Emerson 2081T, 2081C User Manual

0 (0)

Instruction Manual

PN 51-2081C/T/rev.B

April 2003

Model 2081C/T

Conductivity Microprocessor Transmitter

ESSENTIAL INSTRUCTIONS

READ THIS PAGE BEFORE PROCEEDING!

Rosemount Analytical designs, manufactures, and tests its

Inform and educate your personnel in the proper installation,

products to meet many national and international standards.

 

operation, and maintenance of the product.

Because these instruments are sophisticated technical prod-

Install your equipment as specified in the Installation

ucts, you must properly install, use, and maintain them to

ensure they continue to operate within their normal specifica-

 

Instructions of the appropriate Instruction Manual and per

tions. The following instructions must be adhered to and inte-

 

applicable local and national codes. Connect all products to

grated into your safety program when installing, using, and

 

the proper electrical sources.

maintaining Rosemount Analytical products. Failure to follow

• To ensure proper performance, use qualified personnel to

the proper instructions may cause any one of the following situ-

 

install, operate, update, program, and maintain the product.

ations to occur: Loss of life; personal injury; property damage;

 

damage to this instrument; and warranty invalidation.

When replacement parts are required, ensure that qualified

 

 

Read all instructions prior to installing, operating, and servic-

 

people use replacement parts specified by Rosemount.

 

ing the product. If this Instruction Manual is not the correct

 

Unauthorized parts and procedures can affect the product’s

 

manual, telephone 1-800-654-7768 and the requested man-

 

performance and place the safe operation of your process at

 

ual will be provided. Save this Instruction Manual for future

 

risk. Look alike substitutions may result in fire, electrical haz-

 

reference.

 

ards, or improper operation.

If you do not understand any of the instructions, contact your

Ensure that all equipment doors are closed and protective

 

Rosemount representative for clarification.

 

covers are in place, except when maintenance is being per-

Follow all warnings, cautions, and instructions marked on and

 

formed by qualified persons, to prevent electrical shock and

 

personal injury.

 

supplied with the product.

 

 

 

 

NOTE

The Model 2081C/T Two-wire transmitter is certified for use in areas requiring intrinsic safety area by FM, CSA, and CENELEC. However, the CENELEC certification requires that a Model 2081C/T used with contacting sensors be certified separately from those using inductive (toroidal) sensors. The type of sensor must be specified with the order for a CENELEC certified transmitter.

Since this decision is required prior to shipment, the instruction manual covers both configurations. However, if the transmitter is reconfigured in the field, it may not meet CENELEC certification conditions.

About This Document

This manual contains instructions for installation and operation of the Model 2081C/T Conductivity Transmitter. The following list provides notes concerning all revisions of this document.

Rev. Level

Date

Notes

A

7/01

This is the initial release of the product manual. The manual has been refor-

 

 

matted to reflect the Emerson documentation style and updated to reflect any

 

 

changes in the product offering.

B

4/03

Updated CE certification

Emerson Process Management

Rosemount Analytical Inc.

2400 Barranca Parkway

Irvine, CA 92606 USA

Tel: (949) 757-8500

Fax: (949) 474-7250

http://www.raihome.com

© Rosemount Analytical Inc. 2003

MODEL 2081C/T

 

TABLE OF CONTENTS

 

MODEL 2081C/T CONDUCTIVITY

 

 

MICROPROCESSOR TRANSMITTER

 

 

TABLE OF CONTENTS

 

Section

Title

Page

1.0

INSTALLATION ......................................................................................................

1

1.1

Unpacking and Inspection.......................................................................................

1

1.2

Mechanical Installation............................................................................................

1

1.3

Wiring ......................................................................................................................

1

1.4

Fault Mode and Security Jumpers ..........................................................................

2

1.5

Calibration and Setup..............................................................................................

3

1.6

Hazardous Locations — Explosion Proof Installation .............................................

3

1.7

Hazardous Locations — Intrinsically Safe Installation ............................................

3

2.0

DESCRIPTION OF CONTROLS ............................................................................

17

2.1

General....................................................................................................................

17

2.2

Menu Selection .......................................................................................................

17

2.3

Value Adjustment ....................................................................................................

17

3.0

RANGE CONFIGURATION ....................................................................................

18

3.1

General....................................................................................................................

18

4.0

START UP AND CALIBRATION ............................................................................

19

4.1

General....................................................................................................................

19

4.2

Temperature Calibration..........................................................................................

19

4.3

Entering the Cell Constant ......................................................................................

19

4.4

Zeroing the System .................................................................................................

19

4.5

Initial Loop Calibration.............................................................................................

19

4.6

Routine Standardization..........................................................................................

21

4.7

Hold Mold for Maintenance .....................................................................................

21

4.8

Sensor Maintenance ...............................................................................................

21

5.0

KEYBOARD SECURITY ........................................................................................

22

5.1

Push Button Security...............................................................................................

22

5.2

Eeprom Security......................................................................................................

22

6.0

DIAGNOSTICS AND TROUBLESHOOTING.........................................................

23

6.1

General....................................................................................................................

23

6.2

Contact Conductivity Mode Bench Check...............................................................

24

6.3

Toroidal Conductivity Mode Bench Check ..............................................................

25

6.4

Systematic Troubleshooting ....................................................................................

25

7.0

THEORY OF OPERATION .....................................................................................

29

7.1

General....................................................................................................................

29

7.2

Overview .................................................................................................................

29

8.0

DESCRIPTION AND SPECIFICATIONS................................................................

31

8.1

Features ..................................................................................................................

31

8.2

Functional Specifications ........................................................................................

32

8.3

Performance Specifications ....................................................................................

32

8.4

Physical Specifications............................................................................................

33

8.5

Recommended Sensors..........................................................................................

33

8.6

Ordering Information ...............................................................................................

34

8.7

Accessories .............................................................................................................

34

9.0

RETURN OF MATERIAL........................................................................................

36

 

i

 

MODEL 2081C/T

TABLE OF CONTENTS

TABLE OF CONTENTS CONT’D.

LIST OF FIGURES

Figure No. Title

Page

1-1

Model 2081C/T Dimensional/Mounting Instructions

 

 

with Power Supply/Loop Signal Wiring ...................................................................

4

1-2

Model 2081C/T Contacting Electrode Wiring..........................................................

5

1-3

Model 2081C/T Inductive Sensor Wiring ................................................................

6

1-4

Fault and Security Jumper Locations......................................................................

7

1-5

Sensor To Transmitter Switch Settings ...................................................................

7

1-6

Explosion Proof System Installation Schematic .....................................................

8

1-7

Intrinsically Safe (BASEEFA) Wiring for Model 2081C...........................................

9

1-8

Intrinsically Safe (BASEEFA) Wiring for Model 2081T ..........................................

11

1-9

Intrinsically Safe (CSA) Wiring for Model 2081C/T ................................................

13

1-10

Intrinsically Safe (FM) Wiring for Model 2081C/T ..................................................

15

3-1

Menu Description ....................................................................................................

17

5-1

Jumper Locations....................................................................................................

22

6-1

Bench Check (Contact Sensor) ..............................................................................

26

6-2

Bench Check (Toroidal Sensor) ..............................................................................

26

6-3

Troubleshooting Flow Chart ....................................................................................

28

7-1

Block Diagram.........................................................................................................

29

8-1

Load/Power Supply Requirements..........................................................................

32

8-2

Model 275 HART® Communication Menu Tree-Model 2081C/T ............................

35

LIST OF TABLES

Table No. Title

Page

3-1

Sensors used with Model 2081C/T conductivity .....................................................

18

3-2

Measurement Ranges.............................................................................................

18

6-1

Diagnostic Messages ..............................................................................................

23

6-2

Resistance Values (Temperature) ...........................................................................

24

6-3

Resistance Values (Conductivity)............................................................................

24

6-4

Quick Troubleshooting Guide..................................................................................

27

8-1

Local Interference Functions...................................................................................

32

8-2

Measurement Ranges.............................................................................................

32

ii

MODEL 2081C/T

SECTION 1.0

 

INSTALLATION

SECTION 1.0 INSTALLATION

1.1 UNPACKING AND INSPECTION. Inspect the transmitter for shipping damage. If damaged, notify the carrier immediately.

Confirm that all items shown on the packing list are present. Notify Rosemount Analytical if any items are missing.

If the transmitter appears to be in satisfactory condition proceed to Section 1.2.

NOTE

Save the original packing cartons and materials as most carriers require proof of damage due to mishandling.

1.2 MECHANICAL INSTALLATION.

1.2.1 General. The transmitter may be installed in harsh environments. However, it should be installed in an area where sources of extreme temperature fluctuation, vibration and shock are at a minimum or absent. Installation site should:

1.permit the use of the standard cable lengths (unless a junction box is used),

2.be easily accessed by operating and maintenance personnel, and

3.be at least 12 inches (.3 m) from sources of high voltage.

NOTE

Before installing the transmitter, it should be determined whether the Model 275 will be used with the 2081C/T.

1.2.2 Mounting. The transmitter may be mounted on a flat surface using the two threaded mounting holes located on the bottom of the transmitter or through the use of an optional 2-inch pipe/wall mounting bracket, Code 07 (Figure 1-1).

NOTE

The meter may be installed in 90-degree increments for easy viewing. Remove the four screws holding the meter in place and change the meter to the desired angle. Plug in the display and tighten the four screws.

1.3 WIRING. The transmitter is equipped with two 1/2- inch NPT conduit openings, one on each side of the housing. One is for the power supply/signal wiring and the other is for the sensor wiring.

The use of weathertight cable glands or conduit is recommended to prevent moisture from entering the housing. Conduit should be positioned to prevent condensation from draining into the housing. Conduit connections on the transmitter housing should be plugged and sealed to avoid moisture accumulation inside the terminal section of the housing.

CAUTION

If the connections are not sealed, mount transmitter with the electrical housing positioned downward for drainage. Wiring should be installed with a drip loop. The bottom of the drip loop should be lower than the conduit connections or the transmitter housing.

1.3.1 Power Supply/Signal Wiring. It is recommended that the signal wiring be shielded, twisted pairs that are grounded. The best place to ground the loop is at the negative terminal of the power supply. Do not ground the signal loop at more than one point. The transmitter case shall be grounded. The power and signal wiring terminal is TB2 terminals 1 through 4 as shown in either Figures 1-1, 1-2, and 1-3.

Signal or sensor wiring should never be run in the same conduit or open tray as AC power or relay actuated signal cables. Keep signal or sensor wiring at least 12 in. (.3 m) from heavy electrical equipment.

NOTE

For best EMI/RFI protection the power supply/signal cable should be shielded and enclosed in an earth grounded, rigid metal conduit. Connect the cable’s outer shield to the ground terminal near TB2, Figure 1-1. The sensor cable should also shielded. The cable’s outer shield shall be connected to the earth ground terminal provided near TB2, Figure 1- 1. If the outer shield is braided an appropriate metal cable gland fitting maybe used to connect the braid to earth ground via the instrument case.

A new addition to the suite of tests done to ensure CE compliance is IEC 1000-4-5. This is a surge immunity test that simulates overvoltages due to switching and lightning transients.

In order to meet the requirements of this test, additional protection must be added to the instrument in the form of a Transient Protector such as the Rosemount Model 470D. This is a 3½-inch tube with ½-inch MNPT threads on both ends. Inside the tube are gas discharge and zener diode devices to limit surges to the transmitter from the current loop. No additional protection is needed on the sensor connections.

1

MODEL 2081C/T

1.3.2 Sensor Wiring. The sensor wiring terminals are located on the side opposite to the LCD meter. Remove the housing cover to gain access. Pass the sensor cable through the transmitter’s conduit opening. Connect the sensor wiring to TB1 terminals 1 through 12 as shown on Figures 1-2 and 1-3.

NOTE

If the standard cable length is not sufficient for the planned installation, the use of a junction box with extension cable is strongly recommended. Do not exceed 250 feet (76m) total cable length from the sensor to the transmitter.

1.3.3 Matching Transmitter to sensor. Switches S4 and S5 are used to normalize the transmitter for Toroidal or contact sensors. See Figure 1-5.

Switches S4 and S5 should both be set to T when Toroidal sensors are installed, C when Contact sensors are installed.

Switches S1 and S2 are used to select the sensitivity range of the LCD. To obtain desired switch settings, multiply the cell constant of the probe being used by the maximum low range value. If the working range of the process is below this calculated value then set both switch to Lo. If the working range of the process is above this calculated value then set both switch to Hi (see table below).

Type

Maximum

Switch

Sensor

Range

Setting

Toroidal

Below 400,000µS x Cell Constant

Both “Lo”

 

Above 400,000µS x Cell Constant

Both “Hi”

 

 

 

Contacting

Below 4,000µS x Cell Constant

Both “Lo”

 

Above 4,000µS x Cell Constant

Both “Hi”

 

 

 

Sample: Model 142 sensor: .2 (cell constant) x 4,000µS (maximum low range value)= 800µS (calculated value).

1.4FAULT MODE AND SECURITY JUMPER

1.4.1 General This section describes how to set the jumpers on the CPU board for the following (See Figure 1-4).

1.Output value in fault (alarm) mode

2.Security - Write Disable

3.Security - Push Buttons

SECTION 1.0

INSTALLATION

CAUTION

The circuit board is electrostatically sensitive. Be sure to observe handling precautions for static-sensitive components.

1.4.2 Fault Mode Output. The default output of the transmitter during a fault condition is determined by the position of the default current output jumper JP3 (refer to Figure 1-4). The output can be set to default either:

below 4mA - JP3 with jumper.

above 20mA - JP3 without jumper (factory setting).

Store jumper on one post to prevent misplacing it. See Section 8.0 for corrective actions for fault messages.

Mnemonic Fault

SLP – FAIL - 2 point calibration error

AdC – FAIL - Transmitter electronics failure (A/D converter)

rngE – LOOP - Conductivity value outside 4-20 mA range points

tEnP – Lo - Temperature too low or RTD shorted tEnP – Hi - Temperature too high or RTD open

1.4.3 Security. Also explained in Section 6.0. These jumpers are located on the CPU board. See Figure 1-4 for location.

Disable 2081 push buttons - JP4 without jumper. (Store jumper on one post to prevent misplacing it).

Enable 2081 push buttons - JP4 with jumper (factory setting).

Disable all changes to configuration - JP1. Jumper in place disables any (EEPROM or push button) changes.

Allow changes to configuration - JP1 Jumper on one post only will enable configuration changes.

2

MODEL 2081C/T

1.5 CALIBRATION AND SET-UP

Instructions for output current ranging, security set ups, and calibration of sensor temperature, cell constant etc, are contained in Sections 2.0 through 5.0.

1.6 HAZARDOUS LOCATIONS — EXPLOSION PROOF INSTALLATIONS

In order to maintain the explosion proof rating for installed transmitter, the following conditions must be met.

1.Code 67 must be specified when ordering F.M. (Factory Mutual) units.

2.Explosion proof installation must be in accordance with Drawing Number 1400160 (see Figure 1-6).

3.The transmitter enclosure covers must be on hand tight and the threads must not be damaged.

NOTE

These covers seat on rings which serve to provide a dust proof enclosure for Class II and Class III installations.

4.Explosion proof “Y” fittings must be properly installed and plugged with a sealing compound to prevent explosive gases from entering the transmitter. CSA has determined that the transmitter housing is “Factory Sealed”. Installation of “Y” fittings and the use of sealing compound is not required for CSA approved Explosion Proof installations.

SECTION 1.0

INSTALLATION

NOTE

Do not install sealing compound until all field wiring is completed.

CAUTION

Sealing compound must be installed prior to applying power to the transmitter.

5.If one of the conduit connections on the housing is not used, it must be closed with a threaded metal plug with at least five threads engaged.

1.7 HAZARDOUS LOCATIONS — INTRINSICALLY SAFE INSTALLATIONS

See Figure 1-7 for Model 2081C intrinsically safe installation (BASEEFA). See Figure 1-8 for Model 2081T intrinsically safe installation (BASEEFA). See Figure 1- 9 for Model 2081C and 2081T intrinsically safe installation (CSA). See Figure 1-10 for Model 2081C and 2081T intrinsically safe installation (FM).

3

MODEL 2081C/T

SECTION 1.0

 

INSTALLATION

WHEN INCH AND METRIC DIMS

ARE GIVEN

MILLIMETER

INCH

DWG. NO.

REV.

40208120 A

FIGURE 1-1. Model 2081C/T Dimensional/Mounting Instructions with Power Supply/Loop Signal Wiring

4

MODEL 2081C/T

SECTION 1.0

 

INSTALLATION

WHEN INCH AND METRIC DIMS

ARE GIVEN

MILLIMETER

INCH

CE approved cable for Sensor Models 140, 141, 142, 150, 400, 401, 402, 403, & 404 using cable PN 9200275 or 23747-00

WIRE FUNCTIONS

CABLE PN 9200275 - UNPREPPED

CABLE PN 23747-00 - PREPPED

PN 9200275

DWG. NO.

REV.

40208119 A

FIGURE 1-2. Model 2081C Contacting Electrode Wiring

5

MODEL 2081C/T

SECTION 1.0

 

INSTALLATION

WHEN INCH AND METRIC DIMS

ARE GIVEN

MILLIMETER

INCH

DWG. NO.

REV.

40208106 C

FIGURE 1-3. Model 2081T Inductive Sensor Wiring

6

MODEL 2081C/T

SECTION 1.0

 

INSTALLATION

FIGURE 1-4. Fault and Security Jumper Locations

FIGURE 1-5. Sensor to Transmitter Switch Settings

7

MODEL 2081C/T

SECTION 1.0

 

INSTALLATION

FIGURE 1-6. Explosion Proof System Installation Schematic (FM)

8

Emerson 2081T, 2081C User Manual

MODEL 2081C/T

SECTION 1.0

 

INSTALLATION

DWG. NO.

REV.

1700294

C

 

 

FIGURE 1-7. Intrinsically Safe (BASEEFA) Wiring for Model 2081C

Part 1 of 2

9

Loading...
+ 29 hidden pages