溫度原級標準
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ITS 90 國際溫度原級標準-氬三相點系統-Fluke 7060/7080
5960A

產品簡介

擁有超越溫度標準的能力

  • 極低的溫度不確定度-0.25mK
  • 溫度恆定能力超過30個小時以上
  • 四個等溫區徑向均勻性小於0.05mK
  • 沒入深度達480mm
  • 氬氣純度99.9999%
  • 多國語言操作-包含中文

 

功能概述

極低的溫度不確定度

A number of technology advancements are designed into the Fluke Calibration 5960A system to achieve a low uncertainty of 0.25 mK. For example, the argon cell is carefully built with an ultra-clean process using 99.9999 % (six nines) purity argon resulting in an uncertainty factor from impurities of 0.015 mK. The deep, 480 mm immersion depth of the entrant well minimizes the effects of stem conduction to less than 0.01 mK and radial uniformity to less than 0.05 mK.

高使用效率

可同時進行四個標定

The 5960A system utilizes liquid nitrogen (LN2) in a Dewar vessel surrounding an argon cell to achieve –189.3442 °C. A digital controller combined with a heater maintains a temperature plateau lasting up to 30 hours with 0.1 mK variation without using complicated pressure controls. By regular renewal of liquid nitrogen in the system, the plateau length can even be extended to four days. The system’s long, stable temperature plateau lets you carry out your SPRT calibrations with better quality and more efficiency. Four entrant wells increase lab productivity by allowing you to calibrate four SPRTs simultaneously.

容易操作與維護

The display panel of the 5690A provides a simple menu structure with soft function keys for setup and programming the argon system. The readout displays simultaneously the set-point temperature, actual control sensor temperature and percent heater power. The display is selectable in eight languages—English, French, Spanish, Italian, German, Russian, Chinese, and Japanese. Applying positive pressure with helium or dry nitrogen to an entrant well port prevents your SPRTs from being bound in the entrant well by freezing moisture. You can insert and remove SPRTs as desired from the system over the duration of a single plateau. Other systems require that you first melt the cell in order to add or remove an SPRT.

 

Specifications
Assigned value -189.3442 °C
Argon gas purity 99.9999 % (6N purity)
Uncertainty (k=2) 0.25 mK
Length of plateau (0.1 mK) >30 hours
Argon cell depth* 160 mm
Number of entrant wells 4
Radial uniformity 0.05 mK
Total immersion depth 480 mm
Entrant well inner diameter (ID) 8.0 mm
Argon gas volume 13.4 moles (535 grams)
Liquid nitrogen Dewar volume 44.2 liters
Display resolution 0.001 °C
Set-point accuracy 0.1 °C (adjustable)
Power requirements 100 V to 115 V (± 10 %) 50/60 Hz, 230 W 230 V (± 10 %) 50/60 Hz, 230 W
System fuse ratings  115 V: 2 A T 250 V
230 V: 1 A T 250 V 
Size (HxWxD)  952 mm x 673 mm x 483 mm (37.5 in x 26.5 in x 19 in) 
Weight  94 kg (207 lbs) 
*Measured from the bottom of the probe well to the surface of argon sample

 

 
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