Kusam-meco KM 822EX User manual

LIST OF PRODUCTS
* Digital Multimeter * Digital AC & AC/DC Clampmeter
* AC Clamp Adaptor * AC/DC Current Adaptor
* Thermo Anemometer * Thermo Hygrometer
* Distance Meter * Digital Lux Meter
* Network Cable Tester * Power Factor Regulator
* Earth Resistance Tester * Digital Panel Meters
* DC Power Supplies * High Voltage Detector
* Calibrators * Gas Analysers
* Frequency Counter * Function Generator
* Phasing Sticks * Battery Tester
* Waterproof Pen Testers * Solar Power Meter
* EMF Detector
* Wood, Paper & Grain Moisture Meter
* Transistorised Electronic Analog & Digital Insulation
Resistance Testers(upto 10 KV)
* Digital Sound Level Meter & Sound Level Calibrator
* Digital contact & Non-contact Type Tachometer
* Digital Non-contact (infrared) Thermometer
* Maximum Demand Controller/Digital Power Meter
* Digital Hand Held Temperature Indicators
MODEL - KM 822EX
OPERATION MANUAL
INTRINSICALLY SAFE TRMS
DIGITAL MULTIMETER
®
An ISO 9001:2015 Company
®
OFFICE ADDRESS/SERVICE CENTER
st
Shop no.18, 1 Floor, CIDCO Shopping Complex, Plot # 9, Sector-7,
Rajiv Gandhi Marg, Sanpada, Navi Mumbai - 400705.
Sales Direct :[phone] Tel. :[phone]
Email : [email protected] Website : www.kusamelectrical.com
March 2022

“KUSAM-MECO” AN ISO 9001:2015 COMPANY
TAKE MEASUREMENTS CAREFULLY AND YOU’LL SPARE
YOUR METER AND YOURSELF, SOME PAIN.
Nearly every electrical engineer has a hand held Multimeter. We
sometimes take them for granted, until we damage them or “burn them
out”. If you incorrectly connect your DMM to a circuit or have the DMM on
wrong setting, you damage the meter and possibly hurt yourself. You can
also get into trouble if you try to measure the voltage across a charged
capacitor.
DMM users frequently burn their meters by trying to measure current the
same way as they measure voltage, Remember, you measure voltage
across a circuit, and current through a circuit. When you use the current
input, your DMM becomes a low impedance circuit element. If you
accidentally connect this low impedance path across your circuit, you’ll
effectively short-circuit it. You can, therefore send high current through
your meter and severely damage it. Unless the meter has a fused input,
you can even get an explosion or fire.
Even if you correctly insert your DMM into the circuit, you can still damage
your meter. Don’t try to measure current in excess of your meter’s
capacity. Handheld DMMs usually have a maximum current rating of 10A
or 20A.
To prevent excess current from flowing through your meter, always
disconnect the test leads from the circuit under test whenever you change
DMM functions, Set your meter to the correct function, say current and its
highest range for the setting, say 20A.
If you are measuring current in industrial environment, you can easily
exceed those ratings. The best way to avoid damage is to use a clamp
meter or to connect a clamp attachment to your DMM.
Next, connect the test leads before you apply power to the circuit. To be
safe, start by setting your meter to its highest range first.
1. SAFETY..............................................................................1
2. INTERNATIONAL ELECTRICAL SYMBOLS......................3
3. CENELEC DIRECTIVES....................................................3
4. FEATURES.........................................................................4
MARKING ON METER.......................................................4
10. WARRANTY......................................................................24
7. OPERATION.....................................................................15
8. MAINTENANCE...............................................................21
ELECTRICAL SPECIFICATIONS.......................................7
9. TEST CERTIFICATE........................................................23
6. PRODUCT DESCRIPTION..............................................13
5. SPECIFICATIONS..............................................................5
GENERAL SPECIFICATIONS............................................5
TABLE OF CONTENTS
TITLE PAGE
“KUSAM-MECO” AN ISO 9001:2015 COMPANY

“KUSAM-MECO” AN ISO 9001:2015 COMPANY
-01-
1) SAFETY
Terms in this manual
WARNING identifies conditions and actions that could
result in serious injury or even death to the
user.
CAUTION identifies conditions and actions that could
cause damage or malfunction in the
instrument.
The meter protection rating, against the users, is uble Do
insulation per IEC61010-1 2nd Ed., EN61010-1 2nd Ed., UL61010-1
2nd Ed. & CAN/CSA C22.2 No. 61010.1-0.92 to Category IV
1000Vac & Vdc.
This manual contains information and warnings that must be
followed for operating the instrument safely and maintaining the
instrument in a safe operating condition. If the instrument is used
in a manner not specified by the manufacturer, the protection
provided by the instrument may be impaired. The meter is
intended only for indoor use.
Terminals (to COM) measurement category:
V / mA A A : Category IV 1000VAC & VDCm /
Measurement Category IV (CAT IV) is for measurements
performed at the source of the low-voltage installation. Examples
are electricity meters and measurements on primary overcurrent
protection devices and ripple control units.
Per IEC61010-1 2nd Ed. (2001) Measurement Category
Measurement Category III (CAT III) is for measurements
performed in the building installation. Examples are
measurements on distribution boards, circuit- breakers, wiring,
including cables, bus-bars, junction boxes, switches, socket-
outlets in the fixed installation, and equipment for industrial use
and some other equipment, for example, stationary motors with
permanent connection to the fixed installation.
Measurement Category II (CAT II) is for measurements
performed on circuits directly connected to the low voltage
installation. Examples are measurements on household
appliances, portable tools and similar equipment.
WARNING
To reduce the risk of fire or electric shock, do not expose this
product to rain or moisture. To avoid electrical shock hazard,
observe the proper safety precautions when working with
voltages above 60 VDC or 30 VAC rms. These voltage levels pose
a potential shock hazard to the user. Do not touch test lead tips or
the circuit being tested while power is applied to the circuit being
measured. Keep your fingers behind the finger guards of the test
leads during measurement. Inspect test leads, connectors, &
probes for damaged insulation or exposed metal before using the
instrument. If any defects are found, replace them immediately.
“KUSAM-MECO” AN ISO 9001:2015 COMPANY
-02-

“KUSAM-MECO” AN ISO 9001:2015 COMPANY
-03-
Do not measure any current that exceeds the current rating of the
protection fuse. Do not attempt a current measurement to any
circuit where the open circuit voltage is above the protection fuse
voltage rating. Suspected open circuit voltage should be checked
with voltage functions. Never attempt a voltage measurement
with the test lead inserted into the A/mA or A input jack. Only m
replace the blown fuse with the proper rating as specified in this
manual.
Disconnect the test leads from the test points before changing
functions. Always set the instrument to the highest range and
work downward for an unknown value when using manual
ranging mode.
2) CENELEC DIRECTIVES
The instruments conform to CENELEC Low-voltage directive
2006/95/EC and Electromagnetic compatibility directive
2004 /108 / EC
INTERNATIONAL ELECTRICAL SYMBOLS
DC--Direct Current
AC--Alternating Current
Double Insulation or Reinforced insulation
Earth (Ground)
!Caution ! Refer to the explanation in this Manual
Caution ! Risk of electric shock
Fuse
CAUTION
“KUSAM-MECO” AN ISO 9001:2015 COMPANY
-04-
SPECIAL FEATURES :
— Splash / Drop Proof
— 1000V AC / DC
— USB Interface
— Dual Display with Backlit
— Intrinsically Safe
— Beep-Jack Audible & Visible Input Warning
— Relative Zero Mode
— PC Interface Capability & Data Hold
— Ex-rating : Ex ib IIA T4 Gb / ib I Mb.
— Fuse 1A / 1kV (IR10kA)for mA & mA (1000V HRC Fuse)
— Fuse 11A / 1kV (IR20kA) for A (1000V HRC Fuse)
— These meters comply to IEC SANS 600790:2000 & IEC SANS
60079-11:1999, which is electrical apparatus for applicable for use
in explosive gas atmospheres. Part 0 (general requirements) &
part 1 (intrinsic). The approved explosive protection rating of this
equipment is suitable for use in Zone 1 hazardous area. Group I
(coal mines) underground & Group II (surface).
FEATURES :
— DC Voltage Basic Accuracy 0.08%
— 4 Digit 10,000 counts large easy to read Backlight LCD display
— Fast Measurements, 5/sec; Fully Auto-Ranging
— Logic & Line Level Frequency
— Logic Level Duty Cycle Readings & Diode Tester
— Fast Audible Continuity
— Auto Power Off
— MTEx-MS/19.0358 X
— Ex Rating: Ex ib IIA T4 Gb
— Ex ib I Mb.
— IP 64
MARKING ON METER:

“KUSAM-MECO” AN ISO 9001:2015 COMPANY
-05-
SPECIFICATIONS :
GENERAL SPECIFICATIONS :
Sensing : AC True RMS
9999 counts: ACV, DCV, Hz & nS Display :
6000 counts: mV, mA, mA, A, Ohm & Capacitance.
AutomaticPolarity :
Digital Display : 5 per second nominal;Update Rate :
41 Segments Bar-graph: 60 per second max
Below approx. 7VLow Battery :
0°C to 45°COperating Temperature :
Maximum relative humidity 80% for Relative Humidity :
temperature up to 31°C decreasing linearly
to 50% relative humidity at 45°C
2Pollution degree :
-20°C to 60°C, < 80% R.H. Storage Temperature :
(With battery removed)
Operating below 2000mAltitude :
nominal 0.15 x (specified accuracy) / Temperature Coefficient :
°C @(0°C ~ 18°C or 28°C ~ 45°C),
or otherwise specified.
Double insulation per IEC61010-1 2nd Ed., Safety :
EN61010-1 2nd Ed., UL61010-1 2nd Ed. &
CAN/CSA C22.2 No. 61010.1-0.92 to
Category IV 1000Vac & Vdc.
: 12kV (1.2/50ms surge)Transient protection
“KUSAM-MECO” AN ISO 9001:2015 COMPANY
-06-
Terminals (to COM) Measurement Category:
V/A / mAmA : Category IV 1000VAC & VDC
Overload Protections:
mA & mA : 0.44A / 1000V DC/AC rms, IR 10kA, F fuse
A : 11A / 1000V DC/AC rms, IR 20kA, F fuse
V : 1050Vrms, 1450V peak
mV, W , & others : 600V DC/AC rms
Meets EN61326-1:2006 (EN55022, EN61000-3-2, E.M.C. :
EN61000-3-3, EN61000-4-2, EN61000-4-3,
EN61000-4-4, EN61000-4-5, EN61000-4-6,
EN61000-4-8, EN61000-4-11)
In an RF field of 3V/m:
Capacitance function is not specified
Other function ranges:
Total Accuracy = Specified Accuracy + 100 digits
Performance above 3V/m is not specified
Single 9V battery.Power Supply : Alkaline
5 mA typicalPower Consumption :
Idle for 30 minutesAPO Timing :
50mA typicalAPO Consumption :
208(L) X103(W) X 64.5(H) mm with holsterDimension :
635 gm with holsterWeight :
Test lead pair; battery installed; user's manual Accessories :
& Carrying Case.
USB interface kit BU-86X; B MH-01 Optional accessories :
Magnetic Hanger.

“KUSAM-MECO” AN ISO 9001:2015 COMPANY
-07-
ELECTRICAL SPECIFICATIONS :
Accuracy is (% reading digits + number of digits) or otherwise
o o
specified, at 23 C 5 C & less than 75% relative humidity. ±
True RMS voltage & current accuracies are specified from 10 %
to 100 % of range or otherwise specified. Maximum Crest Factor
< 2:1 at full scale & < 4:1 at half scale, and with frequency
components within the specified frequency bandwidth for non-
sinusoidal waveforms.
AC VOLTAGE
Range Resolution Accuracy
40Hz ~ 500Hz
±(0.8% rdg + 4 dgts)
±(2.0% rdg + 4 dgts)
50Hz ~ 60Hz
60.00 mV
9.999 V ±(0.5% rdg + 3 dgts)
600.0 mV
99.99 V
999.9 V
60.00 mV
9.999 V
600.0 mV
99.99 V
999.9 V
±(1.0% rdg + 4 dgts)
0.01 mV
1 mV
0.1 mV
10 mV
100 mV
0.01 mV
1 mV
0.1 mV
10 mV
100 mV
1) Specified from 30% to 100% of range.
2) For 3kHz ~ 15kHz only
Input Impedance : 10MW, 50pF nominal
(80pF nominal for mV ranges)
500Hz ~ 1kHz
±(2.0% rdg + 3 dgts)
±(1.0% rdg + 4 dgts)
±(2.0% rdg + 4 dgts)
1kHz ~ 3kHz
3kHz ~ 20kHz
±(2% rdg + 3 dgts)
Unspec’d
60.00 mV
9.999 V
600.0 mV
99.99 V
999.9 V
60.00 mV
9.999 V
600.0 mV
99.99 V
999.9 V
±(2.0% rdg + 3 dgts)
±(3.0% rdg + 4 dgts)
1)
60.00 mV
2)
9.999 V
1)
600.0 mV
99.99 V
999.9 V
3dB
3dB
0.01 mV
1 mV
0.1 mV
10 mV
100 mV
0.01 mV
1 mV
0.1 mV
10 mV
100 mV
0.01 mV
1 mV
0.1 mV
10 mV
100 mV
“KUSAM-MECO” AN ISO 9001:2015 COMPANY
-08-

“KUSAM-MECO” AN ISO 9001:2015 COMPANY
-09-
600.0 mA
60.00 mA
600.0 mA
±(0.6%rdg + 3dgts)
±(0.8%rdg + 6dgts)
±(1.0%rdg + 3dgts)
40Hz ~ 1kHz
0.08mV / mA
2.1mV / mA
0.02V / A
±(0.8%rdg + 4dgts)
1) 10A continuous, > 10A to 20A for 30 second max with 5 minutes cool down interval
AC & AC+ DC CURRENT
Range Resolution Accuracy
50Hz ~ 60Hz
6000 mA
6.000 A
1)
10.00 A
Burden Voltage
600.0 mA
60.00 mA
600.0 mA
±(0.8%rdg + 6dgts)
±(1.0%rdg + 4dgts)
0.08mV / mA
2.1mV / mA
0.02V / A
6000 mA
6.000 A
1)
10.00 A
0.1 mA
0.01 mA
0.1 mA
1 mA
0.001 A
0.01 A
0.1 mA
0.01 mA
0.1 mA
1 mA
0.001 A
0.01 A
±(0.12%rdg + 2dgts)
±(0.06%rdg + 2dgts)
±(0.08%rdg + 2dgts)
Input Impedance : 10MW, 50pF nominal
(80pF nominal for 600mV range)
DC VOLTAGE
Range Resolution Accuracy
60.00 mV
9.999 V
600.0 mV
99.99 V
999.9 V
0.01 mV
1 mV
0.1 mV
10 mV
100 mV
CAPACITANCE
Range 1)
Accuracy
60.00nF, 600.0nF
6.000mF
0.8% + 3d
1.0% + 3d
60.00mF
2)
600.0mF
2)
6.000mF
2)
25.00mF
2.0% + 3d
3.5% + 5d
5.0% + 5d
6.5% + 5d
1) Accuracies with film capacitor or better
2) In manual-ranging mode, measurements not specified below 50.0mF, 0.54mF and
5.4mF for 600.0mF, 6.000mF and 25.00mF ranges respectively.
0.08mV / mA
2.1mV / mA
0.02V / A
1) 10A continuous, > 10A to 20A for 30 second max with 5 minutes cool down interval
±(0.2% rdg + 4 dgts)
DC CURRENT
Range Resolution Accuracy Burden Voltage
600.0 mA
60.00 mA
600.0 mA
6000 mA
6.000 A
1)
10.00 A
0.1 mA
0.01 mA
0.1 mA
1 mA
0.001 A
0.01 A
“KUSAM-MECO” AN ISO 9001:2015 COMPANY
-10-

“KUSAM-MECO” AN ISO 9001:2015 COMPANY
-11-
AC 60.00mV
AC 600.0mV
AC 9.999V
AC 99.99V
AC 999.9V
AC 600.0mA
AC 6000mA
AC 60.00mA
AC 600.0mA
AC 6.000A
AC 10.00A
Accuracy : 0.04% + 4d
15.00 ~ 50.00kHz
15.00 ~ 10.00kHz
15.00 ~ 3.000kHz
40mV
60mV
2.5V
25V
100V
200mA
600mA
40mA
60mA
4A
6A
LINE LEVEL FREQUENCY (~Hz)
Function
Range Frequency Sensitivity
(sine Rms)
Open Circuit Voltage : < 1.2VDC (<1.0VDC for 60MW range)
RESISTANCE (OHMS)
Range
60.00 MW
6.000 MW
600.0 W
6.000 kW
60.00 kW
600.0 kW
Resolution Accuracy
±(0.1%rdg + 3dgts)
±(0.4%rdg + 3dgts)
±(1.5%rdg + 5dgts)
0.01 MW
0.001 MW
0.1 W
0.001 kW
0.01 kW
0.1 kW
“KUSAM-MECO” AN ISO 9001:2015 COMPANY
-12
Frequency 5.00Hz ~ 1.000MHz
Duty Cycle 0.00% ~ 100.0%
±(0.04%rdg + 4dgts)
2))
±(3d/kHz + 2d
LOGIC LEVEL FREQUENCY ( Hz) &
DUTY CYCLE (D%)
1) Sensitivity : 2.5Vp (Square wave) for 3V & 5V Logic Family
2) Specified Frequency : 5Hz ~ 10kHz
@DCmV
Function
1)
Accuracy
Range
AUDIBLE CONTINUITY TESTER
Audible threshold
Response time
Between 20W and 300W
< 100ms
Test Current (Typically) : 0.4mA
Open Circuit Voltage : < 3.5V DC
2.000V ±(1.0%rdg + 1dgts)
DIODE TESTER
Range Accuracy
Accuracy :
Specified accuracy adds 250 digits for changes > 1.0ms
in duration
CREST MODE (INSTANTANEOUS PEAK HOLD)

“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) m
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
W
V
OFF
Hz
D%nSF
KM 822EX
Intrinsically Safe TRMS DMM
AUTO
SELECT RANGE HOLD H
MAX 0.6A
HBC FUSED
T2T1
MAX
1000V CATIV
JACK
mAmAA COM WV
!
Hz
V
m
V
m
V
A
Hz
mA
Hz
100
mmAV
MkWHz
T1
T2
R C H
MAX-MIN
6
MW
kHz
D%
nmSF
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

“KUSAM-MECO” AN ISO 9001:2015 COMPANY
-16-
Normal forward voltage drop (forward biased) for a good silicon
diode is between 0.400V to 0.900V. A reading higher than that
indicates a leaky diode (defective). A zero reading indicates a
shorted diode (defective). An OL indicates an open diode
(defective). Reverse the test leads connections (reverse biased)
across the diode. The digital display shows OL if the diode is good.
Any other readings indicate the diode is resistive or shorted
(defective).
Discharge capacitors before making any measurement.
Large value capacitors should be discharged through an
appropriate resistance load.
CAPACITANCE, DIODE TEST FUNCTIONS
Press the SELECT button momentarily to select the subject
functions in sequence. Last selection will be saved as power up
default for repeat measurement convenience.
CAUTION FORWARD BIAS REVERSE BIAS
PC-Comm
MAX 10A
HBC FUSED
JACK
mA
W
V
Auto
Check
OFF
KM 822EX
AC+DC TRUE RMS DMM
SELECT RANGE
CREST C
HOLD H
RECR
EFdBm-W/T -T
1 2
MAX 0.6A
HBC FUSED
T2T1
MAX
1000V CATIV
JACK
mAmAA COM WV
!
D%
Hz
dBm
nS
V
m
V
T1
T2
m
V
A
Hz
mA
Hz
Hz
dBm
Hz
AUTO
F
n
PC-Comm PC-Comm
MAX 10A MAX 10A
HBC FUSED HBC FUSED
JACK JACK
mA mA
W W
V V
Auto
Check Auto Check
OFF OFF
KM 822EX
AC+DC TRUE RMS DMM
KM 822EX
AC+DC TRUE RMS DMM
SELECT SELECT
RANGE RANGE
CREST CREST
C C
HOLD HOLD
H H
RECRREC R
EF EFdBm dBm-W/T -T
1 2 -W/T -T 1 2
MAX 0.6A MAX 0.6A
HBC FUSED HBC FUSED
T2T2 T1T1
MAX
1000V CATIV MAX 1000V CATIV
JACK JACK
mAmA mA mAA ACOM COMWVWV
! !
D% D%
Hz
dBm Hz dBm
nS nS
V V
m
V
m
V
T1T1
T2T2
m
V
m
V
A A
Hz Hz
mAmA
Hz Hz
Hz
dBm Hz dBm
Hz Hz
AUTO
V V
1
SELECT
“KUSAM-MECO” AN ISO 9001:2015 COMPANY
-15-
CAUTION
Using resistance and continuity function in a live circuit will
produce false results & may damage the instrument. In many
cases the suspected component must be disconnected from the
circuit to obtain an accurate reading.
W Resistance, Continuity functions
Press the SELECT button momentarily to select the subject
functions in sequence. Last selection will be saved as power up
default for repeat measurement convenience.
Continuity function is convenient for checking wiring
connections and operation of switches. A continuous beep tone
indicates a complete wire.
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.
PC-Comm
MAX 10A
HBC FUSED
JACK
mA
W
V
OFF
KM 822EX
Intrinsically Safe TRMS DMM
SELECT RANGE HOLD H
EFdBm-W/T -T
1 2
MAX 0.6A
HBC FUSED
T2T1
MAX
1000V CATIV
JACK
mAmAA COM WV
!
D%
Hz
V
m
V
m
V
A
Hz
mA
Hz
Hz
Hz
AUTO
6
0
W
W
k
W
PC-Comm
MAX 10A
HBC FUSED
JACK
mA
W
V
OFF
SELECT RANGE HOLD H
EFdBm-W/T -T
1 2
MAX 0.6A
HBC FUSED
T2T1
MAX
1000V CATIV
JACK
mAmAA COM WV
!
D%
Hz
dBm
V
m
V
m
V
A
Hz
mA
Hz
Hz
dBm
Hz
60
1
W
SELECT
KM 822EX
Intrinsically Safe TRMS DMM

mA, mA AND A CURRENT FUNCTIONS
+AC
Press the SELECT button momentarily to select DC, DC ,
+AC +Hz
DC+AC & AC . Last selection will be saved as power up
default for repeat measurement convenience.
“KUSAM-MECO” AN ISO 9001:2015 COMPANY
-17-
PC-Comm
MAX 10A
HBC FUSED
JACK
mA
W
V
Auto
Check
OFF
KM 822EX
AC+DC TRUE RMS DMM
SELECT RANGE
CREST C
HOLD H
RECR
EFdBm-W/T -T
1 2
MAX 0.6A
HBC FUSED
T2T1
MAX
1000V CATIV
JACK
mAmAA COM WV
!
D%
Hz
dBm
nS
V
m
V
T1
T2
m
V
A
Hz
mA
Hz
Hz
dBm
Hz
AUTO
100
A
A
A + Hz
Hz
PC-Comm
MAX 10A
HBC FUSED
JACK
mA
W
V
Auto
Check
OFF
KM 822EX
AC+DC TRUE RMS DMM
SELECT RANGE
CREST C
HOLD H
RECR
EFdBm-W/T -T
1 2
MAX 0.6A
HBC FUSED
T2T1
MAX
1000V CATIV
JACK
mAmAA COM WV
!
D%
Hz
dBm
nS
V
m
V
T1
T2
m
V
A
Hz
mA
Hz
Hz
dBm
Hz
AUTO
100
mA + Hz
mA
mA
Hz
mA Hz
PC-Comm
MAX 10A
HBC FUSED
JACK
mA
W
V
Auto
Check
OFF
KM 822EX
AC+DC TRUE RMS DMM
SELECT RANGE
CREST C
HOLD H
RECR
EFdBm-W/T -T
1 2
MAX 0.6A
HBC FUSED
T2T1
MAX
1000V CATIV
JACK
mAmAA COM WV
!
D%
Hz
dBm
nS
V
m
V
T1
T2
m
V
A
Hz
mA
Hz
Hz
dBm
Hz
AUTO
100
mA
SELECT
1
Hz
mAmAmAmA
PC-Comm
MAX 10A
HBC FUSED
JACK
mA
W
V
Auto
Check
OFF
KM 822EX
AC+DC TRUE RMS DMM
SELECT RANGE
CREST C
HOLD H
RECR
EFdBm-W/T -T
1 2
MAX 0.6A
HBC FUSED
T2T1
MAX
1000V CATIV
JACK
mAmAA COM WV
!
D%
Hz
dBm
nS
V
m
V
T1
T2
m
V
A
Hz
mA
Hz
Hz
dBm
Hz
AUTO
100
mA
m
A
mA
PC-Comm
MAX 10A
HBC FUSED
JACK
mA
W
V
Auto
Check
OFF
KM 822EX
AC+DC TRUE RMS DMM
SELECT RANGE
CREST C
HOLD H
RECR
EFdBm-W/T -T
1 2
MAX 0.6A
HBC FUSED
T2T1
MAX
1000V CATIV
JACK
mAmAA COM WV
!
D%
Hz
dBm
nS
V
m
V
T1
T2
m
V
A
Hz
mA
Hz
Hz
dBm
Hz
AUTO
100
m
A
mA
SELECT
1
PC-Comm
MAX 10A
HBC FUSED
JACK
mA
W
V
Auto
Check
OFF
KM 822EX
AC+DC TRUE RMS DMM
SELECT RANGE
CREST C
HOLD H
RECR
EFdBm-W/T -T
1 2
MAX 0.6A
HBC FUSED
T2T1
MAX
1000V CATIV
JACK
mAmAA COM WV
!
D%
Hz
dBm
nS
V
m
V
T1
T2
m
V
A
Hz
mA
Hz
Hz
dBm
Hz
AUTO
100
m
A
SELECT
1
mAmA
“KUSAM-MECO” AN ISO 9001:2015 COMPANY
-18-
* Note : When measuring a 3-phase system, special attention
should be taken to the phase-to-phase voltage which is
significantly higher than the phase-to-earth voltage.
To avoid exceeding the voltage rating of the protection fuse(s)
accidentally, always consider the phase-to-phase voltage as the
working voltage for the protection fuse(s).
PC COMPUTER INTERFACE CAPABILITIES
The instrument equips with an optical isolated interface port at
the meter back for data communication. Optional purchase PC
USB interface kit BU-82X is required to connect the meter to the
PC computer.
Backlighted display
Press SELECT button for 1 second or more to toggle the LCD
backlight. The backlight will also be turned off automatically after
32 seconds to extend battery life.

“KUSAM-MECO” AN ISO 9001:2015 COMPANY
-19-
TM
Beep-Jack Input Warning
The meter beeps as well as displays “InEr” to warn the user
against possible damage to the meter due to improper
connections to the mA, mA or A input jacks when other function
(like voltage function) is selected.
Hold
The hold feature freezes the display for later view. Press
the HOLD button momentarily to toggle the hold feature.
Relative Zero mode
Relative zero allows the user to offset the meter consecutive
measurements with the displaying reading as the reference
value. Practically all displaying readings can be set as relative
reference value including MAX/MIN/AVG* readings. Press the
Button momentarily to toggle relative zero mode.
Manual or Auto-ranging
Press the RANGE button momentarily to select manual-ranging,
and the meter will remain in the range it was in, the LCD AUTO
turns off. Press the button momentarily again to step through the
ranges. Press and hold the button for 1 second or more to
resume auto-ranging.
Note : Manual ranging feature is not available in Hz function.
Auto-Power off (APO)
The Auto-Power-off (APO) mode turns the meter off automatically
to extend battery life after approximately 30 minutes of no
a c t i v i t i e s . A c t i v i t i e s a r e s p e c i f i e d a s :
1) Rotary switch or push button operations, and 2) Significant
measuring readings of above 512 counts or non-OL W readings.
In other words, the meter will intelligently avoid entering the APO
mode when it is under normal measurements. To wake up the
meter from APO, press the SELECT, RANGE, RELATIVE or
HOLD button momentarily or turn the rotary switch OFF and then
back on. Always turn the rotary switch to the OFF position when
the meter is not in use.
Disabling Auto-Power off
Press the SELECT button while turning the meter on to
temporarily disable the Auto-Power-Off feature. Turn the rotary
switch OFF and then back on to resume.
Set Beeper Off
Press the RANGE button while turning the meter on to
temporarily disable the Beeper feature. Turn the rotary switch
OFF and then back on to resume.
“KUSAM-MECO” AN ISO 9001:2015 COMPANY
-20-

“KUSAM-MECO” AN ISO 9001:2015 COMPANY
-21-
5) MAINTENANCE
To avoide electrical shock, disconnect the meter from any circuit,
remove the test leads from the input jacks and turn OFF the meter
before opening the case. Do not operate with open case. Install
only the same type of fuse or equivalent.
WARNING
Periodically wipe the case with a damp cloth and mild
detergent; do not use abrasives or solvents. If the meter is
not to be used for periods of longer than 60 days, remove the
battery and store it separately.
Cleaning and Storage
If the instrument fails to operate, check battery, fuses, leads, etc.,
And replace as necessary. Double check operating procedure as
described in this user’s manual.
Trouble Shooting
If the instrument voltage-resistance input terminal has subjected
to high voltage transient (caused by lightning or switching surge
to the system) by accident or abnormal conditions of operation,
the series fusible resistors will be blown off (brcome high
impedance) like fuses to protect the user and the instrument.
Most measuring functions through this terminal will then be open
circuit. The series fusible resistors and the spark gaps should
then be replaced by qualified technician. Refer to the
WARRANTY section for obtaining warranty or repairing service.
Battery and Fuse replacement
Battery use : Single 9V battery.
Fuse use :
Fuse (FS1) for mAmA current input :
0.44A/1000Vac & Vdc, IR 10kA, or better,
F fuse;
Fuse (FS2) for A current input :
11A/1000Vac & Vdc, IR 20kA, or better,
F fuse;
Battery replacement :
Loosen the 2 screws from the battery access door of the case
bottom. Lift the battery access door and thus the battery
compartment up. Replace the battery. Re-fasten the screws.
Fuse replacement :
Loosen the 4 screws from the case bottom. Lift the end of the case
bottom nearest the input jacks until it unsnaps from the case top.
Replace the blown fuse(s). Replace the case bottom, and ensure
that all the gaskets are properly seated and the two snaps on the
case top (near the LCD side) are engaged. Re -fasten the screws.
“KUSAM-MECO” AN ISO 9001:2015 COMPANY
-22-

“KUSAM-MECO” AN ISO 9001:2015 COMPANY
WARRANTY
Each “KUSAM-MECO” product is warranted to be free from defects in
material and workmanship under normal use & service. The warranty
period is one year (12 months) and begins from the date of despatch of
goods. In case any defect occurs in functioning of the instrument, under
proper use, within the warranty period, the same will be rectified by us
free of charges, provided the to and fro freight charges are borne by you.
“KUSAM-MECO” authorized dealer shall extend this warranty on new and
unused products to end-user customers only but have no authority to
extend a greater or different warranty on behalf of “KUSAM-MECO”.
“KUSAM-MECO’s” warranty obligation is limited, at option, free of charge
repair, or replacement of a defective product which is returned to a
“KUSAM-MECO” authorized service center within the warranty period.
All transaction are subject to Mumbai Jurisdiction.
THIS WARRANTY IS BUYER’S SOLE AND EXCLUSIVE REMEDY AND
IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
“KUSAM-MECO” SHALL NOT BE LIABLE FOR ANY SPECIAL,
INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR
LOSSES, INCLUDING LOSS OF DATA, ARISING FROM ANY CAUSE
WHATSOEVER.
This warranty extends only to the original buyer or end-user customer of a
“KUSAM-MECO” authorized dealer.
This warranty does not apply for damaged Ic’s, fuses, disposable
batteries, carrying case, test leads, or to any product which in “KUSAM-
MECO’s” opinion, has been misused, altered, neglected, contaminated or
damaged by accident or abnormal conditions of operation or handling.
-24-
“KUSAM-MECO” AN ISO 9001:2015 COMPANY
MUMBAI
TEST CERTIFICATE
DIGITAL MULTIMETER
This Test Certificate Warranties that the product has been
inspected and tested in accordance with the published
specifications.
The instrument has been calibrated by using equipment
which has already been calibrated to standards traceable
to national standards.
MODEL NO. ________________
KM 822EX
SERIAL NO. ___________
DATE: ___________
ISO 9001
REGISTERED
QC
PASS
KUSAM-MECO
-23-