Rosemount 4081 Toroidal Conductivity Transmitter Manuals & Guides

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Model 4081 T

Remote Controlled FOUNDATION



Fieldbus

Two-Wire

Conductivity Transmitter

Instruction Manual

PN 51-4081T/rev.D April 2003

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 specifications. 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 1-800-6547768 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 clarification.

• 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 specified 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 qualified personnel to install, operate, update, program, and maintain the product.

• When replacement parts are required, ensure that qualified people use replacement parts specified 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 fire, 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 qualified persons, to prevent electrical shock and personal injury.

Emerson Process Management

Rosemount Analytical Inc.

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

http://www.RAuniloc.com

TABLE OF CONTENTS

Section Title Page

1.0 INSTALLATION ................................................................................................................. 1-1

1.1 Overview .................................................................................................................. 1-1

1.2 Mechanical Installation............................................................................................. 1-2

1.3 Electrical Installation ................................................................................................ 1-4

1.4 Installation Verification ............................................................................................. 1-4

2.0 OPERATION OVERVIEW ................................................................................................. 2-1

2.1 General .................................................................................................................... 2-1

2.2 Display ..................................................................................................................... 2-1

2.3 Infrared Remote Control (IRC)................................................................................. 2-2

2.4 Diagnostic Messages............................................................................................... 2-2

2.5 Menu Program Tree................................................................................................. 2-3

3.0 FACTORY PROGRAMMED SETTINGS........................................................................... 3-1

3.1 General .................................................................................................................... 3-1

4.0 TRANSMITTER PROGRAM SET-UP ............................................................................... 4-1

4.1 Program Menu ......................................................................................................... 4-1

4.2 Temperature Parameters ......................................................................................... 4-2

4.3 Display Units ............................................................................................................ 4-3

5.0 START-UP AND CALIBRATION....................................................................................... 5-1

5.1 Accessing The Calibrate Menu ................................................................................ 5-1

5.2 Calibrate Menu (Toroidal)......................................................................................... 5-2

5.3 Calibrate Menu (% Concentration)........................................................................... 5-3

5.4 On-line Calibration ................................................................................................... 5-4

6.0 DIAGNOSIS AND TROUBLESHOOTING ........................................................................ 6-1

6.1 Overview .................................................................................................................. 6-1

6.2 Fault Conditions ....................................................................................................... 6-3

6.3 Diagnostic Messages............................................................................................... 6-4

6.4 Quick Troubleshooting Guide................................................................................... 6-5

6.5 Systematic Troubleshooting..................................................................................... 6-6

6.6 RTD Resistance Values ........................................................................................... 6-7

7.0 MAINTENANCE ................................................................................................................ 7-1

7.1 Overview .................................................................................................................. 7-1

7.2 Preventative Maintenance ....................................................................................... 7-1

7.3 Corrective Maintenance ........................................................................................... 7-1

8.0 PRODUCT DATA............................................................................................................... 8-1

9.0 OPERATION WITH REMOTE CONTROLLER ................................................................. 9-1

10.0 RETURN OF MATERIALS ................................................................................................ 10-1

Appendix Title Page

A GLOSSARY....................................................................................................................... A-1

B 4081T RESOURCE AND TRANSDUCER BLOCK PARAMETERS ................................ B-1

MODELS 4081T TABLE OF CONTENTS

MODEL 4081T

MICROPROCESSOR ANALYZERS

LIST OF FIGURES

Figure No. Title Page

1-1 Exploded Drawing of Circuit Board Stack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1-2 Dimensional Information - Model 4081T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

1-3 Mounting Information - Model 4081T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

1-4 Function Wiring Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

1-5 Model 4081T Wiring Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

1-6 Model 4081T Wiring with Junction Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

1-7 Model 4081T Terminal Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

1-8 Typical Fieldbus Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

1-9 Wiring For Explosion Proof Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

1-10 Wiring For CSA Intrinsically Safe Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

1-11 Wiring For FMRC Intrinsically Safe Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

2-1 Process Display Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2-2 Program Mode Display Areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2-3 Infrared Remote Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2-4 Menu Tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

4-1 Program Menu and Menu Segments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4-2 RTD Sensor Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

4-3 Security Code Prompt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

5-1 Calibration Menu Segments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5-2 Calibration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

6-1 Diagnose Menu Segments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6-2 Diagnose Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

6-3 Disabling Fault Annunciation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

6-4 Warning Annunciation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

6-5 Troubleshooting Flow Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

7-1 Hold Annunciation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

7-2 Exploded View - 4081T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

8-1 Transmitter Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3

8-2 Infrared Remote Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3

8-3 Function Block Diagram with F

OUNDATION

Fieldbus . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3

9-1 Function Block Diagram with F

OUNDATION Fieldbus . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

LIST OF TABLES

Table No. Title Page

1-1 Hardware/Software Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

1-2 Transmitter Range Limits (Conductivity) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

1-3 Transmitter Range Limits (Concentration) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

3-1 Program Variables with Factory Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

4-1 Program Menu Mnemonics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

5-1 Nominal Cell Constants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

5-2 Calibrate Menu Mnemonics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

6-1 Diagnostics Variables Mnemonics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

6-2 Diagnostic Fault Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

6-3 Quick Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5

6-4 RTD Resistance Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

6-5 Conductivity Determination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

7-1 4081 T Replacement Parts and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

MODELS 4081T TABLE OF CONTENTS

MODELS 4081T SECTION 1.0

INSTALLATION

SECTION 1.0

INSTALLATION

FIGURE 1-1. Model 4081T Transmitter - Exploded Drawing of Circuit Board Stack

1.1 OVERVIEW

This inductive conductivity transmitter has been designed for easy installation and shipment. The purpose of this section is to provide information on the electrical configurations and the physical mountings available. Prior to discarding the packing case:

If it is damaged, the transmitter may have also sustained damage. Contact the carrier at once.

Remove all items shown on the packing list and note any exceptions.

1-1

The Model 4081T conductivity transmitter is designed to make accurate measurements while the sensor is submersed in the process stream. Measurements can also be tailored to high temperature and/or high pressure streams. The specific ranges covered are controlled by both hardware and software.

1-2

FIGURE 1-2. Dimensional Information – Model 4081 T

DWG. NO. REV.

44081C01 A

MILLIMETER

INCH

MODELS 4081T SECTION 1.0

INSTALLATION

1.2 MECHANICAL INSTALLATION

The Model 4081 T Transmitter is suitable for installation in harsh environments.

• For best operation, locate in an area where temperature extremes, vibrations, electromagnetic, and radio frequency interferences are minimized or absent.

The transmitter is equipped with two 3/4 in. FNPT conduit openings, one on each side of the transmitter housing.

• Remove the terminal end cap.

• With the transmitter positioned with the wiring terminal side of the enclosure opened (as seen in Figure 1-2), use the left conduit opening to bring in the sensor wiring, and the right side conduit opening for power supply/current loop wiring.

• To prevent moisture from entering the transmitter housing, use weathertight cable glands supplied by others.

NOTE

Moisture accumulation in the transmitter housing can affect transmitter performance and may void its warranty.

• If conduit is used, connections on the transmitter housing should be plugged and sealed (with tape, pipe compound, or sealant) to prevent moisture accumulation in the terminal side of the housing.

• The transmitter must be installed so that the conduit openings are not on the top, because moisture can accumulate in that position.

• The transmitter should be easily accessed by operating and maintenance personnel.

1.2.1 Flat Surface Mounting. The transmitter may be mounted on a flat surface (see Figure 1-2) using the threaded mounting holes on the bottom of the transmitter.

1.2.2 Pipe Mounting Bracket. An optional pipe mounting bracket is available. See Figure 1-3 for mounting information.

1-3

MODELS 4081T SECTION 1.0

INSTALLATION

FIGURE 1-3. Mounting Information - Model 4081 T

DWG. NO. REV.

40408103 B

DWG. NO. REV.

40408104 F

MILLIMETER

INCH

1-4

MODELS 4081T SECTION 1.0

INSTALLATION

1.3 ELECTRICAL INSTALLATION

1.3.1 Conductivity Sensors

Rosemount Analytical Inc.’s inductive conductivity sensors with PT100 are compatible with the Model 4081T transmitter. Please refer to Figures 1-4 thru 1-6 for appropriate sensor to transmitter wiring. The sensor cable should be routed through the conduit opening closest to the Pin 2 connection.

1.3.2 Power Supply/Current Loop Wiring.

The Model 4081T operates within a range of 9-32 VDC power. The power supply wiring routes through the conduit opening closest to pin number 16. Connect as illustrated in Figure 1-7. For shielded power supply cable, the shield should be connected to the earth ground connection.

The Model 4081T sensor connection requires connecting the white toroid wire (see Figure 1-5) to either TB-1 pin 11 (indicated on the inside of the terminal end cap) for high range, or TB-1 pin 12 for low range. To access the terminal block, unscrew the terminal end cap.

1.3.3 Hazardous Area Installation

In order to maintain the hazardous area rating for installed transmitter, the following drawings must be used:

Figure 1-9. Wiring for FM Explosion-Proof Installation for Model 4081T (Drawing Number 1400175)

Figure 1-10. Wiring for CSA Intrinsic Safety for Model 4081T (Drawing Number 1400190). See also label (right).

Figure 1-11. Wiring for FMRC Intrinsic Safety for Model 4081T (Drawing Number 1400185).

1.4 INSTALLATION VERIFICATION

1.4.1 Overview. Verification of installation includes ensur-

ing that the proper precautions have been observed during the installation process and recognizing whether the instrument is operating properly upon power up.

1.4.2 Precautionary Checklist. Before applying power verify the following:

1. Sensor wiring and power supply/loop wiring are not in the same conduit.

2. Sensor or power supply/loop wiring are at least 12 inches from any high current lines.

3. Sensor chosen is compatible with the 4081T Transmitter.

4. Terminal end cap has been replaced.

1.4.3 Power Up. Activate power supply. Upon powering

up, with the sensor in solution, the transmitter:

1. Should display a live conductivity reading in large, dark numerals on a gray background.

2. Should display the present temperature in smaller numerals on the lower line of the display screen.

3. Should NOT have the word FAULT or HOLD appearing on the left edge of the display. The display should not be flashing.

TABLE 1-1. Hardware/Software Compatibility

(Measurement Range [µS/cm]*)

MANUAL RANGE 1 2 3

Low Range 80 to 800 to 7,500 to

(accuracy: ± 1.0%) 800 7,500 80,000

High Range 1,100 to 11,000 to 100,000 to

(accuracy: ± 1.0%) 11,000 100,000 1,100,000

Wire Terminal

or 12

*NOTE: Values shown are for uncompensated conductivity using

a cell constant of 1.0. The conductivity values auto ranges from 0 to 2,000,000

µS/cm with an accuracy of

5 to 10%

±150 µS/cm depending on the process con-

ditions, installation, and the sensor used. For greater accuracy and repeatability, manual range selection is recommended.

LABEL, I.S. N.I. & EX CSA approved for Model 4081T

MODELS 4081T SECTION 1.0

INSTALLATION

TABLE 1-2. Transmitter Range Limits (Conductivity)

TABLE 1-3. Transmitter Range Limits (Concentration)

PV_HIGH_LOW_RANGE MANUAL_AUTO_RANGE RANGE_VALUE CELL_CONSTANT (0% FS) (100% FS)

Manrng

(1/cm) EU0% µµS/cm EU100% µµS/cm

Low Auto N/A N/A 0 400,000

High Auto N/A N/A 0 1,200,000

Low Manual 1 1.0 0 800

Low Manual 1 3.0 0 2,400

Low Manual 2 1.0 0 8,000

Low Manual 2 3.0 0 24,000

Low Manual 3 1.0 0 80,000

Low Manual 3 3.0 0 240,000

Low Manual 4 1.0 0 400,000

Low Manual 4 3.0 0 1,200,000

High Manual 1 1.0 0 11,000

High Manual 1 3.0 0 33,000

High Manual 2 1.0 0 110,000

High Manual 2 3.0 0 330,000

High Manual 3 1.0 0 1,200,000

High Manual 3 3.0 0 3,600,000

PV_HIGH_LOW_RANGE (0% FS) (100% FS)

EU0% µµS/cm EU100% µµS/cm

NaOH 0% 12.00%

HCl 0% 15.00%

low H2SO

0% 25.00%

high H2SO

96.00% 99.00%

1-5

1-6

MODELS 4081T SECTION 1.0

INSTALLATION

FIGURE 1-4. Wiring Schematic Showing Signal Function On Each Connection

MILLIMETER

INCH

1-7

MODELS 4081T SECTION 1.0

INSTALLATION

FIGURE 1-5. Model 4081T Sensor Wiring Schematic by Sensor Model

MILLIMETER

INCH

1-8

FIGURE 1-6. Model 4081T Sensor Wiring with Junction Box

MODELS 4081T SECTION 1.0

INSTALLATION

MILLIMETER

INCH

1-9

MODELS 4081T SECTION 1.0

INSTALLATION

FIGURE 1-7. MODEL 4081T TERMINAL BLOCKS

FIGURE 1-8. TYPICAL FIELDBUS NETWORK ELECTRICAL WIRING CONFIGURATION

MODELS 4081T SECTION 1.0

INSTALLATION

FIGURE 1-9. EXPLOSION-PROOF INSTALLATION

1-10

MODELS 4081T SECTION 1.0

INSTALLATION

FIGURE 1-10. CSA INTRINSICALLY SAFE INSTALLATION (1 of 2)

1-11

MODELS 4081T SECTION 1.0

INSTALLATION

FIGURE 1-10. CSA INTRINSICALLY SAFE INSTALLATION (2 of 2)

1-12

MODELS 4081T SECTION 1.0

INSTALLATION

FIGURE 1-11. FMRC INTRINSICALLY SAFE INSTALLATION (1 of 2)

1-13

1-14

MODELS 4081T SECTION 1.0

INSTALLATION

FIGURE 1-11. FMRC INTRINSICALLY SAFE INSTALLATION (2 of 2)

2-1

2.1 GENERAL

The Model 4081T transmitter operates in either the Process or Program modes. The process mode screen is illustrated in Figure 2-1 and the program mode screen is illustrated in Figure 2-2.

2.2 DISPLAY

2.2.1 Process Mode (normal operating mode). When

operating in this mode:

• The primary process variable (the conductivity) is continuously displayed (see 1 in Figure 2-1)

• Engineering units are determined by the process display mode

• Temperature output is in °F or °C (see 2 in Figure 2-1)

2.2.2 Program Mode (programming or calibrating mode — step-by-step instructions for programming and calibrating the transmitter are given in Sections

4.0 and 5.0, respectively). When operating in this mode

the following information is provided on the instrument display:

• Continuous display of the primary process variable is still available.

• Menus are displayed below the process variable. The active subset title is in bold print (see 1 in Figure 2-2).

CALIBRATE PROGRAM DIAGNOSE

CALIbrAtE

EXIT NEXT ENTER

1000

mS/cm

F A U L T

H O L D

MODELS 4081T SECTION 2.0

OPERATION OVERVIEW

SECTION 2.0

OPERATION OVERVIEW

FIGURE 2-1. Process Display Screen

11000000

mS/cm

25.0C

FIGURE 2-2. Program Mode Display Areas

• Security ID (see Section 4.4, step 10) and prompts are displayed below the segments (see 2 and 3 in Figure 2-2).

• FAULT is displayed (see 4 in Figure 2-2) when a transmitter disabling condition occurs. When in the fault mode, the fault indicator lights up and the process variable flashes. The program mode must be entered to see the descriptive fault message.

• HOLD (see 5 in Figure 2-2) becomes visible when- ever the transmitter is placed in the hold or test function. Hold is most often used when servicing/cleaning the sensor. It initiates the simulate mode.

2-2

2.3 INFRARED REMOTE CONTROL (IRC)

The IRC is the most convenient way to calibrate, program, or access the diagnostics in the transmitter. It operates the same as other remote controllers.

For best operation, the IRC should be within six feet of the transmitter and aimed directly at the infrared sensor window (small square window at top of display) at an angle of no more than fifteen degrees. The amount of ambient light may also affect IRC communication.

2.3.1. The overall menu structure is shown in Figure 2-4. The top level functions available to the IRC (CAL, PROG, and DIAG) are shown on the display with the active menu segment highlighted as described in Section 2.2.

2.3.2. Menu Keys. The three primary menu structures are Calibrate (CAL), Program (PROG), and Diagnose (DIAG). They are shown horizontally on the screen and have separate keys on the IRC (see 1, 2, and 3 in Figure 2-3). Pressing the labeled key will provide access to that menu.

2.3.3. Program Command Keys. The three program command keys are labeled ENTER, NEXT, and EXIT (see 4, 5, and 6 in Figure 2-3). These keys are used as follows:

ENTER: This advances down through the submenus to the prompts, will save the new value, and activate NEXT.

NEXT: This advances the program to the next sub-menu.

EXIT: This key is used to abort the current submenu operation and return to the previous menu segment.

2.3.4. Editing Keys. These keys are used to edit input variables (see Figure 2-3). The left/right arrows change the location of the prompt and causes the integer to flash. These also allow access to the measurement unit and decimal place location. When a flashing mnemonic appears on the display, the UP and DOWN arrow keys scroll up or down through the list. When numbers are shown, the UP and DOWN keys change the value of the digit.

MODELS 4081T SECTION 2.0

OPERATION OVERVIEW

Editing keys

FIGURE 2-3. Infrared Remote Control

2.3.5. Special Entry Keys. These keys provide system

level operations.

RESET: Aborts the current operation and returns to the process display screen (see 8 in Figure 2-3).

HOLD: Accesses prompt to toggle between enable and disabling of this function (see 9 in Figure 2-3).

2.4 DIAGNOSTIC MESSAGES

Whenever a warning or fault has been triggered, diagnostic messages are displayed to aid in problem solving. These messages flash alternately with the temperature reading.

If more than one message has been generated, the warning or fault messages will alternate with the regular readings.

See Section 6.0 Diagnosis and Troubleshooting for message meaning and possible causes.

2-3

MODELS 4081T SECTION 2.0

OPERATION OVERVIEW

CALIBRATION

AdJ SLOPEtEMP SLOPE

AbS C

CELL 0

FActor

UEr 81T 10

tSLOPE

Shouu FLt

1000

25.0C

Model 4081T

Process Display

Screen

mS/cm

CALIbrAtE

CELL COnSt SEnSOr 0

tEMP AdJ

tEMP

dISPLAY

PROGRAM

Process Display

FIGURE 2-4. Menu Tree

DIAGNOSTICS

2.5 MENU PROGRAM TREE

The software has been designed with the user in mind. It uses a simple three layer setup to calibrate and program (configure) the instrument and display instrument diagnostic conditions (see Figure 2-4).

NOTE: In Calibration or Program mode, the Fieldbus parameter — MODE_BLK (INDEX 405) — of the Transducer Block switches to the out-of-service mode.

2-4

3-1

MODELS 4081T SECTION 3.0

FACTORY PROGRAMMED SETTINGS

SECTION 3.0

FACTORY PROGRAMMED SETTINGS

3.1 GENERAL

The Models 4081 T transmitter is shipped with factory programmed settings.

This table is useful in several ways:

1. It gives an overview of variables that can be changed, the mnemonics, and the factory settings.

2. It identifies more detailed sections for each menu.

3. It shows the factory settings.

4. It provides space to input specific values.

VARIABLE NAME MNEMONIC FACTORY SETTINGS CUSTOMER SETTINGS

Temperature (Section 4.2)

ttEEMMPP

Auto temperature compensation tAUtO on

Manual temperature tMAn 25.0° C (overridden by auto)

Temperature sensor type tC 100-3

Display (Section 4.3)

ddIISSPPLLAAYY

Measurement type t, NOH, HCL, HSO, HSH t

Range rAnGE Hi

Auto range Autorng on

Manual range Manrng 1, 2, 3, 4 (selectable only with

Autorng “off”) or see Table 4-1

Temperature tEMP C

Code COdE 000

Table 3-1. Program Variables with Factory Settings*

Table 3-1 continues on page 3-2.

*Press ENTER after each command to get entry field.

3-2

MODELS 4081T SECTION 3.0

START-UP AND CALIBRATION

Table 3-1 (continued) Calibrate Menu (Section 5.0)/Diagnose Menu (Section 6.0)

VARIABLE NAME MNEMONIC FACTORY SETTINGS CUSTOMER SETTINGS

Calibrate (Section 5.0)

Cell constant CELL Const (sensor specific)

Sensor 0 Sensor O 0

Temperature setting Temp Adj 025.0

Temperature slope (Two Point temperature) temp slope t1 =

t2 =

Temperature slope (if already known) adj slope 2.000

Diagnose (Section 6.1)

(Each segment displays the current value in the transmitter.)

Absolute conductivity Abs C 1000 µS/cm

Cell constant cell 1.00

Temperature slope tslope 2.000

Software version

Show fault warnings Showj Flt (enter) none

NOTE: Software version is on the serial tag and should match what is in the diagnose segment.

4-1

4.1 PROGRAM MENU

The program menu allows configuration of the transmitter values for the display shown on the LCD.

Changes to the operating parameters are made through the Program menu.

Press the Program menu key, while pointing the Infrared Remote Control (IRC) at the transmitter to initiate communication. To avoid communicating with more than one transmitter at a time, each one must have a unique 3 digit code. Entering the “Id” CODE (see Section 4.3, step 9) of a transmitter will permit access to programming menus of only that transmitter. For the sequence to enter this code, press the PROG key and go to the last (display) element of the sub-menu.

MODELS 4081T SECTION 4.0

TRANSMITTER PROGRAM SET-UP

SECTION 4.0

PROGRAM SET-UP

Calibrate Menu

Segments/Commands

Program Menu

Segments/Commands

DIAGNOSE MENU

Segments/Commands

CURRENT OPERATING MENU

FACtOr

EXIT NEXT ENTER

CELL

EXIT NEXT ENTER

AbSC

EXIT NEXT ENTER

FIGURE 4-1. Program Menu and Menu Segments

SEnSOr

EXIT NEXT ENTER

CALIbrAtE

EXIT NEXT ENTER

CELL COnSt

EXIT NEXT ENTER

tSLOPE EXIT

NEXT ENTER

UEr 81t 10

EXIT NEXT ENTER

KEYPRESS COMMANDS

CalibrateProgram Diagnose

IIdd 000000

Exit Enter

Menu Segment/Prompt

Area

The sub-menus are shown in the message display area. These define which prompts are shown (See Figure 2-

2). The prompts have fields that are used to edit the parameters of the menu currently active. Editing is accomplished by scrolling through a predetermined list of responses. See Figure 4-1 for the sub-menus available under the program menu.

See Table 4-1 for Program Menu sequence/commands and mnemonics.

dISPLAY

EXIT NEXT ENTER

tEMP

EXIT NEXT ENTER

AdJ SLOPE

EXIT NEXT ENTER

P AdJ

EXIT NEXT ENTER

tEMP SLOPE

EXIT NEXT ENTER

ShoWjFLt

EXIT NEXT ENTER

4-2

MODELS 4081T SECTION 4.0

TRANSMITTER PROGRAM SET-UP

4.2 TEMPERATURE PARAMETERS

1. Press the Program key (PROG) on the IRC, enter the security code if necessary, and press NEXT.

While tEMP is displayed, press ENTER to get the first prompt of the tEMP menu segment.

2. The tAUtO prompt is used to enable (ON) or disable (OFF) auto temperature compensation for all conductivity process measurements. If On is selected, an equation is used to temperature compensate all process measurements to 25 °C and will be the reported temperature on the process display. The default value is On. Press ENTER.

3. The tMAn prompt is used to enter a temperature value that the com- pensation equation will use (overrides auto). The actual process temperature, however, will be shown on the main screen. The temperature display mode determines the units used. Absolute conductivity is measured using the default value of 025.0 °C. Use the IRC editing keys to change the value only if some determination other than absolute conductivity is required. Press ENTER.

4. The tC prompt matches the instrument to the type of temperature sensor being used. Listed type available is 100-3 (3-wire Pt100 RTD). The IRC editing keys scroll through the listing. The default value is 100-3. Press ENTER.

NOTE

4-wire Pt100 is displayed but is not available in toroidal sensors.

5. Press EXIT to return to normal operation or NEXT to go to the display sub-menu.

tEMP

EXIT NEXT ENTER

Return to Main Screen

To display menu segment.

R T D

3 Wire RTD - Connected to an instrument designed to accept three wire input. Compensation is achieved for lead resistance (cable wire resistance is affected by cable length and temperature change). This is the most commonly used configuration.

The following procedures are used to select between automatic temperature compensation, absolute conductivity, manual

temperature compensation, and RTD sensor type. To access the temperature parameters, do the following:

tAUt

O On

EXIT ENTER

C 1 00-3

EXIT ENTER

An 0 25.0

EXIT ENTER

Sense

FIGURE 4-2. RTD Sensor Connections

4-3

MODELS 4081T SECTION 4.0

TRANSMITTER PROGRAM SET-UP

4.3 DISPLAY UNITS

The following procedures are used to select the display menus, calculation formulas, process variable and temperature display units. The factory settings are shown with each variable. To access the display sub-menu, do the following:

EM P

EXIT NEXT ENTER

dISPLAY

EXIT NEXT ENTER

COdE “000”

EXIT ENTER

tYPE “t”

EXIT ENTER

P “C”

EXIT ENTER

Manrng

“1”

EXIT ENTER

Autorng

“On”

EXIT ENTER

rAngE “HI”

EXIT ENTER

1. Press PROG key on remote control.

2. Enter ID Code number (if necessary). See step 9.

Press NEXT twice to scroll through the tEMP menu segment to the dISPLAY menu segment.

3. When the dISPLAY menu is displayed, press ENTER to access the first prompt in the display sequence.

4. The tYPE prompt determines which conductivity measurement with measurement units is to be displayed: "t" = toroidal, “HSH” (95-99% Sulfuric Acid), “HSO” (0-25% Sulfuric Acid),“HCl” (0-15% Hydrochloric Acid), and “NOH” (0-12% Sodium Hydroxide). The IRC editing keys are used to scroll through the list. Other mnemonics will appear, but have been deactivated. Choose the desired one and press ENTER.

5. The rAnGE prompt is used to determine the measurement range limit (High or Low). The IRC editing keys are used to scroll between these. The default is HI. The selection must agree with the terminal connection at pin 11 or 12 (refer to Figures 1-4 through 1-6). Choose between these and press ENTER.

NOTE

This transmitter has the option of auto ranging over the conductivity range of 0 1,200,000 µs/cm or being restricted to the specific manual ranges.

6. The Autorng (auto range) is a toggle (or increment between On and Off) which enables or disables the auto range function. Press the up or down arrow to select On or Off as desired. The On setting turns on the auto range function and preempts Manrng (manual range). Press ENTER.

Continued on the following page.

Return to

Screen

4-4

TABLE 4-1. Program Menu Mnemonics

HoLd

Transmitter on hold

FAULt

System disability fault condition

tEMP

Temperature menu header

tAUtO

Automatic temperature compensation

tMAn

Manual temperature compensation

Temperature sensor type

dISPLAY

Display menu header

tYPE

Conductivity measurement type: t, NOH, HCl, HSO, HSH

rAnGE

LO/HI measurement range

Autorn

Autorange on or off toggle

Manrng

Manual ranges used for narrow, higher linearity Associated with range

When range = Hi, Manrng = 1, 2, 3 When range = Lo, Manrng = 1, 2, 3, 4 (see Table 1-2)

tEMP

°C / °F toggle selection

COdE

Security code

MODELS 4081T SECTION 4.0

TRANSMITTER PROGRAM SET-UP

7. The Manrng (manual range) prompt asks for the fixed range used by the process measurement. Autorng must be Off to enable.

For the “Hi” range setting, Manrng is

Number

1 0 - 11,000 µS/cm 2 0 - 110,000 µS/cm 3 0 - 1,200,000µS/cm 4 N/A

For the “lo” range setting, Manrng is

Number

1 0 - 800 µS/cm 2 0 - 8,000 µS/cm 3 0 - 80,000 µS/cm 4 0 - 400,000 µS/cm

Select the desired range using the up/down arrow keys. Press ENTER.

NOTE

The tables above use absolute conductivity values and a cell constant of 1. Multiply the table values by your sensor’s cell constant to adjust range for your sensor (refer to Table 5-1, page 5-3 for Nominal Cell Constants).

8. The tEMP prompt is used to determine which units will be used with the temperature reading displays. Units available are

C or °F. The IRC editing keys are used to scroll between these. The default value is °C. Choose the appropriate units and press ENTER.

9. The COdE prompt is used to identify the security “Id” Code number of the unit (see Figure 4-3). The number entered here determines the “Id” code number used to unlock the security feature and allow access to the menu programs and program segments. The limits are between 000 and 999. New transmitters are shipped with the code set to 000 which disables the feature, (allows access to all menus). If no key is pressed for two minutes the code will need to be entered again. Use the IRC editing keys to set the desired security code. Press ENTER.

NOTE

If this code has been changed or the number misplaced, entering 555 at the “Id” prompt and pressing ENTER will display the current code. Access will not be granted, however, until you EXIT to the process display, select program to enter (CALIBRATE, PROGRAM, or

DIAGNOSE), press ENTER again, and enter CODE # just displayed.

10. Press EXIT to return to normal operation.

FIGURE 4-3. Security Code prompt.

CALIBRATE PROGRAM DIAGNOSE

IIdd 00 00 00

EXIT NEXT ENTER

5-1

CURRENT OPERATING MENU

KEYPRESS COMMANDS

Menu Segment/Prompt

Area

MODELS 4081T SECTION 5.0

START-UP AND CALIBRATION

5.1 ACCESSING THE CALIBRATE MENU

The “Calibrate” menu allows the transmitter and sensor loop to be calibrated to known temperature and conductivity values. This menu also accesses two-point temperature calibration operation to establish the temperature slope.

Calibrating the Transmitter/Sensor loop may proceed after proper power and sensor wiring.

Figure 5-1 illustrates the relationship between the Calibrate Menu and its sub-menus. Each sub-menu leads to a series of prompts that are used to edit transmitter parameters.

Calibration may be successfully accomplished if the factory settings identified in Table 3-1 of Section 3.0 are satisfactory or if the transmitter has been properly programmed per Section 4.0 to match the intended process application requirements.

Calibrate Menu

Segments/Commands

Program Menu

Segments/Commands

DIAGNOSE MENU

Segments/Commands

fACtOr

EXIT NEXT ENTER

CELL

EXIT NEXT ENTER

AbSC 1000

EXIT NEXT ENTER

FIGURE 5-1. Calibration Menu Segments

SEnSOr O

EXIT NEXT ENTER

CALIbrAtE

EXIT NEXT ENTER

CELL COnSt

EXIT NEXT ENTER

tSLOPE

EXIT NEXT ENTER

UEr 81t 10

EXIT NEXT ENTER

dISPLAY

EXIT NEXT ENTER

tEMP

EXIT NEXT ENTER

AdJ SLOPE

EXIT NEXT ENTER

P AdJ

EXIT NEXT ENTER

tEMP SLOPE

EXIT NEXT ENTER

Sho

FLt

EXIT NEXT ENTER

Calibrate Program Diagnose

IIdd 000000

Exit Enter

SECTION 5.0

START-UP AND CALIBRATION

5-2

MODELS 4081T SECTION 5.0

START-UP AND CALIBRATION

5.2 CALIBRATE MENU (Toroidal Sensors)

For initial start-up where toroidal measurements are being made, do the following:

Figure 5-2 illustrates the relationship between the Calibrate Menu and its menu segments (sub-menus). Each menu segment leads to a series of prompts that are used to edit the transmitter’s parameters.

1. To access the CALIbrAtE menu, press the CAL key on the Infrared Remote Control. If security has been enabled, the secondary process display will be replaced

with a prompt asking for the “Id”. Using the IRC editing keys, enter the “Id”. If the correct “Id” is entered, the CALIbrAtE menu will appear when ENTER is pressed. If CALIbrAtE menu does not appear when ENTER is pressed, see Section 4.3, step 9, for procedure to find correct code.

NOTE

Reset can be pressed at any step to return to the process display and override any value not previously entered.

SEnSOr 0

EXIT NEXT ENTER

CALIbrAtE

EXIT NEXT ENTER

CELL COnSt

EXIT NEXT ENTER

AdJ SLOPE

EXIT NEXT ENTER

tEMP AdJ

EXIT NEXT ENTER

P SLOPE

EXIT NEXT ENTER

Return to Main Screen

SEnSOr 0

EXIT ENTER

rESEtPct 0

EXIT NEXT ENTER

CAL 1000

EXIT ENTER

CELL 1.00

EXIT NEXT ENTER

tSLOPE 2000

EXIT ENTER

tEMP 025.0

EXIT ENTER

t1 2000

EXIT NEXT ENTER

t2 2000

EXIT NEXT ENTER

CAL key

t,%

FIGURE 5-2. Calibrate Menu

5-3

MODELS 4081T SECTION 5.0

START-UP AND CALIBRATION

2. When the CALibrAtE menu segment has been accessed, press the NEXT and ENTER commands to access the CELL menu segment with the flashing cell constant prompt.

3. Utilizing the arrow keys on the IRC, generate the correct cell constant of the sensor being used.

NOTE

Cell constants are sensor dependent. Table 5-1 below lists the nominal cell constants for the four sensors compatible with the Model 4081T.

4. Press ENTER to activate selected cell constant and return to the CELL COnSt menu segment.

5. Press NEXT to enter the SEnSOr 0 menu segment and press ENTER to access the do SEnSOr 0 subsegment. With the attached sensor stabilized in dry air, press ENTER again to zero the sensor.

6. CALibrAtE will show on the display. Press ENTER and CAL will display. Immerse the sensor in a solution of known conductance, and enter the value of the standard. The horizontal arrows will highlight the digit (including µS to mS and decimal positions) to be changed and cause it to blink. The vertical arrows will increase or decrease the currently highlighted (and blinking) digit. The display will change from a random number to the input value. It should be calibrated at middle of the chosen manual range for maximum accuracy.

NOTE

1. If Cal Error shows, reset Cell Const = 1.00

2. This will also change the value shown for the cell constant.

3. DO NOT reenter SEnSOr 0. There is no way out except to set the current read value (0 in air) to zero.

Press ENTER to return to the Calibrate menu.

5.2.1 Temperature Calibration

Press NEXT three (3) times and the tEMP AdJ prompt will be displayed. Press ENTER.

1. With the sensor in a sample solution of known temperature, allow the temperature of the sensor to stabilize for ten minutes (minimum). Utilize the editing keys of the IRC to standardize the transmitter's temperature reading to that of the sample solution. Press ENTER to standardize the temperature reading and return to the tEMP AdJ menu segment.

2. Press NEXT to enter the tEMP SLOPE menu segment.

The correct temperature slope must be entered into the transmitter to ensure an acceptable process variable measurement under fluctuating process temperature conditions. This can be done two ways:

A. At the tEMP SLOPE prompt it allows for input of

conductance values of the specific process solution being measured.

Press ENTER. t1 will be displayed. Enter the conductance of the process solution at room/process temperature.

Press ENTER. t2 will be displayed. Warm the process solution to an elevated stable temperature of normal operation. Adjust the t2 value to the conductance at this higher temperature. Press ENTER. The transmitter will calculate the slope and use it in all process measurements. If slope error occurs, the calculated slope is no different than the currently input slope. Press RESET.

B. Alternatively, the slope can be input directly.

Press NEXT. Adj SLOPE appears. Press ENTER at the prompt and input the known slope. Press ENTER.

Press EXIT to return to main display.

NOTE

The range of slope is in %/°C, with a maximum of

5.0%.

5.3 CALIBRATE MENU (Percent Concentration).

The following steps can be used for initial set-up and standardization where toroidal (t) sensors are employed for percent concentration measurements.

NOTE

To accurately measure % concentrations, the appropriate equation must be used. This requires changing the tYPE under the dISPLAY sub-menu in the Program menu to the correct chemical and concentration.

MODEL CELL CONSTANT

222 4.0 & 6.0

225 3.0

226 1.0

228 3.0

TABLE 5-1. NOMINAL CELL CONSTANTS*

* Check sensor labels for actual, if given.

CALIbrAtE Calibrate menu header CAL Sensor calibration tE

P SLOPE Sub-menu header t1 First temperature conductivity reading for slope calculation t2 Second temperature conductivity reading for slope calculation Adj SLOPE Sub-menu header tSLOPE Slope adjustment %/°C CELL COnSt Sub-menu header CELL Cell constant value SEnSOr Sub-menu header SEnSOr 0 Sensor "0" conductivity in air RESEt Pct Reset percent concentration offset to factory default of zero (0) tE

P AdJ Sub-menu header

tEMP Temperature adjustment °C/°F

1. To access the CALIbrAtE menu, press the CAL key on the Infrared Remote Control. If security has been enabled, the secondary process display will be replaced with a prompt asking for the “Id”. Using the IRC editing keys, enter the “Id”. If the correct “Id” is entered, the CALIbrAtE menu will appear when ENTER is pressed. If CALIbrAtE menu does not appear when ENTER is pressed, see Section 4.3, step 9, for procedure to find correct code.

NOTE

Reset can be pressed at any step to return to the process display and override any value not previously entered.

2. When the calibrate menu segment has been accessed, press the NEXT and ENTER commands to access the CELL menu segment with the flashing cell constant prompt.

3. Utilizing the arrow keys on the IRC, generate the

correct cell constant of the sensor being used.

NOTE

Cell constants are sensor dependent. Table 5-1 lists the nominal cell constants for the four sensors compatible with the Model 4081T.

4. Press ENTER to activate selected cell constant and return to the CELL COnSt menu segment.

5. Press NEXT to enter the SEnSOr 0 menu segment and press ENTER to access the do SEnSOr 0 subsegment. With the attached sensor stabilized in dry air, press ENTER again to zero the sensor.

The CALIbrAtE menu is reaccessed.

6. Press ENTER. CAL will appear. Immerse the toroidal sensor into a solution of known percent of the chemical to be measured and input that percent. Allow the sensor to stabilize at the solution temperature (about 10 min).

Enter the value of the standard solution and press ENTER. “Processing” will appear when the calibration is made; then the menu will return to CALIbrAtE.

7. Press NEXT. The CELL COnSt menu segment will appear. The cell constant will have been changed to reflect the calibration step above. Press ENTER to display the new cell constant.

8. Press NEXT to enter the SEnSOr 0 menu segment. Do not press ENTER unless a new air calibration is desired.

9. Press NEXT to enter the rESEtPct menu segment. This resets the SEnSOr 0 offset value to zero.

10. Press NEXT to access the tEMP AdJ menu segment. Pressing ENTER allows access to the cursor so a user specified temperature can be input. The current temperature is displayed. If this is acceptable, press ENTER.

11.Press RESET to return to the process display.

5.4 ON-LINE -TRANSMITTER / SENSOR CALIBRATION

For maximum accuracy, calibrate the sensor in the process. This should be done after the initial transmitter calibration and periodically thereafter as required. Online calibration is well-suited for most toroidal measurements.

NOTE

The calibration adjustment allows the process conductivity to be adjusted to the conductivity from other measurements. However, it can only be changed a maximum of 5%. Greater changes will result in a slope error message. If greater changes are required, the cell constant used in Section 5.2 needs to be changed.

MODELS 4081T SECTION 5.0

START-UP AND CALIBRATION

5-4

TABLE 5-2. CALIBRATE MENU MNEMONICS

6-1

6.1 OVERVIEW

The Model 4081T transmitter automatically monitors for fault conditions. The Diagnose Menu allows the current variable settings to be reviewed and shows fault messages indicating problems detected. Figure 6-1 illustrates the relationship between the Diagnose Menu and its sub-menus. The factory-set diagnose values are illustrated in Figure 6-2. The mnemonics are defined in Table 6-1.

6.1.1 TROUBLESHOOTING

Step 1 Look for a diagnostic fault message on the

display to help pinpoint the problem. Refer to Table 6-2 for an explanation of the message and a list of the possible problems that triggered it.

Step 2 Refer to the Quick Troubleshooting Guide,

Table 6-3, for common loop problems and the recommended actions to resolve them.

MODELS 4081T SECTION 6.0

DIAGNOSIS AND TROUBLESHOOTING

SECTION 6.0

DIAGNOSIS AND TROUBLESHOOTING

Step 3 Follow the step by step troubleshooting flow

chart, offered in Figure 6-5, to diagnose less common or more complex problems.

6.1.2 DISPLAYING DIAGNOSTIC VALUES

The DIAG key on the IRC is used to access the Diagnosis Menu. The menu flow is shown in Figure 6-2 and the mnemonics are defined in Table 6-1.

The ShoW FLT sub-menu can be entered to show the last three faults/warnings. The most recent is displayed first; NEXT scrolls through the remaining faults. Pressing EXIT clears all fault/warnings and returns the SHoW FLT segment. Disconnecting power removes all fault messages from memory. The nonE is displayed when no faults/warnings have occurred.

CURRENT OPERATING MENU

KEYPRESS COMMANDS

Menu Segment/Prompt

Area

Calibrate Menu

Segments/Commands

Program Menu

Segments/Commands

DIAGNOSE MENU

Segments/Commands

fACtOr

EXIT NEXT ENTER

AbSC

EXIT NEXT ENTER

FIGURE 6-1. Diagnose Menu Segments

tSLOPE

EXIT NEXT ENTER

dISPLAY

EXIT NEXT ENTER

AdJ SLOPE

EXIT NEXT ENTER

P SLOPE

EXIT NEXT ENTER

ShoWJFLt

EXIT NEXT ENTER

SEnSOr O

EXIT NEXT ENTER

CELL

EXIT NEXT ENTER

UEr 81T 10

EXIT NEXT ENTER

CALIbrAtE

EXIT NEXT ENTER

CELL COnSt

EXIT NEXT ENTER

tEMP AdJ

EXIT NEXT ENTER

CalibrateProgram Diagnose

IIdd 000000

Exit Enter

6-2

AbSC Absolute conductivity (µS/cm or mS/cm)

CELL Sensor cell constant used in T or % con-

centration display type

FActOr Calibration factor

nonE No fault messages activated

Sho

FLt

Show fault messages

tSLOPE Temperature slope in %/ °C

UEr 81t10 Software version, CPU board

MODELS 4081T SECTION 6.0

DIAGNOSIS AND TROUBLESHOOTING

Calibrate Program Diagnose

Exit Enter

Return to

Main

Screen

TABLE 6-1. Diagnostic Variables Mnemonics

AbS C 1000

EXIT NEXT

UEr 81T 10

EXIT NEXT

ShoWJFLt

EXIT NEXT ENTER

nonE

EXIT NEXT

FActor 1.000

EXIT NEXT

tSLOPE 2.000

EXIT NEXT

CELL 1.000

EXIT NEXT

µS

FIGURE 6-2. Diagnose Values

6-3

MODELS 4081T SECTION 6.0

DIAGNOSIS AND TROUBLESHOOTING

6.2 FAULT CONDITIONS

Three classes of error conditions/problems can be detected and are differentiated by the diagnostic program. System disabling problems are faults caused by failures in the loop or significant variations in the process. System non-disabling problems are warnings and deal with inputted signals/values or Analog to Digital conversion settings. The third class of detected problems are error messages and occur when the calibration limits are exceeded.

6.2.1 DISABLING FAULTS

1. Both FAULT and HOLD annunciation fields will become active (see Figure 6-3).

2. The process variable will flash at the rate of 1 second ON and 1 second OFF.

3. The appropriate fault message alternates with the normal Temperature display (see Figure 6-3).

CALIBRATE PROGRAM DIAGNOSE

“ LInE FAIL” 

EXIT NEXT ENTER

1000

µS/cm

F A U L T

H O L D

FIGURE 6-3. Disabling Fault Annunciation

CALIBRATE PROGRAM DIAGNOSE

“ InPut WJArn” 

EXIT NEXT ENTER

1000

µS/cm

FIGURE 6-4. Non-Disabling Warning Annunciation

6.2.2 NON-DISABLING WARNINGS

When a non-system disabling condition occurs, a warning message is displayed. The Process variable does not flash. The appropriate message alternates with the Temperature display (see Figure 6-4).

If more than one fault exists, the display will sequence through the diagnostic messages. This will continue until the cause of the fault has been corrected.

F A U L T

H O L D

6-4

MODELS 4081T SECTION 6.0

DIAGNOSIS AND TROUBLESHOOTING

6.3 DIAGNOSTIC MESSAGES

The Model 4081T transmitter’s diagnostics constantly monitor the system for possible problems. If an operational problem is encountered, check the display for a fault or error message. These are displayed in the Temperature segment of the display. Note the message and refer to Table 6-2 for a description of possible problems that may have triggered the diagnostic message.

Message Description Action

Faults

P LO Low temperature limit of 0.0° C is exceeded (too low). Check wiring or sensor/process temp.

Check RTD

P HI High temperature limit of 100.0° C is exceeded (too high). Check wiring or sensor/process temp.

Check RTD

LInE FAIL The RTD sense line fault limits have been exceeded Check wiring or Check Program/Temp

for the sensor. menu setting to verify the 100-3

sensor type connected.

CPU FAIL The CPU has failed during RAM or EEPROM Recycle the power. If persistent contact

verification. the factory.

FACt FAIL The transmitter has not been accurately factory calibrated. Contact factory.

FAIL The PROM failed the check-sum test. Contact factory.

CYCLE P

r A wrong value was detected during power-up. Recycle the power.

Sensor fail Conductivity too low or open Verify the solution type setting

Simulate sensor (Figure 6.5) to check

transmitter

Replace sensor

Warnings

InPut WjArn The compensated conductivity limit of 9999 mS/cm is Verify the conductivity range setting.

exceeded.

AdC WjArn An analog to digital conversion error has occurred. Recycle the power.

Errors

CAL Err A calibration error has occurred between the standard Press RESET and repeat.

and process.

tSLOPE Err The limit for t2 in a two point calibration has been Press RESET and repeat the

exceeded ( > 5%). calibrate/temp slope menu setting.

-0- Err Sensor Zero limit has been exceeded. Press RESET and repeat the cali-

brate/sensor menu setting.

WjRITE Err An attempt to write on the EEPROM has failed. The jumper JP-1 on the CPU board

has been removed.

TABLE 6-2. Diagnostic Fault Messages.

6-5

MODELS 4081T SECTION 6.0

DIAGNOSIS AND TROUBLESHOOTING

SYMPTOM ACTION

Wrong temperature reading. Perform a temperature standardization. Verify sensor's RTD. Suspected temp. compensation problem. Resistance vs. temp.; see Table 6.4; temperature may be out of range of sensor.

Check wiring. Check jumpers and RTD configuration on display Display segments missing. Display inoperable. Replace Display board. If fault continues, check CPU board. Analyzer locks up; won't respond. Replace PCB stack.

Press Reset on IRC.

Check batteries in IRC. Erratic displays. Check sensors in process.

Transmitter won't respond to IRC key presses. Verify and clean ribbon cable connection on CPU board.

Check batteries in IRC

Key press gives wrong selection. Replace IRC. Check ribbon cable connection on CPU board. No display or indicators. Check power connections. Replace PCB stack. ”Excess Input” Check sensor wiring. “Reverse Input” Perform sensor zero. “Check sensor zero” Analyzer will not zero; place sensor in air and perform zero routine (see Section 5.2).

Table 6-3 identifies some of the more common symptoms and suggests actions to help resolve a problem. In general, wiring is most commonly at fault.

6.4 QUICK TROUBLESHOOTING GUIDE

TABLE 6-3. Quick Troubleshooting Guide.

When it is apparent by grab sample analysis that the transmitter is giving inaccurate readings, the following procedure should be followed.

A. A quick visual inspection of the installation may identify

the problem. Check to be sure that the transmitter is mounted securely and that its internal parts are properly connected.

B. Recheck to ensure the power supply is connected to

the correct pins in the transmitter and that power is being received.

C. Check the sensor to transmitter terminal wiring and that

all connections are tight. Most error messages are generated by incorrect wiring and will indicate if the RTD or the toroid are connected incorrectly.

D. The sensor must be immersed into the process stream

to the top of the toroid.

E. Verify that the sensor is clean and the process is flow-

ing through and around the toroid.

6.4.1 FIELD TROUBLESHOOTING

6-6

MODELS 4081T SECTION 6.0

DIAGNOSIS AND TROUBLESHOOTING

6.5 SYSTEMATIC TROUBLESHOOTING

Not all the problems encountered will be typical. If the Quick Troubleshooting Guide will not resolve the error, then try the step-by-step approach offered in this section.

Conductivity Measurement

Problem (in the process)

Remove the sensor from process

and place sensor in air. Zero transmitter.

Refer to Section 5.2 and 5.3.

OK?

Consult

Service Center

YES

Does problem

still exist?

NOTE:

Before starting this procedure make sure that all wiring is correct.

FIGURE 6-5. Troubleshooting Flow Chart

Step 1 Follow the applicable troubleshooting flow chart

below:

Step 2 Refer to the tests and instructions indicated by

the flow chart to diagnose the problem.

Place sensor in process and

standardize. Refer to Section 5.2.

OK?

Restart

Transmitter

Remove sensor from process and test in known conductivity solution

OK?

Check wiring

for short and check

jumpers for correct

configuration

Check diagnostic

messages

Refer to Table 6-2

Check for ground

loops and/or

improper installation

YES

MODELS 4081T SECTION 6.0

DIAGNOSIS AND TROUBLESHOOTING

6.6 RTD RESISTANCE VALUES

Table 6-4 is a ready reference of RTD resistance values at various temperatures. These are used for test and evaluation of the sensor.

NOTE

Ohmic values are read across the RTD element and are based on the manufacturer’s stated values (±1%). Allow enough time for the RTD element in the sensor to stabilize to the surrounding temperature (10 min).

Temperature Pt-100

(°C) Resistance (ohms)

0 100.00

10 103.90 20 107.79 25 109.73 30 111.67 40 115.54 50 119.40 60 123.24 70 127.07 80 130.89 90 134.70

100 138.50

Table 6-4. RTD Resistance Values.

Table 6-5. Conductivity Determination.

6-7

FORMULA:

EXAMPLE:

cell constant value x 1,000,000

desired simulated conductivity in µs/cm

.01 x 1,000,000

10 µs/cm

Use the following formula to determine the appropriate resistance value to use to simulate a conductivity value:

= resistance in ohms

= use 1,000 ohm resistance

6-8

7-1

MODELS 4081T SECTION 7.0

MAINTENANCE

SECTION 7.0

MAINTENANCE

7.1 OVERVIEW

Maintenance consists of "Preventative" and "Corrective" measures.

7.2 PREVENTATIVE MAINTENANCE

7.2.1 Sensor Maintenance. Sensor maintenance

consists of periodic cleaning of the electrode. If the sensor is coated, the sensor must be cleaned.

A weekly cleaning is a good starting maintenance schedule. This schedule can then be fine tuned to the site process.

7.2.2 Transmitter Maintenance. Transmitter maintenance consists of periodic calibration. A monthly calibration is a good starting maintenance schedule. This schedule can then be fine tuned to the site process.

7.2.3 Initiating HOLD Function For Maintenance. To place the transmitter into the Hold operational mode prior to servicing the sensor, press the HOLD key on the IRC. The message field will respond with a message concerning the present hold condition. Press the IRC editing key to toggle to the On condition. Press ENTER to activate HOLD output.

Hold Mode will maintain the operating parameters regardless of process changes.

The section of the LCD reserved for hold annunciation (Refer to Figure 7-1) will display HOLD when the transmitter is in the Hold Mode.

Always calibrate after cleaning or replacing the sensor.

To return transmitter to normal operation, press HOLD on the IRC.

Press the IRC editing key to toggle to the OFF condition. Press ENTER to disengage the HOLD output function.

1000

µS/cm

F A U L T

H O L D

FIGURE 7-1. Hold Annunciation

Hold field Illuminated

CALIBRATE PROGRAM DIAGNOSE

22 550CC

EXIT NEXT ENTER

7.3 CORRECTIVE MAINTENANCE

Refer to Figure 7-2 for an exploded view of the 4081T Transmitter.

Table 7-1 lists suggested spare parts along with part numbers. Sales and service locations are located on the back pages of this manual.

7-2

FIGURE 7-2. Exploded View of Model 4081T Transmitter

MODELS 4081T SECTION 7.0

MAINTENANCE

}

TABLE 7-1. Replacement Parts for Model 4081T Transmitter

Location in Shipping

Figure 7-1 PN Description Weight

1 23811-02 PCB stack consisting of the CPU, communication, and analog boards; 1 lb/0.5 kg

display board is not included; CPU, communication, and analog boards are factory-calibrated as a unit and cannot be ordered separately

2 23652-01 LCD display PCB 1 lb/0.5 kg

5 33337-02 Terminal block 1 lb/0.5 kg

6 23593-01 Enclosure cover, front with glass window 3 lb/1.5 kg

7 33360-00 Enclosure, center housing 4 lb/1.5 kg

8 33362-00 Enclosure cover, rear 3 lb/1.0 kg

9 6560135 Desiccant in bag, one each 1 lb/0.5 kg

9550187 O-ring (2-252), one, front and rear covers each require an O-ring 1 lb/0.5 kg

12 note Screw, 8-32 x 0.5 inch, for attaching terminal block to center housing *

13 note Screw, 8-32 x 1.75 inch, for attaching circuit board stack to center *

housing

14 33342-00 Cover lock 1 lb/0.5 kg

33343-00 Locking bracket nut 1 lb/0.5 kg

note Screw, 10-24 x 0.38 inch, for attaching cover lock and locking bracket *

nut to center housing

NOTE: For information only. Screws cannot be purchased from Rosemount Analytical. * Weights are rounded up to the nearest whole pound or 0.5 kg.

8-1

MODELS 4081T SECTION 8.0

PRODUCT DATA

SECTION 8.0

PRODUCT DATA

• REMOTE COMMUNICATION IS SIMPLE; use the hand-held infrared remote controller, DeltaV

, or FOUNDATION2Fieldbus host.

• LARGE TWO LINE DISPLAY shows conductivity and temperature.

• SIMPLE, INTUITIVE menus make programming and calibrating easy.

• INDUCTIVE CONDUCTIVITY AND PERCENT CONCENTRATION MEASUREMENTS with both high accuracy and linearity.

• ROBUST NEMA 4X and NEMA 7 ENCLOSURE protects the transmitter from harsh plant environments.

• INTRINSICALLY SAFE DESIGN allows the transmitter to be used in hazardous environments (with appropriate safety barriers).

• NON-VOLATILE EEPROM MEMORY retains program settings and calibration data during power failures.

FEATURES

REMOTE COMMUNICATIONS: Remote communica-

tions with the Model 4081T transmitter is easy. The hand-held, push button infrared remote controller works from as far away as six feet. The transmitter also communicates via any F

OUNDATION fieldbus host,

such as the Fisher Rosemount DeltaV system. DISPLAY: The 0.8-inch high LCD main display means

conductivity values are easy to read even at a distance. Temperature reading also appears in a 0.3 inch high display.

MENUS: Menu formats for calibration and programming are simple and intuitive. Prompts guide the user through the basic procedures. Diagnostic and error messages appear in plain language. There are no annoying error codes to look up.

Remote Control and Digital Communication Capability Make Interface Convenient, Regardless of Transmitter Location: Direct user interface is

achieved via an infrared remote controller that provides access to a self-prompting menu for programming, calibration, standardization, and interrogation. Digital communication capability through FOUNDATION fieldbus or AMS (Asset Management Solutions) software stretches the user’s access from anywhere in the factory to anywhere outside the factory.

1. DeltaV is a trademark of Fisher-Rosemount.

FOUNDATION is a registered trademark of Fieldbus Foundation.

MODELS 4081T SECTION 8.0

PRODUCT DATA

FUNCTIONAL SPECIFICATIONS

Calibration: Calibration is easily accomplished by

immersing the sensor in a known solution and entering its value.

Power Supply and Load Requirements:

A power supply voltage of 9 Vdc to 32 Vdc at 22 mA is required; Intrinsically Safe installations may be limited to a maximum of 2-3 transmitters per node, depending on the barrier used.

Automatic Temperature Compensation:

3-wire Pt 100 RTD Conductivity: 0 to 200°C (32 to 392°F) % Concentration: 0 to 100°C (32 to 212°F)

Local Readout: LCD display may be set in one of

three positions at 90° increments for optimum legibility independent of mounting. Main display is 4 digits, 20 mm (0.8 in.) tall. Message display is ten digits 7 mm (0.3 in.) tall

Diagnostics: The internal diagnostics can detect:

Calibration Error Zero Error Temperature Slope Error Low Temperature Error High Temperature Error Sensor Failure Line Failure CPU Failure ROM Failure Input Warning

Once one of the above is diagnosed, the LCD will display a message describing the failure/default detected.

OUNDATION Fieldbus:

3 AI Function Blocks: conductivity, temperature, and absolute conductivity

Execution time: 75 milliseconds

PID Block (optional)

Execution time: 100 milliseconds

Ambient Temperature: –20 to 65°C. (–4 to 149°F) Failure Mode Alarm: When a fault is detected, the

display will indicate a fault.

Configuration Security: Access to the transmitter

configuration and reconfiguration modes may be restricted via user selected security codes.

Enclosure: NEMA 4X (IP65), weatherproof and

corrosion resistant; NEMA 7, explosion-proof

CE: EMI/RFI Certification

EN-61326

Hazardous Area Classification:

Explosion Proof:

FM: Class I, Div. 1, Groups B, C & D

Class II, Div. 1, Groups E, F, & G Class III, Div. 1

CSA: Class I, Div. 1, Groups C& D

Class I, Div. 2, Groups A, B, C & D Class II, Div. 2, Groups E, F & G Class III, Div. 1

Intrinsic Safety:

FM: Class I, II & III, Div. 1

T4 T AMB= 40°C; T3AT AMB= 70°C

CSA: Class I, Div. 1

T 3C T AMB=40°C; T3 T AMB=80°C

CENELEC: EEx ia IIC

T5 Tamb=40°C; T4 Tamb=60°C

Non-Incendive:

FM: Class I, Div. 2, Groups A, B, C & D CSA: Class I, Div. 2, Groups A, B, C & D T5

(Tamb=40°C)

PHYSICAL SPECIFICATIONS - General

Housing: Epoxy-polyester painted over low-copper

aluminum. Neoprene O-rings on cover. 160.5 mm x 175.3 mm x 161.3 mm (6.3 in. x 6.9 in. x 6.4 in.)

Diameter: 155.4 mm (6.1 in.) Electrical Conduit Openings: 2 X 3/4 in. FNPT Weight/Shipping Weight: 4.18 kg/4.27 kg (9.2/9.4 lb)

TRANSMITTER SPECIFICATIONS @ 25°C

Measured Range*: 0 to 2,000,000 µS/cm Accuracy: ± 1.0% of reading Repeatability: ± 0.25% of reading Stability: 0.25% of output range/month, non-cumulative Ambient Temperature Coefficient: ± 0.2% of FS/°C Temperature Slope Adjustment: 0-5%/° C % Concentration Ranges:

Sodium Hydroxide: 0 to 12% Hydrochloric Acid: 0 to 15% Sulfuric Acid: 0 to 25% and 96 to 99%

LOOP SPECIFICATIONS (see table below)

Accuracy: ± 1.0% ± 2 least significant digit

MANUAL RANGE 1 2 3 4

Low Range 80 - 800 800 - 8,000 8,000 - 80,000 80,000 - 400,000

(accuracy: ± 1.0%)

High Range 1,100 - 11,000 11,000 - 110,000 110,000 - 1,200,000 N/A

(accuracy: ± 1.0%)

*NOTE: Values shown are for 25°C conductivity with a temperature slope of 2% per degree C. The maximum range value will be higher for

solutions with a lower temperature slope, and lower for solutions with a higher temperature slope. Values shown are for uncompensated conductivity using a cell constant of 1.0. The conductivity values auto range from 0 to 2,000,000 µS/cm with an accuracy of 5 to 10% ±150 µS/cm depending on the process conditions, installation, and the sensor used. For greater accuracy and repeatability, manual range selection is recommended.

Measurement Range (µS/cm)*

8-2

MODELS 4081T SECTION 8.0

PRODUCT DATA

8-3

FIGURE 8-2. Infrared Remote Control

TRANSMITTER DISPLAY (Figure 8-1)

The liquid crystal display (LCD) provides valuable user information clearly identified as follows:

1. Continuous process display.

2. Process temperature displayed during process operation mode.

3. Options within sub-menus become visible when in each selected menu.

4. Selected menu becomes visible after the appropriate “Menu key” on the IRC is activated.

5. “Hold” is displayed when the analyzer is in hold, test or fault mode. Pressing the “HOLD” key on the IRC will place the transmitter in a hold mode.

6. “Fault” is displayed should a system disabling fault occur.

INFRARED REMOTE CONTROL FUNCTIONS (Figure 8-2)

All operating functions of the Model 4081T are accessed and activated through the hand-held Infrared Remote Control (IRC).

1. MENU KEYS: Allow access to calibrate, program and diagnose menus.

2. VARIABLE ENTRY KEYS: Allow the operator to enter data, move between sub-menus and edit.

3. EDITING KEYS: Allow navigation through the pre-programmed variables or editable digits. These arrow keys scroll across digit fields when entering numbers.

4. SPECIAL ENTRY KEYS:“Hold” key activation drives the reading to a preprogrammed level. “Reset” key activation aborts the current function and exits to the on-line process display mode.

FIGURE 8-1. Transmitter Display

-00.00

F A U L T

H O L D

CALIBRATE PROGRAM DIAGNOSE

EXIT NEXT ENTER

088.000

FIGURE 8-3. Functional Block Diagram for the Model 4081T Transmitter with FOUNDATION Fieldbus

MODELS 4081T SECTION 8.0

PRODUCT DATA

8-4

MODEL / PN DESCRIPTION

2002577 Two Inch Pipe Mounting Kit 23572-00 Infrared Remote Controller

ORDERING INFORMATION

The Model 4081T two-wire microprocessor transmitter is housed in a NEMA 4X and NEMA 7 case. Communication with the transmitter is through a hand-held infrared remote controller, DeltaV or FOUNDA- TION Fieldbus host. Standard features include µS, mS, and % concentration measurements, as well as automatic or manual temperature compensation.

MODEL

4081T FOUNDATION FIELDBUS TWO-WIRE MICROPROCESSOR TRANSMITTER

Code REQUIRED SELECTION 03-20 LCD (Infrared Remote Control - included), 9.4 lb/4.3 kg 03-21 LCD (Infrared Remote Control - not included)

RECOMMENDED SENSORS:

Model 222 Flow-Through Toroidal Conductivity Sensor

Model 225 Clean-In-Place (CIP) Conductivity Sensor

Model 226 Submersion/Insertion Conductivity Sensor

Model 228 Submersion/Insertion/Retractable Toroidal Conductivity Sensor

ACCESSORIES

Code AGENCY APPROVALS (no selection required)

67 FM approved, Intrinsically Safe (when used with approved sensor and safety barrier) and Explosion Proof 69 CSA approved, Intrinsically Safe (when used with approved sensor and safety barrier) and Explosion Proof 73 CENELEC approved, Intrinsically Safe (safety barrier required)

4081T - 01 - 20 - 67 EXAMPLE

9-1

MODELS 4081T SECTION 9.0

OPERATION WITH REMOTE CONTROLLER

SECTION 9.0

OPERATION WITH REMOTE CONTROLLER

FIGURE 9-1. Functional Block Diagram for the Model 4081T Transmitter with FOUNDATION Fieldbus

OVERVIEW

This section covers basic transmitter operation and software functionality. For detailed descriptions of the function blocks common to all Fieldbus devices, refer to Fisher-Rosemount Fieldbus FOUNDATION Function Blocks manual, publication number 00809-4783.

Figure 9-1 illustrates how the conductivity signal is channeled through the transmitter to the control room and the

OUNDATION Fieldbus configuration device.

Software Functionality. The Model 4081T software is designed to permit remote testing and configuration of the transmitter using the Fisher-Rosemount DeltaV Fieldbus Configuration Tool, or other

FOUNDATION fieldbus compli-

ant host.

Transducer Block. The transducer block contains the actual measurement data. It includes information about sensor type, engineering units, reranging, damping, temperature compensation, calibration, and diagnostics.

Resource Block. The resource Block contains physical device information, including available memory, manufacturer identification, type of device, and features.

OUNDATION Fieldbus Function Blocks. The Model 4081T includes three Analog Input (AI) function blocks and one

Input Selector (ISEL) function block as part of its standard offering.

Analog Input. The Analog Input (AI) block processes the measurement and makes it available to other function blocks. It also allows filtering, alarming, and engineering unit change.

Characterizer (optional). The characterizer block changes the characteristic of the input signal. Common uses of the characterizer block include converting temperature to density or humidity, and converting millivolts to temperature for an IR sensor.

MODELS 4081T SECTION 10.0

RETURN OF MATERIALS

10-1

SECTION 10.0

RETURN OF MATERIALS

GENERAL.

To expedite the repair and return of instruments, proper communication between the customer and the factory is important. Before returning a product for repair, call 1-949-757-8500 for a Return Materials Authorization (RMA) number.

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:

Rosemount Analytical Inc., Uniloc Division Uniloc Division 2400 Barranca Parkway Irvine, CA 92606

Attn: Factory Repair

RMA No. ____________

Mark the package: Returned for Repair

Model No. ____

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.

3. Do Steps 3 and 4 of Warranty Repair.

NOTE

Consult the factory for additional information regarding service or repair.

10-2

A-1

Display Timeout. The display returns to the Process display when the RESET key is pressed, or

if no key has been pressed for the timeout period. The normal timeout period is 2 minutes. During buffer calibration, the timeout period is 20 minutes. When in the Hold and Test Modes, the timeout feature is disabled.

Error Condition An error condition (“Std Err”, “SLOPE Err LO”, or “SLOPE Err HI”) occurred

during calibration due to a calculated value exceeding a calibration limit.

The appropriate error message is displayed in the Temperature display area.

Fault Condition A system disabling condition.

• The Fault and Hold display areas illuminate.

• The process variable flashes.

• An appropriate fault message appears in the Temperature display area.

• If not in the Test or Hold Modes, the output current goes to the nonZero fault value.

Menu segment A term used to define submenus, within the menu programs, that are

used to select the set of prompts required to set-up the transmitter during configuration

Item/Value Item refers to a parameter contained in a list of parameters. (e.g., "On" and

"OFF").

Value refers to a parameter value that may be edited (e.g., CAL “1”000 µS/cm).

Main Menus Those menus available to calibrate, set up, and diagnose transmitter

operation using variables other than the factory default settings.

Process Display The Main display consists of:

• the Primary process variable (conductivity, % concentration or resistivity) in large numerals (in the top half of the display), and

• the temperature measurements (shown in the lower portion of the display).

Prompt A message that appears in the temperature display area

requesting a response from the operator that is either a numerical value, or an item from the list associated with the parameter being edited.

Mnemonics Short descriptions that aid or help memory.

MODELS 4081T APPENDIX A

GLOSSARY

APPENDIX A

GLOSSARY

RTD Resistive Temperature Device used to provide temperature signal to

instrument.

Special Entry keys Those keys on the IRC pressed to access the DIAGNOSE, HOLD and RESET

functions of the transmitter.

• The Diagnose function gives access to information about absolute conductivity, sensor (cell constant value, calibration constant, and cell factor), temperature slope, transmitter software version and fault messages, to aid in interpretation of Fault and Warning conditions.

• The HOLD function is used to maintain the conductivity value to a predetermined value while enabled.

• The RESET function aborts the current operation and returns to the Process Display Screen.

Temperature Offset A value calculated by the instrument to make RTD measurement displayed

match site value. Calculated during the TEMPERATURE ADJUSTMENT function to match the RTD reading with a known site standard.

Warning Conditions. When a non-system disabling condition occurs, an appropriate message is dis-

played in the temperature display area.

Raw Conductivity Conductivity that is not factory or process calibrated, or compensated for tem-

perature.

Absolute Conductivity Conductivity that is factory calibrated, but not process calibrated or compen-

sated for temperature.

Conductivity Conductivity that is factory and process calibrated and compensated for tem-

perature.

Resistivity A value equal to the inverse of the conductivity.

MODELS 4081T APPENDIX A

GLOSSARY

GLOSSARY (Continued)

A-2