Prokit's Industries MT-2017 - Manual (Page 6)

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PCB. If it’s blown, replace it. (See fuse replacement.)
6. Avoid placing the meter where extreme shock or continuous
vibration is encountered and do not store in excessively hot
or damp places. Although very rugged, the meter is a
sensitive measuring device and should be handled carefully
& properly.
7. Do not check resistance, transistor, diode, LED, or
capacitance when live voltage or current input across the
circuit.
8. When the meter is not in use, keep the selector switch to the
“OFF” range position, this provides direct short across meter
movement for minimum needle bounce when transporting
meter.
9. If you should accidentally apply excessive voltage or current
on a certain range, disconnect the leads from the circuit as
quickly as possible, check instrument operation on that range
by applying peoper input. If the meter does not operate
peoperly, check fuse. If it is blown replace it. (See fuse
replacement.)