Fluke 80TK - User Manual

PN 735985 February 1985 Rev.8, 7/07
©1985-2007 Fluke Corporation. All rights reserved. Printed in USA All product names are trademarks of their respective companies.
80TK
THER
MOCOUPLE M
ODULE
C
F
O
FF
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 mV 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 2 V 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 400 mV range
1.0 °C/F in 4 V range
Note: Ignore decimal point on 2 V, 3 V, or 4 V range.
Maximum Voltage at Thermocouple Input: 60 V 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 oz, 126 g
Overall length: 4 5/8 in, 11.75 mm
Battery: Standard 9 V Battery (NEDA #1604, 6F22, 006P)
Battery Life: 1600+ hours, 6.5 V minimum
Output: 3/4 in spaced banana plugs, 10 MΩ minimum load
resistance
Accessories
80PK-1 (included): Bead Probe 4 ft 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-22: Immersion Probe (8.4 in or 21.3 cm from tip to probe
handle)
80PK-3A: Surface Probe (for flat or curved surfaces)
80PK-24: Air Probe (protected by stainless steel baffle)
80PK-25: Piercing Probe (suitable for food use, liquids and
gels)
80PK-26: Exposed Junction Probe (exposed bead attached to
8.5 in probe)
®
80TK Thermocouple
Module
Instruction Sheet
1.888.475.5235info@Fluke-Direct.com
Fluke-Direct.com
www.valuetronics.com

Summary

Introduction

Introduction to 80 TK

Describes the Fluke 80TK as a thermocouple converter for K-type thermocouples.

Specifications

Electrical Specifications

Details measurement range, resolution, and voltage limits for the 80TK.

Environmental Specifications

Outlines ambient operating and storage temperature and humidity ranges.

Basic Accuracy

Provides accuracy specifications based on range and temperature.

General Specifications

Lists weight, length, battery type, life, and output specifications.

Accessories

Lists included and optional accessories for the 80TK.

Use and Operation

Measuring Technique

Offers suggestions for improving thermocouple measurement accuracy.

Temperature Measurement Procedure

Step-by-step guide to correctly using the 80TK for temperature measurement.

Open Thermocouple Reading

Describes voltage readings when a thermocouple probe is open-circuited.

Battery Condition Test

Procedure to test the battery condition using the multimeter.

Battery Replacement

Instructions for safely opening the unit and replacing the battery.

80 TK Self Test

Procedure to verify the proper operation of the 80TK.

80 TK Calibration Procedure

Location of Calibration Adjustments

Identifies the physical locations of calibration adjustment points on the circuit.

Calibration Procedure 1

Step-by-step guide for calibrating the 80TK for any K-type thermocouple.

Calibration Procedure 2

Procedure for calibrating the 80TK specifically for one K-type thermocouple.

Required Equipment

Lists the necessary equipment for calibrating the 80TK.

80 TK Schematic Diagram

Replaceable Parts

Lists part numbers and descriptions for replaceable components of the 80TK.

Limited Warranty and Liability

Details the product warranty terms and limitations.

Fluke 80TK Specifications

General

Product color	Black, Brass, Red, Yellow
Output interface	Banana plug
Temperature accuracy	2 °C
Temperature measurement range	-50 - 1000 °C
Storage temperature (T-T)	-40 - 60 °C
Operating temperature (T-T)	0 - 50 °C
Operating relative humidity (H-H)	0 - 90 %
Battery life	1600 h
Battery type	9V
Thermocouple type	Type K

Weight and Dimensions

Depth	11.75 mm
Weight	126 g