerson Process Management Service Group or Nation-

al Response Center at 1-800-654-7768.

About This Document

This manual contains instructions for installation and operation of 398R and 398RVP TUpH

Retractable pH/ORP Sensors. The following list provides notes concerning all revisions of this document.

Rev. Level Date Notes

A 11/08

B 2/14 FM Certication added. Updated document to reect Emerson’s latest

This is the initial release of the product manual. The manual has been reformatted to reflect the Emerson documentation style and updated to reflect any changes in the product offering. This manual

contains information on the HART Smart 6081-P.

documentations style.

Quick Start Guide

For 6081 Wireless pH Transmitter

1. Refer to Section 2.0 Installation for installation instructions. 2 . Wire the pH or ORP sensor to the transmitter. Refer to the sensor instruction sheet for details.

3. Once the connections are secure and veried, install the Power Module to power to the

transmitter.

4. When the transmitter is powered up for the rst time, Quick Start screens appear. Using Quick

Start is easy.

a. A blinking eld shows the position of the cursor.

b. Use the ◄ or ► key to move the cursor left or right. Use the ▲ or ▼ key to move the

cursor up or down or to increase or decrease the value of a digit. Use the ▲ or ▼ key to move the decimal point.

c. Press ENTER to store a setting. Press EXIT to leave without storing changes. Pressing

EXIT also returns the display to the previous screen.

5. Choose a local language.

6. Choose measurement: pH, ORP, or Redox.

7. Choose preamplier location. Select Xmtr to use the integral preamplier in the transmitter.

8. Choose Off or On for displayed diagnostics.

9. Select measurement update rate. Select ENTER to choose an update rate of 1 minute or enter

a value from 1 second to 10 minutes.

10. Choose temperature units: °C or °F

11. Choose Yes to Setup the Wireless Network or No if the Network ID and the Join Key have

already been entered.

12. Enter the 5-digit Wireless Network ID. This ID number must match the Network ID of the

1420 Wireless Gateway.

13. Enter the 8-digit Network Join Key number 1 of 4 to match the Model 1420 Wireless Gateway. See the Note below for clarication.

14. Enter Network Join Key numbers 2, 3, and 4 to match the Model 1420 Wireless Gateway.

15. The transmitter will exit Quick Start and display the live measurement screen.

16. To change the Network ID or Join Key, HART address, or measurement-related settings from the default values, and to set security codes, press MENU. Select Program and follow the

prompts. Refer to the appropriate menu tree.

17. To return the transmitter to default settings, choose Reset Analyzer in the Program menu.

Note regarding Wireless Device Configuration

In order to communicate with the 1420 Wireless Gateway, and ultimately the Information

System, the transmitter must be congured to communicate with the wireless network. This step

is the wireless equivalent of connecting wires from a transmitter to the information system.

Using a Field Communicator or AMS, enter the Network ID and Join Key so that they match the Network ID and Join Key of the gateway and other devices in the network. The Network Join Key consists of four (4) blocks, each with an eight digit code. The code of each block must match its corresponding block in the 1420 in order for the 6081 to join the network.

If the Network ID and Join Key are not identical, the transmitter will not communicate with the network. The Network ID and Join Key may be obtained from the 1420 Wireless Gateway on the Setup>Network>Settings page on the web server.

The nal device network conguration piece is the Update Rate. This by default is one (1) minute.

This may be changed at commissioning, or at any time via AMS or the 1420 Wireless Gateway’s web server. The Update Rate should be between 1 second and 10 minutes.

When device conguration is completed, remove the power module and replace the rear cover

of the transmitter until the time of actual live installation in the process. Tighten the cover to the proper tension for safety approvals.

Quick Start

English Francais Espanol >>

Measure? pH

Redox ORP

Use Preamp in?

Xmtr Sensor

Diagnostics? On Off

Measure update rate: 1min

Temperature in?

°C °F

Setup Wireless

Network? Yes No

Deutsch Italiano Portuguese >>

Wireless Network

HART Poll Address

Network ID:

00000

Network Join Key

1 of 4: 00000000

Network Join Key

2 of 4: 00000000

Network Join Key 3 of 4: 00000000

Network Join Key

4 of 4: 00000000

Wireless Network

HART Poll Address

HART Polling Address: 00

Section Title Instruction Manual

February 2014 LIQ_MAN_6081-P

Figure 1-1 Menu Tree for 6081 pH Wireless Transmitter

Instruction Manual Section Title

LIQ_MAN_6081-P February 2014

Contents

Section 1: Description and Specifications

1.1 Features and Application ......................................................................................1

1.2 Specications - General ............................................................................ ......... .1

1.3 Specications - Wireless ....................................................................................... 1

1.4 Specications - Functional ....................................................................................2

1.5 Product Certications ...........................................................................................3

1.6 HART Communications ........................................................................................3

1.7 Asset Management Solutions ...............................................................................3

Section 2: Installation

2.1 Considerations ....................................................................................................5

2.2 Unpacking and Inspection ...................................................................................5

2.3 Pre-Installation set up .......................................................................................... 5

2.4 Mechanical Installation ........................................................................................ 6

2.5 Ground the Transmitter ....................................................................................... 6

2.6 Power Module Installation ...................................................................................9

Section 3: Wiring

3.1 General Information ........................................................................................... 11

3.2 Sensor Wiring .................................................................................................... 11

Section 4: Intrinsically Safe Installation

4.1 Instrinsically Safe Installation ..............................................................................13

Section 5: Commissioning

5.1 Network Communications ................................................................................. 17

5.2 Device Network Conguration ...........................................................................17

5.3 Verify Operation ................................................................................................ 17

Section 6: Display and Operation

6.1 Display ...............................................................................................................19

6.2 Keypad ..............................................................................................................20

6.3 Menu – pH ........................................................................................................ 20

6.4 Information Screen Messages ........................................................................... 20

6.5 Security ............................................................................................................. 20

Section 7: Operation with 375 Hart Communicator

7.1 Note on 375 HART COmmunicator .................................................................... 21

7.2 Connecting the HART Communicator ................................................................21

7.3 Operation .......................................................................................................... 22

Section 8: Programming the Transmitter

8.1 General ..............................................................................................................23

8.2 Changing Start-up Settings ................................................................................ 23

8.3 Choosing and Conguring the Analytical Measurement ..................................... 23

8.4 Choosing Temperature Units and Manual or Auto Temperature Compensation .24

8.5 Setting a Security Code ..................................................................................... 24

8.6 Making HART-Related Settings ........................................................................... 25

8.7 Resetting Factory Calibration and Factory Default Settings ...............................25

8.8 Selecting a Default Screen and Screen Contrast ................................................ 25

8.9 Choosing a Display Timeout ............................................................................... 26

Contents i

Section Title Instruction Manual

February 2014 LIQ_MAN_6081-P

Contents (continued)

Section 9: Calibration of Temperature

9.1 Introduction ...................................................................................................... 27

9.2 Calibration - Temperature .................................................................................27

Section 10: Calibration –pH and ORP

10.1 Introduction ......................................................................................................29

10.2 Procedure – Auto Buffer Calibration .................................................................30

10.3 Procedure – Manual Two-Point Buffer Calibration ..............................................31

10.4 Procedure – Standardization ............................................................................31

10.5 Procedure – Entering a Known Slope Value .......................................................32

10.6 ORP Calibration ................................................................................................32

Section 11: Maintenance

11.1 Overview ...........................................................................................................33

11.2 Transmitter Maintenance ...................................................................................33

11.3 pH Sensor Maintenance ....................................................................................33

11.4 ORP Sensor Maintenance ...................................................................................34

11.5 Calibration ........................................................................................................35

11.6 Power Module Replacement ..............................................................................35

Section 12: Return of Material

Return of Material .............................................................................................37

List of Figures

2-1 Wall Mounting Installation for 6081 ..................................................................................7

2-2 Pipe Mounting Installation for 6081 ...................................................................................8

2-3 Removing Rear Cover ........................................................................................................ 9

2-4 Power Module Warning Label ............................................................................................ 9

2-5 Installing the Power Module .............................................................................................. 9

2-6 Securing the rear cover .................................................................................................... 10

3-1 6081 Sensor Wiring and Connection Points ..................................................................... 11

4-1 FM IS Installation ............................................................................................................. 13

4-2 CSA IS Installation ............................................................................................................14

4-3 ATEX IS Installation .......................................................................................................... 15

6-1 Displays During Normal Operation ..................................................................................19

6-2 6081 Keypad ..................................................................................................................20

7-1 6081 Sensor Wiring and Connection Points .................................................................... 21

10-1 Calibration Slope and Offset ...........................................................................................30

11-1 Checking the Potential of the Reference Electrode .......................................................... 34

ii Contents

Instruction Manual Description and Specifications

LIQ_MAN_6081-P February 2014

Section 1: Description and Specications

• High accuracy and reliability for monitoring applications

• Self-organizing network for high data reliability and network stability

• Industry Leading wireless Security

• Compatible with 1420 Wireless gateway and Emerson Process Management WirelessHART

networks

• Easy to read two-line display with easy to use menus

• WirelessHART 7 Digital Communications

• SMART Sensor Enabled

• Continuous diagnostics monitor sensor performance and health

1.1 Description and Specifications

The 6081-P transmitter is ideal for monitoring applications, especially in hard-to-reach or costprohibitive locations. The 6081-P measures pH and ORP and is compatible with most Rosemount Analytical pH and ORP sensors. The transmitter has a rugged, cast aluminum weatherproof

and corrosion-resistant enclosure (NEMA 4X). The transmitter includes a two-line 16-character display with simple and intuitive menu screens. Plain language prompts in six (6) local languages

guide the user through the programming and calibration procedures. The 6081 is compatible with non-preamp pH and ORP sensors and SMART pH sensors from Rosemount Analytical.

Installation and start-up of the 6081-P wireless transmitter is simple. Just power the 6081-P and assign it to a wireless network with a 1420 Gateway. The unit will auto-locate the most efcient path to the host and will begin transmitting measurement data immediately via 2.4 GHz wireless communications. The Self-Organizing Network ensures exceptional data reliability and network stability. All of Emerson Process Management’s wireless devices employ Encryption, Authentication, Verication, Anti-Jamming and Key Management to ensure data transmission and

security. Rosemount Analytical devices include intelligent power management to reduce power

consumption and extend power module life while delivering highly reliable measurements with

rich HART data and diagnostic information. HART digital communication allows access to AMS (Asset Management Solutions) for live process variables, useful diagnostics and troubleshooting information.

1.2 Specifications - General

Enclosure: Cast aluminum. NEMA 4X. Dimensions: 6.55” x 5.40” x 5.15” (166mm x 137mm x 131mm) Conduit Openings: 3/4” FNPT Ambient Temperature: 32 to 122°F (0 to 50°C) Storage Temperature: -4 to 158°F (-20 to 70°C) Relative Humidity: 0 to 95% (non-condensing) Weight/Shipping Weight: 7 lbs/8 lbs (3.2/3.6 kg) RFI/EMI: EN-61326

Digital Communications: HART 7 WirelessHART

1.2.1 Specications - Wireless

Output: Wireless enabled HART 7.0 Transmit Rate: User selectable. Antenna: PBT/PC integrated omni-directional antenna

1.3 Specifications - Wireless

Output: WirelessHART V7 Transmit Rate: User selectable, 1/sec. to 1/60 min (via 1420 wireless Gateway or AMS) Measurement update rate: 1/sec. to 1/10 min Antenna: PBT/PC integrated omni-directional antenna

Description and Specications 1

Description and Specifications Instruction Manual

February 2014 LIQ_MAN_6081-P

Radio Frequency: 2.4 GHz DSSS Transmission distance - line of sight: about 600 ft (ideal RF conditions and power

module condition)

Power: Lithium thionyl chloride long life power module

1.4 Functional Specifications

pH Range: 0 to 14 ORP Range: -1400 to +1400mV Compatible with Rosemount Analytical SMART pH sensors calibrations/standardization:

The automatic buffer recognition uses stored buffer values and their temperature curves for the most common buffer standards available worldwide. The transmitter also performs a

stabilization check on the sensor in each buffer.

A manual two-point calibration is made by immersing the sensor in two different buffer solutions and entering the pH values. The microprocessor automatically calculates the slope which is used for self-diagnostics. An error message will be displayed if the pH sensor is faulty. This slope can be read on the display and/or manually adjusted if desired. An on-line one-point process standardization is accomplished by entering the pH or ORP value of a grab sample. The following calibration methods are supported:

- Two point calibration with Low and High buffer (pH only)

- Two point calibration with Automatic Buffer recognition (pH only)

- Single point standardization

- Single point Temperature Adjustment

- Automatic calibration upon live connection to RAI SMART pH sensors and upload of

stored cal data to transmitter

Automatic Temperature Compensation: External 3-wire Pt100 RTD or Pt1000 RTD located in

the sensor, compensates the pH reading for temperature uctuations. Compensation covers the range -10 to 150 °C (14 to 302 °F). Manual temperature compensation is also selectable.

Accuracy: ±1 mV @ 25 °C ±0.01 pH Repeatability: ±1 mV @ 25 °C ± 0.01 pH Information and Status: Information screens display faults and warnings, radio transmission

status, network ID number, Power Module voltage, transmitter model, and software version.

Diagnostics: The internal diagnostics can detect:

RTD Failure Glass Low Failure Glass High Failure

Broken Glass Fault

Reference High Failure

CPU Error

High Temperature Warning Low Temperature Warning Glass Impedance High Warning Glass Impedance Low Warning Reference Impedance High Warning

EEPROM Warning

Sense Line Open Warning Factory Cal Warning

Keyboard Warning

Once a fault or warning is detected, the display will show a message describing the problem.

Temperature Range: -10 to 150°C (PT100 and PT1000) Display: 2-line, 16 character display supports display of pH and mV units. Display shows

temperature.

Approvals:

RFI/EMI: EN-61326

NOTE on ESD

“Change due to disturbance caused by electrostatic discharge will be less than 0.2 pH.”

2 Description and Specications

Instruction Manual Description and Specifications

LIQ_MAN_6081-P February 2014

1.5 Product Certifications

Telecommunication Compliance

All wireless devices require certication to ensure that they adhere to regulations regarding the use of the RF spectrum. Nearly every country requires this type of product certication. Emerson is working with governmental agencies around the world to supply fully compliant products and remove the risk of violating country directives or laws governing wireless device usage.

FCC and IC

This device complies with Part 15 of the FCC Rules. Operation is subject to the following conditions: This device may not cause harmful interference, this device must accept any interference received, including interference that may cause undesired operation. This device must be installed to ensure a minimum antenna separation distance of 20 cm from all persons.

1.6 HART Communications

1.6.1 Overview of HART Communication

HART (highway addressable remote transducer) V.7 supports a wireless digital communication

system. The HART protocol, originally developed by Fisher-Rosemount, is now overseen by the

independent HART Communication Foundation. The Foundation ensures that all HART devices can communicate with one another. For more information about HART communications, call

the HART Communication Foundation at (512) 794-0369. The internet address is http://www.

hartcomm.org.

1.6.2 HART Interface Devices

HART communicators allow the user to view measurement data (pH, ORP and temperature), program the transmitter, and download information from the transmitter for transfer to a computer for analysis. Downloaded information can also be sent to another HART transmitter.

Either a hand-held communicator, such as the Rosemount Model 375, or a computer can be used.

HART interface devices operate fromthe HART taps inside the rear enclosure. If your communicator does not recognize the Model 6081 pH/ORP transmitter, the device description library may need updating. Call the manufacturer of your HART communication device for updates.

1.7 Asset Management Solutions

Asset Management Solutions (AMS) is software that helps plant personnel better monitor the performance of analytical instruments, pressure and temperature transmitters, and control valves. Continuous monitoring means maintenance personnel can anticipate equipment failures

and plan preventative measures before costly breakdown maintenance is required.

AMS uses remote monitoring. The operator, sitting at a computer, can view measurement data, change program settings, read diagnostic and warning messages, and retrieve historical data from any HART-compatible device, including the Model 6081-P transmitter. Although AMS allows access to the basic functions of any HART compatible device, Rosemount Analytical has developed additional software for that allows access to all features of the Model 6081-P transmitter.

AMS can play a central role in plant quality assurance and quality control. Using AMS Audit Trail,

plant operators can track calibration frequency and results as well as warnings and diagnostic

messages. The information is available to Audit Trail whether calibrations were done using the

infrared remote controller, the Model 375 HART communicator, or AMS software. AMS operates in Windows 95. AMS communicates through a HART-compatible modem with

any HART transmitters, including those from other manufacturers. AMS is also compatible with FoundationÔ Fieldbus, which allows future upgrades to Fieldbus instruments. Rosemount Analytical AMS windows provide access to all transmitter measurement and

conguration variables. The user can read raw data, nal data, and program settings and can recongure the transmitter from anywhere in the plant.

Description and Specications 3

Description and Specifications Instruction Manual

February 2014 LIQ_MAN_6081-P

This page left blank intentionally

4 Description and Specications

Instruction Manual Installation

LIQ_MAN_6081-P February 2014

Section 2: Installation

2.1 Considerations

The transmitter can be commissioned before or after installation. It may be useful to commission it on the bench, before installation, to ensure proper operation and to become familiar with

its functionality. When applicable, make sure the instruments are installed in accordance with intrinsically safe or non-incendive eld wiring practices. The device will be powered whenever the power module is installed. To avoid depleting the power module, make sure it is removed when

the device is not in use.

Power module

The 6081 is battery powered. The power module with the wireless unit contains 2 “C” size

primary lithium/thionyl chloride batteries. Each power module contains approximately .5 grams

of lithium. Under normal conditions, the power module materials are self-contained and are not

reactive as long as the power module integrity is maintained. Care should be taken to prevent

thermal, electrical or mechanical damage. Contacts should be protected to prevent premature discharge. Use caution when handling the power module. The power module may be damaged if

dropped from heights in excess of 20 feet.

Sensor

Make sensor connections through the cable entry in the enclosure. Be sure to provide adequate

clearance for cover removal.

Environmental

Verify that the operating atmosphere of the transmitter is consistent with the appropriate hazardous locations certications.

2.2 Unpacking and Inspection

Inspect the shipping container. If it is damaged, contact the shipper immediately for instructions.

Save the box. If there is no apparent damage, remove the transmitter. Be sure all items shown on the packing list are present. If items are missing, immediately notify Rosemount Analytical. Save the shipping container and packaging. They can be reused if it is later necessary to return

the transmitter to the factory.

2.3 Pre-Installation Set-up

2.3.1 Temperature Element

The 6081-P pH/ORP transmitter is compatible with sensors having Pt 100 and Pt 1000. Sensors from other manufacturers may have a Pt 1000 RTD. For Rosemount Analytical sensors, the type of temperature element in the sensor is printed on the tag attached to the sensor cable. For the majority of sensors manufactured by Rosemount Analytical, the RTD IN lead is red and the

RTD RTN lead is white. The 328A sensor has no RTD. The 320HP system has a readily identiable

separate temperature element. Resistance at room temperature for common RTDs is given in the table.

If the resistance is... the temperature element is a about 110 ohms Pt 100 RTD about 1100 ohms Pt 1000 RTD

2.3.2 Reference Electrode Impedance

The standard silver-silver chloride reference electrode used in most industrial and laboratory pH

electrodes is low impedance. EVERY pH and ORP sensor manufactured by Rosemount Analytical

has a low impedance reference. Certain specialized applications require a high impedance reference electrode. The transmitter must be re-programmed to recognize the high impedance reference.

Installation 5

Installation Instruction Manual

February 2014 LIQ_MAN_6081-P

2.3.3 Preamplier Location

pH sensors produce a high impedance voltage signal that must be preamplied before use. The signal can be preamplied before it reaches the transmitter or it can be preamplied in the transmitter. To work properly, the transmitter must know where preamplication occurs.

Although ORP sensors produce a low impedance signal, the voltage from an ORP sensor is

amplied the same way as a pH signal.

If the sensor is wired to the transmitter through a junction box, the preamplier is ALWAYS in either the junction box or the sensor. Junction boxes can be attached to the sensor or installed some distance away. If the junction box is not attached to the sensor, it is called a remote junction box. In most junction boxes used with the 6081-P pH/ORP, a at, black plastic box attached to the same circuit board as the terminal strips houses the preamplier. The preamplier housing in the 381+ sensor is crescent shaped.

If the sensor is wired directly to the transmitter, the preamplier can be in the sensor or in the transmitter. If the sensor cable has a GREEN wire, the preamplier is in the sensor. If there is no green wire, the sensor cable will contain a coaxial cable. A coaxial cable is an insulated wire surrounded by a braided metal shield. Depending on the sensor model, the coaxial cable terminates in either a BNC connector or in a separate ORANGE wire and CLEAR shield.

2.4 Mechanical Installation

When choosing an installation location and position, take into account the need for access to

the transmitter. For best performance, the antenna should be vertical with some space between

objects in a parallel metal plane such as a pipe or metal framework, as the pipes or framework

may adversely affect the performance of the antenna.

2.5 Ground the Transmitter

The electronics enclosure should be grounded in accordance with local and national installation codes. This can be accomplished via the process connection, via the internal case grounding

terminal, or via the external grounding terminal.

mV and RTD Inputs

Each process installation has different requirements for grounding. Use the grounding options recommended by the facility for the specic sensor type, or begin with grounding Option 1 (the

most common).

WARNING

Failure to follow these installation guidelines could result in death or serious injury.

• Make sure only qualied personnel perform the installation. Explosions could result in death or serious injury.

• Before connecting a 375 Field Communicator in an explosive atmosphere, make sure the instruments are installed in accordance with intrinsically safe or non-incendive eld wiring practices.

• Verify that the operating atmosphere of the transmitter is consistent with the appropriate hazardous locations certications. Process leaks could result in death or serious injury. Electrical shock could cause death or serious injury.

• Use extreme caution when making contact with the leads and terminals.

6 Installation

Instruction Manual Installation

LIQ_MAN_6081-P February 2014

2.4.2 Mounting on a Flat Surface

Figure 2-1. Wall Mounting Installation Model 6081. Use Pipe/Wall Mounting Bracket Kit, PN 23820-00 Note: PN 23820-00 mounting bracket kit includes mounting hardware for pipe mounting only. Wall mounting hardware to be provided by customer. Only use suitable fasteners and hardware to securely fasten the bracket and transmitter to the wall surface.

Installation 7

Installation Instruction Manual

February 2014 LIQ_MAN_6081-P

2.4.3 Pipe Mounting

The pipe mounting kit (PN 23820-00/01) accommodates 1–½ to 2 in. pipe.

Figure 2-2. Pipe Mounting Installation Model 6081. Use Pipe/Wall Mounting Bracket Kit, PN 23820-00

8 Installation

Instruction Manual Installation

LIQ_MAN_6081-P February 2014

2.6 Power Module Installation

The section describes the procedure for installation of the power module (PN 701PBKKF or PN 00753-9220-0001). The power module should stored in a safe place with a controlled

environment until the 6081 is ready for live operation. For rst time installation of the power

module, follow these steps:

1. Unscrew the two long machine screws to remove the rear cover of the 6081. Separate the rear cover from the central housing by manually prying the sections apart. Do not use screwdrivers or tools to separate these housing parts. The parts are sealed with an o-ring.

Figure 2-3. Removing rear cover

2. Before installation, note the safety warning, disposal instructions and part information on the connection-side label of the power module.

Figure 2-4. Power Module Warning Label

3. With the 6081 front display section facing away from you, align the power module pack with the curved surface of the pack facing towards you and the small protruding connector facing away from you. Make sure to align the power module and its keyed connector with the connection receptacle in the middle of the instrument’s terminal block area.

Figure 2-5. Installing the Power Module

Installation 9

Installation Instruction Manual

February 2014 LIQ_MAN_6081-P

4. With gentle pressure, insert the keyed connector on the power module into the receptacle

(labeled Power Module Connection on the drawing). The power module seats in the connection receptacle with an o-ring.

5. Conrm that the power module is fully inserted in the receptacle and properly aligned with the surrounding terminal block.

6. Replace the rear cover of the 6081 with the two screws to secure it to the central housing. Tighten screws and verify operation. Correct installation the rear cover will ensure that the power modules properly secured to power the transmitter.

Figure 2-6 .Securing the rear cover

To remove the power module, reverse the installation steps.

NOTE

A damaged or degraded o-ring may compromise the NEMA 4X/IP66 rating of the unit even when the rear cover is correctly installed. Please take care to protect the o-ring when removing and replacing the rear

cover of the transmitter.

10 Installation

Instruction Manual Sensor Wiring

LIQ_MAN_6081-P February 2014

Section 3: Sensor Wiring

3.1 General Information

pH and ORP sensors without preamps manufactured by Rosemount Analytical can be wired directly to the 6081-P wireless transmitter.

3.2 Sensor Wiring

To assist in sensor wiring, please refer to the one of the following resources:

1. Sensor Instruction Sheet – provided with each shipped sensor. Detailed wiring drawings show

terminal block connections for each sensor lead.

2. Online wiring program available at http://www.emersonprocess.com/raihome/liquid/

products/wiring/Xmt displays wiring schematics for all compatible pH sensors.

3. CD-ROM included in every shipped instrument unit contains Rosemount Analytical’s wiring

program.

NOTE

For additional wiring information on this product, including sensor combinations not shown here, please

refer to either our online wiring programs or the Manual DVD enclosed with each product.

1056, 1057, 56, 5081, 6081, 54e, and XMT : http://www3.emersonprocess.com/raihome/sp/liquid/wiring/XMT/

1066 and sensors with SMART preamps: http://www2.emersonprocess.com/en-US/brands/rosemountan-

alytical/Liquid/Sensors/Pages/Wiring_Diagram.aspx 1055: http://www3.emersonprocess.com/raihome/sp/liquid/wiring/1055/

NOTE

All sensor wiring must be rated for ≥ 70 °C.

The following drawing identies each terminal block lead position for pH sensors.

Figure 3-1. Sensor Wiring & Connection Points for 6081

Sensor Wiring 11

Sensor Wiring Instruction Manual

February 2014 LIQ_MAN_6081-P

This page left blank intentionally

12 Sensor Wiring

Instruction Manual Intrinsically Safe Installation

This document contains information proprietary to

Rosemount Analytical, and is not to be made available

to those who may compete with Rosemount Analytical.

RELEASE DATE

REV

NOTES: UNLESS OTHERWISE SPECIFIED

1700672

ECO NO

DRAWN

CHECKED

ENG APPR

B. JOHNSON

APPROVALS

TITLE

SCALE:

WEIGHT:

SHEET 1 OF 1

DATE

ROSEMOUNT

ANALYTICAL

Emerson

PROCESS MANAGEMENT

FINISH

MATERIAL

DIMENSIONS ARE IN INCHES

REMOVE BURRS & SHARP EDGES

MACHINE FILLET RADII .020 MAX

NOMINAL SURFACE FINISH: 125

ANGLES ± 1/2°.

.XX ± .03 .XXX ± .010

THIS FILE CREATED USING

SOLID EDGE

THIS DOCUMENT IS

CERTIFIED BY

REV

REVISIONS NOT PERMITTED

W/O AGENCY APPROVAL

SIZE

DWG NO

1700672

REV

5-1-08

J. PERKINS

S. PACI S

4-30-10

CERT PROD, MODEL

6081 XMTR I.S. (FM)

APR 29, 10

LQD10112

1:1

LTR ECO DESCRIPTION

DATE

REVISION

CHECKED/APPROVED

LQD10215 SEE ECO CH

5-18-11

JP/ SP

MARK ED AS

6081-A-BB-CCC

WHERE:

A = P (pH) OR C (CONDUCTIVITY)

BB = 67 (FM APPROVED)

CCC = ANY 3 DIGIT NUMBER (COUNTRY CODE)

APPROVED MODELS

OVERALL DIMENSIONS

2X NEOPRENE O-RING

PN 9550344

(Mc MASTER-CARR PART NO. 4679T281

MADE OF BLACK BUNA-N,

-65°C TO +275°F COT)

DISP LAY INT ERFACE PCB

PN 24298-00

FRONT NORYL LCD FRAME

PN 34163-00

RETAINER, LCD

PN 34254-00

POLYCARBONATE

14 PIN RBBON CABLE

PN 24224-00

ALUMINUM BASE

PN 34181-00

NEOPRENE

O-RING

PN 9550343

POLY CARBON ATE

ADAPTE R

PN 9160629

NORYL

PIN GUIDE

PN 34148-00

3/4 -14NPT

ALUMINUM

REAR COVER

PN 34182-00

POLY CARBONATE

ANTEENA

PN 9160628

6.55

166.44

4.80

121.92

1. PCB MATERIALS HAVE CTI

175. ALL OTHER INSULATING MATERIALS HAVE CTI

100.

NEOPRENE SPACER RING

PN 34149-00

POLYURETHANE

RING PN 9160626

ALUMI NUM WAVE RING

PN 9160627

POLY CARBONATE

INS ULATOR

PN 34183-00

SILICONE PIN SEAL

PN 34150-00

POWER MO DULE

PN 00753-9220-0001

NORYL BUSHING

PN 9160630

NORYL TERMINAL

INS ULATOR

PN 34146-00

MYLAR WIRING DIAGRAM LABEL

PN 9241688-00

LCD MODULE

PN 9010443

GENCY CERTIFICATION LABEL

3. ENCLOSURE MEETS THE REQUIREMENTS OF IP66.

THIS DRAWING HAS BEEN SUBMITTED

FOR HAZARDOUS LOCATION

APPROVAL. ANY CHANGES TO THIS

DRAWING REQUIRE AGENCY

APPROVAL.

2 ALUMINUM FRONT COVER, ALUMINUM BASE AND ALUMINUM REAR COVER ARE MADE OF ALUMINUM

356C OR ALUMINUM ALLOY A413.0 OR ALUMINUM ALLO Y A3600 .0. THE SE MATE RIALS C ONTAIN L ESS THAN

6 % MAGNESSIUM. PAINT MANUFACTURER: CADINAL, PART NO. 6442, BLUE.

WIRELES S PCB W/2.4 GHz

HART 7 RADIO

PN 24295-00 OR

PN 24296-00

INTERFACE PCB

PN 24356-00 OR

PN 24357-00

2X NEOPRENE

O-RING

PN 9550342

WINDOW, FI LLER

PN 34255-00

NORYL DISPLAY

FRAME PN 34175-00

POLYESTER AGENCY

CERTIFICATION LABEL

PN 9241685-01

NORYL TERMINAL

BLOCK PN 34145-00

ALUMINUM

FRONT COVER

PN 34180-00

POLYESTER

KEYPAD/OVERLAY

PN 34259-00

OPTIONALLY INSTALLED ALUMINUM

OR BRASS PLUG WITH TEFLON TAPE

(2X)

4. THE PAINT ON THE OUTER SURFACE OF THE ENCLOSURE IS LESS THAN 0.2mm THICK.

OPTI ONAL

SPECTRUM APPROVAL

INFORMATION

ASSEMBLY LOCATION

('ASSEMBLED IN MEXICO'

OR 'MADE IN USA')

MODEL NUMBER

SERIAL NUMBER INCLUDES DATE CODE

LIQ_MAN_6081-P February 2014

Section 4: Intrinsically Safe Installation

Figure 4-1. FM IS Installation

Intrinsically Safe Installation 13

Intrinsically Safe Installation Instruction Manual

February 2014 LIQ_MAN_6081-P

Figure 4-2. CSA IS Installation

1700673

CHECKED/APPROVED

DATE

REVISION

LTR ECO DESCRIPTION

THIS DOCUMENT IS

APPROVED MODELS

JP/DOC

5-18-11

LQD10215 SEE ECO CH

REV

CERTIFIED BY

6081-C-69-XXX

6081-P-69-XXX

WHERE XXX=COUNTRY CODE

EXAMPLE:108=BRAZIL

ALUMINUM

REAR COVER

POLYURETHANE

RING

ALUMINUM

WAVE R ING

NORYL BUSHING

NEOPRENE

SPACER RING

POWER MO DULE

PN 00753-9920-0001

MYLAR WIRING

DIAGR AM LABE L

NORYL TERMINAL

W/O AGENCY APPROVAL

REVISIONS NOT PERMITTED

INTERFACE PCB

PN 24356-00 OR

PN 24357-00

NEOPRENE

O-RING

2X NEOPRENE

BLOCK

NORYL TERMINAL

INSU LATOR

SILICONE

O-RING

6.55

4.80

POLYESTER AGENCY

CERTIFI CATION LABEL

PIN S EAL

3/4-14NPT

ALUMINUM BASE

OPTIONALLY INSTALLED ALUMINUM

OR BRASS PLUG WITH TEF LON TAPE

(2X)

REV

ANALYTICAL

ROSEMOUNT

Emerson

166.44

121.92

PROCESS MANAGEMENT

DATE

OVERALL DIMENSIONS

APPROVALS

DIMENSIONS ARE IN INCHES

REMOVE BURRS & SHARP EDGES

THIS DRAWING HAS BEEN SUBMITTED

FOR HAZARDOUS LOCATION

APPROVAL. ANY CHANGES TO THIS

SHEET 1 OF 1

WEIGHT:

1700673

6081 XMTR I.S.(CSA)

CERT PROD, MODEL

1:1

DWG NO

SIZE

TITLE

SCALE:

5-9-10

5-5-08

5-5-10

J. PERKINS

DRAWN

ANGLES ± 1/2°.

NOMINAL SURFACE FINISH: 125

MACHINE FILLET RADII .020 MAX

DRAWING REQUIRE AGENCY

APPROVAL.

C. HOANG

D, CROWLEY

THIS FILE CREATED USING

SOLID EDGE

ENG APPR

CHECKED

.XX ± .03 .XXX ± .010

FINISH

MATERIAL

REV

LQD10154

ECO NO

MAY 21, 10

RELEASE DATE

NORYL

PIN GUIDE

POLY CARBON ATE

POLY CARBONATE

ANTENNA

IN THIS AREA, PRINT:

1400335 IF 6081P,

1400336 IF 6081C

MODEL 6081

1. PCB MATERIALS HAVE CTI> 175. ALL OTHER INSULATING MATERIALS HAVE CTI >100.

3. ENCLOSURE MEETS THE REQUIREMENTS OF NEMA 4X AND IP66.

2 MATERIAL: ALUMINUM ALLOY CONTAINING LESS THAN 6% BY WEIGHT OF MAGNESIUM.

NOTES: UNLESS OTHERWISE SPECIFIED

Rosemount Analytical, and is not to be made available

to those who may compete with Rosemount Analytical.

This document contains information proprietary to

HAZARDOUS AREA WHEN CONNECTED PER DWG

GROUPS A, B, C, D, E, F & G

INTRINSICALLY SAFE FOR CLASS I, II & III, DIVISION 1,

WARNING: COMPONENT SUBSTITUTION MAY IMPAIR INTRINSIC SAFETY

OR SUITABILITY FOR DIVISION 2

SUPPLY: USE ONLY WITH ROSEMOUNT SMART POWER MODULE P/N 753-9220-0001

OUTPUT: WIRELESS HART (2.4 GHz) FCC ID: LW2RM2510 / IC ID: 2731A-RM2510 IS CONTAINED WITHIN.

ADAPTE R

WIRELES S PCB

W/2.4 GHz

HART 7 RADIO

PN 24295-00 OR

PN 24322-00

POLY CARBON ATE

14 PIN RBBON CABLE

9241685-02/B

POLY CARBON ATE

INSU LATOR

-LR 34186

DWG 1700673

2:1

AGENCY CERTIFICATION LABEL

°CT4 Tamb = 65

S/N: SW VER#

ENCLOSURE TYPE: NEMA 4/4X IP66

DUST IGNITION PROOF CLASS II AND III, DIVISION 1,GROUPS E, F & G

NON-INCENDIVE CLASS I, DIVISION 2 GROUPS A, B, C & D

RETAINER, LCD

PN 34254-00

WINDOW, FILLER

DISP LAY INT ERFACE PCB

PN 24298-00

LCD MODULE

FRONT NORYL

LCD F RAME

2X NEOPRENE O-RING

PN 34255-00

POLY CARBONATE

OR POLYESTER

KEYPAD/OVERLAY

ALUMINUM

FRONT COVER

NORYL

DISPLAY

FRAM E

14 Intrinsically Safe Installtion

Instruction Manual Intrinsically Safe Installation

LIQ_MAN_6081-P February 2014

Figure 4-3. ATEX IS Installation

1700673

CHECKED/APPROVED

DATE

REVISION

LTR ECO DESCRIPTION

THIS DOCUMENT IS

APPROVED MODELS

JP/DOC

5-18-11

LQD10215 SEE ECO CH

REV

CERTIFIED BY

6081-C-69-XXX

6081-P-69-XXX

WHERE XXX=COUNTRY CODE

EXAMPLE:108=BRAZIL

ALUMINUM

REAR COVER

POLYURETHANE

RING

ALUMINUM

WAVE R ING

NORYL BUSHING

NEOPRENE

SPACER RING

POWER MO DULE

PN 00753-9920-0001

MYLAR WIRING

DIAGR AM LABE L

NORYL TERMINAL

W/O AGENCY APPROVAL

REVISIONS NOT PERMITTED

INTERFACE PCB

PN 24356-00 OR

PN 24357-00

NEOPRENE

O-RING

2X NEOPRENE

BLOCK

NORYL TERMINAL

INSU LATOR

SILICONE

O-RING

6.55

4.80

POLYESTER AGENCY

CERTIFI CATION LABEL

PIN S EAL

3/4-14NPT

ALUMINUM BASE

OPTIONALLY INSTALLED ALUMINUM

OR BRASS PLUG WITH TEF LON TAPE

(2X)

REV

ANALYTICAL

ROSEMOUNT

Emerson

166.44

121.92

PROCESS MANAGEMENT

DATE

OVERALL DIMENSIONS

APPROVALS

DIMENSIONS ARE IN INCHES

REMOVE BURRS & SHARP EDGES

THIS DRAWING HAS BEEN SUBMITTED

FOR HAZARDOUS LOCATION

APPROVAL. ANY CHANGES TO THIS

SHEET 1 OF 1

WEIGHT:

1700673

6081 XMTR I.S.(CSA)

CERT PROD, MODEL

1:1

DWG NO

SIZE

TITLE

SCALE:

5-9-10

5-5-08

5-5-10

J. PERKINS

DRAWN

ANGLES ± 1/2°.

NOMINAL SURFACE FINISH: 125

MACHINE FILLET RADII .020 MAX

DRAWING REQUIRE AGENCY

APPROVAL.

C. HOANG

D, CROWLEY

THIS FILE CREATED USING

SOLID EDGE

ENG APPR

CHECKED

.XX ± .03 .XXX ± .010

FINISH

MATERIAL

REV

LQD10154

ECO NO

MAY 21, 10

RELEASE DATE

NORYL

PIN GUIDE

POLY CARBON ATE

POLY CARBONATE

ANTENNA

IN THIS AREA, PRINT:

1400335 IF 6081P,

1400336 IF 6081C

MODEL 6081

1. PCB MATERIALS HAVE CTI> 175. ALL OTHER INSULATING MATERIALS HAVE CTI >100.

3. ENCLOSURE MEETS THE REQUIREMENTS OF NEMA 4X AND IP66.

2 MATERIAL: ALUMINUM ALLOY CONTAINING LESS THAN 6% BY WEIGHT OF MAGNESIUM.

NOTES: UNLESS OTHERWISE SPECIFIED

Rosemount Analytical, and is not to be made available

to those who may compete with Rosemount Analytical.

This document contains information proprietary to

HAZARDOUS AREA WHEN CONNECTED PER DWG

GROUPS A, B, C, D, E, F & G

INTRINSICALLY SAFE FOR CLASS I, II & III, DIVISION 1,

WARNING: COMPONENT SUBSTITUTION MAY IMPAIR INTRINSIC SAFETY

OR SUITABILITY FOR DIVISION 2

SUPPLY: USE ONLY WITH ROSEMOUNT SMART POWER MODULE P/N 753-9220-0001

OUTPUT: WIRELESS HART (2.4 GHz) FCC ID: LW2RM2510 / IC ID: 2731A-RM2510 IS CONTAINED WITHIN.

ADAPTE R

WIRELES S PCB

W/2.4 GHz

HART 7 RADIO

PN 24295-00 OR

PN 24322-00

POLY CARBON ATE

14 PIN RBBON CABLE

9241685-02/B

POLY CARBON ATE

INSU LATOR

-LR 34186

DWG 1700673

2:1

AGENCY CERTIFICATION LABEL

°CT4 Tamb = 65

S/N: SW VER#

ENCLOSURE TYPE: NEMA 4/4X IP66

DUST IGNITION PROOF CLASS II AND III, DIVISION 1,GROUPS E, F & G

NON-INCENDIVE CLASS I, DIVISION 2 GROUPS A, B, C & D

RETAINER, LCD

PN 34254-00

WINDOW, FILLER

DISP LAY INT ERFACE PCB

PN 24298-00

LCD MODULE

FRONT NORYL

LCD F RAME

2X NEOPRENE O-RING

PN 34255-00

POLY CARBONATE

OR POLYESTER

KEYPAD/OVERLAY

ALUMINUM

FRONT COVER

NORYL

DISPLAY

FRAM E

Intrinsically Safe Installation 15

Intrinsically Safe Installation Instruction Manual

February 2014 LIQ_MAN_6081-P

16 Intrinsically Safe Installation

Instruction Manual Commissioning

LIQ_MAN_6081-P February 2014

Section 5: Commissioning

5.1 Network communications

The 6081 will receive any HART communications from a handheld Field Communicator, or AMS.

When using a Field Communicator, any conguration changes must be sent to the transmitter by using the Send key (F2). AMS conguration changes are implemented when the Apply button is clicked.

AMS Wireless and Direct Connections. AMS is capable of connecting to devices either directly,

using a HART modem, or wirelessly via the 1420. When conguring on the bench using a HART modem, double click the device icon (or right click and select Congure/Setup), then choose the Congure/Setup tab. Congure the device settings using the Direct Connection menu. When conguring wirelessly via the 1420, double click the device icon (or right click and select Congure/Setup), then choose the Congure/Setup tab. Congure the device settings using the

Wireless Connection menu. The 6081 and all other wireless devices should be installed only after the 1420 Wireless Gateway

has been installed and is functioning properly. Wireless devices should also be powered up in

order of proximity from the 1420 Wireless Gateway, beginning with the closest device to the

1420. This will result in a simpler and faster network installation.

5.2 Device network configuration

In order to communicate with the 1420 Wireless Gateway, and ultimately the Information

System, the transmitter must be congured to communicate with the wireless network. This step

is the wireless equivalent of connecting wires from a transmitter to the information system. Using

a Field Communicator or AMS, enter the Network ID and Join Key so that they match the Network ID and Join Key of the gateway and other devices in the network. If the Network ID and Join Key are not identical, the transmitter will not communicate with the network. The Network ID and Join Key may be obtained from the 1420 Wireless Gateway on the Setup>Network>Settings page on the web server. The nal device network conguration piece is the Update Rate. This by

default is 1 minute. This may be changed at commissioning, or at any time via AMS or the 1420 Wireless Gateway’s web server. The Update Rate should be between 1 second and 10 minutes.

For networks of up to 100 wireless devices, fastest Update Rate is 60 seconds. For networks of 50

or fewer devices, the fastest Update Rate is 15 seconds.

When device conguration is completed, remove the power module and replace the power

module cover. Tighten the cover to the proper tension for safety approvals. To access the

Network Settings using a 375 Field Communicator, enter the following Fast Key Sequence: 1, 3, 3.

5.3 Verify Operation

Operation can be veried in three locations, at the device via the Local Display, using the 375 Field

Communicator, or at the Gateway via the 1420 Wireless Gateway’s integrated web server.

Local Display: During normal operation, the LCD will display the PV value at the wireless transmit

rate up to as fast as 1 second intervals. Refer to LCD Screen. Access the information screens by

pressing the down key to display the TAG, Device ID, Network ID, Network Join Status and Device

Status screens. For Device Status screens. 375 Field Communicator: To verify device operation using a HART Field Communicator, a 6081

DD is required. 1420 Wireless Gateway: To verify device operation using the 1420 Wireless Gateway’s

integrated web server, navigate to the Explorer>Status page. This page will show whether the device has joined the network and if it is communicating properly. If the Model 6081 was congured with the Network ID and Join Key and sufcient time for network polling has passed, the transmitter will be connected to the network. To verify connectivity, open the 1420 Wireless Gateway’s integral web interface and navigate to the Explorer>Status page.

Commissioning 17

Commissioning Instruction Manual

February 2014 LIQ_MAN_6081-P

This page will display the transmitter’s tag, PV, SV, TV, QV, Last Update, Update Rate, Power Module Voltage, and Status. A green status indicator means that the device is working properly. A red indicator means that there is a problem with either the device or its communication path. For more detail on a specic device, click on the tag

name.

Troubleshooting

The most common cause of incorrect operation is the Network ID and Join Key. The Network ID and Join Key in the device must match that of the 1420 Wireless Gateway. The Network ID and Join Key may be obtained from the 1420 Wireless Gateway on the Setup>Network>Settings page on the web server.

Remove power module: After the sensor and network have been congured, remove the power module and

replace the transmitter cover. The power module should be inserted only when the device is ready to be commissioned.

18 Commissioning

Instruction Manual Display and Orientation

LIQ_MAN_6081-P February 2014

Section 6: Display and Operation

6.1. Display

The 6081 has a two-line display. Generally, the user can program the transmitter to show one of

three displays. If the transmitter has been congured to measure ORP or Redox, similar displays

are available. Figure 6-1 shows the displays available for pH. The transmitter has information screens that supplement the data in the main display. Press to view the information screens. The

rst information screen shows the type of measurement being made (pH, ORP, Redox). The last information screen is the software version number. During calibration and programming, key presses cause different displays to appear. The displays are self-explanatory and guide the user

step-by-step through the procedure.

Figure 6.1 Displays During Normal Operation

Screen A shows the pH reading, the temperature, and the output current generated

by the transmitter. Screen B shows the same information as Screen A except the output

current has been substituted with the raw sensor voltage. Screen C is most useful while troubleshooting sensor problems.

Display and Orientation 19

Display and Orientation Instruction Manual

February 2014 LIQ_MAN_6081-P

6.2 Keypad

Figure 6-2 shows the 6081 keypad.

Figure 6-2. 6081 Keypad

Four arrow keys move the cursor around the screen. A blinking word or numeral show the position of the cursor. The arrow keys are also used to change the value of a numeral. Pressing ENTER stores numbers and settings and moves the display to the next screen. Pressing EXIT returns to the previous screen without storing changes. Pressing MENU followed by EXIT causes

the main display to appear.

Pressing EXIT ends action on the current

screen without storing changes. The display returns to the previous screen.

Pressing MENU causes the Menu screen

to appear, or the live screen to appear if the display has timed out.

EXIT

ENTER

Pressing an arrow key moves the cursor in the

direction indicated. If the cursor is on a numeral, pressing ◄ or ► moves the cursor left or right across the number. Pressing ▼ or ▲ decreases or increases the value of the selected digit.

If the cursor is on a number, pressing ENTER stores

the number. If the cursor is on a submenu or an item

in a menu, pressing ENTER selects it. The display changes to the next screen

6.3 Menu - pH

The 6081 pH transmitter has four menus: CALIBRATE, PROGRAM, SIM PV, and DISPLAY. Under the Calibrate and Program menus are several sub-menus. For example, under CALIBRATE, the sub-menus are Temperature and pH or ORP/Redox. Under each sub-menu are prompts. Under

PROGRAM, the sub-menus for 6081 are, Temp, Measurement, Security, HART, Diagnostics, and

Reset Analyzer. The DISPLAY menu allows the user to congure the main display information elds

and to adjust the LCD display contrast.

6.4 Information Screen Messages

Whenever a warning or fault limit has been exceeded, the transmitter displays diagnostic

messages to aid in troubleshooting. “Fault” or “Warn” appears in the main display to alert the user of an adverse condition. The display alternates between the regular display and the Fault or Warning message. If more than one warning or fault message has been generated, the messages appear alternately.

6.5 Security

6.5.1 How the Security Code Works

Use security codes to prevent accidental or unwanted changes to program settings, displays, and calibration. Two three-digit security codes can be used to do the following…

a. Allow a user to view the default display and information screens only. b. Allow a user access to the calibration and hold menus only. c. Allow a user access to all the menus.

1. If a security code has been programmed, pressing MENU causes the security screen to appear.

2. Enter the three-digit security code. a. If a security code has been assigned to congure only, entering it will unlock all the menus. b. If separate security codes have been assigned to calibrate and congure, entering the

calibrate code will allow the user access to only the calibrate and hold menus; entering the

conguration code will allow the user access to all menus.

3. If the entered code is correct, the main menu screen appears. If the code is incorrect, the

Invalid Code screen appears. The Enter Security Code screen reappears after two seconds.

Refer to section 8.5 to program the security codes.

20 Display and Orientation

Instruction Manual Operation with 375 HART Communicator

LIQ_MAN_6081-P February 2014

Section 7: Operation with 375 HART

Communicator

7.1 Note on the 375 HART Communicator

The 375 HART Communicator is a product of Emerson Process Management, Rosemount Inc. This section contains selected information on using the 375 with the Rosemount Analytical 6081 Transmitter. For complete information on the 375 Communicator, see the 375 instruction manual. For technical support on the 375 Communicator, call Rosemount Inc. at (800) 999-9307

within the United States. Support is available worldwide on the internet at http://rosemount. com.

7.2 Connecting the HART Communicator

Figure 7-1. shows how the 275 or 375 Communicator connects to the output lines from the 6081

Transmitter.

Figure 7.1. 6081 Sensor Wiring & Connection Points

Operation with 375 HART Communicator 21

Operation with 375 HART Communicator Instruction Manual

February 2014 LIQ_MAN_6081-P

7.3 Operation

7.3.1 Off-line and On-line Operation

The 375 Communicator features off-line and on-line communications. On-line means the

communicator is connected to the transmitter in the usual fashion. While the communicator is on line, the operator can view measurement data, change program settings, and read diagnostic messages. Off-line means the communicator is not connected to the transmitter. When the communicator is off line, the operator can still program settings into the communicator. Later, after the communicator has been connected to a transmitter, the operator can transfer the programmed settings to the transmitter. Off-line operation permits settings common to several transmitters to be easily stored in all of them.

7.3.2 Making HART related settings from the keypad

1. Press MENU. The main menu screen appears. Choose Program.

2. Choose >>.

3. Choose HART.

4. To display the device ID, choose DevID. To change the polling address, choose PollAddrs. To

make burst mode settings, choose Burst. To change the preamble count, choose Preamble.

22 Operation with 375 HART Communicator

Instruction Manual Programming the Transmitter

LIQ_MAN_6081-P February 2014

Section 8: Programming the Transmitter

8.1 General

This section describes how to program the transmitter using the keypad.

1. Select the measurement to be made (pH, ORP, or Redox).

2. Choose temperature units and automatic or manual temperature mode.

3. Set a security code.

4. Make certain settings relating to HART communication.

5. Resetting factory default settings.

6. Selecting a default display screen and adjusting screen contrast.

8.2 Changing Start-up

When the 6081 is powered up for the rst time, startup screens appear. The screens prompt the

user to enter the measurement being made, to identify the sensor being used, to select automatic or manual pH correction and to select temperature units. If incorrect settings were entered at startup, enter the correct settings now. To change the measurement, refer to Section 8.4.

8.3 Choosing and Configuring the Analytical Measurement

8.3.1 Purpose

This section describes how to do the following:

1. Congure the transmitter to measure pH, ORP, or Redox.

2. Determine the location of the preamp.

3. If pH was selected, there are additional selections and settings to make:

a. choose a solution temperature correction curve or set a temperature coefcient constant

b. choose sensor isopotential c. set reference impedance low or high

8.3.2 Denitions

1. MEASUREMENT. The transmitter can be congured to measure pH, ORP or Redox (opposite sign of ORP).

2. pH SETTINGS. If pH is selected, there are additional settings to make. a. PREAMPLIFIER. The raw pH signal is a high impedance voltage. A voltage follower or

preamplier, located either in the sensor or transmitter, converts the high impedance signal

into a low impedance one. Normally, high impedance signals should be sent no further than about 15 feet.

b. REFERENCE OFFSET. Ideally, a pH sensor in pH 7 buffer should have a voltage of 0 mV. The

difference between the measured voltage in pH 7 buffer and the ideal value is the reference

offset. Typically, the reference offset is less than 60 mV.

c. DIAGNOSTICS. The 6081 continuously monitors the pH sensor for faults. If it detects a fault,

the transmitter displays a fault message.

d. GLASS IMPEDANCE. The transmitter monitors the condition of the pH-sensitive glass

membrane in the sensor by continuously measuring the impedance across the membrane.

Typical impedance is between 100 and 500 MΩ. Low impedance (<10 MΩ) implies the glass bulb has cracked and the sensor must be replaced. An extremely high impedance (>1000 MΩ) implirs the sensor is aging and may soon need replacement. High impedance might

also mean that the glass membrane is no longer immersed in the process liquid.

3. INPUT FILTER. The raw sensor current can be ltered to reduce noise. Filtering also increases

the response time. The lter is the time required for the input to reach 63% of its nal reading

following a step change.

8.3.3 Procedure to congure: Measurement.

To choose a menu item, move the cursor to the item and press ENTER.

Programming the Transmitter 23

Programming the Transmitter Instruction Manual

February 2014 LIQ_MAN_6081-P

To store a number or setting, press ENTER.

1. Press MENU. The main menu screen appears. Choose Program.

2. Choose Measurement.

3. Choose pH, Redox, or OR P.

If you chose pH, do steps 5 through 9. If you chose ORP or Redox, do step 10.

4. Enter the correct preamplier location. The default setting is within the transmitter.

5. For measure sampling rate, select 1 second to 10 minutes by scrolling through choices. Press

ENTER.

6. Choose Soln Temp Corr or Sensor Isoptntl.

7. For Soln Temp Corr, choose Off, UltraPure, HighpH, or Custom. For Custom, enter the

desired temperature coefcient.

8. For Sensor Isoptntl, enter the desired sensor isopotential pH. Do not change the sensor

isopotential pH unless the sensor is known to have an isopotential pH different from 7.00.

9. Choose Low or High Reference Impedance to match the installed sensor’s reference impedance

signal. The default setting is Low Impedance to match standard pH sensors. Press EXIT twice to

return to the Program menu.

10. If Redox or ORP was selected, there are no further settings to make. Press EXIT to return to the

Program menu.

11. To return to the main display, press MENU followed by EXIT.

8.4 Choosing Temperature Units and Manual or Automatic Temperature Compensation

8.4.1 Purpose

This section describes how to do the following:

1. Choose temperature display units (°C or °F).

2. Choose automatic or manual temperature compensation.

3. Enter a temperature for manual temperature compensation

8.4.2 Denitions

1. Automatic Temperature Compensation. The analyzer uses a temperature-dependent factor

to convert measured cell voltage to pH. In automatic temperature compensation, the analyzer measures the temperature and automatically calculates the correct conversion factor. For

maximum accuracy, use automatic temperature compensation.

2. Manual Temperature Compensation. In manual temperature compensation, the analyzer

converts measured voltage to pH using the temperature entered by the user. It does not use the actual process temperature. Do NOT use manual temperature compensation unless the

process temperature varies no more than about ±2 °C or the pH is between 6 and 8. Manual

temperature compensation is useful if the sensor temperature element has failed and a replacement sensor is not available. If manual temperature correction is selected, the display will not show the measured temperature. It will show the manually entered value.

8.4.3 Procedure: Temperature.

To choose a menu item, move the cursor to the item and press ENTER. To store a number or setting, press ENTER.

1. Press MENU. The main menu screen appears. Choose Program.

2. Choose Temp.

3. Choose °C/F to change temperature units. Choose Live/Manual to turn on (Live) or turn off

(Manual) automatic temperature compensation.

a. If °C/F is chosen, select °C or °F in the next screen. b. If Live/Manual is chosen, select Live or Manual in the next screen. c. If Manual is chosen, enter the temperature in the next screen. The temperature entered in this

step will be used in all subsequent measurements, no matter what the process temperature is.

24 Programming the Transmitter

Instruction Manual Programming the Transmitter

LIQ_MAN_6081-P February 2014

8.5 Setting a Security Code

8.5.1 Purpose

This section describes how to set a security code. There are three levels of security:

a. A user can view the default display and information screens only. b. A user has access to the calibration menus only. c. A user has access to all menus.

The security code is a three-digit number. The table shows what happens when security codes are assigned to Calib (calibration) and Config (congure). In the table XXX and YYY are the assigned security codes.

Code assignments

What happensCalib Config

000 XXX User enters XXX and has access to all menus. XXX YYY User enters XXX and has access to calibration menus only. User enters YYY

and has access to all menus. XXX 000 User needs no security code to have access to all menus. 000 000 User needs no security code to have access to all menus.

8.5.2 Procedure: Setting a security code.

1. Press MENU. The menu screen appears. Choose Program.

2. Choose >>.

3. Choose Security.

4. Choose Calib or Config. a. If you chose Calib, enter a three-digit security code. b. If you chose Config, enter a three-digit security code.

5. To return to the main display, press MENU the EXIT.

8.6 Making the HART Related Settings

For more information refer to Section 1.

8.7 Resetting Factory Calibration and Factory Default Settings

8.7.1 Purpose

This section describes how to install factory calibration and default values. The process also

clears all fault messages and returns the display to the rst quick start screen.

8.7.2 Procedure: Installing default settings

1. Press MENU. The menu screen appears. Choose Program.

2. Choose >>.

3. Choose >>.

4. Choose ResetTransmitter.

5. Choose Yes or No. Choosing Yes clears previous settings and calibrations and returns the

transmitter to the rst quick start screen

Programming the Transmitter 25

Programming the Transmitter Instruction Manual

February 2014 LIQ_MAN_6081-P

8.8 Selecting a Default Screen and Screen Contrast

8.8.1 Purpose

This section describes how to do the following:

1. Set a default screen. The default screen is the screen shown during normal operation. The

6081 allows the user to choose from a number of screens. Which screens are available

depends on the measurement the transmitter is making.

2. Change the screen contrast.

8.8.2 Procedure: Choosing a display screen.

1. Press MENU. The menu screen appears. Choose Display.

2. Choose Default Display.

3. Press êuntil the desired screen appears. Press ENTER.

4. The display returns to the screen in step 2. Press MENU then EXIT to return to the main

display.

8.8.3 Procedure: Changing screen contrast.

1. Press MENU. The menu screen appears. Choose Display.

2. Choose Display Contrast.

3. To increase the contrast, select darker. Press ENTER. Each key press increases the contrast.

To reduce the contrast, select lighter, Press ENTER. Each key press decreases the contrast.

4. To return to the main display, press MENU then EXIT.

NOTE

Screen contrast can also be adjusted from the main display. Press MENU and é at the same time to increase contrast. Press MENU and ê at the same time to decrease contrast. Repeatedly pressing the arrow key increases or reduces the contrast.

8.9 Choosing a Display Timeout

8.9.1 Purpose

The local transmitter screen will timeout to preserve power module life. The transmitter will

continue to receive measurement inputs and continue to transmit to the wireless network as

programmed.

8.9.2 Procedure: Programming the display timeout

1. Press MENU to activate the live display.

2. Press MENU again. The menu screen appears. Choose Display.

3. Choose >>.

4. Select Display Timeout. Press ENTER.

5. Using the up and down keys, enter a value from 01 sec. to 999 sec. Press ENTER.

6. To return to the main display, press MENU then EXIT.

26 Programming the Transmitter

Instruction Manual Calibration - Temperature

LIQ_MAN_6081-P February 2014

Section 9: Calibration – Temperature

9.1 Introduction

The Calibrate Menu allows the user to calibrate the pH, ORP (or redox), and temperature

response of the sensor.

9.2 Calibrating Temperature

9.2.1 Purpose

Temperature affects the measurement of pH in three ways.

1. The analyzer uses a temperature dependent factor to convert measured cell voltage to pH. Normally, a slight inaccuracy in the temperature reading is unimportant unless the pH reading

is signicantly different from 7.00. Even then, the error is small. For example, at pH 12 and 25 °C, a 1 °C error produces a pH error less than ±0.02.

2. During auto calibration, the 6081 recognizes the buffer being used and calculates the actual pH of the buffer at the measured temperature. Because the pH of most buffers changes only slightly with temperature, reasonable errors in temperature do not produce large errors in the

buffer pH. For example, a 1 °C error causes at most an error of ±0.03 in the calculated buffer pH.

3. The 6081 can be programmed to calculate and display pH at a reference temperature

(25 °C). The maximum change in solution pH with temperature is about ±0.04 pH/°C, so a 1°C

temperature error does introduce a small error. However, the major source of error in solution

temperature compensation is using an incorrect temperature coefcient.

Temperature affects the measurement of ORP in a complicated fashion that is best determined

empirically. Without calibration the accuracy of the temperature measurement is about ±0.4°C.

Calibrate the sensor/analyzer combination if:

1. ±0.4 °C accuracy is not acceptable

2. the temperature measurement is suspected of being in error. Calibrate temperature

by making the analyzer reading match the temperature measured with a standard

thermometer.

9.2.2 Procedure

1. Remove the sensor from the process. Place it in an insulated container of water along with a calibrated thermometer. Submerge at least the bottom two inches of the sensor. Stir continuously.

2. Allow the sensor to reach thermal equilibrium. For some sensors, the time constant

for a change in temperature is 5 min., so it may take as long as 30 min. for temperature

equilibration.

3. If the sensor cannot be removed from the process, measure the temperature of a owing sample taken from a point as close to the sensor as possible. Let the sample continuously overow an insulated container holding a calibrated thermometer.

4. Change the 6081 display to match the calibrated thermometer using the procedure below.

1. Press MENU. The menu screen appears. Choose Calibrate.

2. Choose Temp.

3. If transmitter was programmed in Section 8.4 to use the actual process temperature, go to

step 7. If the transmitter was programmed to use a temperature entered by the user, go to

step 9.

4. To calibrate the temperature, change the number in the second line to match the

temperature measured with ;the standard thermometer. Press ENTER.

5. Press MENU then EXIT to return to the main display.

6. If the temperature value shown in the display is not correct, use the arrow keys to change

it to the desired value. The transmitter will use the temperature entered in this step in all measurements and calculations, no matter what the true temperature is.

7. Press MENU then EXIT to return to the main display.

Calibration - Temperature 27

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February 2014 LIQ_MAN_6081-P

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28 Section Title

Instruction Manual Calibration - pH and ORP

LIQ_MAN_6081-P February 2014

Section 10: Calibration - pH and ORP

10.1 Introduction

For pH sensors, two-point buffer calibration is standard. Both automatic calibration and manual calibration are available. Auto calibration avoids common pitfalls and reduces errors. Its use is recommended. In auto calibration the 6081 calculates the actual pH of the buffer from the nominal value entered by the user and does not accept calibration data until readings are stable. In manual calibration the user enters buffer values and judges when readings are stable. The pH reading can also be standardized, that is, forced to match the reading from a referee instrument.

Finally, if the user knows the electrode slope (at 25°C), he can enter it directly.

The ORP calibration is a single-point calibration against an ORP standard. A new pH sensor must be calibrated before use. Regular recalibration is also necessary. A pH measurement cell (pH sensor and the solution to be measured) can be pictured as a battery

with an extremely high internal resistance. The voltage of the battery depends on the pH of

the solution. The pH meter, which is basically a voltmeter with a very high input impedance, measures the cell voltage and calculates pH using a conversion factor. The actual value of the voltage-to-pH conversion factor depends on the sensitivity of the pH sensing element (and the temperature). The sensing element is a thin, glass membrane at the end of the sensor. As the glass membrane ages, the sensitivity drops. Regular recalibration corrects for the loss of sensitivity. pH calibration standards, also called buffers, are readily available.

In automatic calibration the transmitter recognizes the buffer and uses temperature-corrected pH values in the calibration. The table below lists the standard buffers the controller recognizes.

The controller also recognizes several technical buffers: Merck, Ingold, and DIN 19267. Temperature-pH data stored in the controller are valid between at least 0 and 60 °C.

pH at 25 °(nominal pH) Standard(s)

1.68 NIST, DIN 19266, JSI 8802, BSI (see note 1)

3.56 NIST, BSI

3.78 NIST

4.01 NIST, DIN 19266, JSI 8802, BSI

6.86 NIST, DIN 19266, JSI 8802, BSI

7.00 (see note 2)

7.41 NIST

9.18 NIST, DIN 19266, JSI 8802, BSI

10.01 NIST, JSI 8802, BSI

12.45 NIST, DIN 19266

NOTE

NIST is National Institute of Standards, DIN is Deutsche Institute für Normung, JSI is Japan Standards Institute, and BSI is British Standards Institute.

NOTE

cover of the transmitter.

During automatic calibration, the transmitter also measures noise and drift and does not accept calibration data until readings are stable. Calibration data will be accepted as soon as the pH reading is constant to within the factory-set limits of 0.02 pH units for 10 seconds. The stability settings can be changed. In manual calibration, the user judges when pH readings are stable. He

also has to look up the pH of the buffer at the temperature it is being used and enter the value

in the transmitter. Once the transmitter completes the calibration, it calculates the calibration

slope and offset. The slope is reported as the slope at 25 °C. Figure 10-1 denes the terms. The

Calibration - pH and ORP 29

Calibration - pH and ORP Instruction Manual

February 2014 LIQ_MAN_6081-P

and offset. The slope is reported as the slope at 25 °C. Figure 10-1 denes the terms. The transmitter can also be standardized. Standardization is the process of forcing the transmitter reading to match the reading from a second pH instrument. Standardization is sometimes called a onepoint calibration.

Figure 10-1. Calibration Slope and Offset

10.2 Procedure - Auto Buffer Calibration

1. Obtain two buffer solutions. Ideally, the buffer values should bracket the range of pH values to

be measured.

2. Remove the pH sensor from the process liquid. If the process and buffer temperatures are appreciably different, place the sensor in a container of tap water at the buffer temperature. Do not start the calibration until the sensor has reached the buffer temperature. Thirty minutes is usually adequate.

3. Press MENU. The main menu appears. Choose Calibrate.

4. Choose pH.

5. Choose BufferCal.

6. Choose Auto.

7. To continue with the calibration, choose Buffer1.Then go to step 8. To change stability criteria,

choose Setup and go to step 19.

8. Rinse the sensor with water and place it in buffer 1. Be sure the glass bulb and the reference

junction are completely submerged. Swirl the sensor.

9. The screen at left is displayed with “Wait” ashing until the reading is stable. The default

stability setting is <0.02 pH change in 10 sec. To change the stability criteria, go to step 19.

When the reading is stable, the screen in step 10 appears.

10. The top line shows the actual reading. The transmitter also identies the buffer and displays

the nominal buffer value (buffer pH at 25 °C). If the displayed value is not correct, press or to display the correct value. The nominal value will change, for example from 7.01 to 6.86 pH. Press ENTER to store.

11. The screen at left appears momentarily.

12. The screen at left appears. Remove the sensor from Buffer 1, rinse it with water, and place it in

Buffer 2. Be sure the glass bulb and the reference junction are completely submerged. Swirl the sensor. Choose Buffer2.

13. The screen at left is displayed with “Wait” ashing until the reading is stable. When the

reading is stable, the screen in step 14 appears.

14. The top line shows the actual reading. The transmitter also identies the buffer and displays

the nominal buffer value (buffer pH at 25°C). If the displayed value is not correct, press or to display the correct value. The nominal value will change, for example from 9.91 to 10.02 pH. Press ENTER to store.

15. The screen at the left appears momentarily.

16. If the calibration was successful, the transmitter will display the offset and slope (at 25°). The

30 Calibration - pH and ORP

Instruction Manual Calibration - pH and ORP

LIQ_MAN_6081-P February 2014

display will return to the screen in step 6.

17. If the slope is out of range (less than 45 mV/pH or greater than 60 mV/pH) or if the offset

exceeds the value programmed in Section 8.4, an error screen appears. The display then

returns to the screen in step 6.

18. To return to the main display, press MENU then EXIT.

19. Choosing Setup in step 7 causes the Buffer Stabilize screen to appear. The transmitter will not

accept calibration data until the pH reading is stable. The default requirement is a pH change less than 0.02 units in 10 seconds. To change the stability criteria:

19.a. Enter the desired stabilization time

19.b. Enter the minimum amount the reading is permitted to change in the time specied in

step

20. To return to the main display, press MENU then EXIT.

10.3 Procedure–Manual Two-Point Buffer Calibration

1. Obtain two buffer solutions. Ideally, the buffer values should bracket the range of pH values to

be measured.

2. Remove the pH sensor from the process liquid. If the process and buffer temperatures are

appreciably different, place the sensor in a container of tap water at the buffer temperature. Do not start the calibration until the sensor has reached the buffer temperature. Thirty minutes is

usually adequate. Make a note of the temperature.

3. Press MENU. The main menu appears. Choose Calibrate.

4. Choose pH.

5. Choose BufferCal.

6. Choose Manual.

7. Choose Buffer1.

8. Rinse the sensor with water and place it in buffer 1. Be sure the glass bulb and reference

junction are completely submerged. Swirl the sensor.

9. The reading in the top line is the live pH reading. Wait until the live reading is stable. Then,

use the arrow keys to change the reading in the second line to the match the pH value of the

buffer. The pH of buffer solutions is a function of temperature. Be sure to enter the pH of the buffer at the actual temperature of the buffer.

10. Remove the sensor from buffer 1 and rinse it with water. Place it in buffer 2. Be sure the glass

bulb and the reference junction are completely submerged. Swirl the sensor. Choose Buffer2.

11. The reading in the top line is the live pH reading. Wait until the live reading is stable. Then,

use the arrow keys to change the reading in the second line to the match the pH value of the

buffer. The pH of buffer solutions is a function of temperature. Be sure to enter the pH of the buffer at the actual temperature of the buffer.

12. The screen at left appears momentarily.

13. If the calibration was successful, the transmitter will display the offset and slope (at 25°). The

display will return to the screen in step 5.

14. If the slope is out of range (less than 45 mV/pH or greater than 60 mV/pH) or if the offset

exceeds the value programmed in Section 8.4, an error screen appears. The display then

returns to the screen in step 6.

15. To return to the main display, press MENU then EXIT.

10.4 Procedure–Standardization

1. The pH measured by the transmitter can be changed to match the reading from a second or

referee instrument. The process of making the two readings agree is called standardization.

2. During standardization, the difference between the two values is converted to the equivalent

voltage. The voltage, called the reference offset, is added to all subsequent measured cell voltages before they are converted to pH. If after standardization the sensor is placed in a buffer solution, the measured pH will differ from the buffer pH by an amount equivalent to the standardization offset.

3. Install the pH sensor in the process liquid.

4. Once readings are stable, measure the pH of the liquid using a referee instrument.

5. Because the pH of the process liquid may change if the temperature changes, measure the pH

of the grab sample immediately after taking it.

6. For poorly buffered samples, it is best to determine the pH of a continuously owing sample

Calibration - pH and ORP 31

Calibration - pH and ORP Instruction Manual

February 2014 LIQ_MAN_6081-P

from a point as close as possible to the sensor.

7. Press MENU. The main menu appears. Choose Calibrate.

8. Choose pH.

9. Choose Standardize.

10. The top line shows the present reading. Use the arrow keys to change the pH reading in the

second line to match the pH reading from the referee instrument.

11. The screen at left appears if the entered pH was greater than 14.00 or if the mV offset

calculated by the transmitter during standardization exceeds the reference offset limit

programmed into the transmitter. The display then returns to step 10. Repeat the

standardization. To change the reference offset from the default value (60 mV), see section

8.4.

12. If the entry was accepted the display returns to step 9.

13. To return to the main display, press MENU then EXIT.

10.5 Procedure–Entering a Known Slope Value

1. If the electrode slope is known from other measurements, it can be entered directly into the

transmitter. The slope must be entered as the slope at 25°C. To calculate the slope at 25°C from the slope at temperature t° C, use the equation:

slope at 25 °C = (slope at t°C)

Changing the slope overrides the slope determined from the previous buffer calibration.

2. Press MENU. The main menu appears. Choose Calibrate.

3. Choose pH.

4. Choose slope.

5. The screen at left appears briey.

6. Change the slope to the desired value. Press ENTER.

7. The slope must be between 45 and 60 mV/pH. If the value entered is outside this range, the

screen at left appears.

8. If the entry was accepted, the screen at left appears.

9. To return to the main display, press MENU then EXIT.

10.6 ORP Calibration

10.6.1 Purpose

1. For process control, it is often important to make the measured ORP agree with the ORP of a

standard solution.

2. During calibration, the measured ORP is made equal to the ORP of a standard solution at a

single point.

10.6.2 Preparation of ORP standard solutions

ASTM D1498-93 gives procedures for the preparation of iron (II) - iron (III) and quinhydrone ORP standards. The iron (II) - iron (III) standard is recommended. It is fairly easy to make, is not

particularly hazardous, and has a shelf life of about one year. In contrast, quinhydrone standards

contain toxic quinhydrone and have only an eight-hour shelf life.

Iron (II) - iron (III) standard is available from Rosemount Analytical as PN R508-16OZ. The ORP of

the standard solution measured against a silver-silver chloride reference electrode is 476±20mV at 25°C. The redox potential is -476±20mV at 25°C.

10.6.3 Procedure

1. Press MENU. The main menu screen appears. Choose Calibrate.

2. Choose ORP.

3. The top line shows the actual ORP or redox potential (Live). Once the reading is stable, change

the number in the second line to the desired value. Press ENTER.

4. The screen on the left will appear briey.

5. The display returns to the Cal Sensor screen. Press EXIT. Choose the other sensor and repeat

steps 2 through 4.

32 Calibration - pH and ORP

Instruction Manual Maintenance

LIQ_MAN_6081-P February 2014

Section 11: Maintenance

11.1 Overview

This section gives general procedures for routine maintenance of the 6081-P pH/ORP transmitter and pH and ORP sensors. The transmitter needs almost no routine maintenance. Sensors require periodic inspection and cleaning. The calibration of the transmitter-sensor combination should

be checked regularly, and the loop recalibrated if necessary.

11.2 Transmitter Maintenance

Periodically clean the transmitter window and housing as needed with a cloth dampened with

water. Do not use abrasive cleaning solutions. The O-rings and sealing surfaces must be kept

clean or moisture may enter the electronic enclosure.

11.3 pH Sensor Maintenance

11.3.1 Frequency of Cleaning

The frequency at which a sensor should be inspected and cleaned can be determined only by

experience. If the process liquid coats or fouls the sensor, frequent cleaning may be necessary. If

the process does not contain a high level of suspended solids, the need for regular cleaning will be less. Often an increase in glass impedance indicates the electrode is becoming fouled and needs cleaning. Refer to Section 12.4 for a description of the glass impedance diagnostic.

11.3.2 Cleaning Procedures

Problem Cleaning Suggestions

Loose scale or debris Use a stream of water from a wash bottle to rinse away solids

from the tip of the sensor. If water does not work, gently wipe

the glass bulb and liquid junction with a soft cloth, tissue, cotton-tipped swab, or a soft bristle brush.

Oil and grease Wash the glass bulb with mild detergent solution and rinse thor-

oughly with water.

Hard scale (carbonate sulfate scales and corrosion products)

When using acid or alkaline solvents, be careful to keep the solvent away from the liquid junction. If the cleaning solvent contacts the junction, hydrogen ions (acid solvent) or hydroxide ions (alkaline solvent) will diffuse into the junction. Because hydrogen and hydroxide ions have much

greater mobility than other ions, they produce a large junction potential. When the electrode

goes back in service, the hydrogen or hydroxide ions slowly diffuse out of the junction, causing the liquid junction potential and the pH reading to drift. It may take hours or days for the reading to stabilize. For a discussion of the inuence of ion mobility on liquid junction potentials, see Section 13.4.

Consult the sensor instruction manual for additional information. Always recalibrate the sensor after cleaning. If the sensor was cleaned with detergent or acid,

soak the sensor in pH 4 or pH 7 buffer for at least an hour before calibrating.

If wiping the sensor tip with a tissue or cotton swab does not

remove the scale, soak the glass bulb ONLY in a solution of 5%

hydrochloric acid. To prepare the acid solution, add 15 mL of

concentrated hydrochloric acid to 85 mL of water. Keep the

acid away from the liquid junction and from any stainless steel portions of the sensor. Rinse the sensor thoroughly with deion-

ized water. Some scales (for example, calcium sulfate) cannot be removed easily with acid. Soaking the glass bulb in a 2% solution of disodium EDTA may be helpful.

11.3.3 Checking the Reference Electrode.

Some processes contain substances, for example, suldes, that poison the reference electrode.

Maintenance 33

Maintenance Instruction Manual

February 2014 LIQ_MAN_6081-P

Poisoning alters the electrode potential. For example, sulde poisoning converts the reference electrode from a silver/silver chloride electrode into a silver/silver sulde electrode, causing a shift in potential of several hundred millivolts. A good way to check for poisoning is to compare the voltage of the reference electrode with a silver/silver chloride electrode that is known to be good. The reference electrode from a new sensor is the best choice. To check the suspect electrode, place both sensors in a beaker containing buffer or a solution of potassium chloride. Connect

the reference leads to a voltmeter and measure the potential difference. If the suspect electrode

is good, the difference should be no more than about 20 mV. Refer to Figure 11-1. A poisoned

reference electrode usually requires replacement.

Figure 11-1. Checking the Potential of the Reference Electrode

Refer to the wiring diagram(s) for the sensors to identify the reference leads.

A laboratory silver/silver chloride reference electrode can be used in place of the second sensor. All Rosemount Analytical pH sensors have a silver/silver chloride reference, and most sensors

use gelled saturated potassium chloride for the ll. The potentials of a good sensor reference

electrode and a saturated silver/silver chloride laboratory electrode will agree within about 20

mV.

11.3.4 Rejuvenating Reference Electrodes

Occasionally, a poisoned or plugged reference electrode can be reconditioned. Although the

electrode seldom recovers completely, the procedure might extend the life of the sensor by a few weeks.

1. Clean the sensor as thoroughly as possible.

2. Soak the sensor for several hours in a hot (NOT BOILING) 3% potassium chloride solution.

Prepare the solution by dissolving 3 g of potassium chloride in 100 mL of water.

3. Soak the sensor in pH 4 buffer at room temperature overnight.

4. Calibrate the sensor in buffers and retest it in the process liquid.

11.4 ORP Sensor Maintenance

11.4.1 Frequency of Cleaning

The frequency at which an ORP sensor should be inspected and cleaned can be determined only

by experience. If the process liquid coats or fouls the sensor, frequent cleaning may be necessary.

If the process does not contain a high level of suspended solids, the need for regular cleaning will be less.

11.4.2 Cleaning Procedures

The platinum electrode is easily cleaned by using a tissue to rub the metal surface with a paste of

34 Maintenance

Instruction Manual Maintenance

LIQ_MAN_6081-P February 2014

baking soda (sodium bicarbonate). A clean platinum electrode is bright and shiny.

11.4.3 Checking the Reference Electrode

ORP electrodes manufactured by Rosemount Analytical have a silver/silver chloride reference.

Section 12.3.3 describes how to check the performance of the reference electrode.

11.5 Calibration

11.5.1 General

Many users regard calibration as a routine part of sensor/transmitter maintenance. Procedures for calibrating pH sensors, ORP sensors, and general information regarding the use of pH calibration buffers and ORP standards are given in Sections 10.0 Calibration of pH and ORP Measurements.

11.5.2 Calibration Frequency

The frequency at which sensors should be calibrated can be determined only by experience. Many factors inuence calibration frequency. Sensors installed in dirty or corrosive process streams

usually require more frequent calibration than sensors used in clean water. Sensors measuring

extreme pH values, particularly high pH, also require more frequent calibration than sensors

measuring mid-range pH. The width of the pH or ORP control range and the consequences of an

out-of-limits condition has a major inuence on calibration frequency. The narrower the control range and the greater the sensitivity of the process to control excursions, the more often the sensor should be checked. Finally, if monitoring data are reported to regulatory agencies, the

agency itself may dictate the calibration frequency. Use the following procedure to determine how often a pH sensor should be calibrated.

1. Calibrate the sensor. Record the date of calibration and the sensor response in buffers. That

is, after calibrating, place the sensor back in the buffers and record the pH and temperature

reading in each buffer. Also note the value of the reference offset and slope.

2. Install the sensor in the process stream.

3. After the appropriate period—two weeks for a clean process, several days for a dirty or

aggressive process— remove the sensor and check its performance in buffers. Record the pH

and temperature readings. The performance of the sensor in buffer after it has been in service

is called the as-found condition. Keeping a good record of as-found data is an important step in

determining the calibration frequency.

4. If the as-found data are acceptable, do not recalibrate the sensor. Return it to the process.

Continue checking the calibration at the same interval.

5. If the as-found data are not acceptable, recalibrate the sensor. After calibration, check the

sensor response in each buffer and record the results. Also note the reference offset and the

slope. Return the sensor to service. Check the sensor again after a period shorter than the one originally selected. For example, if the rst interval was two weeks, repeat the check after one week.

6. After a while it will become apparent how long the sensor holds calibration. The minimum

calibration frequency can then be determined.

7. Check the calibration of the sensor at least several times during the regular calibration interval.

Interim checks verify the sensor is still in calibration and validate the process measurements made since the last calibration or calibration check.

11.6 Power Module Replacement

Expected power module (PN 701PBKKF or PN 00753-9220-0001) life is four years at reference conditions. This section describes the procedure for replacement of power module (PN 701PBKKF or PN 00753-9220-0001). The new power module should stored in a safe place with a controlled

environment until the Model 6081 is ready for live operation. For replacement of the power module, follow these steps:

1. Unscrew the two long machine screws to remove the rear cover of the Model 6081. Separate

the rear cover from the central housing by manually prying the sections apart. Do not use screwdrivers or tools to separate these housing parts. The parts are sealed with an o-ring.

Maintenance 35

Maintenance Instruction Manual

February 2014 LIQ_MAN_6081-P

2. Before installation, note the safety warning, disposal instructions and part information on the

connectionside label of the power module.

3. With the Model 6081 front display section facing away from you, align the power module pack

with the curved surface of the pack facing towards you and the small protruding connector facing away from you. Make sure to align the power module and its keyed connector with the connection receptacle in the middle of the instrument’s terminal block area.

4. With gentle pressure, insert the keyed connector on the power module into the receptacle

(labeled Power Module Connection on the drawing). The power module seats in the connection receptacle with an o-ring.

5. Conrm that the power module is fully inserted in the receptacle and properly aligned with the

surrounding terminal block.

6. Replace the rear cover of the Model 6081 with the two screws to secure it to the central

housing. Tighten screws and verify operation. Correct installation the rear cover will ensure that the power module is properly secured to power the transmitter.

7. DO NOT RETURN SHIP THE USED POWER MODULE to Rosemount Analytical. Dispose of spent

power modules as a hazardous material in accordance with government regulations.

NOTE

A damaged or degraded o-ring may compromise the NEMA 4X rating of the unit even when the rear cover is correctly installed. Please take care to protect the o-ring when removing and replacing the rear cover of

the transmitter.

11.6.1 Handling Considerations

The power module with the wireless unit contains 2 “C” size primary lithium/thionyl chloride

batteries. Each power module contains approximately 2.5 grams of lithium, for a total of 5 grams in each pack. Under normal conditions, the power module materials are self-contained and are

not reactive as long as the batteries and the power module integrity are maintained. Care should

be taken to prevent thermal, electrical or mechanical damage. Contacts should be protected to

prevent premature discharge. Use caution when handling the power module. The power module

may be damaged if dropped from heights in excess of 20 feet. Power module hazards remain

when cells are discharged.

11.6.2 Environmental Considerations

As with any battery, local environmental rules and regulations should be consulted for proper

management of spent batteries. If no specic requirements exist, recycling through a qualied recycler is encouraged. Consult the materials safety data sheet for power module specic

information.

11.6.3 Shipping Considerations

The unit is shipped to you without the power module installed. Unless specically instructed

to do otherwise, remover the power module from the unit prior to shipping. Primary lithium batteries are regulated in transportation by the U.S. Department of Transportation, and are also covered by International Air Transport Association (IATA), International Civil Aviation Organization

(ICAO), and European Ground Transportation of Dangerous Goods (ARD). It is the responsibility

of the shipper to ensure compliance with these or any other local requirements. Please consult current regulations and requirements before shipping.

36 Maintenance

Instruction Manual Return of Material

LIQ_MAN_6081-P February 2014

Section 12: Return of Material

12.1 General

To expedite the repair and return of instruments, proper communication between the customer and the factory is important. Call 1-949-757-8500 or 1-800-854-8257 for a Return Materials

Authorization (RMA) number.

12.2 Warranty Repair

The following is the procedure for returning instruments still under warranty:

1. Call Rosemount Analytical for authorization.

2. To verify warranty, supply the factory sales order number or the original purchase order

number. In the case of individual parts or sub-assemblies, the serial number on the unit must be supplied.

3. Carefully package the materials and enclose your “Letter of Transmittal” (see Warranty). If

possible, pack the materials in the same manner as they were received.

4. Send the package prepaid to:

Emerson Process Management

Liquid Division

2400 Barranca Parkway Irvine, CA 92606

Attn: Factory Repair RMA No. ____________

Mark the package: Returned for Repair

Model No. ___

12.3 Non-Warranty Repair

The following is the procedure for returning for repair instruments that are no longer under warranty:

1. Call Rosemount Analytical for authorization.

2. Supply the purchase order number, and make sure to provide the name and telephone number

of the individual to be contacted should additional information be needed.

NOTE

Prior to return shipping Model 6081, remove the power module and replace the transmitter rear cover.

DO NOT RETURN SHIP THE POWER MODULE to Rosemount Analytical. Keep them for proper disposal as a

hazardous material.

NOTE

Consult the factory for additional information regarding service or repair.

Return of Material 37

Return of Material Instruction Manual

February 2014 LIQ_MAN_6081-P

This page left blank intentionally

38 Return of Material

WARRANTY

Goods and part(s) (excluding consumables) manufactured by Seller are warranted to be free from defects in workmanship and material under normal use and service for a period of twelve (12) months from the date of shipment by Seller. Consumables, pH electrodes, membranes, liquid junctions, electrolyte, O-rings, etc. are warranted to be free from defects in workmanship and material under normal use and service for a period of ninety (90) days from date of shipment by Seller. Goods, part(s) and consumables proven by Seller to be defective in workmanship and / or material shall be replaced or repaired, free of charge, F.O.B. Seller’s factory provided that the goods, parts(s), or consumables are returned to Seller’s designated factory, transportation charges prepaid, within the twelve (12) month period of warranty in the case of goods and part(s), and in the case of consumables, within the ninety (90) day period of warranty. This warranty shall be in effect for replacement or repaired goods, part(s) and consumables for the remaining portion of the period of the twelve (12) month warranty in the case of goods and part(s) and the remaining portion of the ninety (90) day warranty in the case of consumables. A defect in goods, part(s) and consumables of the commercial unit shall not operate to condemn such commercial unit when such goods, parts(s) or consumables are capable of being renewed, repaired or replaced.

The Seller shall not be liable to the Buyer, or to any other person, for the loss or damage, directly or indirectly, arising from the use of the equipment or goods, from breach of any warranty or from any other cause. All other warranties, expressed or implied are hereby excluded.

IN CONSIDERATION OF THE STATED PURCHASE PRICE OF THE GOODS, SELLER GRANTS ONLY THE ABOVE STATED EXPRESS WARRANTY. NO OTHER WARRANTIES ARE GRANTED INCLUDING, BUT NOT LIMITED TO, EXPRESS AND IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

RETURN OF MATERIAL

Material returned for repair, whether in or out of warranty, should be shipped prepaid to:

Emerson Process Management

Liquid Division

2400 Barranca Parkway

Irvine, CA 92606

The shipping container should be marked:

Return for Repair Model

_______________________________

The returned material should be accompanied by a letter of transmittal which should include the following information (make a copy of the “Return of Materials Request” found on the last page of the Manual and provide the following thereon):

1. Location type of service, and length of time of service of the device.

2. Description of the faulty operation of the device and the circumstances of the failure.

3. Name and telephone number of the person to contact if there are questions about the returned material.

4. Statement as to whether warranty or non-warranty service is requested.

5. Complete shipping instructions for return of the material.

Adherence to these procedures will expedite handling of the returned material and will prevent unnecessary additional charges for inspection and testing to determine the problem with the device.

If the material is returned for out-of-warranty repairs, a purchase order for repairs should be enclosed.

LIQ_MAN_ABR_6081-P

Rev. B

February 2014

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2400 Barranca Parkway Irvine, CA 92606 USA Tel: (949) 757-8500 Fax: (949) 474-7250

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The Emerson logo is a trademark and service mark of Emerson Electric Co. Brand name is a mark of one of the Emerson Process Management family of companies. All other marks are the property of their

respective owners.

The contents of this publication are presented for information purposes only, and while effort has been

made to ensure their accuracy, they are not to be construed as warranties or guarantees, express or

implied, regarding the products or services described herein or their use or applicability. All sales are governed by our terms and conditions, which are available on request. We reserve the right to modify

or improve the designs or specications of our products at any time without notice.

Rosemount 6081-P Wireless pH/ORP Transmitter Manuals & Guides

Specifications and Main Features

Frequently Asked Questions

User Manual