Fluke 5686 User manual

5686
Glass Capsule Standard Platinum Resistance Thermometer
2004, Rev. 1, 4/11
© 2004 - 2011 Fluke Corporation. All rights reserved. Specications subject to change without notice.
Users Guide
All product names are trademarks of their respective companies.

Limited Warranty & 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, contaminated, or damaged by accident or abnormal conditions of operation or handling. Fluke warrants
that software will operate substantially in accordance with its functional specications 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 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 only 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 to obtain return authorization
information, then send the product to that service center, with a description of the difculty, postage and insurance
prepaid (FOB Destination). 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 failure was caused by neglect,
misuse, contamination, alteration, accident, or abnormal condition of operation or handling, including overvoltage
failures caused by use outside the product’s specied rating, or normal wear and tear of mechanical components, 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).
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, ARISING FROM ANY CAUSE OR 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 or other decision-maker of competent
jurisdiction, such holding will not affect the validity or enforceability of any other provision.
Fluke Corporation Fluke Europe B.V.
P.O. Box 9090 P.O. Box 1186
Everett, WA 98206-9090 5602 BD Eindhoven
U.S.A. The Netherlands
11/99

i
Table of Contents
Title Page
Introduction.........................................................................................................................1
Before You Start..................................................................................................................1
Symbols Used .................................................................................................................1
Safety Information ..........................................................................................................2
Application......................................................................................................................3
Calibration ......................................................................................................................3
Recalibration...................................................................................................................3
Return Procedure ............................................................................................................3
Verifying Probe Accuracy...............................................................................................3
How to Contact Fluke .....................................................................................................4
Specications ......................................................................................................................5
Construction....................................................................................................................5
Installation ..........................................................................................................................5
Environmental Issues......................................................................................................5
Mounting.........................................................................................................................5
Electrical Circuit .............................................................................................................5
Care and Handling Guidelines............................................................................................6
SPRT Care.......................................................................................................................6
Handling Guidelines .......................................................................................................6
Operation ............................................................................................................................6
General............................................................................................................................6
Comparison Calibration of Other Instruments................................................................6
Measuring Current ..........................................................................................................7
Thermal EMF......................................................................................................................7

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Users Guide
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iii
List of Tables
Table Title
Table 1. International Electrical Symbols...............................................................................................2
Table 2. Specications ............................................................................................................................5
Page

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Users Guide
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v
List of Figures
Figure Title Page
Figure 1. 5686 Glass Capsule Standard Platinum Resistance Thermometer..........................................1
Figure 2. The construction of 5686 SPRT...............................................................................................5

5686
Users Guide
vi

1
Introduction
The Fluke Calibration Glass Capsule Standard Platinum Resistance Thermometer (SPRT) is
designed to be the best primary standard interpolating instrument converting temperature to
resistance. The Fluke 5686 Glass Capsule SPRT is a member of the Fluke Calibration SPRT
family (Figure 1). The 5686 SPRT is primarily designed for the following two applications: used
in low temperature range down to 13 K (–260 °C), or used where a totally immersed probe is
prefered to minimize the heat ow from or to the sensor. Long stem SPRTs are not suitable for
some applications where the probe should be encased into a vessel completely. The 5686 SPRT
covers the range from 13 K (–260 °C) to 505 K (232 °C).
The 5686 is carefully annealed at the appropriate temperatures and precisely tested for stability.
The sensing elements are fabricated using high-purity platinum wire wound in a strain-free design
on a fused silica cross frame. The special glass capsule of the 5686 is pressure sealed with 5N
pure helium.
5686.tif
Figure 1. 5686 Glass Capsule Standard Platinum Resistance Thermometer
Before You Start
Symbols Used
Table 1 lists the International Electrical Symbols. Some or all of these symbols may be used on
the instrument or in this manual.

5686
Users Guide
2
Table 1. International Electrical Symbols
Symbol Description Symbol Description
XElectric Shock OOff
:Hot Surface (Burn Hazard) IOn
WRead the User’s Manual
(Important Information) IFuse
BAC (Alternating Current) MBattery
DAC-DC ;C-TIC Australian EMC Mark
FDC )Canadian Standards Association
TDouble Insulated PCE Complies with European Union
Directives
.PE Ground CAT II
CAT II equipment is designed to
protect against transients from energy-
consuming equipment supplied from
the xed installation, such as TVs, PCs,
portible tools, and other household
appliances.
Safety Information
Use this instrument only as specied in this manual. Otherwise, the protection provided by the
instrument may be impaired.
The following denitions apply to the terms “Warning” and “Caution”.
• “Warning” identies conditions and actions that may pose hazards to the user.
• “Caution” identies conditions and actions that may damage the instrument being used.
WarningW
To avoid personal injury, follow these guidelines.
• DO NOT use this instrument to measure the temperature of any hazardous
live component.
• DO NOT use this instrument for any application other than calibration work.
• DO NOT use this instrument in environments other than those listed in the
user’s guide.
• Use of this instrument at high temperatures for extended periods of time can
cause the handle to become hot.
• Follow all safety guidelines listed in the Users Guide.
• Calibration equipment should only be used by trained personnel.