User’s Guide
TX66A / TX67A
Programmable
Temperature Transmitter
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TABLE OF CONTENTS
1.0 INTRODUCTION ....................................................................................................................................................... 1
2.0 UNPACKING AND INSTALLATION ........................................................................................................................ 1
2.1 Unpacking ................................................................................................................................................... 1
2.2 Mechanical Installation ............................................................................................................................. 1
2.21 Weather Proof/Explosion Proof Housing ............................................................................ 2
2.22 Mounting .................................................................................................................................... 2
2.3 Electrical Installation ................................................................................................................................. 3
2.31 Output Terminals ..................................................................................................................... 3
2.32 Input Terminals ........................................................................................................................ 4
3.0 TRANSMITTER OPERATION .................................................................................................................................. 5
3.1 In a Hurry? ................................................................................................................................................... 5
3.11 Factory Configuration .............................................................................................................. 5
3.12 Operation Without a Display .................................................................................................. 5
3.13 Operation With a Display ........................................................................................................ 5
4.0 CONFIGURATION USING THE TWO-LINE DISPLAY .......................................................................................... 8
4.1 Entering the Display Mode ....................................................................................................................... 8
4.2 Display Mode Configuration ..................................................................................................................... 9
4.3 Select Sensor Input ................................................................................................................................... 9
4.4 Select Units .................................................................................................................................................13
4.5 Change Zero ...............................................................................................................................................13
4.6 Change Full Scale .....................................................................................................................................14
4.7 Select Sensor Fail Safe Detection .........................................................................................................15
4.8 Select Fail Safe Reporting ........................................................................................................................15
4.9 Trim 4.0mA ..................................................................................................................................................16
4.10 Trim 20.mA ................................................................................................................................................16
4.11 Trim Display ..............................................................................................................................................17
4.12 Select Language ......................................................................................................................................18
5.0 CONFIGURATION USING THE ONE-LINE DISPLAY .........................................................................................20
5.1 Entering the Display Mode .......................................................................................................................20
5.2 Display Mode Operation ...........................................................................................................................20
5.3 Select Sensor Input ...................................................................................................................................21
5.4 Select Units .................................................................................................................................................24
5.5 Change Zero ...............................................................................................................................................24
5.6 Change Full Scale .....................................................................................................................................25
5.7 Select Sensor Fail Safe Detection ..........................................................................................................25
5.8 Select Fail Safe Reporting ........................................................................................................................26
5.9 Trim 4.0mA ..................................................................................................................................................26
5.10 Trim 20.mA ................................................................................................................................................27
5.11 Trim Display ..............................................................................................................................................27
6.0 APPLICATIONS INFORMATION ..............................................................................................................................30
6.1 Sensor Fail-Safe Detection ......................................................................................................................30
6.2 Configuration With an External Source ..................................................................................................30
6.3 For Best Measurement Accuracy ............................................................................................................31
7.0 ACCESSORIES & INFORMATION ..........................................................................................................................32
8.0 SPECIFICATIONS .....................................................................................................................................................33
9.0 WARRANTY / DISCLAIMER ......................................................................................................................................34
LIST OF ILLUSTRATIONS
DESCRIPTION
PAGE
Figure 2-1, Output Terminal Connections ................................................................................................................... 3
Figure 2-2, Input Terminal Connections ...................................................................................................................... 4
Figure 3-1, TX60-1A and TX60-2A Local Displays ...................................................................................................... 6
Figure 8-1, Intrinsic Safety Approval Drawings ......................................................................................................35,36
Figure 8-2, TX60-2A Two Line Display Configuration Flowchart ..............................................................................37
Figure 8-3, TX60-1A One Line Display Configuration Flowchart ..............................................................................39
INDEX
DESCRIPTION
PAGE
Configuration Flowcharts ......................................................................................................................................... 37, 39
Input Terminal Connections ........................................................................................................................................... 4
Intrinsic Safety Approval Drawings ...........................................................................................................................35,36
LRV and URV, Enter Value............................................................................................................................13, 14, 24, 25
Output Terminal Connections ........................................................................................................................................ 3
Output Trim ........................................................................................................................................................... 16, 26, 27
Sensor Selection ......................................................................................................................................................... 9, 21
1.0 INTRODUCTION
The TX66A / TX67A is a Programmable compatible, isolated, two-wire, transmitter that accommodates any
one of eleven types of thermocouples, six types of RTD's, millivolt or ohm inputs. The unit is precision
linearized to the measured temperature over the entire usable range of the selected sensor. This transmitter
is simple to set up and operates much like high performance analog transmitters.
The TX66A / TX67A also has numerous advanced features that are achieved through the use of digital signal
processing and micro-controller technologies. Typical of these features are the precision linearization, the
independent zero and full scale settings, digital filtering, etc. Other advanced features, such as the automatic
self diagnostics, and the exceptional stability are transparent to the user and are continuously active.
The TX66A / TX67A transmitter can also accept one of two optional plug-in displays. The TX60-1A is an
inexpensive, single line display that is intended to give a low-cost, local indication of the measured
temperature. The TX60-2A two line display will give a local indication and functions as a very easy-to-use setup tool. Both displays facilitate local configuration and ranging of the transmitter.
This manual is divided into several sections. After a brief INTRODUCTION, the section on UNPACKING AND
INSTALLATION contains much useful information for the first time installer. The section called IN A HURRY?
helps get the system operating provided the sensor and transmitter were purchased at the same time and
thus most of the set up was completed at the factory. The next two sections explain the method of
CONFIGURATION using either display. Finally, there is additional APPLICATION INFORMATION and the
TECHNICAL SPECIFICATIONS included in the sections under those headings.
The TX66A / TX67A temperature transmitter does not have any potentiometers or switches to set and there are
no user serviceable components inside the transmitter. Opening the enclosure will void the manufacturer's
warranty. All reconfiguration, re-ranging and "calibration" can be done in the field using either one of the
displays. Any of the communication methods provides reconfiguration and re-ranging capabilities without
other external calibration tools.
2.0 UNPACKING AND INSTALLATION
2.1 Unpacking
Remove the Packing List to check off the actual equipment received. If you have any questions on your
shipment, please call OMEGA Customer Service. Upon receipt of shipment, inspect the container for any
signs of damage in transit. Especially take note of any evidence of rough handling. Report any apparent
damage immediately to the shipping agent.
NOTE: The carrier will not honor any claims unless all shipping material is saved
for their examination. After examining and removing the contents, save the packing
material and carton in the event reshipment is necessary.
2.2 Mechanical Installation
Proper installation of the transmitter will assure highest performance and minimize errors of the measured
variable. The transmitter should be mounted in a location that minimizes temperature extremes, vibration and
shock. It is important to survey the area to ascertain the best location for installation. Will the location be
subjected to flooding? Is the location directly above, below or in proximity to a known high heat source? Does
the location make the transmitter unserviceable?
The installation recommendations outlined in this section are provided to act as a guideline only and cannot
cover all possible variations. The final installation must be made at the discretion and approval of the user.
Page 1
2.21 Weather Proof/Explosion Proof Housing
An optional transmitter housing is available. The NEP-TX66A is an explosion resistant housing that
accommodates a transmitter when the display option is not required.
Please note that condensation often occurs inside conduit attached to Explosion Proof housings. Care must
be taken so that liquid condensati on does not accumulate and fill the transmitter housing with liquid. While
the transmitter is sealed, we do not recommend operating it immersed in liquid. Conductive liquids across
the top of the transmitter will short the input and loop terminals. This installation problem can appear to a
control system as a transmitter failure.
2.22 Mounting
The TX66A / TX67A transmitter may be mounted on the end of a sensor, on a bulkhead, panels. Captive 8-32
machine screws are installed on the transmitter to fa cilitate installation and removal to either a housing
bottom plate, DIN-RAIL adapter, or to a mounting panel. These types of mounts provide greater flexibility in
installation and removal of the transmitter for service. In locations where extreme temperature variations are
encountered, it is strongly recommended that enclosures be provided to maintain a somewhat constant
temperature at the transmitter. Heaters or steam tracing should be provided if the ambient temperature
variations are extreme.
2.221 DIN Rail / Surface Mounting
The transmitter has two mounting holes through the body of the transmitter. These mounting holes allow the
transmitters to be attached to any flat surface by means of two bolts or screws. The transmitter is provided
with 8/32 captive screws already installed. The optional TX66-DIN DIN Rail Adapter has threaded holes in its
mounting plate for attaching the 8-32 captive screws.
2.222 Head Mounting
When the transmitter is mounted in the optional NEP-TX66A weather-resistant/explosion-resistant housing,
this housing can be attached directly to an RTD or thermocouple installed in a thermowell. The housing has
two 1/2" female NPT conduit entries. One of these can be used to mount directly onto a 1/2" male NPT
extension of sensor. Alternatively, a 1/2" union coupling can be placed between the weather-resistant housing
and the temperature sensor.
Page 2
2.3 ELECTRICAL INSTALLATION
The TX66A / TX67A has two groups of terminals. One terminal group is for the sensor input. The second
terminal group is for transmitter output. The terminals labeled “+” and “-” are the 4 to 20mA output terminals.
These are normally connected to the corresponding polarity terminals of the power supply of the current loop.
Refer to Figure 2-4 for the arrangement of the output terminal connections.
Terminals labeled "1,2,3 and 4" are used in various connections to accommodate the different sensor inputs.
Refer to Figure 2-5 for the arrangement of the input terminal connections.
NOTE
For Intrinsically Safe Applications, please refer to the Intrinsic Safety Control Drawings included in this manual on page
41.
2.31 Output Terminals
The output terminals, labeled “+” and “-”, are generally connected to a power supply having a nominal 24 Volt
DC voltage and capable of supplying 23mA for the TX66A / TX67A. The “+” and “-” terminals of the transmitter
are connected to the corresponding polarity terminals of the power supply.
Figure 2-4
−
+
NEGATIVE
POSITIVE
Output Terminal Connections
A load resistor, typically 250 ohms, may be connected in series with either terminal of the transmitter. For
Digital communications, 250 ohms must be connected in the loop. The maximum series resistance in the
circuit (including wiring lead resistance) can be calculated using the formula:
Vs - 12
Rs = ----------------0.023
The following chart gives maximum series resistance:
Page 3
Max. Series Resistance, Rs
1300 ohms
520 ohms
417 ohms
250 ohms
0 ohms
Supply Voltage, Vs
42.0 Volts
24.0 Volts
21.6 Volts
18.0 Volts
12.0 Volts
2.32 Input Terminals
See Figure 2-5 for sensor input connections. Be certain to include the proper jumpers for thermocouple
sensors and for two or three wire RTD inputs. Any sensor other than the four-wire RTD requires at least one
external jumper. A jumper is supplied with the unit and is attached to terminals 3 and 4.
Jumper = 1443
2, 3, & 4 Wire RTD
\/\/\/
\/\/\/
/\/\/\/
/
/
6448
Œ
•
Ž
•
1443
- T/C , mV +
Figure 2-5
6448
6448
Input Terminal Connections
2.321 Millivolt and Thermocouple Input
Apply signal to terminals 1 and 2. Terminal 1 is the negative and Terminal 2 is the positive. Terminals 3 and
4 must be jumpered together for proper operation as well as to prevent any build-up of electrostatic charge on
these terminals which could affect the transmitter readings.
2.322 Two-Wire RTD Input
Apply signal to terminals 1 and 3. Jumpers must be installed on terminals 1 and 2 as well as on 3 and 4 for
proper operation and to prevent any build-up of electrostatic charge on these terminals which could affect the
transmitter readings.
2.323 Three-Wire RTD Input
Apply the common legs from the RTD (generally the same color RTD leads) to terminals 1 and 2. Apply the
other signal lead to terminal 3. Terminals 3 and 4 must be jumpered together for proper operation and to
prevent any build-up of electrostatic charge on these terminals which could affect the transmitter readings.
2.324 Four-Wire RTD Input
Apply one set of the common legs from the RTD (generally the same color RTD leads) to terminals 1 and 2.
Apply the other signal lead pair to terminals 3 and 4. No jumpers should be used for a 4 wire RTD input.
Page 4
3.0 TRANSMITTER OPERATION
3.1 In a hurry?
When in a hurry, this short set of instructions and references will help get the transmitter running.
3.11 Factory Configuration
Input
Output
4.00mA
20.00mA
Sensor Fail-safe
=
=
=
=
=
Type J Thermocouple
Analog
40°F
200°F
23.00mA (High)
On special request the factory will set the transmitter to any desired configuration. Special configurations are
identified on a tag attached to the unit.
3.12 Operation Without a Display
If the unit was ordered with the standard factory configuration, the sensor required is a Type J thermocouple.
The packing slip and a tag on the unit will indicate if the unit was set up to any other customer requested
special configuration. If there is a need to change the configuration of the transmitter, or to re-range it, use
either the TX60-1A or TX60-2A Display / Keyboards and refer to the procedures described in SECTIONS 4 (for
TX60-2A) or 5 (for TX60-1A).
NOTE: Even when "In a Hurry", the use of an appropriate power supply is important.
A 24V DC supply having a current handling capacity of at least 0.1A is commonly
used. Always use a DC (direct current) supply, or suitable size battery. Never
connect the transmitter directly to 115VAC.
With the power supply off, connect the + side of the power supply to the + terminal of the transmitter. Connect
the - side of the power supply to the - terminal of the transmitter. Optionally a resistor, typically 250 ohms may
be added in series with either lead.
Connect a Type J thermocouple to the transmitter input.
Thermocouple high (+) (input terminal 2)
Thermocouple low (-) (input terminal 1)
Jumper terminals 3 & 4 together
Unlike conventional electrical wiring, on a J thermocouple the red lead is negative. This should be checked
and verified with the particular sensor to be used.
To connect other sensors to the input refer to Section 2.32 for the proper sensor connections.
The output can be monitored by connecting a milliameter in series with either of the two output terminals, or by
connecting a high impedance voltmeter across the optional 250 ohm resistor. Now turn on the power supply.
In about 5 seconds the TX66A / TX67A loop current will settle to its normal value in the range of 4 to 20mA,
unless the input terminals are open, in which case the output current will be 23.00mA. Note that for a Type J
thermocouple, if 4mA = 40 °F and 20mA = 200ºF, each additional 10 °F increases the current by 1.0mA.
3.13 Operation With a Display
If the transmitter was ordered with either display option, it will have a small local LCD display module (with two
integral buttons) plugged in to the top of the unit. Either display option can be ordered already installed on the
TX66A / TX67A transmitter. Alternately, either display can be ordered and field installed at any time.
Having the display option as part of the transmitter does not affect its operation in the analog mode and the
description of the previous section applies. However, the display option does provide some very useful local
indication of the measured temperature and other diagnostic functions. Figure 3.1 indicates the arrangement
of the display screen.
Page 5
Figure 3-1
Appearance of the Local Displays, TX60-2A and TX60-1A
In operation, the TX60-1A and TX60-2A displays both give the process temperature. The TX60-2A provides
some additional information. The TX60-1A displays the process temperature and a minus sign if applicable.
The temperature is displayed with a floating decimal point. For measured temperatures over 999.9 ° no
decimal point will be displayed. Otherwise, the TX60-1A will show one tenth degree increments. Unlike the
more capable TX60-2A display, the TX60-1A does not show the units of measurement “°C”, “°F”, “°R”, or “°K”.
If it is necessary to display the temperature units on the TX60-1A, note by hand or apply a separate label on the
face of the display.
The TX60-2A has more display capabilities. With the TX60-2A, the top display row shows the process
temperature, the units of measurement, “°C”, “°F”, “°R”, or “°K” and a minus sign if applicable. The mid portion
is an analog bar graph display showing the % of range based on the ZERO and FULL SCALE setting of the
transmitter. When power is applied the leftmost segment of the bar graph, the 0% and the 100% become
energized momentarily. If the measured temperature is below what the ZERO is set to (below LRV), then the
left arrow is energized. If the measured temperature is above the FULL SCALE setting (above URV), then the
right arrow becomes energized. The bottom portion of the TX60-2A display is capable of displaying an
alphanumeric message up to 7 characters long. In normal operation this row shows a label, which is factory
set to display “TX66A / TX67A”. Note that this display label can be programmed at the factory to any desired
message or tag up to 7 characters.
Note that the process temperature displayed on the TX60-1A and TX60-2A is the actual temperature as
measured by the transmitter, it is not affected by the analog output range settings. This is particularly useful in
startup or operation where the measured temperature is temporarily outside the normal operating range.
When the unit is first turned on, the display will show the measured temperature. It is frequently the case that
no sensor is connected when the transmitter is first turned on. In this case, the display will show a sensor
failure. In the event of a sensor or transmitter failure, the indication on the TX60-1A display changes to read:
FAIL
SAFE
The words "FAIL" and "SAFE" will alternate in the display window to let you know that a failure condition has
occurred.
Page 6
In the event of a sensor or transmitter failure, the indication on the bottom line of the TX60-2A display also
changes to
0% gggggggggggggg
FAIL
100%>
0%-gggggggggggggg
100%>
SAFE
The words "FAIL" and "SAFE" will alternate in the display window to let you know that a failure condition has
occurred. The Percent of Output Bar Graph will indicate the output level of the transmitter. If the transmitter
Failsafe Report value is set to “Fail High” (23mA), the display will be as shown, at over 100% of output. If the
Failsafe Report is set to “Fail Low” (3.8mA), the Percent of Output Bar Graph would indicate the output level at
under 0% of output. See sections 4.8 or 5.8 for further information on setting Failsafe Reporting.
Once the proper sensor is connected the fault message on the display should clear and the transmitter
output should go to the proper value.
Both LCD displays take full advantage of the precision of these transmitters. The digital display of
measurement does not include the small D/A error otherwise present in the analog output. It provides highly
accurate local indication of the measurement, local fault diagnostics, and transmitter identification. The LCD
continues to display the measured temperature even if it is beyond the zero and full scale limits set for the
analog output. The value of this display as a set-up, calibration and reconfiguration tool may even be greater,
as will be seen in later chapters.
If you should desire to change the sensor input or to re-range or reconfigure the transmitter, please refer
to Sections 4 or 5 of this manual, which show you how to set-up the transmitter with the TX60-1Aor
TX60-2A displays.
Page 7
4.0 CONFIGURATION USING THE TX60-2A, TWO-LINE DISPLAY
To configure a transmitter using the DISPLAY MODE, either the TX60-1A or TX60-2A local LCD display is
required. These displays are available as an option and can be plugged into the top of the TX66A / TX67A
transmitter. The transmitter can also be purchased with these options already installed. These inexpensive
options make the reconfiguration, or re-ranging of the transmitter very simple and easy to follow. Without the
use of a calibrator, or any other tools, the transmitter can be set up for a different sensor, or the new range
limits can be set much like one would set the time on a digital watch.
In the event that the TX60-1A or TX60-2A Display / Keyboard are not purchased at the same time as the
transmitter, the one piece display design allows for easy field installation by simply plugging the TX60-1A or
TX60-2A into the top of the transmitter.
4.1 Entering the Display Mode
To start the DISPLAY MODE, first connect the transmitter to an appropriate DC power supply. Typically a 24VDC
supply is connected with the + side of the power supply connected to the transmitter’s output “+” terminal and side of the power supply connected to the transmitter’s output “-” terminal. A series resistor in the loop is
optional. A sensor may be connected to the transmitter’s input terminals, but this is not required for setting up
the transmitter.
With the standard factory set-up and no sensor connected, the TX60-2A display will give the following
indication:
0% gggggggggggggg
100%>
FAIL
0%-gggggggggggggg
100%>
SAFE
The transmitter is alternating the words FAIL SAFE, since no sensor is connected, and the analog output is
indicating greater than 100%, loop current at 23.00mA, which is the standard Failsafe report condition. Please
note that the display / keyboards can be plugged into the transmitter while the transmitter is powered up.
There is no need to disconnect power before plugging the TX60-1A or TX60-2A into the TX66A / TX67A.
Press the key marked NEXT. The display starts to alternate asking if the user wishes to return to the Operate
Mode?
RETURN
TO
OPERATE
MODE
?
To activate the NEXT and ENTER keys, a slow, deliberate push of the key is required. This prevents any casual,
inadvertent activation of the transmitter into one of the configuration modes.
The answer would be “No”, therefore, press the NEXT key. This will enter you n
i to the DISPLAY MODE
configuration menu. If you wish to answer a question “Yes”, press the ENTER KEY . A flow chart summarizing the
operation of the DISPLAY MODE appears at the end of this manual.
Note that when more than seven characters are required to describe a function, the display keeps sequencing
through two or more screens or may use common abbreviations. In this manual, the sequencing of the
display is indicated by placing the two or more parts of the message adjacently. With some functions, the
TX60-2A display indicates a numeric value and unit of measurement on the top line of the display in addition to
the message on the lower display line.
Page 8
4.2 Display Mode Configuration
The DISPLAY MODE will allow the user to do the following:
•
Select a Sensor Input (SELECT INPUT)
•
Select a desired temperature unit, such as ºF (SELECT UNITS)
•
Change the 4mA Lower Range Value (CHANGE ZERO)
•
Change the 20mA Full Scale Value (CHANGE FULL SCALE)
•
Change the Sensor Fail Safe detection (SELECT SENSOR FAIL SAFE)
•
Change the Fail Safe reporting (SELECT FAIL SAFE REPORT)
•
Trim the 4.0mA output current (TRIM 4 MA)
•
Trim the 20.0mA output current (TRIM 20 MA)
•
Trim the display value (TRIM DISPLAY )
Each of these functions is presented in sequence on the LCD display. If the indicated function need not be
performed, press NEXT, and the next function is displayed on the screen. To perform any function press the
ENTER key. This will cause additional screens to be displayed which enable you to perform the function.
These are described in detail below and summarized on the TX60-2A Two-Line Display / Keyboard Flowchart
found in the rear of this manual.
4.3 Select a Sensor Input
The SELECT SENSOR is the first function in the sequence. Virtually any thermocouple, RTD or millivolt input can
be selected. The display will read as follows to indicate this position on the menu:
SELECT
INPUT ?
If the sensor is set correctly, press NEXT and skip to Section 4.4 of this manual; otherwise press ENTER . After
pressing the ENTER key, the display will change to:
T/C J
Indicating that the transmitter is set to a Type J thermocouple input. If this is the desired sensor, then press
ENTER , otherwise press NEXT repeatedly to sequence through the available sensors. Each time NEXT is
pressed, the next available sensor selection is displayed.
Press the NEXT key to go the next sensor
T/C K
Press the NEXT key to continue through the different sensor selections
T/C L
T/C N
Page 9
T/C R
T/C S
T/C T
T/C U
T/C SPEC
Note: The T/C SPEC or Special Thermocouple input is reserved for a special thermocouple input, should one
be desired. This Special must be ordered from the factory.
2W OHMS
2W DINP
Note: This is the 100Ω Platinum DIN Curve with α = 0.00385.
2W SAMP
Note: This is the 100Ω SAMA Platinum Curve, known variously as the SAMA RC21-4 or SAMA PR-279.
Constants are 98.13Ω @ 0°C, α=0.003923.
Page 10
2W SPEC
Note: The 2W SPEC or Special 2 wire RTD input is reserved for a special RTD input, should one be desired.
Any special 2-wire RTD curve must be ordered from the factory.
3W OHMS
3W DINP
Note: This is the 100Ω Platinum DIN Curve with α = 0.00385.
3W SAMP
Note: This is the 100Ω SAMA Platinum Curve, known variously as the SAMA RC21-4 or SAMA PR-279.
Constants are 98.13Ω @ 0°C, α=0.003923.
3W SPEC
Note: The 3W SPEC or Special 3 wire RTD input is reserved for a special RTD input, should one be desired.
Any special 3-wire RTD curve must be ordered from the factory.
4W OHMS
4W DINP
Note: This is the 100Ω Platinum DIN Curve with α = 0.00385. This sensor will give superior measurement
results in most real-world situations where the measured temperature is under 1,000ºF.
4W SAMP
Note: This is the 100 Ω SAMA Platinum Curve, known variously as the SAMA RC21-4 or SAMA PR-279.
Constants are 98.13Ω @ 0°C, α=0.003923.
Page 11
4W SPEC
Note: The 4W SPEC or Special 4 wire RTD input is reserved for a special RTD input, should one be desired.
Any special 4-wire RTD must be ordered from the factory.
MV
HHTONLY
Note: The HHTONLY is for a Hand-Held set-up. This is used for Factory set-up only.
T/C B
T/C C
T/C E
Pressing NEXT key again returns you to the J thermocouple selection. Repeated pressing of NEXT key will
again cycle you through the input selection submenu. You can stop at any one of the thermocouple, RTD or
mV selections by pressing the ENTER key. This action changes the transmitter mode to that sensor. If no
sensor change is desired, then, without sequencing through the various sensor options, but just pressing the
ENTER key will allow one to confirm the sensor selection and leave it unchanged. Assume that the sensor is
left as T/C J. After pressing ENTER the display will return to the main menu entry of SELECT INPUT. Pressing the
NEXT key then takes the transmitter to the next main menu selection.
Page 12
4.4 Select Units
If the selected sensor is a thermocouple or RTD, the next menu entry is SELECT UNITS.
SELECT
UNITS?
Pressing the ENTER key displays the current units
DEG F
By repeatedly pressing the NEXT key, the display will sequence through the following screens:
DEG R
DEG K
DEG C
These correspond to K=Kelvin, R=Rankine, C=Celsius and F=Fahrenheit. Stopping the selection at any one
of these units and then pressing ENTER will set the transmitter to the corresponding new units. For the
purposes of this example the units of measure can be left at DEG F by pressing ENTER . Advancing the menu
selection with the NEXT key lets you change the zero.
4.5 Change Zero
The display will then alternate between the following screens to indicate that one may now change the zero, or
4mA output point. The numeric value seen on the upper portion of the screen is the ZERO value of the
transmitter. One can now change this ZERO, or LOWER RANGE VALUE, (LRV), totally independent of the FULL
SCALE, or UPPER RANGE VALUE, (URV), without the use of any calibrators or external sensor inputs.
40.0°F
CHANGE
40.0°F
ZERO ?
To change the ZERO, press ENTER . The display changes to read:
0040.0°F
PLUS ?
indicating that the existing ZERO is set to "plus" 0040.00ºF. The question mark “?” indicates a question asking
if this value is to remain positive (PLUS ?). By repeatedly pressing the NEXT key the display will alternate:
-0040.0°F
MINUS ?
0040.0°F
PLUS ?
Page 13
After deciding whether the ZERO value, LRV, is to remain positive (PLUS), press the ENTER key. In this example
assume it is to remain positive. The display changes to read:
0040.0°F
THOUSN?
and the leftmost digit position will start blinking (shown here in italics) a sking if the thousands position needs
to be changed. To change the thousands position, start pressing the NEXT key and the leftmost digit will
increment through 1 2 3 4 5 6 7 8 9 0. Stop pressing the NEXT key at the desired numeral, then press ENTER to
accept the selection. If the numeral selected before pressing ENTER was 0, then the display would change to
read:
0040.0°F
HUNDRD?
and the second digit from the left will start blinking (shown here in italics) asking if the hundreds position
needs to be changed. As before, to change the number in this digit position repeatedly press the NEXT key
until the desired numeral is reached. Then press ENTER to go to the next lower significant digit position. Each
time the NEXT key cycles through the ten choices for that digit position and the ENTER key enters the selected
number. The digit position being changed is the one that is blinking. The legend on the display will change
successively to read:
0040.0°F
T ENS?
0040.0°F
ONES?
0040.0°F
TENTHS?
After the tenth’s digit position has also been changed to the desired value, the next pressing of the ENTER key
returns the transmitter to the alternating display of CHANGE ZERO. Since changing of the zero has just been
completed, press the NEXT key to proceed to the next menu selection, CHANGE FULL SCALE.
4.6 Change Full Scale
200.0°F
CHANGE
200.0°F
FULL
200.0°F
SCALE ?
To change the full scale value press ENTER . The procedure for selecting Plus or Minus is identical to that
described for changing the ZERO. Similarly, the procedure for changing each of the digit positions is identical
to that described for changing the ZERO. Once the steps of changing the FULL SCALE have been completed and
the ENTER key is pressed at the end of the procedure, the display returns to CHANGE FULL SCALE. Press NEXT for
the next function SELECT SENSOR FAIL SAFE DETECTION .
Page 14
4.7 Select Sensor Fail-Safe Detection
SELECT
SENSOR
FAIL
SAFE ?
If you want to change the SENSOR FAIL SAFE detection press ENTER . The present status of the SENSOR FAIL SAFE
is displayed. It is recommended that one turns off the Sensor failsafe System when using the TX66A / TX67A
with an input simulator. It should then be turned on when reconnecting the transmitter to the actual sensor.
ON
OFF
When the desired fail-safe condition is displayed, pressing the ENTER key will change to the new setting and
the screen returns to the SELECT SENSOR FAIL SAFE display. Pressing the NEXT key will bring up the FAIL SAFE
REPORTING selection screen.
4.8 Select Fail-Safe Reporting
SELECT
FAIL
SAFE
REPORT?
Fail-safe reporting allows the transmitter to change the 4-20mA loop to indicate a failure condition. This failure
may be a sensor failure or a transmitter failure. In any event, the user may select to drive the loop to 23.0mA,
corresponding to the “HI” selection; or 3.6mA, corresponding to the “LO” selection or to turn the function “OFF”.
HIGH?
OFF?
LOW?
Page 15
4.9 Trim 4.0mA
TRIM
4 MA ?
This allows trimming of the 4.00mA output current.
Note: This function is only for the purpose of adjusting the 4.00mA limit of the
transmitter loop current to be exactly 4.00mA according to the plant's local standard.
This is NOT for the purpose of ranging the transmitter!
If trimming the 4.00mA limit is still desired then press ENTER . The transmitter will now output a milliamp
current equal to its internally set 4mA. This 4mA value should be read on an external meter and compared to
a local standard. It is advisable to use a very good voltmeter to make these comparisons. It is very possible
that the transmitter will be more accurate than a great many voltmeters. In this case, trimming will make the
transmitter less accurate rather than more accurate!
Once trimming the 4.00mA value has been selected, the display will alternate as follows:
RAISE
MA OUT ?
By pressing the NEXT key the display then alternates:
LOWER
MA OUT ?
When it is decided whether to raise or lower the output current, then press ENTER and the display changes to
one of the following depending on whether the raise or lower function h as been selected.
NEXT=+
NEXT=-
Now every time the NEXT key is pressed, the display blinks, and the 4.0mA output limit decreases (-), or
increases (+). The decrease or increase is in approximately 3.5 micro ampere increments.
Note: The 4.00mA limit is factory calibrated to a precision standard. Using the Output Trim function
voids the NIST traceability of calibration. Do not arbitrarily trim the output unless a qualified and
accurate local standard is available to measure the adjusted 4.00mA output! Also note that the
4.0mA limit should not be trimmed by more than about ±50µA, or transmitter operation may be
impaired.
Once the desired trim is reached, pressing ENTER will return to one of the corresponding TRIM 4MA screen. At
this point one may still go back and do further trimming of the 4.0mA limit by pressing the ENTER key, or
pressing the NEXT key changes to the next function.
4.10 Trim 20.0 mA
TRIM
20 MA ?
Trimming of the 20.0mA current limit is done in exactly the same manner as was described for trimming the
4.0mA point. The same precautions apply. After completing the trim 20.0mA pressing the NEXT key brings up
the display trim.
Page 16
4.11 Trim Display
The display trim allows the display to be trimmed by a desired offset amount. The transmitter display will
display its value based upon its internal standards. It is often desirable to alter this display to make it agree
with another external instrument at a critical measurement point. If this is desirable, the display can be
trimmed. The display trim operates as a zero shift. It shifts the display readings by the same amount at every
point. Multiple point corrections up to 22 points are possible from the factory.
Note : If a multiple point calibration curve is entered by the factory, the TRIM DISPLAY function will not appear
as a menu option in DISPLAY MODE.
You can enter a single point offset to the display. Be certain before making a display trim correction that you
have made good electrical connections to the transmitter and the sensor. In the 2 or 3 wire RTD input, or
thermocouple input modes, it is possible to produce an error of a few degrees with a fraction of an ohm in any
one of the connections. Please be careful when tightening down the input connections. These can be e asily
broken if alot of torque is applied. The idea is to make a good electrical connection without breaking the
connections. When you press the ENTER key the display changes to:
0.0F
TRIM
0.0F
DISPLY?
You can now enter an offset to the display. Suppose that the display reads 530ºF, at a time when an external
device that you want to agree with reads 525ºF. You would then want to enter a -5ºF offset in the display trim.
This is done exactly the same way as setting the zero and full-scale values.
The numeric value seen on the upper portion of the screen is the existing Display Trim Value. Normally this is
set to zero. One can now change this Offset totally independent of the ZERO, or LowER RANGE VALUE, (LRV) or
the FULL SCALE, or UPPER RANGE VALUE, (URV), without the use of any calibrators or external sensor inputs. To
change the display offset, press ENTER . The display changes to:
0.0°F
PLUS ?
indicating that the existing OFFSET is set to "plus" 0000.0ºF. The question mark “?” indicates a question asking
if this value is to remain positive (PLUS ?). By repeatedly pressing the NEXT key the display will alternate
-0000.0°F
MINUS ?
0000.0°F
PLUS ?
After deciding whether the OFFSET VALUE is to become negative (MINUS), press the ENTER key. In this example
the offset is assumed to be negative and a minus sign will be carried through this example. The display then
changes to read:
-0000.0°F
THOUSN?
The leftmost digit position will start blinking (shown here in italics) asking if the thousands position needs to
be changed. To change the thousands position, start pressing the NEXT key and the leftmost digit will
increment through 1 2 3 4 5 6 7 8 9 0. Stop pressing the NEXT key at the desired numeral, then press ENTER to
accept the selection. If the numeral selected before pressing ENTER was 0, then the display would change to
-0000.0°F
HUNDRD?
Page 17
and the second digit from the left will start blinking (shown here in italics) asking if the hundreds position
needs to be changed. As before, to change the number in this digit position repeatedly press the NEXT key
until the desired numeral is reached. Then press ENTER to go to the next lower significant digit position. Each
time the NEXT key cycles through the ten choices for that digit position and the ENTER key enters the selected
number. The digit position being changed is the one that is blinking. The legend on the display will change
successively to:
-0000.0°F
TENS?
-0000.0°F
ONES?
-0005.0°F
TENTHS?
After the tenths digit position has also been changed to the desired value, the next pressing of the ENTER key
returns the transmitter to the alternating display of TRIM DISPLAY. Since changing of the offset value has just
been completed, press the NEXT key to proceed to the next menu selection. Note, if trimming the transmitter to
external devices is desirable, it may be necessary to trim the 4 and 20mA output after setting the display
offset. After completing the trim display function, pressing the NEXT key brings up Select Language.
4.12 Select Language
SELECT
LANGU-
AGE
?
The Select Language function allows the user to configure the transmitter in any of four different languages.
English, German, French and Spanish language menu options are available. When you press the ENTER key
the display changes to:
ENGLISH
indicating that the current language setting is for English. By pressing the NEXT key the display changes to
DEUTSCH
read:
By repeatedly pressing the NEXT key, the display will sequence through the following screens:
FRENCH
Page 18
ESPANOL
ENGLISH
After deciding which language you would like the transmitter to be set for, press the ENTER key. The display
then changes to read:
RETURN
TO
OPERATE
MODE
?
If all of the set-up and re-ranging operations have been satisfactorily completed, then pressing ENTER will
return the transmitter to the normal operate mode. Pressing the NEXT key at this point will return the display to
the first screen in the sequence, SELECT INPUT.
Note again, that whenever the transmitter is in the display set-up mode, if no activation of the pushbuttons
occur for approximately 2½ minutes, the transmitter returns to the operate mode. One can also return to the
operate mode at any point while in the DISPLAY MODE by removing power from the transmitter for about 10
seconds, then reapplying power.
Page 19
5.0 CONFIGURATION USING THE TX60-1A, ONE-LINE DISPLAY
To configure a transmitter using the DISPLAY MODE, either the TX60-1A or TX60-2A local LCD display is
required. These displays are available as an option and can be plugged into the top of the TX66A / TX67A
transmitter. The transmitter can also be purchased with these options already installed. These inexpensive
options make the reconfiguration, or re-ranging of the transmitter very simple and easy to follow. Without the
use of a calibrator, or any other tools, the transmitter can be set up for a different sensor, or the new range
limits can be set much like one would set the time on a digital watch.
In the event that the TX60-1A or TX60-2A Display / Keyboard are not purchased at the same time as the
transmitter, the one piece display design allows for easy field installation by simply plugging the TX60-1Aor
TX60-2A into the top of the transmitter.
5.1 Entering the Display Mode
To start the DISPLAY MODE, first connect the transmitter to an appropriate DC power supply. Typically a 24VDC
supply is connected with the “+” side of the power supply connected to the transmitter’s output “+” terminal and
the “-“ side of the power supply connected to the transmitter’s output “-” terminal. A series resistor in the loop
is optional. A sensor may be connected to the transmitter’s input terminals, but this is not required for setting
up the transmitter.
With the standard factory set-up and no sensor connected, the TX60-1A display will give the following
indication:
FAIL
SAFE
The transmitter is indicating a fault. This would be the proper indication, since there is no sensor connected.
The analog output would indicate greater than 100% (loop current at 23.00mA), which is the standard over
range condition. If the proper sensor were connected to the transmitter, the display would indicate the
sensor’s temperature. Please note that the display / keyboards can be plugged into the transmitter while the
transmitter is powered up. There is no n eed to disconnect power before plugging the TX60-1A or TX60-2A into
the TX66A / TX67A.
Press the key marked NEXT to begin scrolling through the DISPLAY MODE menus.
9900
The 9900 code corresponds to the Return to Operate Mode function. At this point, assuming one does not
want to return to the operate mode, the answer should be no, therefore, press the key marked NEXT. Pressing
the key marked ENTER at this point will return the transmitter to the operate mode.
5.2 Display Mode Operation
The one-line, TX60-1A display will allow the user to do the following in a manner similar to the two-line display.
•
Select a Sensor Input (SELECT INPUT)
•
Select a desired temperature unit, such as ºF or ºC (SELECT UNITS)
•
Change the 4mA Lower Range Value (CHANGE ZERO)
•
Change the 20mA Full Scale Value (CHANGE FULL SCALE)
•
Change the Sensor Fail Safe detection (SELECT SENSOR FAIL SAFE)
•
Change the Fail Safe reporting (SELECT FAIL SAFE REPORT)
•
Trim the 4.0mA output current (TRIM 4 MA)
•
Trim the 20.0mA output current (TRIM 20 MA)
•
Trim the display value (TRIM DISPLAY )
Each of these functions is presented with a code in a prescribed sequence on the LCD display. If the
indicated function need not be performed, press NEXT, and the next function will be displayed on the screen.
To perform any function press the ENTER key. This will cause additional screens to be displayed which enable
you to perform the function. These are described in detail below and summarized in the TX60-1A One-Line
Display / Keyboard Flowchart found at the rear of this manual.
Page 20
5.3 Select a Sensor Input
The SELECT INPUT is the first function in the sequence. Virtually any thermocouple, RTD or millivolt input can be
selected. The display will read as follows to indicate this position on the menu:
9000
The factory default sensor input is a J thermocouple. If the sensor does not require changing, then press
NEXT, and skip to Section 5.4 of this manual; otherwise press ENTER . After pressing the ENTER key, the display
will change to:
9004
Indicating that the transmitter is set to a Type J thermocouple input. If this is the desired sensor, then press
ENTER , otherwise press NEXT repeatedly to sequence through the available sensors. Each time NEXT is
pressed, the next available sensor selection is displayed.
9004
The 9004 Code corresponds to a J thermocouple.
9005
The 9005 Code corresponds to a K thermocouple.
9006
The 9006 Code corresponds to an L thermocouple.
9007
The 9007 Code corresponds to an N thermocouple.
9008
The 9008 code corresponds to an R thermocouple.
9009
The 9009 code corresponds to an S thermocouple.
9010
The 9010 code corresponds to a T thermocouple.
9011
The 9011 code corresponds to a U thermocouple.
Page 21
9012
Note: The 9012, T/C SPEC or Special Thermocouple input is reserved for a special thermocouple input,
should one be desired. This special curve must be ordered from the factory.
9013
The 9013 code corresponds to a 2 -wire ohm input.
9014
The 9014 code corresponds to a 2 -wire 100 Ω DIN curve platinum RTD with an α = 0.00385.
9015
The 9015 code is the 2-wire 100Ω SAMA Platinum Curve, known variously as the SAMA RC21-4 or SAMA
PR-279.
9016
The 9016 code is reserved for a Special 2 wire RTD, should one be desired. Any special 2-wire RTD curve
must be ordered from the factory.
9017
The 9017 code is for 3-wire Ohms.
9018
The 9018 code is for a 3 -wire 100Ω DIN curve RTD with α = 0.00385. This is the most commonly used RTD in
industrial applications.
9019
The 9019 code is the 3-wire 100Ω SAMA Platinum Curve, known variously as the SAMA RC21-4 or SAMA PR279.
9020
The 9020 code for the Special 3 wire RTD input is reserved for a special RTD input, should one be desired.
Any special 3-wire RTD curve must be ordered from the factory.
Page 22
9021
The 9021 code is for a 4 wire Ohm input.
9022
The 9022 code is for a 4-wire 100Ω DIN curve Platinum RTD with α = 0.00385. This sensor will give superior
measurement results in most real-world situations where the measured temperature is under 1,000ºF.
9023
The 9023 code is the 4-wire 100Ω SAMA Platinum Curve, known variously as the SAMA RC21-4 or SAMA PR279.
9024
Note, the 9024 code is for Special 4 wire RTD input is reserved for a special RTD input, should one be
desired. Any special 4-wire RTD curve must be ordered from the factory.
9025
The 9025 code corresponds to a millivolt input.
9026
The 9026 code corresponds to an input known as the "HHTONLY". This is reserved for a Hand-Held set-up at
the factory only.
At this point, the menus recycle to the top and begin with the first sensor input.
9001
The 9001 code corresponds to a B type thermocouple.
9002
The 9002 code corresponds to a C type thermocouple.
9003
The 9003 code corresponds to an E type thermocouple.
You can stop at any one of the thermocouple, RTD or mV selections by pressing the ENTER key. This action
changes the transmitter mode to that sensor. If no sensor change is desired, then, without sequencing
through the various sensor options, but just pressing the ENTER key will allow one to confirm the sensor
selection and leave it unchanged. Assume that the sensor is left as T/C J. After pressing ENTER the display
will return to the main menu entry of SELECT INPUT. Pressing the NEXT key then takes the transmitter to the next
main menu selection .
Page 23
5.4 Select Units
If the selected sensor is a thermocouple or RTD, the next menu entry is SELECT UNITS. You will not see this
selection if an ohms or mV input selection is made.
9100
The code 9100 corresponds to the SELECT UNITS entry in the main menu. Pressing the ENTER key takes you to
this section of the menu. This screen indicates that the transmitter is currently set to degrees F. Pressing the
NEXT key, the display will sequence through the following screens:
9133
The 9133 code corresponds to units of Degrees Fahrenheit.
9134
The 9134 code corresponds to units of Degrees Rankine.
9135
The 9135 code corresponds to units of Degrees Kelvin.
9132
The 9132 code corresponds to units of Degrees Centigrade.
Stopping the selection process on the TX60-1A display at any one of these units and then pressing ENTER will
set the transmitter to the corresponding new units. For the purposes of this example the units of measure can
be left at DEG F by pressing ENTER . Pressing the NEXT key will bring you to the next section of the menu,
changing the Zero.
5.5 Change Zero (Lower Range Value)
The display will then read as follows to indicate that one may now change the zero, or 4mA output point.
9200
The code 9200 indicates that one can now change this ZERO, or LOWER RANGE VALUE (LRV), totally independent
of the FULL SCALE, or UPPER RANGE VALUE, (URV), without the use of any calibrators or external sensor inputs.
To change the ZERO, press ENTER . The display changes to:
9201
The 9201 code indicates that a positive, or "plus", number is selected for the 4 mA (LRV) output point. By
repeatedly pressing the NEXT key the display will alternate:
9202
9201
The 9202 code corresponds to a negative number to be selected for the 4mA output point. After deciding
whether the ZERO value, or LRV, is to remain positive (PLUS), press the ENTER key. In this example assume it
is to remain positive. The display changes to read:
Page 24
0040
and the leftmost digit position will start blinking (shown here in italics) asking if the thousands position needs
to be changed. To change the thousands position, start pressing the NEXT key and the leftmost digit will
increment through 1 2 3 4 5 6 7 8 9 0. Stop pressing the NEXT key at any of the numerals desired, then press
ENTER to accept the selection. If the numeral selected before pressing ENTER was 0, then the display would
change to read:
0040
The second digit from the left will start blinking (shown here in italics) asking if the hundreds position needs to
be changed. As before, to change the number in this digit position repeatedly press the NEXT key until the
desired numeral is reached. Then press ENTER to go to the next lower significant digit position. Each time the
NEXT key cycles through the ten choices for that digit position and the ENTER key enters the selected number.
The digit position being changed is the one that is blinking. The legend on the display will change
successively to read:
0040
0040
After the one’s digit position has also been changed to the desired value, the next pressing of the ENTER key
returns the transmitter to the alternating display of CHANGE ZERO. Since changing of the zero has just been
completed, press the NEXT key to proceed to the next menu selection, CHANGE FULL SCALE.
5.6 Change Full Scale (Upper Range Value)
9300
The code 9300 corresponds to selection CHANGE FULL SCALE, or UPPER RANGE VALUE (URV). To change the full
scale value press ENTER . The procedure for selecting Plus or Minus is identical to that described for changing
the ZERO, with the code 9301 corresponding to a positive (+) number and the code 9302 corresponding to a
negative (-) number. The procedure for changing each of the digit positions is identical to that described for
changing the ZERO. Once the steps of changing the FULL SCALE have been completed and the ENTER key is
pressed at the end of the procedure, the display returns to CHANGE FULL SCALE. Press NEXT for the next function
SELECT SENSOR FAIL SAFE DETECTION .
5.7 Select Sensor Fail Safe Detection
9400
The code 9400 corresponds to selecting the SENSOR FAIL-SAFE detection. If one desires to change the SENSOR
FAIL SAFE detection then press ENTER . The present status of the Sensor Fail-safe is displayed. It is
recommended that one turns off the Sensor fail-safe when using the TX66A / TX67A with an input simulator. It
should then be turned on when reconnecting the transmitter to the actual sensor.
9401
The code 9401 indicates that the sensor fail-safe detection is turned on.
9402
The code 9402 indicates that the sensor fail-safe detection is turned off. When the desired fail-safe condition
is displayed, pressing the ENTER key will change to the new setting and the screen returns to the SELECT
SENSOR FAIL SAFE display, code 9400. Pressing the NEXT key will then bring up the FAIL SAFE REPORT selection
screen.
Page 25
5.8 Select Fail Safe Reporting
The code 9500 indicates the main menu entry for setting the transmitter FAIL-SAFE REPORT. Pressing the ENTER
key will bring up the following code:
9501
The code 9501 corresponds to instructing the transmitter to output 3.6mA under a fail-safe condition.
Pressing the ENTER key at this point sets the fail-safe LOW. Pressing the NEXT key brings up the following
screen:
9502
The code 9502 corresponds to instructing the transmitter to output 23.0mA under a fail-safe condition.
Pressing the ENTER key at this point sets the fail-safe HIGH. Pressing the NEXT key brings up the following
screen:
9503
The code 9503 corresponds to instructing the transmitter to not report a fail-safe condition. Pressing the
ENTER key at this point turns off this reporting. Pressing the NEXT key brings up the next function, TRIM 4 MA.
5.9 Trim 4.0mA
The code 9600 indicates the main menu entry for performing an 4 MA OUTPUT TRIM. Pressing the ENTER key will
bring up the following code.
9600
This function will trim the 4.00mA output current of the transmitter.
Note: The 4.00mA limit is factory calibrated to a precision standard. Using the Output Trim function
voids the NIST traceability of calibration. Do not arbitrarily trim the output unless a qualified and
accurate local standard is available to measure the adjusted 4.00mA output! Also note that the
4.0mA limit should not be trimmed by more than about ±50µA, or transmitter operation may be
impaired.
If trimming the 4.00mA limit is still desired then press ENTER . The transmitter will now output a milliamp
current equal to its internally set 4mA. This 4mA value should be read on an external meter and compared to
the plant standard. It is advisable to use a very good voltmeter to make these comparisons. It is very possible
that the transmitter will be more accurate than a great many voltmeters. In this case, trimming will make the
transmitter less accurate rather than more accurate!
Page 26
Once trimming the 4.00mA value has been selected, the display will show:
9601
The code 9601 corresponds to selecting the function to raise mA output.
Pressing the NEXT key the display then shows:
9602
The code 9602 corresponds to selecting the function to lower the mA output. Comparing the transmitter
output to the external device will allow you to decide whether to raise or lower the milliamp value. When it is
decided whether to raise or lower the output current, then press ENTER and the display changes to one of the
following depending on whether the raise or lower function has been selected.
9610
9620
(raises output)
(lowers output)
The code 9610 confirms that you are in the Raise 4mA output trim function. Each time the NEXT key is
pressed, the display blinks, and the 4.0mA output limit increases (+). The increase is in approximately 3.5
micro-ampere increments. The code 9620 confirms that you are in the Lower 4mA output trim. Each time the
NEXT key is pressed, the display blinks, and the 4.0mA output limit decreases (-). The decrease is in
approximately 3.5 micro-ampere increments.
Note: The 4.00mA limit is factory calibrated to a precision standard. Using the Output Trim function
voids the NIST traceability of calibration. Do not arbitrarily trim the output unless a qualified and
accurate local standard is available to measure the adjusted 4.00mA output! Also note that the
4.0mA limit should not be trimmed by more than about ±50µA, or transmitter operation may be
impaired.
Once the desired trim is reached, pressing ENTER will return to the corresponding TRIM 4MA screen. At this
point one may still go back and do further trimming of the 4.0mA limit by pressing the ENTER key, pressing the
NEXT key changes to the next function.
5.10 Trim 20mA
The code 9700 indicates the main menu entry for setting the performing a 20MA OUTPUT TRIM. Pressing the
ENTER key will bring up the following code:
9700
This function will trim the 20.00mA output current of the transmitter.
Trimming of the 20.0mA current limit is done in exactly the same manner as was described for trimming the
4.0mA point. Similarly the same precautions apply. The code 9701 corresponds to selecting the function to
raising the mA output. The code 9702 corresponds to selecting the function to lower the mA output. The code
9710 confirms raising the 20mA output by approximately 3.5 micro-ampere increments with each push of the
NEXT key. The code 9720 confirms lowering the 20mA output by approximately 3.5 micro-ampere increments
with each push of the NEXT key. After completing the trim 20.0mA pressing the NEXT key brings up the TRIM
DISPLAY menu.
5.11 Trim Display
The display trim allows the display to be trimmed to a desired point. The transmitter's TX60-1A or TX60-2A
display will show its value based upon the transmitter's current settings. It is often desirable to alter the
display to make it agree with another instrument at a critical measurement point. If this is desirable, the
display can be trimmed. The display trim operates as a zero shift and shifts the display readings by the same
amount at every point. Multiple point corrections up to 22 points are available from the factory.
Page 27
Note : If a multiple point calibration curve is entered by the factory, the TRIM DISPLAY function will not appear
as a menu option in DISPLAY MODE.
You can enter a single point offset to the display. Be certain before making a display trim correction that you
have made good electrical connections to the transmitter and the sensor. In the 2 or 3 wire RTD input, or
thermocouple input modes, it is possible to produce an error of a few degrees with a fraction of an ohm in any
one of the connections. Please be careful when tightening down the input connections. These can be easily
broken if alot of torque is applied. The idea is to make a good electrical connection without breaking the
connections.
The display trim allows you to enter an offset correction. For example, suppose that the display reads 530ºF,
at a time when an external device that you want to agree with reads 525ºF. You would then want to enter a -5ºF
offset in the display trim. This is done exactly the same way as setting the zero and full-scale values.
Pressing the NEXT key at this point advances the menus and the display will now read:
The 9800 code corresponds to the display trim.
9800
One can set the display trim offset by pressing the ENTER key. The display changes to:
9801
The 9801 code indicates that a "plus" number is selected for the display offset. By repeatedly pressing the
NEXT key the display will alternate:
9801
9802
the 9802 code corresponds to a negative number to be selected for the display trim point. After deciding
whether the display trim value is to remain positive (PLUS), or negative (MINUS) press the ENTER key. In this
example assume it is to be a negative offset. The display changes to:
- 000
and the leftmost digit position will start blinking (shown here in italics) asking if the hundreds position needs
to be changed. To change the hundreds position, start pressing the NEXT key and the leftmost digit will
increment through 1 2 3 4 5 6 7 8 9 0. Stop pressing the NEXT key at the desired numeral, then press ENTER to
accept the selection. If the numeral selected before pressing ENTER was 0, then the display would change to:
- 000
and the second digit from the left will start blinking (shown here in italics) asking if the tens position needs to
be changed. Pressing the ENTER key will fix the tens digit and display the ones digit:
- 000
In this example, we want to enter a -5 degree offset, so we want to cycle the “ones” digit. As before, to change
the number in this digit position repeatedly press the NEXT key until the desired numeral is reached. Then
press ENTER to go to the next lower significant digit position. Each time the NEXT key cycles through the ten
choices for that digit position and the ENTER key enters the selected number. The digit position being changed
is the one that is blinking. The legend on the display will change successively to:
- 005
After the ones digit position has been changed to the desired value, the next pressing of the ENTER key returns
the transmitter to the 9800 code. Note that since the TX60-1A will only display in whole degrees, the display
trim is limited to whole degrees. If greater display precision is required, the two-line TX60-2A display will give
you precision to the tenths of degrees. Since changing of the zero has just been completed, press the NEXT
key to proceed to the next menu selection, RETURN TO OPERATE MODE.
Page 28
9900
If all of the set-up and re-ranging operations have been satisfactorily completed, then pressing ENTER will
return the transmitter to the normal operate mode. Pressing the NEXT key at this point will return the display to
the first screen in the sequence, SELECT INPUT which corresponds to the code 9000.
Note again, that whenever the transmitter is in the display set-up mode, if no activation of the keyboard occurs
for approximately 2½ minutes, the transmitter returns to the operate mode. One can also return to the operate
mode at any point in the DISPLAY MODE by removing power from the transmitter for about 10 seconds and then
reapplying power.
Page 29
6.0 APPLICATIONS INFORMATION
6.1 SENSOR FAIL-SAFE DETECTION
The TX66A / TX67A detects a sensor failure condition by making various measurements across its sensor
input terminals. As a result of these measurements, the unit can detect an open thermocouple or open RTD
condition. In addition, the TX66A / TX67A can detect if an RTD is short circuited, or if any of its terminal wires
(2, 3, or 4-wire RTD's) are open. Any one of these conditions will cause a "FAIL-SAFE" report indication.
In the process of performing these sensor failure checks, the unit periodically passes small pulses of current
through the sensor and its connecting wires. The transmitter measures the resulting voltage drop. One of the
conditions resulting in a FAIL-SAFE reporting condition is if this voltage drop exceeds 180mV.
In the case of an RTD, the fail-safe detection is part of the normal excitation for the RTD and therefore both the
temperature measurement and some of the sensor fail-safe detection routines are done simultaneously. In
the case of a thermocouple, during the temperature measurement cycle, there is no open sensor test current
in the thermocouple. Thermocouple open circuit is detected by making a second measurem ent with the test
current through the thermocouple.
This method of testing for sensor failure has the following advantages:
1) In the case of thermocouples, there is no steady current through the sensor during measurement
and therefore accuracy is not degraded.
2) During open sensor detection, the test current is sufficiently high that even if there is some
leakage resistance between the sensor leads, an open sensor will be positively detected.
There are certain precautions to be observed when using this method of sensor failure detection. If the lead
wire resistance is too great, then a false FAIL-SAFE report could be generated. The maximum lead wire
resistance is dependent on the type of sensor being used and the maximum temperature expected to be
measured. The maximum lead resistance for an RTD is 50Ω in any one lead. For a thermocouple, the
maximum allowable resistance is 1,000Ω for a non-grounded junction Thermocouple and 10 Ω for a
grounded junction Thermocouple.
6.2 CONFIGURATION WITH AN EXTERNAL SOURCE
With an external source, the basic procedure is to set the external source to the value you require for 4mA or
20mA. Next, read the transmitter value on the TX60-1A or TX60-2A display. Record these values. Then follow
the display set-up procedure to set the 4mA and 20mA values to the values that you recorded with the external
source.
When attempting to calibrate or check the calibration of the TX66A / TX67A transmitter with an external
thermocouple or RTD calibrator, it is generally advisable to disable the "SENSOR FAIL-SAFE" feature. The
open sensor test periodically injects about 5µA of current into the input terminals, the millivolts generated by
the calibration source is periodically disturbed and depending on the characteristics of the external calibration
source used, erroneous voltages may be applied to the transmitter. The "SENSOR FAIL-SAFE" can be
disabled by turning it off in the configuration menus (Sections 4.7 & 5.7). After the calibration has been
completed, this function can be re-enabled.
6.21 Thermocouple Input
Setting the ZERO and FULL SCALE with a thermocouple sensor requires some added steps because of the
automatic cold-junction compensation. Thermocouple tables are normally available for a reference junction at
the ice point of water. These table entries must be adjusted for the actual cold-junction temperature. In the
case of the TX66A / TX67A transmitter, the cold-junction is measured with an internal calibrated thermometer.
It is generally good practice to operate the transmitter for 30 minutes or more prior to calibration to allow it to
reach thermal equilibrium.
Page 30
6.211 Calibration Using a Millivolt Source
The procedure starts with the selection of the thermocouple type. Then determine the temperature of the
thermocouple terminals on top of the transmitter. This can be done by measuring with a thermometer the
temperature of the thermocouple terminals on the transmitter. Or one can assume that the terminals are
approximately at room temperature and then determine the room temperature.
Next, locate the appropriate table of temperature versus mV for the selected thermocouple.
Find the table entry corresponding to the terminal block temperature, (mV @ TB°C)
Calculate the mV to be applied as follows:
(mV applied for LRV) = (mV @ LRV Table°C) -(mV @ TB°C)
Applying the millivolts (mV applied) to the transmitter and record the temperature displayed on the TX60-1A or
TX60-2A display for the ZERO (LRV) or 4mA value. Then record the FULL SCALE (URV) using a similar
procedure. These recorded values will then be set into the transmitter as the zero and full-scale values using
the display set-up procedure.
6.211 Calibration Using a Thermocouple Calibrator
Some of the thermocouple calibrators a vailable on the market provide a means of measuring the temperature
of the terminal block and automatically apply the corrected mV to the transmitter. This procedure is rather
simple. However, there can be an appreciable difference between the temperature of the simulator and the
transmitter terminals. With some thermocouple types, this error could be amplified 5 to 10 fold, resulting in
large measurement errors. Use caution so as not to introduce these possible errors.
6.3 FOR BEST MEASUREMENT ACCURACY
The TX66A / TX67A transmitter is a stable instrument, precision calibrated at the factory for any measurement
range the user may select. However, the automatic cold-junction compensation requires certain precautions
to obtain best accuracy when used with a thermocouple sensor.
The cold-junction compensation operates by attempting to measure accurately the temperature of the
thermocouple terminals on top of the instrument. If these terminals are exposed to thermal radiation or
convection, the cold-junction compensation will introduce an error. With certain types of thermocouples and
temperature measurement ranges, the sensitivity of the cold-junction is greater than the sensitivity of the
measurement couple. Under those conditions, a one degree error in the cold-junction temperature that the
transmitter senses can result in a greater than one degree temperature measurement error.
For best measurement accuracy with thermocouple sensors, it is advisable to shield the top terminals by
placing the transmitter into a housing or enclosure, such as the model NEP-TX66A. In addition, sufficient time
should be allowed for the housing and the transmitter to reach equilibrium temperature in a given operating
environment before best accuracy is reached.
For best accuracy with any sensor, or in the millivolt mode, it is advisable to allow the transmitter to operate
with the desired fixed input signal for a period of 30 seconds before the reading is taken. The transmitter
periodically measures certain internal references. These internal measurements and the external signal
undergo digital averaging and the full accuracy of the instrument is only achieved after several readings have
been averaged.
When using an RTD sensor, a four-wire connection is generally recommended. With a three-wire RTD the
TX66A / TX67A makes two separate measurements before calculating the temperature, whereas, only a
single measurement is required when using a four-wire RTD. Conceptually, a better accuracy is possible
using a single measurement as compared with calculating the difference of two separate measurements.
Page 31
7.0 ACCESSORIES & INFORMATION
Other accessories available from Omega are:
TX60-1A
TX60-2A
TX66-DIN
NEP-TX66A
One-line Local Display
Two-line Local Display
DIN Rail Mounting Adapter
Explosion Proof Housing (No Display Option*)
A variety of signal conditioners, thermocouples, RTD sensors and thermowells are also available.
* The TX60-1A or TX60-2A can be used for setup and configuration for transmitters installed in
NEP-TX66A housings, but cannot be installed permanently. The NEP-TX66A will not close properly with
either of these displays installed.
Page 32
Ambient Temperature Gradient: Automatic compensation to
20ºC/Hour Change
Update Time: 0.15 Seconds
Response to Step Input: 0.25 Seconds, Typical
8.0 SPECIFICATIONS
THERMOCOUPLE SENSORS:
NIST Types B, C, E, J, K, N, R, S, & T; DIN Types L & U
RTD Resistance Sensors:
100 Ω Pt DIN curve (α = 0.00385)
2, 3 or 4 Wire
100 Ω Pt SAMA RC21-4 curve (α=0.003923)
2, 3 or 4
Wire
Consult factory for the RTD choices below:
100 Ω Ni DIN curve
120 Ω Ni MINCO curve
10 Ω Cu curve
Ni SAMA
AMBIENT TEMPERATURE STABILITY: Self-correcting over the
operating temperature range. Refer to Accutech Application Note
#203 for full discussion.
MILLIVOLT INPUT RANGE: -15 to 115mVDC
THERMOCOUPLE AND RTD LINEARIZATION: Linearization with
temperature conforms to NIST & DIN curves within ±0.05ºC.
OUTPUT: Analog, Two wire 4 to 20mA
OUTPUT RANGING ADJUSTMENTS:
Analog Zero
} {100% of sensor range, non-interacting
Full Scale
} {Normal or reverse acting
100Ω Pt RTD
100Ω Pt SAMA
Ohms
AUTOMATIC DIAGNOSTICS: Every 3 seconds the TX66A
transmitter performs self-checks for zero, span, cold-junction
temperature, open T/C, open RTD element, shorted RTD element,
each open RTD lead and transmitter malfunction.
INTERCHANGEABILITY: All units interchangeable without field
calibration.
OUTPUT RESOLUTION: Analog, 3.6µA
TRANSMITTER ACCURACY:
± 0.05% of the millivolt or ohm equivalent reading, or the accuracy
from the table below, whichever is greater; plus the effect of cold
junction measurement error or ± 0.5ºC (±0.9ºF), if using a
thermocouple sensor; plus ± 0.05% of span.
Accuracy
T/C’s
T/C’s
LONG TERM STABILITY: Less than 0.05% of reading plus
±3.6µA per year.
FAILSAFE: User settable from 3.6mA to 23.0mA, or OFF
MINIMUM OUTPUT RANGE: None
E, J, K, L, N, T
B, C, R, S, U
mV
OPERATING TEMPERATURE RANGE:
-40oF to +185oF (-40oC to +85oC)
Electronics
-4oF to +158oF (-20oC to +70oC)
Display
STORAGE TEMPERATURE RANGE:
-58oF to +185oF (-50oC to +85oC)
2, 3 or 4 Wire
2, 3 or 4 Wire
2, 3 or 4 Wire
2, 3 or 4 Wire
Sensor Type
COLD JUNCTION COMPENSATION:
Self-correction to ±0.5º C
± 0.3ºC ( ± 0.5ºF)
± 0.8ºC ( ± 1.5ºF)
± 0.01 mV
EMI/RFI IMMUNITY: Less than 0.5% of reading (SAMA PMC 33.1c
test method) 20KHz to 1000MHz, 10 V/meter.
ISOLATION: 250 VAC rms or 800VDC
COMMON MODE REJECTION: 120dB
REVERSE POLARITY PROTECTION:
42 VDC applied with either polarity
POWER AND LOAD:
Supply voltage (no load resistance); 12 to 42 VDC (30 VDC for
I/S version)
Supply voltage (with load resistance);
Vsupply=(12)+(Rload in Kohm) x (23mA)
Supply Voltage Effect: < +/-0.005% of Span per Volt
± 0.14ºC ( ± 0.25ºF)
± 0.14ºC ( ± 0.25ºF)
± 0.06 Ohm
WEIGHT: 4 oz. Electronics only
Accuracy includes repeatability, hysteresis, load and ambient
temperature. For a detailed analysis refer to Accutech Technical
Application Note #203.
TRANSMITTER REPEATABILITY: One half of accuracy.
REFERENCE CONDITION ACCURACY:
Equal to transmitter repeatability, when set-up under reference
conditions to an external source. The transmitter is then
referenced to the prevailing conditions and transmitter accuracy at
this reference condition will include repeatability, linearity, and
hysteresis effects. If using a thermocouple add 0.05ºF for
reference condition accuracy cold junction effect. Reference
condition accuracy is comparable in scope to the accuracy
generally specified for analog based transmitters and is consistent
with the ANSI/ISAS51.1-1979 definition of “Accuracy”.
SPECIFICATIONS (CONTINUED)
DYNAMIC RESPONSE:
Turn On Time: Less than 5 seconds after power up
Page 33
STANDARD CONFIGURATION:
Factory configured for Type J thermocouple, 40ºF=4.0mA,
200ºF=20mA, with HI failsafes. Special configurations are
available to suit your requirements. See Price List.
It is the policy of OMEGA to comply with all worldwide safety
and EMC/EMI regulations that apply. OMEGA is constantly
pursuing certification of its products to the European New
Approach Directives. OMEGA will add the CE mark to every
appropriate device upon certification.
The information contained in this document is believed to
be correct, but OMEGA Engineering, Inc. accepts
no liability for any errors it contains, and reserves the right
to alter specifications without notice.
WARNING: These products are not designed for use in,
and should not be used for, patient-connected applications.
9.0 WARRANTY/DISCLAIMER
OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months from
date of purchase. OMEGA Warranty adds an additional one (1) month grace period to the normal one (1) year product warranty to
cover handling and shipping time. This ensures that OMEGA’s customers receive maximum coverage on each product.
If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service Department will issue an
Authorized Return (AR) number immediately upon phone or written request. Upon examination by OMEGA, if the unit is found to
be defective, it will be repaired or replaced at no charge. OMEGA’s WARRANTY does not apply to defects resulting from any action
of the purchaser, including but not limited to mishandling, improper interfacing, operation outside of design limits, improper repair, or
unauthorized modification. This WARRANTY is VOID if the unit shows evidence of having been tampered with or shows evidence of
having been damaged as a result of excessive corrosion; or current, heat, moisture or vibration; improper specification; misapplication;
misuse or other operating conditions outside of OMEGA’s control. Components which wear are not warranted, including but not
limited to contact points, fuses, and triacs.
OMEGA is pleased to offer suggestions on the use of its various products. However, OMEGA neither assumes responsibility for any
omissions or errors nor assumes liability for any damages that result from the use of its products in accordance with information
provided by OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by it will be as specified and free
of defects. OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER,
EXPRESS OR IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF
LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of OMEGA with respect to this order,
whether based on contract, warranty, negligence, indemnification, strict liability or otherwise, shall not exceed the purchase price of the
component upon which liability is based. In no event shall OMEGA be liable for consequential, incidental or special damages.
CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic Component” under 10
CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical applications or used on humans. Should any
Product(s) be used in or with any nuclear installation or activity, medical application, used on humans, or misused in any way,
OMEGA assumes no responsibility as set forth in our basic WARRANTY / DISCLAIMER language, and, additionally, purchaser will
indemnify OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the Product(s) in
such a manner.
RETURN REQUESTS / INQUIRIES
Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE RETURNING ANY
PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR) NUMBER FROM OMEGA’S
CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID PROCESSING DELAYS). The assigned AR number should then
be marked on the outside of the return package and on any correspondence.
The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent breakage in transit.
FOR WARRANTY RETURNS,
please have the following information available
BEFORE contacting OMEGA:
1. Purchase Order number under which
the product was PURCHASED,
2. Model and serial number of the
product under warranty, and
3. Repair instructions and/or specific problems
relative to the product
FOR NON-WARRANTY REPAIRS, consult OMEGA for
current repair charges. Have the following information
available BEFORE contacting OMEGA:
1. Purchase Order number to cover the
COST of the repair,
2. Model and serial number of the product, and
3. Repair instructions and/or specific problems
relative to the product.
OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible.
This affords our customers the latest in technology and engineering.
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 1999 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied, reproduced,
translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the prior written consent of
OMEGA ENGINEERING, INC.
Page 34
Figure 8-1
Intrinsic Safety Drawings
Page 35
Figure 8-1
Intrinsic Safety Drawings
Page 36
Operate Mode
Note: Pressing ENTER stores
new values in transmitter. To
escape at any point, or to retain
original values (before pressing
ENTER to accept new value):
disconnect power and wait 30
seconds. Reconnect power &
transmitter will start up in Operate
Mode.
Next
9900
Return to
Operate Mode?
Enter
Return to Operate Mode
Wait 5 seconds
TX66A / TX67A Configuration Flowchart
TX60-1A One- Line Display / Keypad
Next
9000
Select Input
Enter
9001
9002
9003
9004
9005
9006
9007
9008
9009
9010
9011
9012
9013
9014
9015
9016
9017
9018
9019
9020
9021
9022
9023
9024
9025
9026
T/C B
T/C C
T/C E
T/C J
T/C K
T/C L
T/C N
T/C R
T/C S
T/C T
T/C U
T/C Special
2 Wire Ohms
Next
2 Wire Pt DIN RTD
2 Wire Pt SAMA RTD
2 Wire Special
3 Wire Ohms
3 Wire Pt DIN RTD
3 Wire Pt SAMA RTD
3 Wire Special
4 Wire Ohms
4 Wire Pt DIN RTD
4 Wire Pt SAMA RTD
4 Wire Special
mV
HHT Only
Enter
Next
9100
Select Units
Enter
(Skipped if
Ohms or mV input)
9132 Deg C
9133 Deg F
9134 Deg R
9135 Deg K
Next
Enter
Next
Enter
Set blinking digit
NEXT increments blinking digit
ENTER sets digit
Enter
Next
Enter
Set blinking digit
NEXT increments blinking digit
ENTER sets digit
Enter
Next
Enter
Next
9200
Change
Zero (LRV)
9201 Plus?
Enter
9202 Minus?
Next
9300
Change Full
Scale (URV)
9301 Plus?
Enter
9302 Minus?
Next
9400
Select Sensor
Failsafe
9401 On?
Enter
9402 Off?
Next
9500
Failsafe Report
Enter
9501 Failsafe Low?
9502 Failsafe High?
9503 Failsafe Off?
Next
Enter
Next
Enter
9601 Raise?
9600
Trim 4mA
Enter
Next
9602 Lower?
Enter
Next
Enter
9701 Raise?
9700
Trim 20mA
Next
Enter
9702 Lower?
Enter
9610 Press NEXT to Raise mA output in
2 uA increments
----------------------------------------------------9620 Press NEXT to Lower mA output in
2 uA increments
Enter
9710 Press NEXT to Raise mA output in
2 uA increments
----------------------------------------------------9720 Press NEXT to Lower mA output in
2 uA increments
Enter
Next
9800
Trim Display
9801 Plus?
Enter
Next
Enter
9802 Minus?
Next
Figure 8-2
TX60-1A Configuration Flowchart
Page 37
Set blinking digit
NEXT increments blinking digit
ENTER sets digit
Enter
Page 38
Operate Mode
Note: Pressing ENTER stores
new values in transmitter. To
escape at any point, or to retain
original values (before pressing
ENTER to accept new value):
disconnect power and wait 30
seconds. Reconnect power &
transmitter will start up in Operate
Mode.
Next
Return to Operate
Mode?
Enter
Return to Operate Mode
Wait 5 seconds
TX66A / TX67A Configuration Flowchart
TX60-2A Two-Line Display / Keypad
Next
Select Input
Enter
T/C B
T/C C
T/C E
T/C J
T/C K
T/C L
T/C N
T/C R
T/C S
T/C T
T/C U
T/C Special
2 Wire Ohms
2 Wire Pt DIN RTD
2 Wire Pt SAMA RTD
2 Wire Special
3 Wire Ohms
3 Wire Pt DIN RTD
3 Wire Pt SAMA RTD
3 Wire Special
4 Wire Ohms
4 Wire Pt DIN RTD
4 Wire Pt SAMA RTD
4 Wire Special
mV
HHT Only
Next
Enter
Next
Select Units
(Skipped if
Ohms or mV input)
Enter
Deg C
Deg F
Deg R
Deg K
Next
Enter
Next
Enter
Set blinking digit
NEXT increments blinking digit
ENTER sets digit
Enter
Next
Enter
Set blinking digit
NEXT increments blinking digit
ENTER sets digit
Enter
Next
Enter
Next
Change
Zero (LRV)
Plus?
Enter
Minus?
Next
Change Full
Scale (URV)
Plus?
Enter
Minus?
Next
Select Sensor
Failsafe
On?
Enter
Off?
Next
Failsafe Report
Enter
Failsafe Low?
Failsafe High?
Failsafe Off?
Next
Enter
Next
Raise mA Out?
Trim 4mA
Enter
Lower mA Out?
Next
Enter
Enter
Press NEXT to Raise mA output in 2 uA increments
----------------------------------------------------Press NEXT to Lower mA output in 2 uA increments
Enter
Press NEXT to Raise mA output in 2 uA increments
----------------------------------------------------Press NEXT to Lower mA output in 2 uA increments
Enter
Next
Raise mA Out?
Trim 20mA
Enter
Lower mA Out?
Enter
Next
Enter
Next
Plus?
Trim Display
Enter
Next
Enter
Next
Enter
Minus?
Next
Select
Language
Enter
English
Deutsch
French
Espanol
Next
Figure 8-3
TX60-2A Configuration Flowchart
Page 39
Set blinking digit
NEXT increments blinking digit
ENTER sets digit
Enter
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OMEGA…Of Course!
TEMPERATURE
R
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Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies
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Page 40