“KUSAM-MECO”
AN ISO 9001:2015 COMPANY
-13-
3) PRODUCT DESCRIPTION
1) 4 digits 9999 counts
dual displays
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) Common
(Ground reference)
Input Jack for all
functions
6) Input Jack for all
functions EXCEPT
current ( A, mA, A)
functions
7) Input Jack for milli-amp
& micro-amp current
functions
The analog bar graph provides a visual indication of
measurement like a traditional analog meter needle. It is excellent
in detecting faulty contacts, identifying potentiometer clicks, and
indicating signal spikes during adjustments.
Analog bar-graph
PC-Comm
MAX 10A
HBC FUSED
JACK
mA
V
OFF
Hz
D%nSF
KM 822sEX
Intrinsically Safe TRMS DMM
AUTO
SELECT
RANGE
HOLD
H
MAX 0.6A
HBC FUSED
T
2
T
1
MAX
1000V CATIV
JACK
mA
A
A
COM
V
!
Hz
V
mV
mV
A
Hz
A
Hz
10
0
m
AV
Mk
Hz
T1
T2
R C H
MAX-MIN
6
M
kHz
D%
n
SF
mVA
T1-T2
%
LoZ
4
7
6
5
3
2
1
D%
Hz
“KUSAM-MECO”
AN ISO 9001:2015 COMPANY
-14-
RMS (Root-Mean-Square) is the term used to describe the
effective or equivalent DC value of an AC signal. Most digital
multimeters use average sensing RMS calibrated technique to
measure RMS values of AC signals. This technique is to obtain
the average value by rectifying and filtering the AC signal. The
average value is then scaled upward (calibrated) to read the RMS
value of a sine wave. In measuring pure sinusoidal waveform, this
technique is fast, accurate and cost effective. In measuring non-
sinusoidal waveforms, however, significant errors can be
introduced because of different scaling factors relating average to
RMS values.
Average sensing RMS calibrated
True RMS is a term which identifies a DMM that responds
accurately to the effective RMS value regardless of the
waveforms such as: square, sawtooth, triangle, pulse trains,
spikes, as well as distorted waveforms with the presence of
harmonics. Harmonics may cause :
True RMS
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
