80PK-26 - Fluke Electronics - Datasheet.Directory

80PK-26

SureGripTM Tapered

Temperature Probe

Instruction Sheet

XWWarning

To avoid electrical shock, do not use this

probe when voltages exceeding 24 V ac rms

or 60 V dc are present. The probe tip is

electronically connected to the output

terminals.

Introduction

The 80PK-26 SureGripTM Tapered Temperature Probe is

essentially a bead probe with a handle that can be used

as a surface probe. The stainless steel sheath allows the

bead to measure temperatures higher than bead probes

with flexible leads. The handle also allows you to apply

more focused surface pressure without having your hand

in close proximity to the source. The 40-inch (1-meter)

cable is terminated with a Type K miniature thermocouple

connector with 0.792-mm (.312-in) pin spacing. The

80PK-26 can be used with any temperature-measuring

instrument that is designed to accept Type K

thermocouples and has miniature connector input.

Specifications

Type

K Standard Grade Ni-Cr vs Ni-Al (Chromel vs Alumel)

Measurement Range

-40 °C to 816 °C (-40 °F to 1500 °F)

Accuracy

(With respect to ANSI MC96.1-1982-Standard Limits of

Error):

Note

All error calculations should be done in

C, then

scaled to

Range Accuracy

(% of reading)

-40 °C to 0 °C

(-40 °F to 32 °F)

±2.2 °C

0 °C to 275 °C

(32 °F to 527 °F)

±1.1 °C

275 °C to 816 °C

(527 °F to 1500 °F)

±0.4 %

November 2004

All product names are trademarks of their respective companies

Output

@ 25 °C (77 °F) = 1.00 mV (reference junction @ 0 °C)

Seebeck Coefficient

25 °C (77 °F) = 40.50 µV / °C

Measurement Time

(Time Constant): 3.0 seconds for air moving at 3.33

meters / second (10.9 feet / second) at sea level pressure

(5 time constants = 1 complete step change, i.e., 15

seconds)

Maximum Voltage

24 V ac rms or 60 V dc

Maximum Temperature of Tip

816 °C (1500 °F)

Sheath

Material: 304 Stainless Steel

Dimensions

Diameter: 4.8 mm (.19 in)

Length: 20.32 cm (8 in)

Bead (sensor) Sheath

Material: Inconel 600

Dimensions

Diameter: 1.5748 mm (.062 in)

Length: 11.049 mm (.435 in)

Grounding

Junction Welded to Sheath.

Cable

Length: 1 meter (40 in)

Insulation

Material: PVC

Maximum Temperature: 105 °C (220 °F)

Jacket Color: Gray

Conductors

Type: K

Size: AWG #24 stranded (7 strands of #32)

Handle

Material: Hytrel

Maximum Temperature: 125 °C (257 °F)

Connector

Type: Mini-thermocouple connector with .792 mm

(.0312 in) pin spacing

Material: Yellow Hytrel

Maximum Temperature: 1.25 °C (257 °F)

Overall Probe Length

31.9 cm (12.55 in) from tip to end of cable strain relief.

Protection

Class 3. Relates solely to insulation and grounding

properties defined in IEC 348.

Measurement Considerations

Instrument Compatibility

The 80PK-26 is compatible with any temperature-

measuring instrument that’s accepts Type K

thermocouples, has a miniature thermocouple connector,

and has cold reference junction compensation. Accuracy

of the temperature-measuring instrument must be

considered along with the 80PK-26 accuracy specification

to determine the overall accuracy of the combination.

Temperature Limitations

The tip area (thermocouple-sheath) of the 80PK-26 has a

continuous temperature rating of 816 °C (1500 °F).

However, the opposite end of the sheath nearest the

handle should not be subjected to temperatures greater

than 125 °C (257 °F). This is the maximum temperature

limitation of the handle.

Media Limitations

The stainless steel sheath should not be exposed to

halides or sulfides. Even though the sheath to junction

transition is sealed, it is not recommended to immerse the

probe in liquid or saturated vapor. The 80PK-26 should not

be used in reducing atmospheres or in a vacuum. Excess

mounting force can deform or crush the bead. With the

probe perpendicular to the measurement surface, do not

apply more than 12.25 new tons (2.75 pounds-force). Use

proportionally less force as the angle to the measurement

surface becomes more acute.

Operation

Use the 80PK-26 as follows:

1. Using the miniature (0.312 inch spacing)

thermocouple, connect the 80PK-26 to a compatible

Type K temperature-measuring instrument.

2. Turn on the measuring instrument, and select the

appropriate range and scale.

3. Check the read out on the measuring instrument. With

no heat or cold source applied to the bead, the

measuring instrument should display the ambient

(room) temperature. If the instrument does not read

out properly, refer to “Troubleshooting”.

Minimizing Thermal Shunting

The 80PK-26 Tapered Temperature Probe should be

inserted at least 6.35 cm (2.5 in) into the environment to

be measured to minimize the shunting effect of the sheath.

Measuring Technique

Here are some suggestions for improving the accuracy of

your temperature measurements:

1. Make sure there is a good connection between

the probe and the surface you are measuring by

doing any of the following:

a. Increase the mounting pressure

b. Use an interface agent (such as silicone grease)

between the thermocouple probe and the surface

you are measuring.

c. Use a thermal epoxy to attach the thermocouple.

2. When measuring higher than ambient temperatures,

adjust the connection between the probe and the

surface until you get the highest temperature reading.

To ensure a good connection, see the suggestions

above.

3. When measuring lower than ambient temperatures,

adjust the connection between the probe and the

surface until you obtain the lowest temperature

reading. To ensure a good connection, see the

suggestions above.

4. When measuring near ambient temperatures, make

the reading when the multimeter when the multimeter

read-out is most stable.

Troubleshooting

With no heat or cold applied to the probe, the measuring

instrument should display the ambient temperature. If the

measuring instrument does not read out properly, try the

following:

1. Verify that the temperature-measuring instrument is

designed to be used with Type K thermocouples. The

temperature-measuring instrument should have a

yellow input connector and / or be marked with a “K”.

2. Check for an open circuit indicator on the measuring

instrument. Some temperature measuring instruments

have a built-in circuit to indicate if the connected

probe is open. (All Fluke Temperature-measuring

instruments have this feature.) Refer to the owner’s

manual accompanying the measuring instrument to

see if this feature is available.

3. Short the two input pins of the measuring instrument

with a piece of wire. If the instrument is functioning, it

should indicate the ambient temperature.

4. If you suspect a broken connection, use an ordinary

ohmmeter to read the continuity of the measuring

instrument from pin to pin. The ohmmeter should read

20 ohms or less if there is continuity.

Scale Conversions

Use the following equation to convert °C to °F:

(°C x 1.8) + 32 = °F

Use the following equation to convert °F to °C:

(°F –32) x 0.5556 = °C

8" (203.2 mm)

Diameter: .125" (3.175 mm)

Tip Diameter: .062" (1.5748 mm)

.435" (11.049 mm)

baj01f.eps

Figure 1. Fluke 80PK-26

Contacting Fluke

For application or operation assistance, or information on

Fluke products, call:

USA: 1-888-44-FLUKE (1-888-443-5853)

Canada: 1-800-36-FLUKE (1-800-363-5853)

Europe: +31 402-675-200

Japan: +81-3-3434-0181

Singapore: +65-738-5655

Anywhere in the world: +1-425-446-5500

For USA Service: 1-888-99-FLUKE

(1-888-993-5853)

Or, visit Fluke's Web site at www.fluke.com.

To register your product, visit register.fluke.com

ONE YEAR LIMITED WARRANTY

This Fluke product will be free from defects in material and

workmanship for one year 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.

Fluke Europe B.V.

P.O. Box 1186

5602 BD Eindhoven

The Netherlands

11/99