Fluke 80PT-25 Instructions

®

80PT-25

SureGripTM Piercing

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 80PT-25 SureGripTM Piercing Temperature Probe is
designed for use in liquids, gels, soft, and semi-hard
materials. The probe is made of 316 stainless steel, which
is suitable for food service use. The thermocouple junction
of the probe is protected from tip to handle by the stainless
steel sheath. The 40-inch (1-meter) cable is terminated
with a Type T miniature thermocouple connector with

0.792-mm (.312-inch) pin spacing. The 80PT-25 can be
used with any temperature-measuring instrument that is
designed to accept Type T thermocouples and has a
miniature connector input.

Specifications

Type

T, Copper/Constantan

Measurement Range of Stainless Steel Probe

-196 °C to 350 °C (-320.8 °F to 662 °F)

Accuracy

(With respect to ANSI MC96.1 Standard Limits of Error)

-196 °C to -150 °C
(-320.8 °F to -238 °F)

-150 °C to -40 °C
(-238 °F to -40 °F)

-40 °C to 0 °C
(-40 °F to 32 °F)

0 °C to 350 °C
(32 °F to 662 °F)

Note

All error calculations should be done in

°

then scaled to

Range Accuracy

F.

(% of reading)

±3 %

±2 °C

±1 °C

Max

(±1 °C, ±0.75 % of reading)

°

C and

November 2004

© 2004 Fluke Corporation. All rights reserved.
All product names are trademarks of their respective companies

Output

@ 25 °C (77 °F) =1.00 mV (reference junction at 0 °C)
Seebeck Coefficient @ 25 °C (77 °F) = 40.50 µV / °C

Measurement Time (Time Constant): 3.0 seconds in 100

°C still water at sea level pressure (5 time

constants = 1 complete step change, i.e., 5 seconds)

Maximum Voltage 24 V ac rms or 60 V dc

Maximum Temperature of Tip 816 °C (1500 °F)

Sheath

Material: 316 Stainless Steel Dimensions

Diameter: 3.4036 mm (.134 in)

Length: 10.16 cm (4 in)

Tip: 25 ° conical

Grounding Junction welded to sheath

Cable

Length: 40 inches (1 meter)

Insulation

Material: PVC

Maximum Temperature: 105 °C (221 °F)

Jacket Color: Gray

Food Service Limitation: The cable should not come in
contact with food.

Conductors

Type: T

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

Handle

Material: Hytrel (food service grade)

Maximum Temperature of Food in Contact with Handle:

65 °C (150 °F)

Connector

Type: Mini-thermocouple connector with .792 mm
(.0312 in) pin spacing

Material: Blue Hytrel (food service grade)

Maximum Temperature: 125 °C (257 °F)

Overall Probe Length 22.23 cm (8.75 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 80PT-25 is compatible with any temperature­measuring instrument that 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 80PT-25 accuracy specification to
determine the overall accuracy of the combination.

Temperature Limitations

The tip of the 80PT-25 has a continuous temperature

rating of 350 °C (662 °F). However the opposite end of the

sheath nearest the handle should not be subjected to

temperatures greater than 125 °C. This is the maximum

temperature limitation of the Hytrel handle. See Food
Service Limitations.

Exposure Limitations

The sheath material of the 80PT-25 is stainless steel. It
should not be exposed to halides or sulfides.

Food Service Limitations

The 316 stainless steel probe is suitable for contact with
hot or cold foods within the specified temperature range of
the probe. However the handle is made of Hytrel 5556
which is suitable for repeat food contact only under the

following conditions: food temperature under 65 °C
(150 °F), food alcohol content under 8 %. Food may be

wet, dry, or fatty. Also, the cable should not come in
contact with food.

Operation

Use the 80PT-25 as follows:

1. Connect the 80PT-25 to a compatible Type T
measuring instrument using the miniature (0.312 inch
spacing) thermocouple connector.

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”.

Measuring Technique

The 80PT-25 should be inserted at least 31.75 mm
(1.25 in) into the substance to be measured to minimize
the shunting effect of the sheath.

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 measuring instrument is designed to be
used with Type T thermocouples. The measuring
instrument should have a blue input connector
and / or be marked with a “T”.

2. Check for an open circuit indicator on the measuring­instrument. 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 probe 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

Diameter: .134" (3.4036 mm)

Figure 1. 80PT-25

4" (101.6 mm)

bad01f.eps

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: [phone]
Japan: [phone]
Singapore: [phone]
Anywhere in the world: [phone]

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.

11/99

Fluke Europe B.V.
P.O. Box 1186
5602 BD Eindhoven
The Netherlands

.