Martindale TEK904 Enhanced Decade Resistance Box
The Martindale TEK904 Enhanced Decade Resistance Box provides selectable resistance for laboratory and field situations. Martindale describes it as reliable and versatile, with typical uses in education and calibration applications.
The TEK904 uses high-quality rotary switches across 7 decades. As a result, users can set resistance from 1Ω to over 11MΩ. It also includes an extra terminal, so the unit can be configured as an accurate potential divider when required.
Efficient Resistance Selection
The rotary switch layout allows users to select resistance values directly across the available decades. In addition, the TEK904 provides 1% accuracy and a typical residual zero resistance of less than 150mΩ.
For use as a variable decade resistance box, Martindale states that users should make the required connections to the red terminals. Meanwhile, for divider use, the divided voltage appears between the black terminal and the centre red terminal, with the division ratio depending on the decade settings.
Built for Bench and Field Use
The TEK904 has a tough, rugged design and suits both laboratory and field situations. Moreover, the supplied mounting brackets support bench or wall-mounted use. The unit measures 345 x 71 x 51 mm and weighs approximately 536g.
Key Features
- Enhanced decade resistance box for laboratory and field situations
- Typical uses include education and calibration applications
- 7-decade high-quality rotary switch selection
- Resistance range from 1Ω to over 11MΩ
- Incremental accuracy of ±1% of setting
- Typical residual zero resistance of less than 150mΩ
- Extra terminal allows potential divider configuration
- 1kΩ divider resistor accuracy of ±1%
- Maximum applied voltage of 100 VDC
- Includes mounting brackets and instructions
Technical Specifications
| MPN | MARTEK904 |
|---|---|
| EAN | 5036162186134 |
| Product type | Enhanced decade resistance box |
| Resistance range | 1Ω to over 11MΩ |
| Decades | 7 |
| Typical residual zero resistance | < 150mΩ |
| Incremental accuracy | ±1% of setting |
| 1kΩ divider resistor accuracy | ±1% |
| Maximum power per resistor | 0.6 W |
| Maximum applied voltage | 100 VDC |
| Temperature coefficient | 50 ppm/°C |
| Operating environment | 0°C to 50°C at < 70% RH |
| Maximum current, x1Ω decade | 770 mA |
| Maximum current, x10Ω decade | 240 mA |
| Maximum current, x100Ω decade | 77 mA |
| Maximum current, x1kΩ decade | 24 mA |
| Maximum current, x10kΩ decade | 7.7 mA |
| Maximum current, x100kΩ decade | 2.4 mA |
| Maximum current, x1MΩ decade | 0.77 mA |
| Dimensions | 345 x 71 x 51 mm |
| Weight | 536g approx. |
| Warranty | 2 years |
What’s Included
- 2 x mounting brackets
- Instructions
