The GR 1455 Kelvin-Varley Voltage Dividers provide accurately known voltage ratios from 0.00001 to 1.00000 for use in many common measurements:
A resistive divider of the Kelvin-Varley type, the 1455 has precision resistors throughout (rather than in selected positions only) for over-all high accuracy. Linearity is as low as 0.02 ppm of input.
Match your needs exactly. Select input impedance. voltage rating, frequency range, 4- or 5-d ial resolution, bench or rack mounting.
Temperature Coefficient: <20 ppm for each resistor. Since voltage ratios are determined by resislors of simi lar conslruc lion, nel ambient lemperature effecls are very small.
BASIC SPECIFICATIONS
| 1455-A | 1455-B | 1455-BH | |
| Number of Dials: | 4 | 5 | 5 |
| Input Resistance: | 10 kΩ | 10 kΩ | 100 kΩ |
| Accuracy of Input R: (ppm) | 150 | 150 | 150 |
| Input Voltage Rating: | 230 V | 230 V | 700 V |
| Frequency Response: | 850 kHz | 690 kHz | 69 kHz |
| Resolution: (ppm of input) | 100 | 10 | 10 |
| Linearity (sum of A & B) | |||
| A. Absolute Linearity | |||
| 0.00001 to 0.00010 | n/a | 0.03 | 0.02 |
| 0.00010 to 0.00100 | 0.3 | 0.3 | 0.2 |
| 0.00100 to 0.01000 | 2 | 3 | 2 |
| 0.01000 to 0.10000 | 15 | 10 | 10 |
| 0.10000 to 1.00000 | 30 | 20 | 20 |
| B. Terminal Linearity (ppm of input). | |||
| FOUR-TERMINAL (low output terminal) | 0.04 | 0.04 | 0.004 |
| THREE-TERMINAL | 0.2 | 0.2 | 0.02 |
