4720 Series
Designed for the checking and calibration of insulation testers at voltages of up to 5000V DC, the Tinsley Model 4720 high resistance decade boxes provides up to 9 decades of resolution.
The total range covered is from 1 kΩ to 1,111,111,110kΩ using specially selected resistors and high quality switches mounted on an easy to read panel.
These decade resistance boxes are housed in strong polymer portable cases with lids and carrying handles to provide an ideal solution to on-site and laboratory calibration of high resistance insulation testers.
The instruments can be supplied complete with a calibration certificates provided by our own in-house calibration laboratory.
For more information about this product contact Tinsley
Specifications
| | | 4720 | Value | Accuracy | Max. Power | Max. V/Step | Temp. Coeff | |
| | 4720/2 | | 1 | 10 x 1kΩ | ±0.1% | 1Watt | 10 | 15ppm/°C |
| | | 2 | 10 x10kΩ | ±0.1% | 1Watt | 50 | 15ppm/°C | |
| | | 3 | 10 x100kΩ | ±0.1% | 1Watt | 150 | 15ppm/°C | |
| | 4720/3 | 4 | 10 x 1MΩ | ±0.1% | 1Watt | 300 | 25ppm/°C | |
| | 5 | 10 x 10MΩ | ±0.15% | 1Watt | 500 | 50ppm/°C | ||
| | 6 | 10 x 100MΩ | ±1.0% | 2.3Watt | 1,000 | 100ppm/°C | ||
4720/1 | | 7 | 10 x 1GΩ | ±1.0% | 3.5Watt | 5,000 | 100ppm/°C | |
| | 8 | 10 x 10GΩ | ±2.0% | 3.5Watt | 5,000 | 100ppm/°C | ||
| | 9 | 5 x 100GΩ* | ±4.0% | 1.3Watt | 5,000 | 2,000ppm/°C |
| Note:- Decades 6, 7, 8 and 9 limited to a maximum of 5000 volts. |
Weight 8.8kg Dimensions 47cm x 37cm x 18cm
Note * this decade is extended to 10 x 100GΩ for the type 4720/4 only
Accessories
A4720-110: A pair of open ended test leads fitted with special high insulation plugs for connection to the decade box are provided.
For more information about this product contact Tinsley
