Promax PD-183, Instruction Manual

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USER’S MANUAL PD-183
07/2015 Page 11
4 OPERATING INSTRUCTIONS
Before making any measurements always examine the instrument
and accessories used with the instrument for damage,
contamination (excessive dirt, grease, ect.) and defects. Examine
the test leads for cracked or frayed insulation and make sure the
lead plugs fit snugly into the instrument jacks. If any abnormal
conditions exist do not attempt to make any measurements.
4.1 Auto power off
Multimeter will automatically be power off after 45 minutes without
selecting nor pressing any function or button
4.2 Input warning beeper
The Input Warning Beeper is a feature to protect the meter and you
from unintentional misuse. If the
DMM is set to measure a voltage
while the test leads are plugged into a current jack, very high current
could result when the test lead tips are placed to the voltage test
point.
This feature warns you that the test lead needs to be changed from
a current jack to the voltage jack.
All current ranges are fused with fast acting ceramic fuses as an
added protection.
4.3 True rms measurements
This multimeter permits direct measurement of the true RMS value
of a signal. This is the best way to measure parameters used for
measurements relating to power.