Troubleshooting

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.

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 Ω 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.