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View Paper |
Session Topic: 9B, Electrical Measurements |
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Paper Title: Pressure Coefficients of Two Kinds of Double Wall-Type 1 Ohm Resistors |
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Date & Time: THURSDAY, August 8, 2002 |
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8:30 - 10:00am PARALLEL SESSIONS - SESSION 9 |
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Speaker: Shigeru Suematsu
Japan Electric Meters Inspection Corporation |
Email: suematsu@pop21.odn.ne.jp |
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Pressure coefficients of five Leeds&Northrup (L&N) made double wall-type 1 ohm resistors (model 4210) and five Yokogawa Electric Works (YEW) made double wall-type 1 ohm resistors (model 2781) were measured by being pressurized and depressurized in a container. Resistances of the L&N made resistors were almost linearly dependent on the pressure in the range of from 810 hPa to 1110 hPa. Their pressure coefficients were measured to be within from +0.0007 ppm/hPa to +0.0022 ppm/hPa. Resistances of the YEW made resistors were almost independent of the pressure. The L&N made resistors are used as standards of resistance in Japan Electric Meters Inspection Corporation. |
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