TRMS multimeter and insulation measuring device with 30,000 digits. The METRAHIT ISO is a digital multimeter with insulation measurement. It is robust and reliable for professional use and has an attractive design with housings made of impact-resistant plastic and is technically state-of-the-art. METRAHIT ISO is a portable and robust measuring device, especially for servicing household appliances in the 'white goods' category, electrical machines and vehicles, e.g. industrial trucks, and electrical systems, e.g. photovoltaic systems. It is suitable for field use and has an internal mains-independent power supply. TRMS multimeter with ± 30,000 digits resolution for voltage, current, temperature, etc. Insulation resistance measurement with 50 to 1000 V test voltage and external voltage detection Data logger for 15,400 measured values and IR interface to the PC. Safety-relevant tests for electrical devices and machines in a field-suitable device. Insulation resistance testing with test voltages up to 1000 V. Extensive multimeter functions for service and diagnosis, e.g. duty cycle measurement for setting up parallel-running motors. With its 30 multimeter functions and insulation resistance measurement, the METRAHIT ISO is recommended for mobile service on household appliances, electrical machines and vehicles, e.g. forklifts, and systems, e.g. photovoltaics. The device is suitable for field use and has an internal mains-independent power supply from 2 x 1.5V Mignon batteries. 30 multimeter functionsResolution ± 30,000 digits, 4 ¾ digitsBasic accuracy ±0.15% (VDC)Insulation resistance measurement up to 3.1 G¿ with external voltage detection and 50, 100, 250, 500, 1000 V test voltageVoltage ACTRMS, voltage AC+DC TRMS, voltage DC, level dB, relative value ¿REL, frequency, resistance, diode test, continuity test, capacity, current ACTRMS, current AC+DCTRMS, temperature with Pt 100/1000 sensors and K thermocouplesAdditional filter function and voltage measurement with reduced input resistance to limit interferenceAutorange current measurement from 100 nA to 10 A via a socket and a fuseClip function for the TRMS Current measurement with sensors and convertersAutomatic and manual measuring range selectionZero point setting ZEROAutomatic measured value storage DATA / MIN / MAXData storage for 15,400 measured values for long-term measurements as a data loggerInfrared interface for communication with the PCLarge, light blue illuminated display with extra large digits (15mm) and analogue bar graph for dynamic processesSeparate battery and fuse compartmentPower supply connection for battery-independent operationInternal mains-independent power supplyHousing in IP 54, dust and splash-proofPatented automatic socket lock ABSMeasurement category 600 V CAT III, 1000 V CAT IIRubber protective cover to protect against shock and impact. DAkkS calibration certificate included36-month guarantee on material and manufacturing defects. Scope of delivery: 1 x multimeter METRAHIT ISO 1 pair of safety measuring leads (1,5 m) with 4 mm test probes, 1000 V CAT III, 600 V CAT IV (KS17-2) 2 x batteries 1.5 V, type AA 1 x short operating instructions in German/English 1 x DAkkS calibration certificate 1 x rubber protective cover