53IIB/54IIB
Thermometer
Users Manual
January 2011
© 2011 Fluke Corporation. All rights reserved. Specifications are subject to change without notice.
All product names are trademarks of their respective companies.
LIMITED WARRANTY AND LIMITATION OF LIABILITY
This Fluke product will be free from defects in material and workmanship for three years from the date of purchase. This
warranty does not cover fuses, disposable batteries, or damage from accident, neglect, misuse, alteration, contamination, or
abnormal conditions of operation or handling. Resellers are not authorized to extend any other warranty on Fluke’s behalf.
To obtain service during the warranty period, contact your nearest Fluke authorized service center to obtain return
authorization information, then send the product to that Service Center with a description of the problem.
THIS WARRANTY IS YOUR ONLY REMEDY. NO OTHER WARRANTIES, SUCH AS FITNESS FOR A PARTICULAR
PURPOSE, ARE EXPRESSED OR IMPLIED. FLUKE IS NOT LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
CONSEQUENTIAL DAMAGES OR LOSSES, ARISING FROM ANY CAUSE OR THEORY. Since some states or countries
do not allow the exclusion or limitation of an implied warranty or of incidental or consequential damages, this limitation of
liability may not apply to you.
Fluke Corporation
P.O. Box 9090
Everett, WA 98206-9090
U.S.A.
11/99
Fluke Europe B.V.
P.O. Box 1186
5602 BD Eindhoven
The Netherlands
Table of Contents
Title Page
Safety Information .......................................................................................................... 1
Contacting Fluke........................................................................................................ 1
Getting Started ............................................................................................................... 4
Components .............................................................................................................. 5
Display Elements....................................................................................................... 6
Buttons ...................................................................................................................... 7
Using the Thermometer.................................................................................................. 9
Changing Setup Options ................................................................................................ 9
Entering and Exiting Setup ........................................................................................ 9
Changing the Logging Interval................................................................................... 10
Changing the Thermocouple Type ............................................................................ 11
Changing the Offset................................................................................................... 11
Enabling or Disabling Sleep Mode............................................................................. 12
Setting the Time ........................................................................................................ 12
Changing the Line Frequency ................................................................................... 13
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Measuring Temperatures............................................................................................... 13
Connecting a Thermocouple..................................................................................... 13
Displaying Temperatures .......................................................................................... 14
Holding the Displayed Temperatures........................................................................ 14
Viewing the MIN, MAX, and AVG Readings ............................................................. 14
Using the Offset to Adjust for Probe Errors............................................................... 15
Using Memory ............................................................................................................... 15
Initial Conditions and Data Entries ............................................................................ 16
Starting and Stopping Logging.................................................................................. 16
Clearing Memory....................................................................................................... 17
Viewing Logged Readings ........................................................................................ 17
Communicating with a PC ............................................................................................. 18
Maintenance .................................................................................................................. 19
Replacing the Batteries............................................................................................. 19
Cleaning the Case and Holster ................................................................................. 19
Calibration................................................................................................................. 19
Specifications ................................................................................................................ 19
Environmental ........................................................................................................... 19
80 PK-1 Thermocouple (supplied with thermometer)................................................ 20
Electrical ................................................................................................................... 20
Replacement Parts and Accessories ............................................................................. 21
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53IIB/54IIB
Safety Information
The Fluke 53IIB and 54IIB Thermometers (“the
thermometer”) are microprocessor-based, digital
thermometers designed to use external J-, K-, T-, E-, R-,
S-, and N-type thermocouples (temperature probes) as
temperature sensors.
Use the thermometer only as specified in this manual.
Otherwise, the protection provided by the meter may be
impaired.
Refer to safety information in Table 1 and the meter
symbols in Table 2.
Contacting Fluke
To order accessories, receive assistance, or locate the
nearest Fluke distributor or Service Center, call:
1-888-99-FLUKE (1-888-993-5853) in USA
1-800-36-FLUKE (1-800-363-5853) in Canada
+31-402-678-200 in Europe
+81-3-3434-0181 in Japan
+65-738-5655 in Singapore
+1-425-446-5500 from other countries
Address correspondence to:
Fluke Corporation Fluke Europe B.V.
P.O. Box 9090 P.O. Box 1186
Everett, WA 98206-9090 5602 BD Eindhoven
USA The Netherlands
Visit us on the World Wide Web at: www.fluke.com
To register your product, visit http://register.fluke.com
.
.
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Users Manual
Table 1. Safety Information
W Warning
A Warning identifies conditions and actions that pose hazards to the user. To avoid electrical shock or
personal injury, follow these guidelines:
• Before using the thermometer inspect the case. Do not use the thermometer if it appears damaged.
Look for cracks or missing plastic. Pay particular attention to the insulation around the connectors.
• Disconnect the thermocouple(s) from the thermometer before opening the case.
• Replace the batteries as soon as the battery indicator (
can lead to personal injury.
• Do not use the thermometer if it operates abnormally. Protection may be impaired. When in doubt,
have the thermometer serviced.
• Reflective objects result in lower than actual temperature measurements. These objects pose a burn
hazard.
• Do not operate the thermometer around explosive gas, vapor, or dust.
• Do not connect to voltages > 30 V ac rms, 42 V pk, 60 V dc from earth ground.
) appears. The possibility of false readings
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53IIB/54IIB
Safety Information
Table 1. Safety Information (cont.)
W Warning (cont.)
• Model 54: Measurement errors may occur if voltages on the measurement surfaces result in potentials
greater than 1 V between the two thermocouples. When potential differences are anticipated between
the thermocouples, use electrically insulated thermocouples.
• When servicing the thermometer, use only specified replacement parts.
• Do not use the thermometer with any part of the case or cover removed.
Caution
A Caution identifies conditions and actions that may damage the meter or the equipment under test.
• Use the proper thermocouples, function, and range for your thermometer.
• Do not attempt to recharge the batteries.
• To prevent explosion, do not throw batteries into a fire.
• Follow local laws or regulations when disposing of batteries.
• Match the + and − polarities of the battery with the battery case.
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Table 2. International Symbols
Refer to the manual for information about this feature.
W
Battery.
M
Getting Started
Everything in this Users Manual applies both to Models
53 and 54 unless otherwise indicated.
To become familiar with the thermometer, study the
following:
Complies with European Union directives.
P
Complies with relevant Canadian Standards
)
Association directives.
• Figure 1 and Table 3 describe the components.
• Figure 2 and Table 4 describe the display.
• Table 5 describes the functions of the buttons.
Then read the following sections.
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53IIB/54IIB
Getting Started
Components
5
4
3
6
7
Figure 1. Components
1
2
aat01f.eps
Table 3. Components
Thermocouple T1 input
Model 54: Thermocouple T2 input
Holster
Display
Buttons
Battery door
Batteries
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Display Elements
1
12
11
Figure 2. Display Elements
Table 4. Display Elements
2
3
4
5
6
7
The thermocouple measurement includes an
offset. See "Changing Setup Options."
The displayed readings do not change.
A shift function is in progress.
8
9
Readings are being logged.
Setup is in progress.
Logged readings are displayed.
10
aat02f.eps
Low battery. Replace the batteries.
Primary Display. Model 53: T1 reading.
Model 54 T1, T2, or T1-T2 reading.
The temperature units.
Secondary Display: MAX, MIN, AVG, MEMORY,
or offset. Model 54: T1 or T2 reading.
The thermocouple type.
Time Display: 24-hour clock. Shows the
INTERVAL length in SETUP. Shows elapsed time
when AVG is on or before clock has been set.
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53IIB/54IIB
Getting Started
Buttons
Table 5. Buttons
(Shift function)
Press to turn the thermometer on or off.
Press ,
secondary display.
Press , (CLEAR MEMORY) to delete logged readings from memory.
Press ,
Press to turn the backlight on and off. The backlight turns off after 2 minutes without any button
presses. If the battery is low, the backlight is disabled.
(CANCEL) to stop displaying the minimum, maximum, and average readings in the
(PC/IR SEND) to toggle the IR port on and off.
Press to step through the maximum, minimum, and average readings.
When viewing logged readings, shows the maximum, minimum, and average of the logged readings.
Press , (CANCEL) to turn off this display.
Press to switch between Celsius (oC), Fahrenheit (oF), and Kelvin (K).
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Table 5. Buttons (cont.)
Press to freeze or unfreeze the displayed readings.
Press when turning on the thermometer to test the display. All display elements appear.
8
Model 54: Press to toggle showing the T1, T2, and T1-T2 (differential temperature measurement) in
the primary or secondary display.
Press to start or exit Setup. (See "Changing Setup Options.")
Press to scroll to the Setup option you want to change.
Press to increase the displayed setting.
Press to scroll to the Setup option you want to change.
Press to decrease the displayed setting.
Press to enter a Setup option.
Press again to store the displayed setting in memory.
Press to start or stop logging.
During manual logging, the thermometer stores a single set of logged readings in memory each time you
press .
Press to show logged readings and MIN MAX readings on the display.
Press again to stop.
53IIB/54IIB
Using the Thermometer
Using the Thermometer
1. Plug the thermocouple(s) into the input connector(s).
2. Press to turn on the thermometer.
After 1 second the thermometer displays the first reading.
If no thermocouple is plugged into the selected input or the
thermocouple is "open," the display shows:
"- - - -."
Changing Setup Options
Use Setup to change the logging interval, thermocouple
type, offset, sleep mode, time, and line frequency settings.
The thermometer stores the settings in its memory. Setup
settings reset only when the batteries are removed for
more than 2 minutes.
Entering and Exiting Setup
When the thermometer is in Setup mode, the display
shows .
• Press
to start or exit Setup.
Notes
Press
or to scroll to the setup option you
want to change.
Setup is disabled in MIN MAX mode.
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Changing the Logging Interval
The logging interval determines how often the
thermometer stores logged readings in memory. You
choose the length of the logging interval. See "Using
Memory."
The thermometer stores logged readings at the end of
each logging interval. You can select a logging interval of
1 second (1), 10 seconds (2), 1 minute (3), 10 minutes (4),
or user-defined (
You can also set the logging interval manually (0). Each
time you press , the thermometer stores the current
readings in memory.
1. Press or until the display shows INTERVAL.
2. Press to display the logging interval choices.
3. Press or until the display shows the logging
interval you want, and then press to select.
).
4. If you selected a user-defined logging interval:
• Press or until the display shows
hour:min or min:sec, and then press to
select.
The left two digits blink.
• Press or until the left two digits you want
appear on the display, and then press to
select them.
The right two digits blink.
• Press or until the right two digits you
want appear on the display, and then press
to select them.
Holding down or causes the number to
change more quickly.
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53IIB/54IIB
Changing Setup Options
Changing the Thermocouple Type
1. Press or until the display shows TYPE.
2. Press to display the thermocouple type choices.
The currently selected thermocouple blinks.
3. Press or until the thermocouple you want
appears on the display.
4. Press to store the thermocouple type in memory.
Changing the Offset
You can adjust the thermometer's readings to compensate
for the errors of a specific thermocouple. See "Using the
Offset to Adjust for Probe Errors." The allowable
adjustment range is ±5.0 oC or K, and ±9.0 oF.
Model 54: You can store individual offsets for T1 and T2.
1. Press or until the display shows and
T1 or T2.
2. Press to indicate that you want to change the
offset setting.
The temperature measurement plus the offset
appears in the primary display. The offset appears in
the secondary display.
3. Press or until the primary display shows the
correct reading.
4. Press to store the offset setting in memory.
Remember to reset the offset to 0.0 when it is no longer
needed. The offset automatically resets to 0.0 when you
change the thermocouple type.
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Enabling or Disabling Sleep Mode
The thermometer enters sleep mode if no button press
occurs for 20 minutes.
Pressing any button wakes the thermometer and returns it
to its previous state.
1. Press or until the display shows .
2. Press to indicate that you want to change the
sleep setting.
The display shows if sleep mode is on and if
sleep mode is off.
3. Press or as needed until the display shows
or .
4. Press to store the sleep setting in memory.
Sleep mode is enabled each time you turn on the
thermometer and is automatically disabled in MIN MAX
and logging modes.
Setting the Time
1. Press or until the display shows the time if it
is set or shows "- - : - -."
2. Press to indicate you want to set the time.
The left two digits blink.
3. Press or until the display shows the correct
hour (24-hour format), and then press to select.
The right two digits blink.
4. Press or until the display shows the correct
minutes, and then press to store the time in
memory.
Note
Holding down or causes the number to
change more quickly.
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53IIB/54IIB
Measuring Temperatures
Changing the Line Frequency
For optimum rejection of line noise, set the thermometer
for the local line frequency as follows:
1. Press or until the display shows .
2. Press to indicate that you want to change the line
setting.
3. Press or as needed until the display shows
or (50 Hz or 60 Hz).
4. Press to store the line setting in memory.
Measuring Temperatures
Connecting a Thermocouple
Thermocouples are color coded by type based on the
North American ANSI Color Code:
Type Color Type Color
J Black R Green
K Yellow S Green
T Blue N Orange
E Purple
1. Plug a thermocouple into the input connector(s).
2. Set the thermometer for the correct thermocouple
type.
To change the thermocouple type, see “Changing
Setup Options.”
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Displaying Temperatures
1. Press to select the correct temperature scale.
2. Hold or attach the thermocouple(s) to the
measurement location.
The temperature reading appears in the selected
display.
3. Model 54: Press
T1, T2, and T1-T2 reading in the primary or
secondary display.
The display shows "- - - -" when a thermocouple
is not connected.
The display shows (overload) when the
temperature being measured is outside the
thermocouple's valid range.
Model 54: If only thermocouple T2 is connected,
the T2 reading appears in the primary display.
to toggle between showing the
Notes
Holding the Displayed Temperatures
1. Press to freeze the readings on the display.
The display shows .
2. Model 54: Press
T1-T2 readings in the primary or secondary display.
3. Press
again to turn off the HOLD function.
to toggle showing the T1, T2, or
Viewing the MIN, MAX, and AVG Readings
1. Press to step through the maximum (MAX),
minimum (MIN), or the average (AVG) readings.
The elapsed time since entering MIN MAX mode, or
the time at which the minimum or maximum occurred,
appears on the display.
2. Press , (CANCEL) to exit MIN MAX mode.
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53IIB/54IIB
Using Memory
Using the Offset to Adjust for Probe Errors
Use the offset option in Setup to adjust the thermometer's
readings to compensate for the errors of a specific
thermocouple.
1. Plug the thermocouple into the input connector.
2. Place the thermocouple in a known, stable
temperature environment (such as an ice bath or a
dry well calibrator).
3. Allow the readings to stabilize.
4. In Setup change the offset until the primary display
reading matches the calibration temperature. (See
"Changing Setup Options.")
Using Memory
During a logging session the thermometer stores logged
readings in its memory.
At the end of the logging session you can view the logged
readings on the display.
You can also transfer the logged readings to a PC running
FlukeView Forms software. (See "Communicating with a
PC.")
FlukeView Forms displays the logged readings on an
online form, which you can print or store for later use.
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Users Manual
Initial Conditions and Data Entries
Logged readings include initial conditions and data entries.
The initial conditions are the thermocouple type and the
offsets for each thermocouple input. You can only view
initial conditions using FlukeView Forms.
The data entries are a time stamp, the T1 reading, and the
T2 and T1-T2 readings (Model 54). You can view these
values by pressing
Temperature readings display 0.1 degree resolution in
FlukeView Forms.
The thermometer has 500 memory locations. The
thermometer stores 499 sets of temperature readings and
one set of initial conditions when logging continuously. It
stores 250 sets of temperature readings and 250 sets of
initial conditions when logging individual points manually.
or using FlukeView Forms.
Starting and Stopping Logging
Setup, memory clear, and PC communications are
inaccessible during logging.
1. Set the logging interval. (See “Changing Setup
Options.”)
2. Press to start logging.
The display shows .
3. Press again to stop logging.
4. If you selected a manual logging interval, press
each time you want to store logged readings in
memory.
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53IIB/54IIB
Using Memory
Clearing Memory
When memory is full, appears on the display and
logging stops. You can clear memory in normal or MIN
MAX mode.
• Press , (CLEAR MEMORY) to delete logged
readings from memory.
The display shows the following for 2 seconds.
MEMORY
Viewing Logged Readings
1. Press to view logged readings.
The display shows .
2. Press or to scroll through the logged readings.
The display shows each logged reading, its time
stamp, and its memory location. For example,
Figure 3 shows the logged reading stored at 2:02 PM
in memory location 18.
aat03f.eps
Figure 3. Logged Reading
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53IIB/54IIB
Users Manual
3. Press to step through the minimum, maximum,
average, and current logged reading. For example,
Figure 4 shows the maximum reading in memory. The
maximum reading occurred at 1:49 P.M. and was
stored in memory location 5.
aat04f.eps
Figure 4. Maximum Reading
4. Press to stop viewing logged readings.
Note
The thermometer calculates the minimum and
maximum of all logging sessions in memory.
The display shows "- - : - -" if the log is empty.
Communicating with a PC
You can transfer the contents of the thermometer’s
memory to a PC using FlukeView Forms. The
communication requires an IR (infrared) serial connection.
Refer to the FlukeView Forms Installation Guide and
FlukeView Help.
FlukeView Forms places the logged readings into
standard (default) or customized forms. The forms also
display user comments. You can use these forms to
satisfy ISO-9000 documentation requirements.
When you send logged readings to a PC, all functions are
disabled except power off, backlight, and turning off
communication.
• Press ,
on and off.
The display shows:
When the IR port is enabled you can communicate with
FlukeView Forms.
(PC/IR SEND) to toggle the IR port
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53IIB/54IIB
Maintenance
Maintenance
Replacing the Batteries
Refer to the safety information in Table 1 before replacing
the batteries.
1. Turn off the thermometer if necessary.
2. Loosen the screw and remove the battery door.
3. Replace the three AA batteries.
4. Replace the battery door and tighten the screw.
Cleaning the Case and Holster
Use soap and water or a mild commercial cleaner.
Wipe with a damp sponge or soft rag.
Calibration
To ensure that the thermometer performs to its accuracy
specifications, Fluke recommends that you calibrate the
thermometer annually, starting one year after purchase.
To calibrate the thermometer, contact Fluke for the
Service Center nearest you or follow the calibration
procedure in the service manual listed in "Replacement
Parts and Accessories."
Specifications
Environmental
o
C to 50 oC
Operating
Temperature
Storage
Temperature
Humidity
-10
o
F to 122 oF)
(14
o
C to +60 oC
-40
o
F to +140 oF)
(-40
Non condensing <10
o
95 % RH: 10
75 % RH: 30
45 % RH: 40
C to 30 oC (50 oF to 86 oF)
o
C to 40 oC (86 oF to 104 oF)
o
C to 50 oC (104 oF to 122 oF)
o
C (<50 oF)
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53IIB/54IIB
Users Manual
General
Weight
Dimensions
(without
holster)
Battery
Certification
Safety
EMC EN/IEC 61326-1:2006
CAT I OVERVOLTAGE (Installation) CATEGORY
* Refers to the level of Impulse Withstand Voltage protection
provided. Category 1 products should not be attached to mains
circuits.
280 g (10 oz)
2.8 cm × 7.8 cm × 16.2 cm
(1.1 in × 3 in × 6.4 in)
3 AA batteries
P,
)
CAN/CSA C22.2 No. 61010-1-04, ANSI/UL
61010-1:2004, EN/IEC 61010-1:2001
I, Pollution Degree 2 per IEC1010-1*
80 PK-1 Thermocouple (supplied with thermometer)
Type
Temperature
Range
Accuracy
Type K, Chromel Alumel, bead style
o
C to +260 oC
-40
o
F to +500 oF)
(-40
o
C (±2.0 oF)
±1.1
Electrical
Measurement
Range
Display
Resolution
J-type: -210
(-346
K-type: -200
(-328
T-type: -250
(-418
E-type: -150
(-238
N-type: -200
(-328
R- and S-type: 0
(+32
o
0.1
1.0 oC / oF / K ≥1000o
o
C to +1200 oC
o
F to +2192 oF)
o
C to +1372 oC
o
F to +2501 oF)
o
C to +400 oC
o
F to +752 oF)
o
C to +1000 oC
o
F to +1832 oF)
o
C to +1300 oC
o
F to +2372 oF)
o
o
F to +3212 oF)
C to +1767 oC
C / oF / K <1000
o
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53IIB/54IIB
Replacement Parts and Accessories
Electrical (cont.)
Measurement
Accuracy, T1, T2,
or T1-T2
(Model 54)
Temperature
Coefficient
Electromagnetic
Compatibility
Maximum
Differential
Common Mode
Voltage
Temperature
Scale
J-, K-, T-, E-, and N-type: ±[0.05 % of
reading + 0.3
(-148
o
o
C (0.5 oF)] [below -100 oC
F): add 0.15 % of reading for J-,
K-, E-, and N-type; and 0.45 % of reading
for T-type] R- and S-type: ±[0.05 % of
reading +0.4
0.01 % reading + 0.03 oC per oC
(0.05
o
C to 28 oC (+64 oF to +82 oF) range
[below -100
o
C (0.7 oF)]
o
F per oF) outside the specified +18
o
C -148 oF): add 0.04 % of
reading for J-, K-, E-, and N-type; and
0.08 % of reading for T-type]
Susceptibility: ±2 oC (±3.6 oF) for 80 MHz
to 200 MHz in 1.5 V/m field, for 200 MHz
to 1000 MHz in 3 V/m field.
Emmisions: Commercial Limits per
EN50081-1
1 V (Maximum voltage difference between
T1 and T2)
ITS-90
Applicable
NIST-175
Standards
Accuracy is specified for ambient temperatures between 18 oC
o
(64
F) and 28 oC (82 oF) for a period of 1 year. The above
specifications do not include thermocouple error.
Replacement Parts and Accessories
Accessory Part Number
Holster and Flex Stand Assembly 1272438
AA NEDA 15A IEC LR6 batteries 376756
80PK-1 K-Type Bead Thermocouple 773135
CD-ROM 1276106
Service Manual 1276123
FlukeView Forms FVF-SC2
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