Fluke Thermometer 80PK 1 User Manual

Instruction Sheet  
80PK-1  
WARNING  
TO AVOID ELECTRICAL SHOCK, DO NOT USE THIS PROBE  
WHEN VOLTAGES EXCEEDING 24V AC RMS OR 60V DC ARE  
PRESENT. THE PROBE TIP IS ELECTRICALLY CONNECTED  
TO THE OUTPUT TERMINALS.  
INTRODUCTION  
The 80PK-1 is a Type K Bead Thermocouple designed for  
general purpose temperature measuring applications. It has an  
extremely fast response time, due to the low thermal mass of the  
exposed tip. The 40-inch (1-meter) Teflon cable is terminated with  
a Type K miniature thermocouple connector with 0.312-inch  
(0.792-mm) pin spacing. The 80PK-1 can be used with any  
temperature measuring instrument that is designed to accept  
Type K thermocouples and that has a miniature connector input.  
The 80PK-1 must be used in Teflon-compatible environments and  
is not suitable for liquid immersion. Above 260°C (500°F), Teflon  
will emit toxic fumes.  
SPECIFICATIONS  
Type: K Special Grade (Chromel vs Alumel)  
Measurment Range: -40°C to 260°C (-40°F to 500°F)  
continuous  
Accuracy (with respect to NBS tables for Special Grade): ±1.1°C  
(2.0°F) over the range of 0°C to 260°C (32°F to 500°F) Typically  
within 1.1°C (2.0°F) of NBS Tables over the range of -40°C to  
0°C (-40°F to 32°F)  
March, 1985 Rev.3, 4/02  
©1989-2002 Fluke Corporation. All Rights Reserved. Printed in U.S.A.  
All product names are trademarks of their respective companies  
 
junction compensation. Accuracy of the temperature measuring  
instrument must be considered along with the 80PK-1 accuracy  
specification in order to determine the overall accuracy of the  
combination.  
Temperature Limitations  
The 260°C continuos temperature rating of the 80PK-1 is  
primarily determined by the Teflon insulation. The bead alone  
may be momentarily subjected to higher temperatures without  
damage.  
Media Limitations  
Type K Chromel-Alumel thermocouple wires are compatible with  
clean oxidizing atmospheres.  
OPERATION  
Caution  
Repeated sharp bending can break the 80PK-1 lead.  
To protect the lead, avoid sharp bends, especially  
near the connector.  
Use the 80PK-1 as follows:  
1. Connect the 80PK-1 to a compatible Type K  
temperature measuring instrument using the miniature  
(0.312-inch pin spacing) thermocouple connector.  
2. Turn on the measuring instrument and select the  
appropriate range and scale.  
3. Check the readout on the measuring instrument. With  
no heat or cold source applied to the bead, it should  
display the ambient (room) temperature. If the  
instrument does not readout properly, refer to the  
TROUBLESHOOTING section below.  
MEASURING TECHNIQUE  
Here are some suggestions for improving the accuracy of your  
temperature measurements:  
1. Make sure that 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 obtain 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 get 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 readout is most stable.  
TROUBLESHOOTING  
With no heat or cold applied to the bead, the measuring  
instrument should display the ambient temperature. If the  
measuring instrument does not readout properly, try the following:  
1. Verify that the temperature measuring instrument is  
designed to be used with Type K thermocouples. It  
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 instruments have this feature.) Refer  
to the measuring instrument’s owner’s manual to see if  
this feature is available.  
If you suspect a broken connection, use an ordinary  
ohmmeter to check its continuity from pin to pin. The  
ohmmeter should read 10 or less if there is  
continuity.  
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.  
 

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