The Draper DMM402 is a professional insulation resistance meter designed for electrical testing and diagnostic work. This auto-ranging digital multimeter combines standard electrical measurement capabilities with specialist insulation testing across four voltage ranges, making it an essential tool for electricians and electrical contractors conducting installation testing and fault-finding. Equipped with a backlit LCD display and analogue bar-graph scale, the meter provides clear readings in varying light conditions whilst allowing quick visual reference of measurement trends. The device measures DC and AC voltage up to 1000V across five ranges, with resistance testing capabilities and continuity checking supported by an audible buzzer for efficient circuit verification. The insulation testing function operates at 100V, 250V, 500V and 1000V test voltages, enabling compliance testing to BS 7671 requirements for electrical installations. The data hold feature allows readings to be locked for recording in confined spaces or awkward positions. An automatic power-off function preserves battery life during extended site work, whilst the included carry case protects the meter during transport between jobs. Features and Benefits: • Auto-ranging with analogue bar-graph scale for quick visual reference • Multiple insulation test voltages (100V, 250V, 500V, 1000V) for comprehensive electrical testing • Backlit LCD screen enables clear readings in poor lighting conditions • Continuity buzzer allows hands-free circuit verification • Data hold function for recording measurements in difficult positions • Automatic power-off feature extends battery life Specifications: AC Current: N/A AC Voltage: 400mV/4V/40V/400V/1000V Automatic Power Off: Yes Battery: 6 x AAA (not supplied) Capacitance: N/A DC Current: N/A DC Voltage: 400mV/4V/40V/400V/1000V Diode on/off Test: Yes Dimensions: 218mm x 200mm x 74mm Duty Ratio: N/A Dwell: N/A Frequency: N/A Insulation Test: 100V, 250V, 500V, 1000V Resistance (Ohms): 400O/4.000kO/40.00kO Symbol Unit Data Hold: Yes TACH: N/A Temperature Range: N/A Weight: 774g (approx.) Contents: 1 x Draper Expert Insulation Resistance Meter 1 x Carry case
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