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.
Switch Settings |
Max d.c. Volts |
Accuracy |
Temperature Coefficient |
1kΩ |
5 0V |
0.1% |
0.015%/ °C |
10kΩ |
100V |
0.1% |
0.015%/ °C |
100kΩ |
500V |
0.1% |
0.015%/ °C |
1MΩ |
1000V |
0.1% |
0.025%/ °C |
10MΩ |
1000V |
0.1% |
0.05%/ °C |
100MΩ |
4000V |
1% |
0.1%/ °C |
1GΩ |
5000V |
1% |
0.1%/ °C |
10GΩ |
5000V |
1% |
0.1%/ °C |
100GΩ |
5000V |
4% |
2%/ °C |
1TΩ |
5000V |
4% |
2%/ °C |
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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 220 x 110 x 90 mm |
Net Weight |
approximately 0.8kg |
Supplied complete with calibration certificate and portable aluminium case with 1m leads |
For more information about this product contact Tinsley
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