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[国外标准] The Clinton Itrument Company (CIC)

P:2019-05-16 14:09:50

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The Clinton Instrument Company (CIC)

Company Profile

 

The Clinton Instrument Company was founded in 1952 by Henry H. Clinton.  Henry received his degree in Electrical Engineering from Yale University, and after returning from the Army following World War 2, he began working as a consulting engineer, and CIC was born.  CIC found ready work within the growing wire and cable industry, which had many companies in New England in the 1950s.  Henry worked on many different projects in those early years, but became focused on the design and production of specialized test equipment used for quality control within the industry.

In the early 1960s the US Department of Defense contacted several companies supplying to the wire and cable industry to compete in the development of an Impulse Dielectric Spark Tester.  They wished to specify this equipment in their Military Standards for wire and cable.  But at that time there were no manufacturers of such equipment in the United States.  Each company developed a system, but CIC’s system was chosen because of its unique design and high performance.  

During the time of the development of the Impulse Tester, Henry realized that the Impulse type tester was problematic in several ways: it was inherently sensitive to wire line vibration, difficult to calibrate, and at 200 – 250 Impulses per second, there were limits on how fast wire could be spark tested.  He determined that a better solution would be to increase the frequency of AC sine wave testers which at that time operated at power mains frequencies of 50 Hz. or 60 Hz. depending on location.

At this time, production line speeds in the wire and cable industry were increasing to nearly 4000 feet per minute (1219 mpm).  Underwriter Laboratories (UL), who wrote specifications for commercial wire and cable manufacturing required a dwell time in the spark test electrode equal to 9 full cycles of the AC voltage.  This would mean that in order to spark test a wire, moving 4000 feet per minute, the electrode would have to be 10 feet long (3 meters)!

Henry reasoned that if he could increase the test frequency of the AC spark tester, then the electrode could become shorter and still be compliant with UL standards.  So, after two years of development he introduced and later patented the 3 kHz sine wave spark tester.  Operating at 3000 Hz, this unit could test wire at 3333 feet per minute, (1000 mpm) with an electrode only 2-inches (50 mm) in length.

The early models, the HF-20C and HF-20D gained acceptance within the market gradually.  UL has informally allowed the 3 kHz test for all AC spark tests in 1968, and added the high frequency method to its specifications formally in 1974.  The flagship model HF-20E soon revolutionized the Wire and Cable.

Since this time, CIC has specialized in designing and manufacturing of Wire and Cable Spark Testing and Cable Fault Location equipment, becoming a world leader for this type of equipment.  By the end of the 1980’s CIC had representation throughout the Americas, Asia, Europe, and Africa.  To date, Clinton has sold over 30,000 HF units worldwide.  Our current model is the HF-15B.

Clinton continues to develop and improve the performance of Spark Testing, Cable Fault Location, and High Voltage Leak Detection equipment to meet the requirements of quality minded manufacturers worldwide.  


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