4 terminal construction, high stability resistance standard
– Wide range 0.0001 ohm to 1 Mega ohm
– Excellent load coefficient
The RS3 range also offers a high current carrying capability which makes them ideal for applications where precise current needs to be measured.
| RS3 SPECIFICATIONS | |||||
|---|---|---|---|---|---|
| Model | Value | Uncertainty of Adjustment @20°C | Uncertainty of Certification | Temp Coeff Typical 15 to 20°C | Stability Over 1 Year |
| RS3/0001 | 0.0001Ω | 0.02% | ±200ppm | 20ppm/°C | 0.0025% |
| RS3/001 | 0.001Ω | 0.01% | ±50ppm | 25ppm/°C | 0.0025% |
| RS3/01 | 0.01Ω | 0.01% | ±25ppm | 10ppm/°C | 0.001% |
| RS3/02 | 0.02Ω | 0.01% | ±50ppm | 10ppm/°C | 0.001% |
| RS3/05 | 0.05Ω | 0.01% | ±50ppm | 10pm/°C | 0.001% |
| RS3/0.1 | 0.0.1Ω | 0.003% | ±25ppm | 10ppm/°C | 0.001% |
| RS3/1 | 1Ω | 0.003% | ±25ppm | 10ppm/°C | 0.001% |
| RS/10 | 10Ω | 0.003% | ±25ppm | 10ppm/°C | 0.001% |
| RS3/25 | 25Ω | 0.005% | ±25ppm | 10ppm/°C | 0.001% |
| RS3/50 | 50Ω | 0.005% | ±25ppm | 3ppm/°C | 0.001% |
| RS3/100 | 100Ω | 0.003% | ±25ppm | 3ppm/°C | 0.001% |
| RS3/250 | 250Ω | 0.005% | ±25ppm | 3ppm/°C | 0.001% |
| RS3/1K | 1kΩ | 0.003% | ±25ppm | 3ppm/°C | 0.001% |
| RS3/10K | 10kΩ | 0.003% | ±25ppm | 3ppm/°C | 0.001% |
| RS/100K | 100kΩ | 0.003% | ±25ppm | 3ppm/°C | 0.001% |
| RS/1M | MΩ | 0.01% | ±25ppm | 3ppm/°C | 0.002% |
| Model | Dissipation Max in Air Watts | Dissipation Max in Oil Watts | Max. I in Air (Amps) | Max. I in Oil (Amps |
|---|---|---|---|---|
| RS3/001 | 1 | 4 | 100 | 200 |
| RS3/001 | 1 | 4 | 32 | 60 |
| RS3/01 | 1 | 4 | 10 | 20 |
| RS3/02 | 1 | 4 | 7 | 14 |
| RS3/05 | 1 | 4 | 4.5 | 9 |
| RS3/0.1 | 1 | 4 | 3 | 6 |
| RS3/1 | 2 | 10 | 1.4 | 3 |
| RS/10 | 2 | 10 | 0.44 | 1 |
| RS3/25 | 1 | 10 | 0.2 | 1 |
| RS3/50 | 1 | 10 | 0.1 | 0.3 |
| RS3/100 | 1 | 10 | 0.1 | 0.3 |
| RS3/250 | 1 | 10 | 0.1 | 0.1 |
| RS3/1K | 1 | 10 | 0.03 | 0.030 |
| RS3/10K | 1 | 10 | 0.01 | 0.03 |
| RS/100K | 1 | 1 | 0.003 | 0.003 |
| RS/1M | 1 | 1 | 0.0002 | 0.0002 |
| Value in ohms | Typical time constant |
|---|---|
| 1Ω | + 0.34μH/Ω |
| 10Ω | + 0.18μH/Ω |
| 100Ω | + 0.03μH/Ω |
| 1kΩ | + 0.04μH/Ω |
| 10kΩ | + 0.6μH/Ω |
The resistance standards type RS3 were primarily designed as DC standards, however values above 0.1 ohm are non inductively wound and the adjacent AC characteristics are typical
| Dimensions | Top Panel | |
|---|---|---|
| 160mm high x 90mm diameter approx | Bakelite marked with the value, class designation and serial number | |
| Mass | Case | |
| 0.9kg approx | Light alloy, black anodised to give maximum heat radiation Thermometer Tube: Slotted extending the length of the resistance element | |
| Resistance Elemants | Label | |
| Manganin or Zeranin depending on the value. 100 ohm, 1, 10 and 100 kilo ohm low inductance winding on brass formers with PTFE insulation. 0.1, 1 and 10 ohm bifilar winding on cylindrical brass formers with PTFE insulation. 0.01, 0.001, and 0.0001 ohm resistance material in the form of straight rods or loops supported on 12mm brass conductors | Each standard is fitted with a label that describes its characteristic and operating parameters | |
| Terminals | Maximum Continuous Working Voltage | |
| Potential — Copper 4mm Current — Brass | 60Vdc / 30Vrms |
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