These standards grade Kelvin-Varley voltage dividers They are highly accurate, stable, and lin ear in struments for use in many applications requiring accurately known voltage or current ratios. In particular, the KVD series is es pecially appropriate for use in bridge circuits, providing two arms of a bridge with a very well known ratio. Applications include linearity determination, the measurement of voltage and resistance, and the calibration of voltage, current, and resistance.
Calibration: Self calibrating; has internal oil bath
Ratio Range: 0 to 1.0 input for 1.0 terminal;
0 to 1.1 of input for 1.1 terminal
Resolution: 0.1 ppm with 7 decades
Absolute Linearity: ±0.1 ppm for S = 0.1 to 1.1;
±0.1(10S)1/3 ppm for S = 0 to 0.1.
Short-Term Linearity Stability:0.1 ppm/30 days under standard laboratory conditions and VIN <100 V.
Long-Term Linearity Stability:±1.0 ppm of input/year for S=0.1 to 1.1;±(10S)2/3 ppm of input/year for S=0 to 0.1;Self calibration restores linearity to 0.1 ppm.
Temperature Coefficient of Linearity:<±0.1 ppm °C for S=0.1 to 1.1;<±0.1 (10S)2/3 ppm/°C for S=0 to 0.1.
Power Coefficient of Linearity:<±0.2 ppm of input/W for S=1.1 to 0.1;<±0.2 (10S)2 ppm of input/W for S=0.1 to 0.
Maximum Input Power: 10 W at 1.0 INPUT; 11 W at 1.1 INPUT.
Maximum Input Voltage: 1000 V at 1.0 input terminal;
1100 V at 1.1 input terminal;
Input Resistance: 100 kΩ ±50 ppm at 1.0 INPUT;
110 kΩ ±50 ppm at 1.1 INPUT.
Maximum Output Resistance: 66 kΩ, determined by shorting across the input and measuring the resistance across the output terminals.
Terminals:High quality low thermal emf gold plated tellurium copper binding posts.
Dimensions:5.25" high rack panel; 13.3 H x 48.2 W x 33.0 D (5.25” x 19.0” x 13.0”).
Weight: 8.2 kg (18 lb).
