S Series

Tolerance of ± 0.005 % and Load Life Stability of ± 0.005 %

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Document Number: 63001

4

Revision: 20-Nov-07

STANDARD OPERATIONS AND TEST

CONDITIONS

A. Standard Test Operations:

By 100 % Inspection

• Short-time overload (6.25 x rated power for 5 s)

• Resistance – tolerance check

• Visual and mechanical

By Sample Inspection

• TCR

• Environmental tests per table 3 on a quarterly basis to

establish performance by similarity

B. Standard Test Conditions:

• Lead test point: 0.5" (12.7 mm) from resistor body

• Temperature: + 23 °C ± 2 °C

• Relative humidity: per MIL-STD-202

IMPROVED PERFORMANCE TESTING (IPT)

The preceding information is based on product directly off

the

production

line. Improved

performance

(meaning

increased time stability with load and other stresses) is

available through factory conducted “Improved Performance

Testing”. The test routine is usually tailored to the users

stability objectives and product that has been screened can

be brought down to a potential load life of less than 50 ppm.

Various screen test routines are available and all anticipated

stresses must be taken into account before settling on one

specific

test

routine.

Our

Applications

Engineering

Department is prepared to discuss and recommend

appropriate routines given the full spectrum of anticipated

stresses and stability requirements.

Notes

1. Load life

ΔR maximum can be reduced by 80 %, please contact Applications Engineering Department.

2. Inductance (L) due mainly to the leads.

3. The resolution limit of existing test equipment (within the measurement capability of the equipment, or “essentially zero”.)

4. µV/°C relates to EMF due to lead temperature difference and µV/watt due to power applied to the resistor.

TABLE 4 - “S” SERIES SPECIFICATIONS

Load life at 2000 h

± 0.015 % (150 ppm)

Maximum

ΔR at 0.3 W/+ 125 °C

± 0.005 % (50 ppm)

Maximum

ΔR at 0.1 W/+ 70 °C

Load life at 10 000 h

± 0.05 % (500 ppm)

Maximum

ΔR at 0.3 W/+ 125 °C

± 0.01 % (100 ppm)

Maximum

ΔR at 0.05 W/+ 125 °C

Current Noise

0.010 µV

(RMS)/V of applied voltage (- 40 dB)

High Frequency Operation

Rise time

1.0 ns at 1 k

Ω

0.1 µH maximum; 0.08 µH typical

Capacitance (C)

1.0 pF maximum; 0.5 pF typical

Voltage Coefficient

0.1 µV/°C

Maximum; 0.05 µV/°C typical

1 µV/W

(Model S102C)