®
80TK Thermocouple
Module
Instruction Sheet
Introduction
Basic Accuracy: (@ 23 ±5°C Calibration)*
(Applies for one year after purchase or recalibration)
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).
RANGE
ACCURACY ± (% of reading +
degrees), 1 year
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.
-20 to 350°C
-4 to 662°F
351 to 500°C†
664 to 932°F†*
501 to 1000°C
933 to 1832°F
-50 to -21°C
-58 to -5.8°F
0.5% ± 2°C
0.5% ± 3.6°F
1.75% ± 2°C
1.75% ± 3.6°F
2.0% ± 2°C
2.0% ± 3.6°F
2.5% ± 2°C typical
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.
Specifications
Electrical
† 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.
Measurement Range: -50 to 1000 degrees Celsius
-58 to 1832 degrees Fahrenheit
Resolution:
2000 count display:
3200 count display:
4000 count display:
0.1° C/F in 200 mV range
1.0° C/F in 2V range
0.1 C/F in 300 mV range
1.0 C/F in 3V range
0.1° C/F in 400mV range
1.0° C/F in 4V range
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
Note: Ignore decimal point on 2V, 3V, or 4V range.
Weight: 4.5 ounces, 126 grams
Maximum Voltage at Thermocouple Input: 60V DC, 24V AC
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
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.
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.
Environmental
80PK-2A: Immersion Probe (8" or 20.32 cm from tip to probe
Ambient Operating Range: 0 to 50°C
Storage Temperature: -40 to 60°C
handle)
80PK-3A: Surface Probe (for flat or curved surfaces)
80PK-4A: Air Probe (protected by stainless steel baffle)
-40 to 140°F
0% to 90% (0 to 35°C)
0% to 70% (35 to 50°C)
Humidity:
80PK-5A: Piercing Probe (suitable for food use, liquids and
gels)
80PK-6A: Exposed Junction Probe (exposed bead attached to
6" sheath)
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.
4. Plug the 80TK into the dc volts input of the multimeter. Set
the multimeter to the 300 mV or equivalent range.
80TK Calibration Procedure
A calibration cycle of 1 year is recommended to maintain the
80TK within specifications. The required equipment is listed
below. Use Calibration Procedure 1 to calibrate the 80TK for
use with any K-type thermocouple. Use Calibration Procedure
2 if the 80TK will be used exclusively with one K-type
thermocouple. Always calibrate the Celsius function before
calibrating the Fahrenheit function.
5. Set the switch on the 80TK to CELSIUS position. Adjust
R4 to half rotation, then adjust R5 until the reading on the
multimeter matches the reading on the mercury reference
thermometer ± 5.0°C. Now adjust R4 until the two
readings are within ± 0.1°C.
Note
If the mercury reference thermometer displays °F,
use the following conversion to get °C:
[5/9 (temp in °F)-32] = (temp in °C)
6. Set the switch on the 80TK to the FAHRENHEIT (center)
position.
7. Adjust R16 until the reading on the multimeter matches
the reading on the mercury reference thermometer ±
0.2°F.
Note
If the mercury reference thermometer displays °C,
use the following conversion to get °F:[9/5(temp
in °C) + 32] = (temp in °F)
8. Set 80TK switch to the OFF position. Remove 80TK from
multimeter and remove any connections to the 80TK
thermocouple input terminals.
9. Reassemble the 80TK.
10. The 80TK is now calibrated.
Location of Calibration Adjustments
Calibration Procedure 2.
Use this procedure if the 80TK will be used exclusively with
one K-type thermocouple:
Perform Calibration Procedure 1. Substitute the following for
step 3 in Calibration Procedure 1:
Calibration Procedure 1.
Use this procedure to calibrate the 80TK:
1. Verify the condition of the battery as described above and
replace the battery if necessary. Follow the Battery
Replacement procedure to disassemble the 80TK, but do
not remove the battery or reassemble the 80TK.
3. Connect the thermocouple to the 80TK thermocouple
input, and place the thermocouple into the room
temperature bath along with the mercury reference
thermometer.
2. Allow 80TK and the room-temperature water bath to
stabilize at room temperature, away from drafts, for at
least 30 minutes before proceeding with calibration. Place
the reference thermometer into the room temperature
water bath. Allow the reading to stabilize.
Required Equipment
Refer to Table 1 for equipment required to calibrate the 80TK.
3. Use the shorting bar to short the 80TK thermocouple input
terminals.
Table 1. Required Equipment
Minimum Specification
Instrument
Recommended Model
Princo Model SAMA-CP45
Mercury Reference Thermometer
Dewar Flask and Cap(water bath)
Digital Voltmeter
0.1°C resolution
2 pint capacity, filled with water
300 mV range, 100 µV resolution
<1 ohm
Thermos bottle
Fluke Model 87 Series III
Wire
Shorting bar
OR
K-type thermocouple
meets NBS standards(with subminiature K plug)
Fluke 80PK-1
To contact Fluke, call one of the following telephone numbers:
USA: 1-888-99-FLUKE (1-888-993-5853)
Japan: +81-3-3434-0181
Singapore: +65-738-5655
Anywhere in the world: +1-425-446-5500
Canada: 1-800-36-FLUKE (1-800-363-5853)
Europe: +31 402-675-200
Fluke Corporation
P.O. Box 9090
Everett WA 98206-9090
USA
Fluke Europe B.V.
P.O. Box 1186
5602 B.D. Eindhoven
The Netherlands
80TK-4012
80TK Schematic Diagram
Replaceable Parts
Description
LIMITED WARRANTY & LIMITATION OF LIABILITY
Ref Des
PN
Each Fluke product is warranted to be free from defects in material and workmanship
under normal use and service. The warranty period is one year and begins on the date
of shipment. Parts, product repairs and services are warranted for 90 days. This
warranty extends only to the original buyer or end-user customer of a Fluke authorized
reseller, and does not apply to fuses, disposable batteries or to any product which, in
Fluke’s opinion, has been misused, altered, neglected or damaged by accident or
abnormal conditions of operation or handling. Fluke warrants that software will operate
substantially in accordance with its functional specifications for 90 days and that it has
been properly recorded on non-defective media. Fluke does not warrant that software
will be error free or operate without interruption.
735845 CASE TOP
735852 CASE BOTTOM
735860 COVER SWITCH
735944 SHIELD, BOTTOM
735910 SHIELD, TOP
735928 SHIELD CONTACT
747501 SCREW,SCREW,PH,PO,STL,4-40,.250
AR1
BT1
C1 C2
C3
802691 IC,OP AMP,TLC271A,PROGRAMMABLE,LOW POWER,SO8
696534 BATTERY,PRIMARY ,BATTERY,9V,0-15MA
Fluke authorized resellers shall extend this warranty on new and unused products to
end-user customers only but have no authority to extend a greater or different warranty
on behalf of Fluke. Warranty support is available if product is purchased through a
Fluke authorized sales outlet or Buyer has paid the applicable international price. Fluke
reserves the right to invoice Buyer for importation costs of repair/replacement parts
when product purchased in one country is submitted for repair in another country.
Fluke’s warranty obligation is limited, at Fluke’s option, to refund of the purchase price,
free of charge repair, or replacement of a defective product which is returned to a Fluke
authorized service center within the warranty period.
942529 CAPACITOR,SMR,CAP,CER,0.1UF,+-10%,25V,X7R,0805
942552 CAPACITOR,SMR,CAP,TA,1UF,+-20%,20V,3216
650223 CAPACITOR,SMR,CAP,TA,10UF,+-20%,10V,3216
830489 DIODE,BAS16,SMR,DIODE,SI,75V,250MA,SOT-23
876529 DIODE,BAT54,SMR,DIODE,SI,SCHOTTKY,30V,200MA,SOT-23
735993 80TK-8008,CONTACT, THERMOCOUPLE
C4
CR1 CR4
CR2
J1 J2
MP1
P1 P2
Q1 Q2 Q4
Q3
1276793 80TK-3012,80TK - PCB SM_PIH
736033 80TK-8009,PLUG,BANANA
To obtain warranty service, contact your nearest Fluke authorized service center or
send the product, with a description of the difficulty, postage and insurance prepaid
(FOB Destination), to the nearest Fluke authorized service center. Fluke assumes no
risk for damage in transit. Following warranty repair, the product will be returned to
Buyer, transportation prepaid (FOB Destination). If Fluke determines that the failure
was caused by misuse, alteration, accident or abnormal condition of operation or
handling, Fluke will provide an estimate of repair costs and obtain authorization before
commencing the work. Following repair, the product will be returned to the Buyer
transportation prepaid and the Buyer will be billed for the repair and return
transportation charges (FOB Shipping Point).
742676 NPN,MMBT3904,SMR,TRANSISTOR,SI,NPN,60V,350MW,SOT-23
820902 NPN,MMBT5089,SMR,TRANSISTOR,SI,NPN,30V,200MW,SOT-23
820910 PNP,MMBT5087,SMR,TRANSISTOR,SI,PNP,50V,225MW,SOT-23
802725 RESISTOR,CERMET,22M,+-1%,0.1W,400PPM,0805,TAPE
943006 RESISTOR,CERMET,2.1K,+-1%,0.1W,100PPM,0805,TAPE
913731 RESISTOR,SMR,RES,CERM,22.1K,+-1%,100PPM,1206
802675 RESISTOR,SMR,RES,MF,18.2K,+-0.1%,0.1W,25PPM,0805
802683 RESISTOR,SMR,RES,MF,22.1K,+-0.1%,0.1W,25PPM,0805
867296 RESISTOR,SMR,RES,CERM,698K,+-1%,.125W,100PPM,1206
802717 RESISTOR,CERMET,1.82M,+-1%,0.1W,400PPM,0805
928085 RESISTOR,SMR,RES,VAR,CERM,200K,+-25%
821447 RESISTOR,SMR,RES,CERM,4.22K,+-1%,.125W,100PPM,1206
943659 RESISTOR,CERMET,10M,+-1%,0.1W,400PPM,0805,TAPE
928866 RESISTOR,SMR,RES,CERM,100K,+-1%,0.1W,100PPM,0805
928767 RESISTOR,SMR,RES,CERM,4.99K,+-1%,0.1W,100PPM,0805
928754 RESISTOR,SMR,RES,CERM,2.43K,+-1%,0.1W,100PPM,0805
806240 RESISTOR,SMR,RES,CERM,1.2M,+-5%,.125W,200PPM,1206
802709 RESISTOR,CERMET,4.12M,+-1%,0.1W,400PPM,0805
802659 RESISTOR,SMR,RES,MF,750K,+-0.25%,0.1W,50PPM,0805
106937 RESISTOR,SMR,RES,VAR,CERM,100,+-20%,0.25W
802782 RESISTOR,SMR,RES,VAR,CERM,1K,+-20%,0.25W
927426 RESISTOR,SMR,RES,CERM,182K,+-1%,.125W,100PPM,1206
876441 RESISTOR,SMR,RES,CERM,604K,+-1%,.125W,100PPM,1206
802444 RESISTOR,SMR,RES,MF,10K,+-0.1%,0.1W,50PPM,0805
802667 RESISTOR,SMR,RES,MF,442K,+-0.1%,0.1W,25PPM,0805
740225 SWITCH,SWITCH,SLIDE,DPTT
Q5 Q6
R1
R10
R11
R12
R13
R14 R18
R15
R16
R17
R19
R2 R20
R21
R22
R23
R24
R3
THIS WARRANTY IS BUYER’S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU
OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT
LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR
A PARTICULAR PURPOSE. FLUKE SHALL NOT BE LIABLE FOR ANY SPECIAL,
INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES,
INCLUDING LOSS OF DATA, WHETHER ARISING FROM BREACH OF WARRANTY
OR BASED ON CONTRACT, TORT, RELIANCE OR ANY OTHER THEORY.
Since some countries or states do not allow limitation of the term of an implied warranty,
or exclusion or limitation of incidental or consequential damages, the limitations and
exclusions of this warranty may not apply to every buyer. If any provision of this
Warranty is held invalid or unenforceable by a court of competent jurisdiction, such
holding will not affect the validity or enforceability of any other provision.
R4
R5
R6
R7
R8
R9
S1
VR1
930065 BIPOLAR 4040,SMR,IC,V REF,SHUNT,2.5 V,1%,150 PPM,SOT23
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