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Datasheet generated 2026-10-07
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ELMA BM 257 True RMS (42257)

Elma Instruments · Measurement & Inspection Tools · Test & Measurement
Part Number
42257  ·  HS 9031.80
ELMA BM 257 True RMS (42257)

Elma Instruments 42257 True RMS mini-multimeter with two new functions. Auto-Check is an intelligent function that automatically detects and selects AC voltage, DC voltage and continuity / resistance.

Technical Specifications

Manufacturer part number (MPN)42257 EAN / GTIN: 5706445410293 Sales unit: pcs Package quantity: 20 pcs Current supply: Battery Measured value memory: Yes Indication: Analogue/digital Measuring range selection: Manual/automatic True RMS measurement: Yes Continuity test: Yes Isolation resistance measuring range: 0–60 MOhm Interface: No Capacitance measurement: Yes Frequency measurement: Yes With decibel measurement (dB): Yes Measurement principle: True root mean square Data hold: Yes IR interface: No Explosion-tested version: No Analogue bar graph display: Yes Resistance test/diode test: Yes Inductance measurement: No Lowest resolution
DC voltage0.1 mV Lowest resolution
DC current1 µA Lowest resolution
AC voltage0.1 mV Lowest resolution
AC current1 µA Lowest resolution, resistance: 0.1 Ohm With conductivity measurement: No Max. voltage measuring range AC: 1000 V Max. voltage measuring range DC: 1000 V Max. current measuring range
AC10 A Max. current measuring range, DC:

Properties

MOQ1

Cross-References

Attached Documents