Guildline 9230A-30 Overview

Guildline 9230A series of precision DC current shunts are true 4-terminal devices intended for the precise measurement of DC current. They are constructed from specially selected elements supported on an insulating base for mechanical stability and covered with a perforated metal cover to allow proper cooling while providing physical protection for the elements.

In the design of the 9230A special consideration has been given to the effects of power dissipation which introduce self heating errors, beyond the required specification even when at full power and operating in air. The type of material selected for the elements has a very low temperature coefficient and the size and number of elements chosen give the optimum surface area to dissipate the maximum specified power in air for a particular value. The performance of the 9230A shunts can be dramatically improved by operating them immersed in oil such as in Guildline 9730CR or 5010 constant temperature oil baths.

Features:

• Low self-heating
• Low temperature coefficient
• Controlled current distribution through the element
• Low thermal EMFs
• Wide dynamic range
• < 10 ppm long term stability
• Air or oil cooled
• Special Values available on request
• Forced convection accessory available for improved power dissipation capability

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