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English
September 1999 Rev.1, 6/01
© 1999-2001 Fluke Corporation, All rights reserved. Printed in USA
All product names are trademarks of their respective companies.
51 & 52 Series II
Thermometer
®
Users Manual
Limited Warranty & Limitation of Liability
This Fluke product will be free from defects in material and workmanship for 3 years from the date of purchase. This warranty does not cover fuses, disposable batteries or damage from accident, neglect, misuse 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, send your defective tester to the nearest Fluke Authorized 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
To register your product, visit www.fluke-warranty.com
Fluke Europe B.V.
P.O. Box 1186
5602 B.D. Eindhoven
The Netherlands
10/96
Table of Contents
i
Title Page
51 & 52 Series II
Users Manual
80 PK-1 Thermocouple (supplied with thermometer) ................................................ 14
ii
51 & 52 Series II
Introduction
The Fluke Model 51 and Model 52 Thermometers (“the thermometer”) are microprocessor-based, digital thermometers designed to use external J-, K-, T-, and Etype 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 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
P.O. Box 9090
Fluke Europe B.V.
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 www.fluke-warranty.com
1
51 & 52 Series II
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 (
B
) appears. The possibility of false readings 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.
•
Do not operate the thermometer around explosive gas, vapor, or dust.
•
Do not apply more than the rated voltage, as marked on the thermometer, between the thermocouple(s), or
between any thermocouple and earth ground.
2
51 & 52 Series II
Introduction
Table 1. Safety Information (cont.)
W
Warning (cont.)
•
Model 52: 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.
3
51 & 52 Series II
Users Manual
W
M
Table 2. International Symbols
Refer to the manual for information about this feature.
Battery.
P
Complies with European Union directives.
Complies with relevant Canadian Standards
Association directives.
Getting Started
Everything in this Users Manual applies both to Models
51 and 52 unless otherwise indicated.
To become familiar with the thermometer, study the following:
•
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.
4
Components
5
4
3
7
6
Figure 1. Components
aas01f.eps
1
2 xx
51 & 52 Series II
Getting Started
Table 3. Components
A
Thermocouple T1 input
B
Model 52: Thermocouple T2 input
C
Holster
D
Display
E
Buttons
F
Battery door
G
Batteries
5
51 & 52 Series II
Users Manual
Display Elements
2
3
4
5
1
10
9
Figure 2. Display Elements
6
7
8 aas02f.eps
xx
Table 4. Display Elements
A
The thermocouple measurement includes an offset. See "Changing Setup Options."
B
The displayed readings do not change.
C
A shift function is in progress.
D
Setup is in progress.
E
Low battery. Replace the batteries.
F
Primary Display.
Model 51: T1 reading.
Model 52: T1, T2, or T1-T2 reading.
G
The temperature unit.
H
Secondary Display: MAX, MIN, AVG, or offset.
Model 52: T1or T2 reading.
I
The thermocouple type.
J
Time Display: The elapsed time.
6
51 & 52 Series II
Getting Started
Buttons
Table 5. Buttons
A
G
Press
A
to turn the thermometer on or off.
Press
G
,
M
(CANCEL) to stop displaying the minimum, maximum, and average readings in the secondary display.
(Shift function)
Q
Press
Q
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.
M
Press
M
to step through the maximum, minimum, and average readings. When viewing logged readings, shows the maximum, minimum, and average of the logged readings.
C h
T
Press
G
,
M
(CANCEL) to turn off this display.
Press
C
to switch between Celsius ( o
C), Fahrenheit ( o
F), and Kelvin (K).
Press h
to freeze or unfreeze the displayed readings.
Press h
when turning on the thermometer to test the display. All display elements appear.
Model 52: Press
T
to toggle showing the T1, T2, and T1-T2 (differential temperature measurement) in the primary or secondary display.
7
51 & 52 Series II
Users Manual
D
K
N
E
Table 5. Buttons (cont.)
Press
D
to start or exit Setup. (See "Changing Setup Options.")
Press
K
to scroll to the Setup option you want to change.
Press
K
to increase the displayed setting.
Press
N
to scroll to the Setup option you want to change.
Press
N
to decrease the displayed setting.
Press
E
to enter a Setup option.
Press
E
again to store the displayed setting in memory.
8
Using the Thermometer
1. Plug the thermocouple(s) into the input connector(s).
A
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 thermocouple type, offset, sleep mode, 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.
51 & 52 Series II
Using the Thermometer
Entering or Exiting Setup
When the thermometer is in Setup mode, the display shows s
.
• D
to start or exit Setup.
Setup Options
Option
Thermocouple
Type
Menu
Item
TYPE
Settings
J, K, T, or E
Offset
Sleep Mode
O
SLP
T1 or T2 (Model 52) on
(sleep mode on) or
0FF
(sleep mode off)
Line Frequency
Li ne
50 H (50 Hz) or 60 H (60 Hz)
9
51 & 52 Series II
Users Manual
Changing a Setup Option
K
or
N
to scroll to the setup option you want to change.
E
to indicate that you want to change this setting.
K
or
N
until the setting you want to use appears on the display.
E
to store the new setting in memory.
Notes
Setup is disabled in MIN MAX mode.
Offset:
The primary display shows the temperature plus the offset and the secondary display shows the offset. 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. Model 52: You can store individual offsets for T1 and T2.
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. Sleep mode becomes enabled each time you turn on the thermometer and is automatically disabled in MIN MAX mode.
Line frequency:
For optimum rejection of line noise, the thermometer must be set for the local line frequency.
10
Measuring Temperatures
Connecting a Thermocouple
To change the thermocouple type, see “Changing Setup
Options.” The North American ANSI Color Code is:
Type
Color
J K
Black Yellow
E T N
Purple Blue Orange
1. Plug a thermocouple into the input connector(s).
(Make sure that the polarity is correct.)
2. Set the thermometer for the correct thermocouple type.
Displaying Temperatures
1. Press
C
to select the correct temperature scale.
2. Hold or attach the thermocouple(s) to the measurement location.
The temperature reading appears in the primary display.
3. Model 52: Press
T
to toggle between showing the
T1, T2, and T1-T2 readings in the primary or secondary display.
51 & 52 Series II
Measuring Temperatures
Notes
The display shows "- - - -" when a thermocouple is not connected.
The display shows
0L
(overload) when the temperature being measured is outside the thermocouple’s valid range.
Model 52: If only thermocouple T2 is connected, the T2 reading appears in the primary display.
11
51 & 52 Series II
Users Manual
Holding the Displayed Readings
h
to freeze the readings on the display.
The display shows
H
.
2.
Model 52: Press
T
to toggle showing the T1, T2, or
T1-T2 readings in the primary or secondary display.
h
again to turn off the HOLD function.
Viewing the MIN, MAX, and AVG Readings
M
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.
G
,
M
(CANCEL) to exit MIN MAX mode.
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.
The allowable adjustment range is
±
5.0 o
C or K, and
±
9.0 o
F.
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.")
12
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.
51 & 52 Series II
Maintenance
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
Operating
Temperature
−
10 o
C to 50
o
C
(14
o
F to 122
o
F)
Storage
Temperature
Humidity
−
40
o
C to
+
60
o
C
(
−
40
o
F to
+
140
o
F)
Non condensing <10
o
C (<50
o
F)
95% RH: 10
o
C to 30
o
C (50
o
F to 86
o
F)
75% RH: 30
o
C to 40
o
C (86
o
F to 104
o
F)
45% RH: 40
o
C to 50
o
C (104
o
F to 122
o
F)
13
51 & 52 Series II
Users Manual
General
Weight
Dimensions
(without holster)
Battery
280 g (10 oz)
2.8 cm
×
7.8 cm
×
16.2 cm
(1.1 in
×
3 in
×
6.4 in)
Certification
Safety
3 AA batteries
P
,
) s
CSA C22.2 No. 1010.1 1992
EN 61010 Amendments 1, 2
CAT I
OVERVOLTAGE (Installation)
CATEGORY I, Pollution Degree 2 per IEC1010-1*
*
Refers to the level of Impulse Withstand Voltage protection provided. Equipment of OVERVOLTAGE CATEGORY I is equipment for connection to circuits in which measures are taken to limit the transient over voltages to an appropriate low level. Example include protect electronic circuits.
80 PK-1 Thermocouple (supplied with thermometer)
Type
Temperature
Range
Accuracy
Type K, Chromel Alumel, bead style
−
40 o
C to
+
260 o
C
(
−
40 o
F to
+
500 o
F)
±
1.1 o
C (
±
2.0 o
F)
Electrical
Measurement
Range
Display
Resolution
J-type:
−
210
(
−
346 o
C to
+
1200 o
F to
+
2192 o
F) o
C
K-type:
−
200 o
C to
+
1372 o
C
(
−
328 o
F to
+
2501 o
F)
T-type:
−
250 o
C to
+
400 o
C
(
−
418 o
F to
+
752 o
F)
E-type:
−
150 o
C to
+
1000 o
(
−
238 o
F to
+
1832 o
F)
C
0.1 o
C / o
1.0 o
C / o
F / K
<
1000 o
F / K
≥
1000 o
14
Electrical (cont.)
Measurement
Accuracy, T1,
T2, or T1-T2
(Model 52)
Temperature
Coefficient
Electromagnetic
Compatibility
Maximum
Differential
Common Mode
Voltage
Temperature
Scale
J-, K-, T-, and E-type: reading
+
0.3 o
C (0.5 o
±
[0.05
F)]
%
of
[below
−
100 o
C (
−
148 o
F): add 0.15 % of reading for J-, K-, E-, and N-type; and 0.45 % of reading for T-type]
0.01
%
(0.05 o
of reading
F per o specified
+
18
+
0.03
o
C to 28 o
C per o
F) outside the o
C (
+
64
o
F
C to
+
82
[below o
−
F) range
100 o
C (
−
148 o
F): add
0.04 % of reading for J-, K-, E-, and
N-type; and 0.08 % of reading for
T-type]
Susceptibility:
±
2
o
C (
±
3.6
o
F) 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
Standards
NIST-175
Accuracy is specified for ambient temperatures between 18 o
C (64 o
F) and 28 o thermocouple error.
o
C (82 F) for a period of
1 year. The above specifications do not include
51 & 52 Series II
Replacement Parts and Accessories
Replacement Parts and Accessories
Accessory Part Number
Holster and Flex Stand
Assembly
AA NEDA 15A IEC LR6 batteries
1272438
376756
80PK-1 K-Type Bead Thermocouple
CD-ROM
Service Manual
773135
1276106
1276123
15
51 & 52 Series II
Users Manual
16
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Fluke
:
FLUKE-52-2 60HZ
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