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Specifications
- Display
- 3 digits and polarity sign, seven-segment
- Basic DC accuracy
- DC voltage 0.1%; AC voltage 1.1%; DC current 0.2%; AC current 1%; resistance 0.2%; 1 °C
- Power supply
- 6 × R6 cells (max 300 mW) or 220 V adapter (max 6 VA)
- Weight
- 0.3 kg
- Function
- DC and AC voltage and current, resistance, temperature
- Ranges
- DC 0–1000 V; AC 0–350 V; DC and AC 0–1 A; 1 kΩ – 1 MΩ; −20 … +60 °C
- Frequency
- 40 Hz – 25 kHz (AC voltage)
Sources: [1]
Description
The DTM 1900 is a portable digital thermo-multimeter for general use, made by IEMI in Bucharest [1]. It measured DC and AC voltage and current, resistance and temperature; it was light, with a low consumption, overvoltage protection on all ranges and automatic polarity detection, and was meant for research, laboratory work and repairs, especially for heat-transfer measurements and chip temperatures [1]. It weighed 300 g without its batteries [1].
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Schematics
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