The Tinsley Model 4721 decade box is designed for the checking and calibration of insulation testers at voltages of up to 5000V DC.
The total range covered is from 1 kΩ to 1TeraΩ using specially selected resistors and a high quality switch mounted on an easy to read panel.
This resistance box is housed in a strong aluminium case with lid and carrying handle to provide an ideal solution to on-site and laboratory calibration of high resistance insulation testers.
The instrument can be supplied complete with a calibration certificate provided by our own in-house calibration laboratory.
Specifications
Switch Settings |
Max d.c. Volts |
Accuracy |
Temperature Coefficient |
1kΩ |
20V |
±0.1% |
15ppm/deg. C. |
10kΩ |
75V |
±0.1% |
15ppm/deg. C. |
100kΩ |
200V |
±0.1% |
15ppm/deg. C. |
1MΩ |
500V |
±0.1% |
25ppm/deg. C. |
10MΩ |
2000V |
±0.1% |
50ppm/deg. C. |
100MΩ |
3000V |
±1% |
100ppm/deg. C. |
1GΩ |
5000V |
±1% |
100ppm/deg. C. |
10GΩ |
5000V |
±1% |
100ppm/deg. C. |
100GΩ |
5000V |
±2% |
2000ppm/deg. C. |
1TΩ |
5000V |
±2% |
2000ppm/deg. C. |
| Open Circuit |
5000V |
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Overall Range |
1kΩ to 1TΩ in 10 steps with open circuit on eleventh position. |
Accuracy Stated at 20° C±1°C 10 to 50%RH |
Earthing |
Metal earth terminal on switch panel. |
Connections |
Plug-in shielded plugs with 1 metre shielded cable (2 off High and Low) |
Dimensions |
approximately 27 x 25 x 18 cm |
Net Weight |
approximately 2.5kg |
Can be supplied with calibration certificate. |
For more information about this product contact Tinsley
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