- Linearity better than 20 ppm (5-dial model)
- Input impedance: for 1455-A 10 kΩ & 1455-B, 1455-BH 100 kΩ
- High-frequency model, down 3 dB at 7.5 MHz
The GR 1455 Kelvin-Varley Voltage Dividers provide accurately known voltage ratios from 0.00001 to 1.00000 for use in many common measurements:
- 1. Voltage gain or attenuation
- 2. Linearity of potentiometers and other controls
- 3. Frequency response of audio and rf networks
- 4. Transformer turns ratio
- 5. Voltmeter calibration
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.
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 |