Resistance Standard
Specification
|
| Type 5685A |
Values : 1, 10, 25, and 100
Ohms |
| Type 5685B |
Values : 1,000 and 10,000
Ohms |
| Calibrated accuracy |
3ppm for 1, 10, 100, 1,000
and 10,000 Ohms
5ppm for 25 Ohms |
| Accuracy of adjustment |
+/- 20ppm |
| Stability |
2ppm / year |
| Temperature Coefficient of Resistance |
typically 2ppm /°C |
| Recommended Dissipation |
10milli-Watts |
| Maximum Dissipation |
1 Watt |
| Approximate Load Coefficient |
6ppm / Watt |
| AC/DC Transfer Error up to 1592 Hz |
5ppm for 1 Ohm
1ppm for values 10 to 10,000 Ohms |
| Construction |
Element: - Strain
free, immersed in dry oil
Top Panel: - High Quality Bakelite with PTFE inserts |
| Terminals |
Current |
0BA copper |
| Potential |
4BA copper |
| Earth |
6BA brass screw |
| Dimensions |
Container: - 114 x 76 mm
diameter
Overall: - 140 x 83 mm diameter |
| Net Weight |
0.7kg approximately |