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THUMB WHEEL DECADE RESISTANCE BOX

Type:7400A

Thumb Wheel Resistance Box Type 7400-A is a resistance standard substitution instrument. It can be used as a source of resistance of a known accuracy of the order of + 1%. A known value of resistance (ranging from 1 ohm to 1 Meg ohm) can be drawn from the instrument and can be substituted in an electrical circuit or can be used for resistance simulation.

DECADERESISTANCE PER STEP IN ΩTOTAL RESISTANCE IN ΩMAX. POWERMAX. VOLTAGEACCURACY:ACCURACY:ACCURACY:
STANDARD MODELPRECISION MODELULTRA PRECISION MODEL
INDIVIDUAL DIALFSDINDIVIDUAL DIALFSDINDIVIDUAL DIALFSD
First0.010.091.0W/2.0W250 Volts FSD15% 15% 10% 
Second0.10.91.0W/2.0W5% 5% 5% 
Third191.0W/2.0W1%1%1% 1% 
Fourth10901.0W/2.0W1% 0.50% 0.50% 
Fifth1009001.0W/2.0W1% 0.50% 0.10% 
Sixth1.0 k9.0 k1.0W/2.0W1% 0.50% 0.10% 
Seventh10.0 k90 k1.0W/2.0W1% 0.50% 0.10% 
Eight100 k900 k1.0W/2.0W1% 0.50% 0.10% 
Ninth1.0 M9.0 M1.0W/2.0W1% 0.50%0.50%0.10%0.10%
Tenth10 M 90 M1.0W/2.0W1% 0.50% 0.10% 
Total Resistance Available: 99.99999999 Meg Ohm
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