PRTXB Series RTD Process Thermometers M-4998/1110

PRTXB Series RTD Process Thermometers M-4998/1110
PRTXB Series
RTD Process Thermometers
M-4998/1110
MODEL
PRTXB-2
PRTXB-2-SL
PRTXB-4
PRTXB-4-SL
PRTXB-6
PRTXB-6-SL
PRTXB-9
PRTXB-9-SL
PRTXB-12
PRTXB-12-SL
*Thermowell
PROBE
LENGTH
2.5"
2.5"
4"
4"
6"
6"
9"
9"
12"
12"
PROBE
TYPE
Fixed
Spring-Loaded*
Fixed
Spring-Loaded*
Fixed
Spring-Loaded*
Fixed
Spring-Loaded*
Fixed
Spring-Loaded*
required for spring-loaded versions
3.5"
2.0"
Low battery
indication
ALARM 1
XXXXX
88888

Turn at
hex
fitting
only!
1.37"
Shop online at
3.0"
ALARM 2

0.75"
omega.com
e-mail: info@omega.com
For latest product manuals:
omegamanual.info
1.25"
Hex nipple
1/2" NPT x 1/2" NPT
316 stainless
Stem
Length
L
Measured from
top of full threads
to tip of probe.
Length L =
thermowell “A” or
“element length”
User’s Guide
Continuous weld
on non-spring
loaded models
0.25" dia.
Spring-loaded models
approx. 0.25" longer
to compress element
in thermowell.
0.50" max.
compression
Range and Resolution
–58.0°F to 392.0°F, –50.0°C to 200.0°C or 220K to 475K
0.1 degree resolution
User selectable °F, °C, or K
Accuracy
Includes linearity, hysteresis, repeatability
±0.3°C at 0°C, ±1.1°C at 150°C
11-point linearization table
Display
4 readings per second nominal display update rate
4 digit LCD, 0.5" H, 5 character 0.25" H alphanumeric
BL models: red LED backlight
MADE IN
Batteries, Battery Life, Low Battery Indication
B: 2 AA alkaline, approx. 1000 hours
BL: 2 AA alkaline, approx. 150 to 750 hours depending on
backlight usage.
BL: Button press activates backlighting for 1 minute
Low battery symbol on display
Controls and Functions
Three front buttons for power on/off, min/max functions,
selection of °F, °C, or K, auto shutoff times, calibration and,
configuration options
User-defined pass codes for configuration and calibration to
prevent unauthorized changes
Sensor
IEC-751 Class B 100  Platinum RTD, 0.00385 alpha curve
1
/2" NPT male, 316 stainless steel
Spring-loaded probe versions fit standard thermowells
Maximum and Minimum Readings
User-configurable maximum and/or minimum temperature
indication. Factory default configuration MAX/MIN disabled.
Choice of MAX only, MIN only, MAX/MIN, or none
Option to retain or clear MAX/MIN temperatures at shutoff
Auto Shutoff Time
Factory default 5 minutes. User settable to 1, 2, 5, 10, 15, 20,
30 minutes, 1, 2, 4, 8 hours, or manual on/off.
OFF warning before auto shutoff to allow reset of timer
Out-of-Range
ALARM1 under range indication on display
ALARM2 over range indication on display
Calibration
User settable pass code required to enter calibration mode
Zero and span temperature calibration
Non-interactive zero, span, and linearity, ±10% of range
Weight
Product:
Shipping:
12 ounces (approximately)
1 pound (approximately)
Housing
ABS/polycarbonate NEMA 4X case, polycarbonate label, rubber
rear gasket
Connection, Material, Media Compatibility
1/2" NPT male fitting, 316L stainless steel
All wetted parts are 316L stainless steel
Thermowell required for spring-loaded versions
Storage Temperature
–40 to 203°F (–40 to 95°C)
Operating Range
–4 to 185°F (–20 to 85°C) at housing
PRTXB Series RTD Process Thermometers
off

Press any button to
keep on
75.0

Press and hold
to turn off
ALARM 1
ALARM 2
MAX Mode
The display indicates the stored maximum
reading and the lower display alternates
between indicating MAX and the temperature
units. The thermometer may be left in this
mode if desired.
75.0


Press and hold
about 1 sec.
i25.5
deg f
max

If no buttons are pressed for 15 seconds,
the unit will automatically save the displayed
selection and exit the change mode.
Press and release the power button to index
to the next position. The 3 will remain, and
the second position will be blinking.
Use the  and  buttons to select 5.
Press and release the power button to index
to the next position. 3 5 will remain, and the
third position will be blinking.


or
Use the  and  buttons to select 0.





Release buttons
____
cfgpc


3___
cfgpc


or
Move to Increment
next # up or down
35 i0
cfgpc


or
Move to Increment
next # up or down
35 i0
cfgpc


Press to enter configuration mode
Press and release the power button to
proceed with configuration procedures. Note:
If an incorrect pass code is entered, the unit
will return to the start of the pass code entry
sequence.
MAX/MIN Capture Configuration
The upper display will be blank.
--/--
Use the  and  buttons to select from the
following.
deg C

Press and release the power button to index
to the next position. 3 5 1 will remain, and
the fourth position will be blinking.
cf6




deg f
deg C
Kelvn
Save & exit
MX/MN Both highest and lowest values will
be captured
normal mode
MX/--


or
Select min
max modes
Only highest value will be captured
--/MN Only lowest value will be captured
5
AST M


Press & hold
i0
ast m or
ast h

Use the  and  buttons to select 0, or 1,
2, 5, 10, 15, 20, or 30 minutes, or 1, 2, 4,
or 8 hours.
When the desired auto shutoff time is
displayed, press and release the power
button to save the selection and exit the
change mode.

Press &
hold
An auto shutoff time of zero signifies that the
auto shutoff feature is disabled.
deg f


Auto Shutoff Time Selection
To change the auto shutoff time, press and
hold the  button until the auto shutoff time
is displayed.
The lower display will indicate AST M if the
auto shutoff time displayed is in minutes, and
AST H if it is in hours.
DEG F

deg f
If no buttons are pressed for 15 seconds, the
unit will automatically save the selection and
exit the change mode.
deg f
MAX/MIN Operation (if enabled)
The factory default setting has min/max disabled. To turn this
feature on, see the section titled User Configuration Mode. The
unit may be configure to use max, min, neither, or both.
To step the unit through the display modes,
press and hold the power button about 1
second until the display indicates MAX or
MIN and then release the button. The display
mode cycle repeats through the following
steps.
When the desired units are displayed, press
and release the power button to save the
selection and exit the change mode.
Use the  and  buttons to set the leftmost digit to 3.
Use the  and  buttons to select 1.
Temperature Unit Selection
To change temperature units, press and hold
the  button until the temperature indication
is blanked and only the temperature units are
displayed.


deg f

Press until clr
is displayed
The Min/Max memory may be configured to be automatically
cleared when the unit shuts down, or may be configured to
retain the values when the unit is shut off. See the section titled
User Configuration Mode for these options.
Then use the  and  buttons to select the
desired temperature units. Standard units are
Fahrenheit, Celsius, and kelvin.





deg f

mx/mn

75.0
Out-of-Range Indications
If the RTD temperature goes above 392°F or
200°C, ALARM1 will be displayed.
If the RTD temperature goes below –58°F or
–50°C, ALARM2 will be displayed.
If the RTD temperature continues beyond
these limits, the display will eventually
indicate 1.-.-.-.
ALARM 2
Enter the user-modifiable configuration pass
code (3510 factory default).
clr

The unit will automatically revert to normal
operation if no buttons are operated for
approximately 15 seconds. To cancel and
return to normal operation, press and release
the power button without entering any pass
code characters.

or
4
AST H

--/--

Save & exit
normal mode
MX/mn
Capture feature is disabled
Press and release the power button to move
on to the next parameter.

To shut off the unit manually at any time,
press and hold the power button until the
display indicates OFF (up to about 5 seconds
total if MAX/MIN is enabled) and then release
the button.

or


If the unit is configured with an auto shutoff
time, a five second warning period is
provided prior to auto shutoff, during which
the display indicates OFF. The auto shutoff
timer is reset whenever any button is pressed
and released.
XXXXX
88888

normal mode

The RTD probe has a time constant of
approximately 10 seconds, typical of an RTD
probe in a stainless sheath. Time constant is
characterized as the RTD changing to 63.2%
of its new temperature span in one time
constant, and 95% of its new temperature
span in three time constants.
ALARM 1

Operation
Press and release the power button to power
up the unit. The unit tests all LCD segments
and displays the RTD temperature on the
upper display and the temperature units on
the lower display. Readings are updated
approximately 4 times per second.

Press and hold
about 1 sec.

1


Install or remove using wrench on probe hex fitting only. Do not
attempt to tighten or loosen by turning the housing.
deg f
Before the unit enters the configuration
mode, the display initially indicates _ _ _ _
with the first underscore blinking, and with
CFGPC on the lower display.

2
clr
auto
Use the  and  buttons to select from the
following.
Maximum and minimum values will
automatically be cleared whenever
the unit shuts off.
MAN
Maximum and minimum values will
be retained and must be cleared
manually as desired.
Press and release the power button to save
the user configuration and restart the unit.

Press to save and
move to next
Auto/Manual MAX/MIN Clearing
The upper display will indicate clr.
AUTO





Do not exceed maximum allowable housing temperature.
Reset MAX and MIN
To manually reset the stored maximum
and minimum readings, press and continue
to hold the power button until the display
indicates clr (about 3 seconds total) and then
release the button. The stored maximum and
minimum values are cleared. The unit returns
to the normal mode.
Press until MIN
is displayed
Release all buttons when the display
indicates CFG.



The non-spring-loaded versions can be used in non-pressurized
applications or applications with no flow. Due to the hardness of
316 stainless steel, it is recommended that a thread sealant be
used to ensure leak-free operation.


The spring-loaded versions must be used with a thermowell.
Use a thermowell appropriate for the process.
Then press the power button.


Installation and Precautions
Read these instructions before installation. Configuration may
be easier before installation.
Return to Normal Mode
To return from minimum or maximum
reading mode to the normal operating
mode, press and hold the power button for
about 1 second until the display indicates
the temperature units and then release the
button. The unit returns to the normal mode.
The stored maximum and minimum values
are not cleared and continue to be updated.
deg f
min
User Configuration Mode
With the unit off, press and hold the 
button.
or
Select auto or
manual clear
clr
man

The unit is capable of automatically capturing and storing
maximum and maximum readings. The min/max functionality
can be set up as required, and the readings can be either saved
or cleared when the unit shuts off.
i25.5

The temperature reading is linearized for the digital display. The
temperature display may be set up to read °F, °C, or kelvin and
the auto shutoff time may be set as needed.
MIN Mode
Press and hold the power button about 1
second The display indicates the stored
minimum reading and the lower display
alternates between indicating MIN and the
temperature units. The thermometer may be
left in this mode if desired.

Description
The PRTXB series is microprocessor controlled industrial RTD
temperature indicator with a digital temperature display in a
rugged NEMA 4X housing.

2


Press to save and
restart
3
PRTXB Series RTD Process Thermometers
The unit is calibrated at two points, at ice point and at a
temperature above ice point.
For general service, the full scale temperature is normally used
for the second point. However, if a particular temperature is of
critical interest it may be used instead for greatest accuracy at
that point.
Enter Calibration Mode
To enter the calibration mode, begin with
the unit powered off, and press and hold the
 button.
Use the  and  buttons to select 1.
Press and release the power button to index
to the next position. 3 5 1 will remain, and
the fourth position will be blinking.
Use the  and  buttons to select 0.
To store the calibration parameters and exit
calibration mode, press and hold the power
button until the display indicates - - - - .



or
Increment up
or down
Use the  and  buttons to adjust the upper
display segments to indicate the applied
temperature value.
---

Release buttons
____
calpc


3___
calpc


or
Move to Increment
next # up or down
Configuration Pass Code Access
With the unit off, press and hold the 
button.
Then press the power button.
Calibration Pass Code Access
With the unit off, press and hold the  button
to view and/or change the user calibration
pass code.
Then press the power button.
Release all buttons when the display
indicates CAL.
or
Move to Increment
next # up or down
35 i0
Note: The unit will automatically revert to
normal operation if no buttons are operated
for approximately 15 seconds.
calpc


calpc


Press to enter
calibration mode
To cancel and return to normal operation,
press and release the power button without
entering any pass code characters.
Enter Access Code 1220
Use the  and  buttons to set the leftmost digit to 1.
Note: If an incorrect pass code is entered, the
unit will return to the start of the pass code
entry sequence.
Press and release the power button to index
to the next position. The 1 will remain, and
the second position will be blinking.
Calibration Procedure
Upon successful pass code entry, the
upper display will indicate the RTD probe
temperature. The lower display will alternate
as indicated below.
Use the  and  buttons to select 2.
75.0
def F
cal


2
Press and release the power button to index
to the next position. 1 2 will remain, and the
third position will be blinking.
Use the  and  buttons to select 2.
Press and release the power button to index
to the next position. 1 2 2 will remain, and
the fourth position will be blinking.
Use the  and  buttons to select 0.
Note: If an incorrect access code was
entered, the unit will return to the start of the
access code entry sequence.

1
Release all buttons when the display
indicates CFG.
View/Change Pass Code
Before the unit enters the view or change
pass code mode, the display initially indicates
_ _ _ _ with the first underscore blinking,
and with CFGPC or CALPC on the lower
display.
35 i0





Changing the Pass Codes
The factory default pass code of 3510 may be changed if
desired. Separate pass codes may be used for min/max
configuration access and calibration access.
Press and release the power button to
proceed with calibration.
Note: To store the calibration parameters
and exit calibration mode at any time, press
and hold the power button until the display
indicates - - - -.

The lower display segments will alternate
between CAL and DEG C or DEG F.
cf6


Release buttons
____
cfgpc


- or -

2


Press and release the power button to index
to the next position. 3 5 will remain, and the
third position will be blinking.
cal
deg F

Use the  and  buttons to select 5.
392.0
1
cal


Release buttons
____
calpc


i___
cfgpc





Press and release the power button to index
to the next position. The 3 will remain, and
the second position will be blinking.
Span Calibration
Apply full-scale temperature to the RTD.
or
Increment up
or down
or
Move to Increment
next # up or down
i220
cfgpc





Use the  and  buttons to set the leftmost digit to 3.




Enter the user-modifiable pass code (3510
factory default).
1



To cancel and return to normal operation,
press and release the power button without
entering any pass code characters.

cal

Note: The unit will automatically revert to
normal operation if no buttons are operated
for approximately 15 seconds.

2
Release all buttons when the display
indicates CAL.
Before the unit enters the calibration mode,
the display initially indicates _ _ _ _ with the
first underscore blinking, and with CALPC on
the lower display.
Use the  and  buttons to adjust the upper
display to indicate 0.0 °C or 32.0 °F.
or
Move to Increment
next # up or down
Operate the  and  button to select
the first character of the new pass code.
Characters 0-9 and A, b, C, d, E, F may be
used.
When the correct first character is being
displayed, press and release the power
button to proceed to the next pass code
character.
Repeat above until the entire pass code is
complete.
To exit the view or change pass code mode,
press and hold the power button.
Release the button when the display
indicates - - - - to restart the unit.
35 i0
cfgpc


Press to save and
restart

Then press the power button.
Apply 0.0 °C or 32.0 °F to the RTD.

The unit enters and remains in the calibration mode until
restarted manually or power is removed. While in the calibration
mode, the auto shutoff timer is disabled, and the Min/Max
feature is disabled.

The display will indicate the existing userdefined pass code with CFGPC or CALPC on
the lower display. To exit without changes,
press the power button.


Press to enter pass
code configuration
mode
35 i0
cfgpc





The lower display will alternate between ICE
and DEG C or DEG F.
ice
deg F
or
Move to Increment
next # up or down
A250
cfgpc





Calibration may be performed in any of the available
temperature units, the use of Fahrenheit or Celsius is assumed
in this procedure. Select the temperature units for calibration
prior to entering the calibration mode.
32.0
Press and release the power button to
proceed.
Move to Increment
next # up or down
A250
cfgpc

Ice-Point Calibration
When the applied temperature is below
approximately 12 °C (or 54 °F), the unit will
automatically select the ice-point calibration
mode.


Calibration
The PRTXB is factory calibrated and there is generally no need
to alter calibration settings. Required calibration equipment
includes a temperature reference of at least four times the
unit’s accuracy, a dry-block calibrator or a temperature
controlled bath.


Press to save and
restart
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info@omega.com.mx
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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 2004 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.
M4998/1110
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