FLUKE-52-2 60HZ - Fluke Electronics

51 & 52 Series II

Thermometer

Users Manual

English

September 1999 Rev.1, 6/01

All product names are trademarks of their respective companies.

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 war-

ranty does not cover fuses, disposable batteries or damage from accident, neglect, misuse or abnormal conditions of opera-

tion 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 Corporati on

P.O. Box 9090

Everett WA

98206-9090

Fluke Europe B.V.

P.O. Box 1186

5602 B.D. Eindhoven

The Netherlands

To register your product, visit www.fluke-warranty.com

10/96

i
Table of Contents
Title Page
Introduction....................................................................................................................1
Contacting Fluke....................................................................................................... 1
Getting Started............................................................................................................... 4
Components.............................................................................................................. 5
Display Elements...................................................................................................... 6
Buttons...................................................................................................................... 7
Using the Thermometer................................................................................................. 9
Changing Setup Options ................................................................................................ 9
Entering or Exiting Setup.......................................................................................... 9
Setup Options........................................................................................................... 9
Changing a Setup Option.......................................................................................... 10
Measuring Temperatures ............................................................................................... 11
Connecting a Thermocouple..................................................................................... 11
Displaying Temperatures.......................................................................................... 11
Holding the Displayed Readings............................................................................... 12
Viewing the MIN, MAX, and AVG Readings.............................................................. 12
Using the Offset to Adjust for Probe Errors.................................................................... 12

51 & 52 Series II
Users Manual
ii
Maintenance................................................................................................................... 13
Replacing the Batteries ............................................................................................. 13
Cleaning the Case and Holster.................................................................................. 13
Calibration ................................................................................................................. 13
Specifications................................................................................................................. 13
Environmental............................................................................................................ 13
General...................................................................................................................... 14
80 PK-1 Thermocouple (supplied with thermometer) ................................................ 14
Electrical.................................................................................................................... 14
Replacement Parts and Accessories.............................................................................. 15

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 E-

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 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 www.fluke-warranty.com

51 & 52 Series II

Users Manual

Table 1. Safety Information

WWarning

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.

51 & 52 Series II

Introduction

Table 1. Safety Information (cont.)

WWarning (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.

51 & 52 Series II

Users Manual

Table 2. International Symbols

WRefer to the manual for information about this

feature. PComplies with European Union directives.

MBattery. 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.

51 & 52 Series II

Getting Started

Components

512

aas01f.eps

Figure 1. Components

Table 3. Components

AThermocouple T1 input

Model 52:

Thermocouple T2 input

CHolster

DDisplay

EButtons

FBattery door

GBatteries

51 & 52 Series II

Users Manual

Display Elements

2345

aas02f.eps

Figure 2. Display Elements

Table 4. Display Elements

AThe thermocouple measurement includes an

offset. See "Changing Setup Options."

BThe displayed readings do not change.

CA shift function is in progress.

DSetup is in progress.

ELow battery. Replace the batteries.

FPrimary Display.

Model 51

: T1 reading.

Model 52:

T1, T2, or T1-T2 reading.

GThe temperature unit.

HSecondary Display: MAX, MIN, AVG, or offset.

Model 52:

T1or T2 reading.

IThe thermocouple type.

JTime Display: The elapsed time.

51 & 52 Series II

Getting Started

Buttons

Table 5. Buttons

APress A to turn the thermometer on or off.

(Shift

function)

Press G, M (CANCEL) to stop displaying the minimum, maximum, and average readings in the

secondary display.

QPress 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.

MPress M to step through the maximum, minimum, and average readings. When viewing logged

readings, shows the maximum, minimum, and average of the logged readings.

Press G, M (CANCEL) to turn off this display.

CPress C to switch between Celsius (oC), Fahrenheit (oF), and Kelvin (K).

hPress 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.

51 & 52 Series II

Users Manual

Table 5. Buttons (cont.)

DPress D to start or exit Setup. (See "Changing Setup Options.")

KPress K to scroll to the Setup option you want to change.

Press K to increase the displayed setting.

NPress N to scroll to the Setup option you want to change.

Press N to decrease the displayed setting.

EPress E to enter a Setup option.

Press E again to store the displayed setting in memory.

51 & 52 Series II

Using the Thermometer

1. Plug the thermocouple(s) into the input connector(s).

2. Press

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.

Entering or Exiting Setup

When the thermometer is in Setup mode, the display

shows s.

• Press

D to start or exit Setup.

Setup Options

Option Menu

Item Settings

Thermocouple

Type TYPE J, K, T, or E

Offset OT1 or T2 (Model 52)

Sleep Mode SLP on (sleep mode on)

or 0FF (sleep mode

off)

Line Frequency Li ne 50 H (50 Hz)

or 60 H (60 Hz)

51 & 52 Series II

Users Manual

Changing a Setup Option

1. Press K

or N to scroll to the setup option you

want to change.

2. Press

E to indicate that you want to change this

setting.

3. Press

or N until the setting you want to use

appears on the display.

4. Press

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.

51 & 52 Series II

Measuring Temperatures

Connecting a Thermocouple

To change the thermocouple type, see “Changing Setup

Options.” The North American ANSI Color Code is:

Type JKETN

Color Black Yellow 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.

Model 52:

Press T to toggle between showing the

T1, T2, and T1-T2 readings in the primary or

secondary display.

Notes

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 52: If only thermocouple T2 is connected,

the T2 reading appears in the primary display.

51 & 52 Series II

Users Manual

Holding the Displayed Readings

1. Press h to freeze the readings on the display.

The display shows H.

Model 52:

Press T to toggle showing the T1, T2, or

T1-T2 readings in the primary or secondary display.

3. Press

h again to turn off the HOLD function.

Viewing the MIN, MAX, and AVG Readings

1. Press 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.

2. Press

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 oC or K, and

± 9.0 oF.

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.")

51 & 52 Series II

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

Operating

Temperature −10 oC to 50 oC

(14 oF to 122 oF)

Storage

Temperature −40 oC to +60 oC

(−40 oF to +140 oF)

Humidity Non condensing <10 oC (<50 oF)

95% RH: 10 oC to 30 oC (50 oF to 86 oF)

75% RH: 30 oC to 40 oC (86 oF to 104 oF)

45% RH: 40 oC to 50 oC (104 oF to 122 oF)

51 & 52 Series II

Users Manual

General

Weight 280 g (10 oz)

Dimensions

(without

holster)

2.8 cm × 7.8 cm × 16.2 cm

(1.1 in × 3 in × 6.4 in)

Battery 3 AA batteries

Certification P, ) s

Safety 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. Equi pm ent of OVE RVOLTA GE CATEGORY I is

equipment for connec ti on to circuits in which measures are

taken to limit the transient over voltages to an appropriate low

level. Example include protect elect ronic ci rcuits.

80 PK-1 Thermocouple (supplied with

thermometer)

Type Type K, Chromel Alumel, bead style

Temperature

Range −40 oC to +260 oC

(−40 oF to +500 oF)

Accuracy ± 1.1 oC (± 2.0 oF)

Electrical

Measurement

Range J-type: −210 oC to +1200 oC

(−346 oF to + 219 2 oF)

K-type: −200 oC to +1372 oC

(−328 oF to +2501 oF)

T-type: −250 oC to +400 oC

(−418 oF to +752 oF)

E-type: −150 oC to +1000 oC

(−238 oF to +1832 oF)

Display

Resolution 0.1 oC / oF / K < 1000o

1.0 oC / oF / K ≥ 1000 o

51 & 52 Series II

Replacement Parts and Accessories

Electrical (cont.)

Measurement

Accuracy, T1,

T2, or T1-T2

(Model 52)

J-, K-, T-, and E-type: ±[0.05 % of

reading + 0.3 oC (0.5 oF)]

[below −100 oC (−148 oF): add 0.15 %

of reading for J-, K-, E-, and N-ty pe;

and 0.45 % of reading for T-type]

Temperature

Coefficient 0.01 % of reading + 0.03 oC per oC

(0.05 oF per oF) outside the

specified +18 oC to 28 oC (+64 oF

to +82 oF) range

[below −100 oC (−148 oF): add

0.04 % of reading for J-, K-, E-, and

N-type; and 0.08 % of reading for

T-type]

Electromagnetic

Compatibility 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.

Emmisi ons: Commercial Limits per

EN50081-1

Maximum

Differential

Common Mode

Voltage

1 V (Maximum voltage difference

between T1 and T2)

Temperature

Scale ITS-90

Applicable

Standards NIST-175

Accuracy is specified for ambient temperatures

between 18 oC (64 oF) 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

51 & 52 Series II

Users Manual