HATS-Y HIGH RESISTANCE TRANSFER STANDARD

HATS-Y High Resistance Decade Transfer Standard.
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.

• Steps from 1 MΩ to 10 MΩ

• Transfers from 0.1 MΩ to 100 MΩ

• 11 precisely matched resistors High transfer accuracy - better than 2 ppm

The HATS-LR Series of transfer standards consist of 11 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 1 M transfer standard may be used to transfer calibrations across 100 k, 1 M and 
10 M.
The HATS-LR Series of transfer standards may be used for resistances 100 k and under.
These transfer standards may also be employed as very precise and stable voltage dividers.

Resistor Type:  Wirewound, hermetically sealed, low inductance.
Step Size: 100 k, 1 M, or 10 M.
Accuracy:
Initial:
         100 kOhm  ±10 ppm
         1 MOhm     ±15 ppm
         10 MOhm   ±20 ppm
Long Term: <±20 ppm for 1 year; <±30 ppm for 2 years;
Transfer : <±2 ppm.
Matching:
Accuracy: within 10 ppm
Temperature Coefficient: within 5 ppm/°C.
Temperature Coefficient : <±5 ppm/°C.
Calibration Accuracy: ±10 ppm or better for all steps;
Calibration Conditions: 23°C, with meter guard applied to COM and ground applied to G, at low power, traceable to NIST. Initial calibration data supplied with instrument.
Leakage Resistance: >10 T from terminal to case.
Power Coefficient: <±0.05 ppm/mW per resistor.
Maximum Applied Input: 2500 V, or 1 W per resistor, or 5 W for entire unit, whichever limit applies first. 3500 V peak, between any terminal and case.
Dimensions: 43.2 cm W x 14.2 cm H x 13.5 cm D (17" x 5.6" x 5.3").
Weight: 3.6 kg (8 lb.).

HATS-Y-100K 100 kOhm/Step Transfer Standard
HATS-Y-1M 1 MOhm/Step Transfer Standard
HATS-Y-10M 10 MOhm/Step Transfer Standard