Emerson 2081T, 2081C User Manual
Model 2081C/T
Conductivity Microprocessor Transmitter
Instruction Manual
PN 51-2081C/T/rev.B
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 1-800-654-7768 and the requested manual will be provided. Save this Instruction Manual for future
reference.
• If you do not understand any of the instructions, contact your
Rosemount representative for 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 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.
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.
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
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
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
ii
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
MODEL 2081C/T TABLE OF CONTENTS
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 SECTION 1.0
INSTALLATION
2
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).
Sample: Model 142 sensor: .2 (cell constant) x
4,000µS (maximum low range value)= 800µS (calculated value).
1.4 FAULT 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
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.
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 (fac-
tory 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.
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
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”
MODEL 2081C/T SECTION 1.0
INSTALLATION
3
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.
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 19 for Model 2081C and 2081T intrinsically safe installation (CSA). See Figure 1-10 for Model 2081C and
2081T intrinsically safe installation (FM).
MODEL 2081C/T SECTION 1.0
INSTALLATION
4
FIGURE 1-1. Model 2081C/T Dimensional/Mounting Instructions with Power Supply/Loop Signal Wiring
WHEN INCH AND METRIC DIMS
ARE GIVEN
MILLIMETER
INCH
DWG. NO. REV.
40208120 A
MODEL 2081C/T SECTION 1.0
INSTALLATION
5
WHEN INCH AND METRIC DIMS
ARE GIVEN
MILLIMETER
INCH
FIGURE 1-2. Model 2081C Contacting Electrode Wiring
PN 9200275
CABLE PN 9200275 - UNPREPPED
CABLE PN 23747-00 - PREPPED
CE approved cable for Sensor Models 140, 141, 142, 150, 400, 401, 402, 403, & 404 using cable PN 9200275 or 23747-00
WIRE FUNCTIONS
DWG. NO. REV.
40208119 A
MODEL 2081C/T SECTION 1.0
INSTALLATION
6
FIGURE 1-3. Model 2081T Inductive Sensor Wiring
DWG. NO. REV.
40208106 C
WHEN INCH AND METRIC DIMS
ARE GIVEN
MILLIMETER
INCH
MODEL 2081C/T SECTION 1.0
INSTALLATION
7
FIGURE 1-5. Sensor to Transmitter Switch Settings
FIGURE 1-4. Fault and Security Jumper Locations
DWG. NO. REV.
40208110 B
DWG. NO. REV.
40208109 A
MODEL 2081C/T SECTION 1.0
INSTALLATION
8
FIGURE 1-6. Explosion Proof System Installation Schematic (FM)
DWG. NO. REV.
1400160 A
MODEL 2081C/T SECTION 1.0
INSTALLATION
9
MODEL 2081C/T SECTION 1.0
INSTALLATION
FIGURE 1-7. Intrinsically Safe (BASEEFA) Wiring for Model 2081C
Part 1 of 2
DWG. NO. REV.
1700294 C
Loading...