Make accurate calibrations and transfer measurements over three decades of resistance with the HATS-LR Series.

The Benefits of Using Transfer Standards
In order to perform calibrations with a high degree of accuracy, reference standards must be employed at every range or decade of the measuring or calibration instrumentation. Clearly, this can be difficult and costly since these standards must be highly stable and their precise values must be known with a high degree of certainty and sufficient resolution. To minimize the cost and difficulty, more practical means of performing such calibrations is to use transfer standards. If one has a single standard that is calibrated by a national laboratory, one can then compare the transfer standards to the certified standard by ratio techniques. A full tutorial may be found here.

The HATS-LR Series of transfer standards consist of 12 matched resistors, of value R, which may be connected in series or parallel combinations to produce any number of values such as R/10, R, and 10R, all with the same known deviation, thereby allowing progressive transfers to higher and lower decades. For example, the 10 kΩ transfer standard may be used to transfer calibrations across 1 kΩ, 10 kΩ and 100 kΩ. The HATS-Y Series (p. 3) of transfer standards may be used for resistances greater than or equal to 1 MΩ.