Your job requires that you have a rugged, reliable and accurate digital multimeter. The Fluke 17B digital multimeter does all that and more. Common basic electrical measurements plus temperature, frequency and duty cycle.
Features
600 V Cat III safety rating
50% bigger display with bright white backlight
Over-voltage indicator
Frequency and temperature measurement
Voltage, resistance, continuity, capacitance
Input terminal for ac and dc current measurements to 10 A current
Diode test, data hold