Highest-accuracy version of the IET Labs resistance substituters for the most exacting calibration and test
applications. The HARS-LX Series features a continuous rheostat as an option
• High accuracy - 20 ppm
• High stability - 5 ppm/yr
• Low temperature coeffcient - as low as 3 ppm/°C
• High-performance, solid silver contact switches
• Resistance from 10 mΩ to over 121 MΩ
• 1 mΩ or optional 20 µΩ resolution
• Hermetically sealed, low inductance resistors
• Precise fxed minimum resistance
Minimum resistance:
10 mΩ ± 0.5 mΩ; determined by the lowest settable position, "1", of
the 10 mΩ/step decade
Resistance repeatability:
Better than 100 µΩ, short-term, average value
Leakage Resistance:
>10 GΩ
Environmental Conditions:
Operating Temperature: 0ºC to 55ºC
Storage Temperature: -40ºC to 70ºC
Switch Type:
Multiple solid silver contacts; dust-tight diallyl-phthalate body.
To allow continuous rotation, a blank position is added on most
decades.
Terminals
Four, 5-way, gold-plated, tellutium-copper binding posts with
low thermal emf and low resistance, for four-terminal Kelvin
measurements, plus one binding post connected to case for
shielding. Rear outputs are available as an option.
