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PN 735985 February 1985 Rev.6, 11/02
©1985-2002 Fluke Corporation. All rights reserved. Printed in USA All product names are trademarks of their respective companies.
Introduction
The Fluke 80TK is a thermocouple converter for use with any
K-type thermocouple and a digital multimeter. The 80TK
accepts the output of any K-type thermocouple and converts it
to 1 millivolt per degree (Celsius or Fahrenheit).
A three-position switch acts as a power switch as well as
selecting Fahrenheit or Celsius scaling for the output. In
addition, the OFF position of the power switch allows you to
read the battery condition via the external multimeter. The
thermocouple input accepts wire leads or standard mini-
thermocouple connectors.
Temperature is measured by exposing or attaching the
thermocouple to the surface to be measured. The multimeter
displays the temperature directly in degrees Fahrenheit or
Celsius.
Specifications
Electrical
Measurement Range: -50 to 1000 degrees Celsius
-58 to 1832 degrees Fahrenheit
Resolution:
2000 count display: 0.1° C/F in 200 mV range
1.0° C/F in 2V range
3200 count display: 0.1 C/F in 300 mV range
1.0 C/F in 3V range
4000 count display: 0.1° C/F in 400mV range
1.0° C/F in 4V range
Note: Ignore decimal point on 2V, 3V, or 4V range.
Maximum Voltage at Thermocouple Input: 60V DC, 24V AC
RF Field: Exposure to an RF field interferes significantly with
this module’s capacity to accurately measure temperature with
thermocouples. The interference is temporary and the module
suffers no harm when exposed to an RF field of 3 V/m.
Accurate temperature measurement capability is completely
restored when the module is removed from the RF field.
Common sources of RF fields are handheld 2-way radios and
cellular telephones. If such a source is suspected of interfering
with this module, either turn off the transmitter or increase the
separation between the transmitter and the module.
Environmental
Ambient Operating Range: 0 to 50°C
Storage Temperature: -40 to 60°C
-40 to 140°F
Humidity: 0% to 90% (0 to 35°C)
0% to 70% (35 to 50°C)
Basic Accuracy: (@ 23 ±5°C Calibration)*
(Applies for one year after purchase or recalibration)
RANGE ACCURACY ± (% of reading +
degrees), 1 year
-20 to 350°C 0.5% ± 2°C
-4 to 662°F 0.5% ± 3.6°F
351 to 500°C† 1.75% ± 2°C
664 to 932°F†* 1.75% ± 3.6°F
501 to 1000°C 2.0% ± 2°C
933 to 1832°F 2.0% ± 3.6°F
-50 to -21°C 2.5% ± 2°C typical
-58 to -5.8°F 2.5% ± 3.6°F typical
Temperature Coefficient:
* 0°C to 18°C and 28°C to 50°C ambient, multiply the basic
accuracy specification by 0.1 for each degree above 28 or
below 18.
† For accuracy enhancement between 351°C to 500°C,
subtract 3 degrees from the reading. The accuracy is now
0.75% ± 2°C.
†* For accuracy enhancement between 663°F and 932°F,
subtract 5.4 degrees from the reading. The accuracy is now
0.75% ± 3.6°F.
Note
The basic accuracy specification does not include the
error of the probe or the DMM. Please refer to the
probe accuracy specification for additional details.
General
Weight: 4.5 ounces, 126 grams
Overall length: 4 5/8 inches, 11.75 mm
Battery: Standard 9V Battery (NEDA #1604, 6F22, 006P)
Battery Life: 1600+ hours, 6.5V minimum
Output: 3/4 inch spaced banana plugs, 10 megohm minimum
load resistance
Accessories
80PK-1 (included): Bead Probe 4 foot K-type thermocouple
bead probe, with Teflon tape insulation. Maximum insulation
temperature: 260°C. Accuracy: ± 2.2°C or ± 0.75% (whichever
is greater) from 0 to 800°C.
80PK-2A: Immersion Probe (8" or 20.32 cm from tip to probe
handle)
80PK-3A: Surface Probe (for flat or curved surfaces)
80PK-4A: Air Probe (protected by stainless steel baffle)
80PK-5A: Piercing Probe (suitable for food use, liquids and
gels)
80PK-6A: Exposed Junction Probe (exposed bead attached to
6" sheath)
®
80TK Thermocouple
Module
Instruction Sheet