5698-25 Working Standard SPRT

ขอใบเสนอราคา

 

 

Description

5698-25 Working Standard SPRT

The 5698 Working Standard SPRT is a true SPRT. It meets the ITS-90 ratio requirements for SPRTs and includes a Hart-designed, completely strain-free platinum sensor. With a 485-mm quartz sheath, this 25-ohm SPRT covers a temperature range from –200 °C to 670 °C. Long-term drift, which we define as the change in output resistance at the triple point of water after 100 hours at 670 °C, is (after converting to temperature) less than 6 mK—typically less than 3 mK.

The 5698 is the perfect companion to a Fluke 1595A Super-Thermometer, which reads 25-ohm SPRTs to within 0.015 mK at 0 °C and includes a number of convenient features for working with SPRTs. Requiring 1 mA of excitation current, the 5698 can also be used easily with a Fluke Black Stack, or even a Chub-E4 Thermometer.

If you need your SPRT calibrated by a reputable calibration lab, we offer appropriate calibration options by fixed-point in our NVLAP-accredited lab. Our calibration prices are as reasonable as our instrument prices, so you get maximum value from your SPRT.

Why buy critical temperature standards from companies unwilling to publish complete specifications? At Fluke Calibration, we not only provide excellent post-purchase support so you have the best possible ownership experience, we also provide you all the information we can before you purchase—including detailed performance specifications.

Maybe there is some art mixed with our science. But that doesn’t mean we keep secrets. Trust your lab standards to Fluke Calibration.

Highlights

All the features you expect in a world-class SPRT

  • Conforms to ITS-90 SPRT guidelines
  • Drift rate typically 0.003 °C
  • Calibration options by fixed point
  • Unmatched performance-to-price-ratio

SPRTs. Art or science? It takes, in fact, quite a bit of both. The one thing not involved is mystery. That’s why Fluke Calibration SPRTs always include detailed published specifications, including drift rates.

Our newest SPRT is no exception. It was designed by the same Hart metrologists who have created a dozen different SPRT designs used in national labs around the world. And it performs just like we say it does.

Specifications

Specifications
Temperature Range –200 °C to 670 °C
Nominal RTPW 25.5 Ω (± 0.5 Ω)
Current 1.0 mA
Resistance Ratios W(234.315 K) ≤ 0.844235
W(302.9146 K) ≥ 1.11807
Sensitivity 0.1 Ω/°C
Drift Rate < 0.006 °C/100 hours at max temperature (typically < 0.003 °C)
Self-heating at TPW < 0.002 °C under 1 mA current
Reproducibility ± 0.0015 °C or better
RTPW Drift After Thermal Cycling < 0.001 °C
Diameter of Pt Sensor Wire 0.07 mm (0.003 in)
Protective Sheath Quartz Glass
Diameter : 7 mm (0.28 in)
Length : 485 mm (19.1 in)
Lead Wires Four sensor wires

Models and Accessories

Model Name Description
5698-25 25 Ω Working Standard SPRT with maple carrying case
(No calibration included. See recommended calibration options below. Contact your Fluke Calibration representative for additional calibration options.)

Accessories common to all models :

Accessory Description
1912-4-7 PRT Calibration, –200 °C to 660 °C, NVLAP Accredited

Knowledge and Information

Product Manuals
application/pdf icon 5698 Statement of Memory Volatility (117.74 KB)
application/pdf icon 5698 Users Guide (Eng) (1.87 MB)
Application Notes
application/pdf icon Establishment of a Primary Temperature Standards Laboratory (3.21 MB)
application/pdf icon Thermocouple App Notes Series, 1 of 4 – Thermocouple Fundamentals (2.5 MB)
application/pdf icon Thermocouple App Notes Series, 1 of 4 – Grundlagen zu Thermoelementen (2.22 MB)
application/pdf icon Thermocouple App Notes Series, 1 of 4 – L’essentiel des thermocouples (2.22 MB)
application/pdf icon Thermocouple App Notes Series, 2 of 4 – How to Select Thermocouple Calibration Equipment (2.51 MB)
application/pdf icon Thermocouple App Notes Series, 2 of 4 – Auswahl von Geräten zur Kalibrierung von Thermoelementen (2.21 MB)
application/pdf icon Thermocouple App Notes Series, 2 of 4 – Guide de sélection d’équipement d’étalonnage de thermocouple (2.21 MB)
Papers / Articles
application/pdf icon Demonstrating Competency and Equivalency of Two Commercial SPRT Calibration Facilities (365.33 KB)
application/pdf icon Improving the Stability of Standard Platinum Resistance Thermometers (207.37 KB)