®
®
14
triangle, pulse trains, spikes, as well as distorted waveforms with
the presence of harmonics. Harmonics may cause :
1) Overheated transformers, generators and motors to burn out
faster than normal
2) Circuit breakers to trip prematurely
3) Fuses to blow
4) Neutrals to overheat due to the triplen harmonics present on
the neutral
5) Bus bars and electrical panels to vibrate
Crest Factor
Crest Factor is the ratio of the Crest (instantaneous peak) value
to the True RMS value, and is commonly used to define the
dynamic range of a True RMS DMM. A pure sinusoidal waveform
has a Crest Factor of 1.414. A badly distorted sinusoidal
waveform normally has a much higher Crest Factor.
4) OPERATION
CAUTION
Before and after hazardous voltage measurements, test the
voltage function on a known source such as line voltage to
determine proper meter functioning.
AutoV (LoZ) mode
AutoV
automatically selects measurement function of DCV or
ACV, based on their input levels via the test leads. The input also
provides a low ramp-up impedance (LoZ) to drain ghost voltages*.
13
1. 3-5/6 digits 6000 counts
LCD display
2. Push-buttons for special
functions & features
3. Selector to turn the Power
On or Off and Select a
function
4. Input Jack for 10A (20A
for 30sec) current
function
5. Input Jack for all functions
EXCEPT µA, mA & A current
functions
6. Common (Ground
reference) Input Jack for
all functions
7. Input Jack for µA and mA
current function
VI) PRODUCT DESCRIPTION :
Note :
Top of the line model is used as representative for illustration
purposes. Please refer to your particular model for function
availability.
True RMS :
RMS (Root-Mean-Square) is a term used to describe the effective
or equivalent DC value of an AC signal. True RMS is the term which
identifies a DMM that responds accurately to the effective RMS
value regardless of the waveforms such as: square, sawtooth,
