METRAHIT⏐X-TRA⏐PRO⏐BASE TRMS Digital Multimeters is a multi-purpose electrical instrument produced by Gossen-Metrawatt GmbH of Germany. It is suitable for applications in electrical engineering, electrical installation, laboratory, telecommunications, training, etc.
The METRAHIT X-TRA Pro Base is a hand‑held TRMS digital multimeter designed for electrical engineering, laboratory and field use. It offers RMS voltage and current measurement, a 1 kHz low‑pass filter, temperature measurement with Pt100 sensors, broad‑range capacitance, frequency and keying‑ratio measurement, and a clip‑on current sensor with adjustable transformation ratio.
The instrument includes a 4‑place LCD with analog bar‑graph, background illumination, internal clock, 4 MBit memory for about 15 400 readings, and a bidirectional infrared interface for PC data transfer via an optional USB adapter. Safety features comprise overload protection up to 1000 V, automatic shutdown after 10‑59 minutes of inactivity, and an IP 52 protective rubber cover.
| Display Digits | 11,999 digits |
|---|---|
| Current Measurement Range | 10 nA – 10 A (continuous), 16 A (short periods) |
| Voltage Measurement Category | 600 V CAT IV, 1000 V CAT III |
| Frequency Response | Up to 20 kHz |
| Memory Capacity | 4 MBit / 540 kB (~15 400 measurements) |
| Display Size | 65 mm × 36 mm LCD |
| Overload Protection Voltage | Up to 1000 V in all functions |
The instrument powers off automatically after 10 to 59 minutes of inactivity when no keys or the rotary switch are used, unless continuous operation mode is selected.
Overload protection limits the instrument to 1000 V in all functions and provides acoustic warnings for voltages above 1000 V or currents above 10 A/16 A.