Oil-Filled Constant Temperature Standard Resistance
The Model AR-1270 builds upon the AR-1250 by incorporating an integrated temperature control (constant temperature) device. It is equipped with a low-noise, DC 12-volt power supply capable of simultaneously powering up to eight standard resistors and indicating their operational status. The temperature control unit itself utilizes a low-noise fan for heat dissipation and features a 4 mm diameter temperature measurement port for convenient monitoring of the internal oil temperature and the status of the temperature control via an indicator light. The binding posts are machined from low-thermal-emf tellurium copper and offer standard 4mm plug/pressure connection terminals for leads.
Specifications
| Nominal Value | 1Ω、 10Ω 、 25Ω 、 100Ω 、 1KΩ 、 10KΩ 、 100KΩ 、 1MΩ |
| Operating Temperature | 28°C |
| Storage Temperature | 0°C ~ 45°C |
| Calibration Temperature | 28°C(Constant Temperature) ±0.5°C |
| Annual Stability | 1Ω、 10Ω:±3ppm(A)/±6ppm(B) 25Ω、 10KΩ:±1.5ppm(A)/±3ppm(B) 100KΩ、 1MΩ:±3ppm(A)/±6ppm(B) |
| Temperature Coefficient | ±0ppm/°C, 28°C(Constant Temperature) |
| Max. Power Consumption | 1W |
| Power Supply | DC12V, 1.2A (Low Noise) |
| Dimensions | 130mm (5.1") x 105mm (4.1") x 82mm (302") |
| Net Weight | Approximately 1 kg (2.2 lb) |
Performance Table
| Nominal Value | 1Ω | 10Ω | 25Ω | 100Ω | 1KΩ | 10KΩ | 100KΩ | 1MΩ |
| Anuual Stability A | ±3ppm | ±3ppm | ±1.5ppm | ±1.5ppm | ±1.5ppm | ±1.5ppm(B) | ±3ppm | ±3ppm |
| Anuual Stability B | ±6ppm | ±6ppm | ±3ppm | ±3ppm | ±3ppm | ±3ppm | ±6ppm | ±6ppm |
| Factory Calibration(23°C) | ±5ppm | ±3ppm | ±3ppm | ±3ppm | ±3ppm | ±3ppm | ±5ppm | ±5ppm |
| Max. Current | 500mA | 100mA | 50mA | 20mA | 10mA | 3mA | 1mA | 0.1mA |