FSR (Secondary Standard Foil Resistor)
Vishay Foil Resistors
Bulk Metal® Foil Resistor Standard with TCR of 0.3 ppm/°C,
High Stability and Accuracy for Laboratory Calibration Standards
Direct Plug-In Device for Most DMM’S Available in the Market
FEATURES
• Temperature coefficient of resistance (TCR):
To ±0.3 ppm/°C (+15°C to +45°C) (see Table 1)
• Max TCR: 10 to 30 ppm window (see Figure 3)
• Resistance range: 1Ω to 150 kΩ (for higher and lower
values, please contact Applications Engineering)
• Available up to six significant digits (e.g., 9K99962)
• Resistance tolerance available for ordering: to
±0.005% (50 ppm)
• High accuracy: to 10 ppm (see Table 1)
INTRODUCTION
• Stability: ±0.0005% (5 ppm) at 25°C, 12 months
A manufacturer of the most precise production-size
resistors available, Vishay Foil Resistors (VFR) has
experienced the problems presented by virtually all
available conventional and specialized secondary
standards. Among these are: instrument accuracy,
resistance shifts caused by load, temperature or
environmental changes, difficulty in measurement of
last digits, limitation on usable frequency, size and ease
of setting.
• No humidity effect: resistive element hermetically
sealed against moisture
From intensive analysis of these problems, VFR
has developed a complete new design. With the
unequalled combination of the Bulk Metal® Foil resistor’s
performances, Vishay Foil resistors offer accuracy,
stability and versatility never before combined in a
secondary standard resistor.
• Four terminal constructions with an additional
ground socket
The FSR reduces these major problems to insignificance:
accuracy, resistance shift, frequency, and size.
• Thermal stabilization time
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