Sper Scientific 840073 Multimeter - Auto-Ranging - Manual (Page 21)

G. Make Measurements(6)
3) If the magnitude of current is unknown, you should set rotary switch
to the higher range, then adjust to a lower range until a satisfactory
reading is obtained.
4) Measuring value inputs from “V
mA” or “10A” jack (red test leads)
and “COM” jack (black test leads).
5) For “V mA” input jack, the Meter has 0.5A/250V ( 5x20mm) ceramic
fuse overload protection, if overloaded, the fuse will burn up, so replace
with a new one with the same specification.
6) For 10A input jack, it is unfused. For your safety, every measuring time
should equal to or less than 10 seconds, times interval should be equal
to or over 15 minutes.
7) The meter would clatter with glitter of LCD reading if input exceeding
1000V or overloaded, which warns you pay extra attention.
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Model UT30A: OPERATING MANUAL