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
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.
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.
The FSR reduces these major problems to insignificance:
accuracy, resistance shift, frequency, and size.
Our Application Engineering department is available to
advise and make recommendations.
For non-standard technical requirements and special
applications, please contact us via email.
Note
(1)
Measured by comparison against Vishay Foil Resistor
standards which are traceable to NIST.
•
Stability: ±0.0005% (5 ppm) at 25°C, 12 months
• No humidity effect: resistive element hermetically
sealed against moisture
• Small size and robust construction
• Direct plug-in device for most DMM’s available in the
market
• Each unit is supplied with certificate of accuracy
(1)
• RF shielded case
• Four terminal constructions with an additional
ground socket
•
Vishay Foil resistors are not restricted to standard
values; specific “as required” values can be
supplied at no additional cost or delivery time
(e.g., 1K23456 vs. 1K)
• Thermal stabilization time <1 s (nominal value achieved
within 10 ppm of steady state value)
• Electrostatic discharge (ESD) at least to 25 kV
• Rise time: 1 ns effectively no ringing
• Current noise: 0.010 μVRMS/V of applied voltage
(<-40 dB)
• Voltage coefficient: 0.1 ppm/V
• Non inductive: 0.08 μH
• Non hot spot design
FIGURE 1—DEMONSTRATION FOR EASE OF INSTALLATION ON DMM
Document Number: 63223
Revision: 22-Apr-2012
For technical questions, contact:
foil@vishaypg.com
www.vishayfoilresistors.com
1
FSR (Secondary Standard Foil Resistor)
Vishay Foil Resistors
TABLE 1—FSR SPECIFICATIONS
(1)
NOMINAL
RESISTANCE
VALUE
(Ω)
1–9.9
10–49.9
50–99.9
100–150K
RESISTANCE
TOLERANCE
(2)
(PPM)
100
100
50
50
ACCURACY
(PPM)
50
10
10
10
TYPICAL TCR
(PPM/°C)
+15°C TO +45°C
±1
±0.6
±0.5
±0.3
STABILITY
AT 25°C,
12 MONTHS
(PPM)
5
5
5
5
MAX.
ALLOWED POWER
AT 25°C
(3)
(W)
0.2
0.2
0.2
0.2
Note
(1)
Each unit supplied is within the specified tolerance of the nominal ordered value. In addition, each unit is marked with the actual
measured value, such actual measured value being within the specified accuracy of the marked value.
(2)
For better tolerances, please contact Application Engineering via email below
(3)
Maximum voltage for a given resistance value is calculated using V = √PxR
TABLE 2—GENERAL SPECIFICATIONS
SPECIFICATIONS
Body and Cover
Finish
Weight
Terminals
Operating Temperature Range
PARAMETERS
High impact polystyrene
Black textured
45 grams
Nickel Silver
+15°C to +45°C
FIGURE 2—PHYSICAL DIMENSIONS
in Inches (Millimeters)
APPLICATIONS
In addition to the standard applications for decade boxes
and secondary standards, the FSR greatly extends the
range of usefulness for these instruments due to their high
frequency performance (e.g., R&D, incoming and out-
going inspection stations, quality control, laboratory, etc.).
www.vishayfoilresistors.com
2
Vishay Foil Resistors’ secondary standards are used for
adjustable, direct reading resistance and are substitution
components of: RTD, bridge, attenuators, voltage
dividers, multipliers, adjustable feedback resistors
(for use with operational amplifiers), ladder (network)
elements, etc.
Document Number: 63223
Revision: 22-Apr-2012
For technical questions, contact:
foil@vishaypg.com
FSR (Secondary Standard Foil Resistor)
Vishay Foil Resistors
FIGURE 3—TYPICAL TCR CURVES WITHIN
10 PPM WINDOW
Deviation ppm
(+15°C to +45°C): Typical TCR = ±0.3 ppm/°C
10 ppm
Window
+15
+20
+25
+30
+35
+40
+45
+50
FIGURE 4—TRANSIT CASE (OPTIONAL)
FSR device units can be supplied in a protective,
lightweight transit case, shielding the units against
potential damage or exposure to changes in
temperature during transportation. The protective case
can store up to 9 FSR units.
Temperature (°C)
TABLE 3—GLOBAL PART NUMBER INFORMATION
(1)
DENOTES PRECISION
Y
VALUE
R
=
K
=k
CHARACTERISTICS
0
= standard
1 to 999
= custom
Y
4
0
(1)
2
8
0
9
K
9
9
9
6
2
V
0
I
PRODUCT CODE
4028
= FSR
RESISTANCE TOLERANCE
V
= ±0.005%
T
= ±0.01%
I
= individual
C
= transit case
PACKAGING
FOR EXAMPLE: ABOVE GLOBAL ORDER Y4028 09K99962 V 0 I:
TYPE: FSR
VALUE: 9K99962Ω
ABSOLUTE TOLERANCE: ±0.005%
TERMINATION: standard
PACKAGING: individual
HISTORICAL PART NUMBER: FSR 9K99962 V I
FSR
MODEL
FSR
9K99962
RESISTANCE VALUE
9K99962Ω
V
TOLERANCE
V
= ± 0.005 %
T
= ± 0.01 %
I
PACKAGING
I
= individual
C
= transit case
Note
(1)
For non-standard requests, please contact Application Engineering
.
Document Number: 63223
Revision: 22-Apr-2012
For technical questions, contact:
foil@vishaypg.com
www.vishayfoilresistors.com
3
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Vishay Precision Group, Inc.
Disclaimer
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not limited to, the warranty expressed therein.
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Copyright Vishay Precision Group, Inc., 2014. All rights reserved.
Document No.: 63999
Revision: 15-Jul-2014
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