Fluke 80TK User's Manual
Contents
1. 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 0 1 C F in 300 mV range 1 0 C F in 3V range 4000 count display 0 1 C F in 400mvV 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 restor2. 0 1W 100PPM 0805 RESISTOR SMR RES CERM 1 2M 5 125W 200PPM 1206 RESISTOR CERMET 4 12M 1 0 1W 400PPM 0805 RESISTOR SMR RES MF 750K 0 25 0 1W 50PPM 0805 RESISTOR SMR RES VAR CERM 100 20 0 25W RESISTOR SMR RES VAR CERM 1K 20 0 25W RESISTOR SMR RES CERM 182K 1 125W 100PPM 1206 RESISTOR SMR RES CERM 604K 1 125W 100PPM 1206 RESISTOR SMR RES MF 10K 0 1 0 1W 50PPM 0805 RESISTOR SMR RES MF 442K 0 1 0 1W 25PPM 0805 SWITCH SWITCH SLIDE DPTT BIPOLAR 4040 SMR IC V REF SHUNT 2 5 V 1 150 PPM SOT23 LIMITED WARRANTY amp LIMITATION OF LIABILITY 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 Fluke authorized resellers shall extend thi
3. 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 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 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 3 Connect the thermocouple to the 80TK thermocouple input and place the thermocouple into the room temperature bath along with the mercury reference thermometer Required Equipment Refer to Table 1 for equipment required to calibrate the 80TK Table 1 Required Equipment Instrument Mercury Reference Thermometer 0 1 C resolution Dewar Flask and Cap water bath Digital Voltmeter lt 1 ohm Shorting bar OR K type thermocouple Minimum Specification 2 pint capacity filled with water 300 mV r
4. 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 1985 2002 Fluke Corporation All rights reserved Printed in USA All product names are trademarks of their respective companies 80PK 7 Industrial Surface Probe 80PK 8 Pipe Clamp Probe For pipe diameter 1 4 to 1 7 8 80CK M Male Mini Connector for attachment of K type thermocouple wire Use and Operation Thermocouples rely upon the difference in temperature between the measuring junction and a reference junction Traditionally the reference junction is another thermocouple placed in an ice bath however the 80TK uses an electronic ref
5. 21447 943659 928866 928767 928754 806240 802709 802659 106937 802782 927426 876441 802444 802667 740225 930065 D Pera CASE TOP CASE BOTTOM COVER SWITCH SHIELD BOTTOM SHIELD TOP SHIELD CONTACT SCREW SCREW PH PO STL 4 40 250 IC OP AMP TLC271A PROGRAMMABLE LOW POWER SO8 BATTERY PRIMARY BATTERY 9V 0 15MA CAPACITOR SMR CAP CER 0 1UF 10 25V X7R 0805 CAPACITOR SMR CAP TA 1UF 20 20V 3216 CAPACITOR SMR CAP TA 10UF 20 10V 3216 DIODE BAS16 SMR DIODE SI 75V 250MA SOT 23 DIODE BAT54 SMR DIODE SI SCHOTTKY 30V 200MA SOT 23 80TK 8008 CONTACT THERMOCOUPLE 80TK 3012 80TK PCB SM_PIH 80TK 8009 PLUG BANANA NPN MMBT3904 SMR TRANSISTOR SI NPN 60V 350MW SOT 23 NPN MMBT5089 SMR TRANSISTOR SI NPN 30V 200MW SOT 23 PNP MMBT5087 SMR TRANSISTOR SI PNP 50V 225MW SOT 23 RESISTOR CERMET 22M 1 0 1W 400PPM 0805 TAPE RESISTOR CERMET 2 1K 1 0 1W 100PPM 0805 TAPE RESISTOR SMR RES CERM 22 1K 1 100PPM 1206 RESISTOR SMR RES MF 18 2K 0 1 0 1W 25PPM 0805 RESISTOR SMR RES MF 22 1K 0 1 0 1W 25PPM 0805 RESISTOR SMR RES CERM 698K 1 125W 100PPM 1206 RESISTOR CERMET 1 82M 1 0 1W 400PPM 0805 RESISTOR SMR RES VAR CERM 200K 25 RESISTOR SMR RES CERM 4 22K 1 125W 100PPM 1206 RESISTOR CERMET 10M 1 0 1W 400PPM 0805 TAPE RESISTOR SMR RES CERM 100K 1 0 1W 100PPM 0805 RESISTOR SMR RES CERM 4 99K 1 0 1W 100PPM 0805 RESISTOR SMR RES CERM 2 43K 1
6. ange 100 uV resolution meets NBS standards with subminiature K plug Recommended Model Princo Model SAMA CP45 Thermos bottle Fluke Model 87 Series III Wire 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 Canada 1 800 36 FLUKE 1 800 363 5853 Singapore 65 738 5655 Europe 31 402 675 200 Anywhere in the world 1 425 446 5500 Or visit Fluke s Web site at www fluke com Fluke Corporation Fluke Europe B V P O Box 9090 P O Box 1186 Everett WA 98206 9090 5602 B D Eindhoven USA The Netherlands Q5 R22 MMBTS087 3 03 AWN a6 MMBT5087 Q1 MMBT3904 V RS poe mC 1K 604K c2 Q3 o 1 MMBT5089 0 1U RB R20 100K CR1 owP1 BAS16 SHIELD AN AN BTI y Lopi BANANA JACKS m erP2 80TK 4012 80TK Schematic Diagram Replaceable Parts 735845 C4 CR1 CR4 CR2 J1 J2 MP1 P1 P2 Q1 Q2 Q4 Q3 Q5 Q6 R1 R10 R11 R12 R13 R14 R18 R15 R16 R17 R19 R2 R20 R21 R22 R23 R24 R3 R4 R5 R6 R7 R8 R9 S1 VR1 735852 696534 942529 942552 650223 830489 876529 735993 1276793 736033 742676 820902 820910 802725 943006 913731 802675 802683 867296 802717 928085 8
7. ed 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 3200 count display Environmental Ambient Operating Range 0 to 50 C Storage Temperature 40 to 60 C 40 to 140 F 0 to 90 0 to 35 C 0 to 70 35 to 50 C Humidity PN 735985 February 1985 Rev 6 11 02 FLUKE 80TK Thermocouple Module Instruction Sheet 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 Ct 1 75 2 C 664 to 932 F t 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 to 18 C and 28 C to 50 C ambient multiply the basic arpa specification by 0 1 for each degree above 28 or elow 18 t For accuracy enhancement between 351 C to 500 C subtract 3 degrees from the reading The accuracy is now 0 75 2 C t 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
8. erence junction The converter 80TK must be operated in a thermal environment consistent with its specifications Measuring Technique Making accurate temperature readings using a thermocouple is a matter of identifying and minimizing the causes of error The largest contributor to errors is the thermal interface between the measurement surface and the thermocouple The next largest contributor is the temperature difference between the thermocouple probe and its environment Here are some suggestions for improving the accuracy of your temperature measurements Ensure that there is a good connection between the probe and the surface you are measuring You can do this in many ways 1 Increase the mounting pressure 2 Use an interface agent such as silicone grease between the thermocouple probe and the surface you are measuring 3 Use a thermal epoxy to attach the thermocouple When measuring temperatures higher than ambient adjust the connection of the probe to the surface until you get the highest temperature reading Use any of the suggestions given above to do so When measuring temperatures lower than ambient adjust the connection of the probe to the surface until you get the lowest temperature reading Use any of the suggestions given above to do so When measuring temperatures near ambient make the reading when the multimeter display is most stable Warning To avoid electrical shock do not use this instrument w
9. hen voltages exceeding 24V ac or 60V dc are present The probe tip is electrically connected to the output terminals Temperature Measurement Follow this procedure to correctly use the 80TK 1 Plug the 80TK into the multimeter Ensure that the banana plug with the red dot above it plugs into the voltage input and the other plug is in the COM input 2 Set the multimeter to the 200 300 or 400 millivolt range This setting will read temperatures equal to the number of millivolts the range has i e 320 C or F if the millivolt range reads 320 mV 3 Use the dc volt setting and ignore the decimal for higher temperatures than can be accomodated by the millivolt range Less resolution is available when using the volt range 4 Plug the thermocouple into the 80TK thermocouple input connector If the thermocouple does not have a plug attached connect the thermocouple wires to the thermocouple input screws inside the 80TK The yellow coded wire chromel connects to the screw marked 5 Turnon the 80TK and the multimeter 6 Adjust the thermal connection between the measurement surface and the thermocouple as described previously 7 Read the temperature on the multimeter Open Thermocouple Reading If the thermocouple probe has open circuited i e is broken the mulimeter will read a steady constant voltage The voltage readings are Range Reading c 21 0V F 222V Battery Condition Test 1 Set the po
10. imeter should read the ambient room temperature N 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 Location of Calibration Adjustments 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 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 3 Use the shorting bar to short the 80TK thermocouple input terminals 4 Plug the 80TK into the dc volts input of the multimeter Set the multimeter to the 300 mV or equivalent range 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
11. n charges FOB Shipping Point 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
12. s 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 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 transportatio
13. wer switch to the OFF position 2 Connect the 80TK to the multimeter 3 Set the multimeter to the 200 300 or 400 mV dc range 4 Read the battery test voltage on the multimeter A minimum reading of 75 mV is acceptable and indicates that approximately 100 hours of battery life remain Battery Replacement Warning To avoid electrical shock remove the thermocouple from the measurement surface or disconnect the thermocouple from the instrument before opening the case Totally reassemble the instrument before attempting to use it 1 Set the power switch to the OFF position 2 Disconnect the 80TK from the multimeter 3 Unplug or disconnect the thermocouple 4 Turn the 80TK so the power switch is facing down Remove the single screw located between the banana plugs 5 Grasp one case half in each hand Pull the two halves apart beginning at the end with the banana plugs 6 Remove and replace the battery Reassemble the 80TK 8 To reassemble mate the two case halves at the end with the thermocouple connector then hinge the two halves together 80TK Self Test The following test is an easy way to verify proper operation of the 80TK 1 Follow the Battery Replacement Procedure to open the case 2 Using a short piece of bare wire short the input thermocouple terminals together 3 Plug the 80TK into the multimeter 4 Turn the multimeter and the 80TK on Set the multimeter to 200 300 or 400 mV range 5 The mult
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