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Table of Contents
- 1 International Symbols
- 2 Precautions and Safety Information
- 3 Specifications
- 4 Basic Maintenance
- 5 Changing the Battery
- 6 Required Test Equipment
- 7 Performance Tests
- 8 Display Test
- 9 Wide Range Performance Test Procedure
- 10 Ice Bath Construction
- 11 Thermometer Calibration
- 12 Replaceable Parts
- Download this manual
These service instructions are for use by qualified personnel only. To avoid
electric shock, do not perform any servicing unless you are qualified to do so.
Introduction
This document contains specifications, general maintenance information, performance tests, calibration
procedures, and a list of user replaceable parts for the Fluke 50S and 50D Thermometers, hereafter referred
to as "the thermometer".
Service
To contact Fluke, order parts, or locate a Fluke service center, call one of the following telephone numbers:
USA: 1-888-99-FLUKE (1-888-993-5853)
Canada: 1-800-36-FLUKE (1-800-363-5853)
Europe: +31 402-675-200
Japan: +81-3-3434-0181
Singapore: +65-738-5655
Anywhere in the world: +1-425-446-5500
Or, visit Fluke's Web site at www.fluke.com.
Warranty
This Fluke product will be free from defects in material and workmanship for one year from the date of
purchase. This warranty does not cover fuses, disposable batteries or damage from accident, neglect, misuse
or abnormal conditions of operation or handling. Resellers are not authorized to extend any other warranty
on Fluke's behalf. To obtain service during the warranty period, send your defective tester to the nearest
Fluke Authorized Service Center with a description of the problem.
THIS WARRANTY IS YOUR ONLY REMEDY. NO OTHER WARRANTIES, SUCH AS FITNESS FOR
A PARTICULAR PURPOSE, ARE EXPRESSED OR IMPLIED. FLUKE IS NOT LIABLE FOR ANY
SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES, ARISING
FROM ANY CAUSE OR THEORY. Since some states or countries do not allow the exclusion or limitation
of an implied warranty or of incidental or consequential damages, this limitation of liability may not apply to
you.
PN 1281009
October 1999 Rev.1, 3/03
©1999-2003 Fluke Corporation. All rights reserved. Printed in U.S.A.
All product names are trademarks of their respective companies.
WWarning
Fluke Corporation
P.O. Box 9090
Everett WA
98206-9090
Fluke Europe B.V.
P.O. Box 1186
5602 B.D.
Eindhoven
The Netherlands
50S & 50D
Thermometer
Calibration Information
1
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Table of Contents
Related Manuals for Fluke 50D
Summary of Contents for Fluke 50D
- Page 1 Or, visit Fluke's Web site at www.fluke.com. Warranty This Fluke product will be free from defects in material and workmanship for one year from the date of purchase. This warranty does not cover fuses, disposable batteries or damage from accident, neglect, misuse or abnormal conditions of operation or handling.
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Page 2: International Symbols
50S & 50D Thermometer Calibration Information International Symbols Table 1 identifies the international electrical symbols used in this document. Table 1. International Electrical Symbols Used in this Document Low Battery Important information Complies with relevant Canadian Complies with European Union directives Standards Association directives Underwriters Laboratories, Inc. -
Page 3: Specifications
Specifications Specifications General Weight 280 g (10 oz) Dimensions 2.8 cm 7.5 cm 16.6 cm (without holster) (1.1 in 3 in 6.6 in) Battery Standard 9 V battery (NEDA 1604, 6F22, or 006P) Protection Class III as defined in IEC 348, Safety Requirements for Electronic Apparatus Environmental Operating Temperature C to +50... - Page 4 50S & 50D Thermometer Calibration Information Clean the thermometer case with a mild detergent and water. The pca may be washed with isopropyl alcohol or deionozed water and a soft brush. Dry the pca with clean dry air at low pressure, then bake it at 50 C for 24 hours.
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Page 5: Changing The Battery
Basic Maintenance Changing the Battery WWarning Replace the battery as soon as the low battery indicator (N) appears. The possibility of false readings increases when the battery is not fully charged. False readings can lead to personal injury. To avoid electrical shock, disconnect the thermocouple(s) before opening the case. -
Page 6: Required Test Equipment
50S and 50D thermometers. If the required equipment is not available, instruments with equivalent specifications may be used. Table 2. Required Test Equipment Test Equipment Required Characteristics Recommended Model Fluke 87 Series IV Digital DC Voltage Accuracy: 0.5% Multimeter Temperature Probe Accuracy: Certified to C ambient... -
Page 7: Wide Range Performance Test Procedure
Wide Range Performance Test Procedure This test verifies the instrument specifications. If the instrument fails this test, perform the calibration procedure. If the unit continutes to fail, it should be taken to a Fluke service center. Ice Bath Construction To begin the wide range performance test procedure, first construct an ice bath using the following steps: 1. - Page 8 50S & 50D Thermometer Calibration Information 50S or 50D Thermocouple wire Thermometer Ice bath 5520A Copper wire zf05f.eps Figure 4. Ice Bath Equipment Connections Ice Bath Test Use the following procedure to test the thermometer. This test should be conducted on both thermocouple inputs of the 50D.
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Page 9: Thermometer Calibration
25.2 C 0.1 If you are calibrating a Fluke 50S, skip the next two steps. 7. Leave the 5520A adjusted for 0.00000 V. Connect the 5520A output to the T2 input and select the T2 function. - Page 10 Reference Junction Sensor calibration mode. Shorting out the VIEW switch grid turns off a filter so that the reading stabilizes immediately. 13. Using the 80T-150U and the Fluke 87 Series IV Digital Multimeter (DMM), measure the reference junction transistor temperature by placing the 80T-150U probe tip against Q1, located in the middle hole of the isothermal block.
- Page 11 Mercury Thermometer reading. Allow the thermometer reading to stabilize and repeat the adjustment as necessary until a stable and correct reading can be attained. 6. Repeat steps 4 and 5 for R13 (T2 offset, Fluke 50D only). Thermocouple Input Calibration (Optional) Note This adjustment procedure counteracts the adjustments made in the “Optimizing Performance...
- Page 12 50S & 50D Thermometer Calibration Information 5. Allow the system to stabilize, then adjust T1 or T2 offset adjustments for a temperature display equal to the reading of the lag bath reference thermometer. 6. Calibration of the thermometers is complete. Disconnect all test equipment from the instrument. 50S or 50D Thermometer Thermocouple wire...
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Page 13: Replaceable Parts
640565 FOOT, NON-SKID 844340 LABEL, WINDOW 791343 WINDOW, LCD (BLANK) 742205 LCD FLUKE-51, LCD, 5 DIGIT, TEMPERATURE, MULTIPLEXED 741314 LCD FLUKE-52, LCD, 5 DIGIT, TEMPERATURE, MULTIPLEXED Not shown 773135 THERMO COUPLE ASSY, T/C ASSY, K-TYPE, BEADED, MOLDED-PLUG Not shown 1278540 MULTI-LANGUAGE, FLUKE 50S &... - Page 14 50S & 50D Thermometer Calibration Information zf08f.eps Figure 8. Exploded View Diagram (Model 50D is Shown)