Description
The Keysight 34420A is a 7.5-digit nanovolt and micro-ohm meter designed for measurements where conventional DMMs run out of sensitivity and noise performance. It has two voltage input channels for direct or differential low-level DC voltage readings, a built-in current source for four-wire low-resistance tests, and temperature measurement with thermocouples, RTDs and thermistors. GPIB and RS-232 interfaces allow use in automated systems. Metrology labs, materials researchers and engineers characterizing superconductors, thermocouples and contact resistance rely on it.
Key features
- 7.5-digit resolution with very low noise
- Two voltage channels with ratio and difference functions
- Four-wire resistance with built-in current source and offset compensation
- Temperature measurement with thermocouples, RTDs and thermistors
- Analog output for chart recording
- GPIB and RS-232 interfaces
Typical applications
- Low-resistance and contact resistance measurement
- Thermocouple and thermal EMF studies
- Resistance standard and bridge comparisons
- Superconductor and materials research
Specifications
| Brand | Keysight Technologies |
|---|---|
| Model | 34420A |
| Product type | Nanovolt / micro-ohm meter |
| Resolution | 7.5 digits |
| DC voltage ranges | 1 mV to 100 V |
| Resistance ranges | 1 Ω to 1 MΩ |
| Input channels | 2 voltage channels |
| Temperature sensors | Thermocouple, RTD, thermistor |
| Interfaces | GPIB, RS-232 |
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