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• Choose the proper range and function for the measurement. Do not try voltage or current • Do not exceed the limits shown in the table below: FUNCTION INPUT LIMIT Volts 0 - 500 peak volts AC Ohms (resistance)* 0 - 1.12 megohms Frequency Measured 0 - 10 kHz Temperature -58 - 1100F * Ohms cannot be measured if voltage is present. Ohms can be measured only in a non-powered circuit. • Voltage between any terminal and ground must not exceed 500v DC or 500v peak AC. • Use caution when measuring voltage above 25v DC or 25v AC. • The circuit being tested must be protected by a 10A fuse or circuit breaker. • Use the low current shunt to measure circuits up to 10A. Use the high current clamp to • When testing for the presence of voltage or current, make sure the meter is functioning • When measuring current, connect the meter in series with the load. • Disconnect the live test lead before disconnecting the common test lead. • When using the meter function, keep the DRB away from spark plug or coil wires to avoid 5.3 Warnings and Cautions 5.3.1 Road Test Warnings Some complaints will require a test drive as part of the repair verification procedure. The purpose CAUTION: Before road testing a vehicle, be sure that all components are reassembled. T screen while in motion. Do not hang the DRBIII T from the rear view mirror or operate it yourself. Have an assistant available to operate the DRBIII T . 5.3.2 Vehicle Damage Cautions Before disconnecting any control module, make sure the ignition is ‘‘off’’. Failure to do so could When testing voltage or continuity at any control module, use the terminal side (not the wire end) G E N E R L I N F O R M A T I O N 24 |