Kusam-meco KM 1320 User manual

An ISO 9001:2008 Company
®
All Specifications are subject to change without prior notice
D:\Chhaya\My Documents\Chhaya\backup\catlog\New Cat\KM 1320-3000B.cdr
Earth Resistance Soil Resistivity Tester
2 / 3 / 4 Wire Model KM 1320
?Function : Measurement of 2/3/4-pole earth resistance, soil resistivity, earth voltage, AC voltage
?Measurement Range : Earth Resistance: 0.00Ω-30.00kΩ
Soil Resistivity: 0.00Ω-9000kΩ
?Measuring Mode : Precise 4-pole measurement, 3-pole measurement, simple 2-pole measurement
?Measuring Method : Earth Resistance: rated current change-pole method, measurement current 20mA Max
Soil Resistivity: 4-pole measurement
Earth Voltage: average rectification(between P(S)-ES)
?Test Frequency : 128Hz/111Hz/105Hz/94Hz(AFC)
?Short-circuit Test Current : AC 20mA max
?Open-circuit Test Current : AC 40V max
?Test Voltage Wave : Sine wave
?Electrode Distance Range: Can be set 1m-100m
?Shift : Earth Resistance: 0.00Ω-30.00kΩ,automatic shift
Soil Resistivity: 0.00Ω-9000kΩ, automatic shift
?Backlight : Blue screen backlight, suitable for dim places
?Display Mode : 4-digital super-large LCD display, blue screen backlight
?Measuring Indicator : During measurement, LED flash indicator, LCD count down display, progress bar indicator
?LCD Frame Dimension : 128mm×75mm
?LCD Window Dimension : 124mm×67mm
?Standard Test Wire : 4 wires: each for red 20m, black 20m, yellow 10m, and green 10m
?Simple Test Wire : 2 wires: each for red 1.6m and black 1.6m
?Auxiliary Earthing Rod : 4 rods: Φ10mm×150mm
?Measuring Rate : Earth voltage: about 3 times/second
Earth resistance, soil resistivity: about 5 seconds/time
?Line Voltage : below AC 600V
KM 1320 Earth Resistance Soil Resistivity Tester is specially
designed and manufactured for measuring earth resistance, soil
resistivity, earth voltage, AC voltage. Adopting the latest digital
and micro-processing technology, precise 4-pole, 3-pole and
simple 2-pole method for earth resistance measurement,
importing FFT and AFC technology, with a unique function of
anti-interference capability and the ability to adapt to the
environment, consistency of repeat testing, to ensure high
precision, high stability and reliability for prolonged measure,
which is widely used in electric power, telecommunications,
meteorology, oil field, construction, lightning protection,
industrial electrical equipment and other earth resistance, soil
resistivity, earth voltage, AC voltage measurement.
KM 1320 Earth Resistance Soil Resistivity Tester is composed
of host machine, monitoring software, testing wires, auxiliary
ground pillars, communication wires and others. The large LCD
display of host machine is with blue backlight & bar graph
indicating that can be seen clearly. At the same time it can
store 300 sets of data, fulfilling historical inquiry and online real-
time monitoring through monitoring software, dynamic display,
alarm indicator, and with the functions like historical data
access, reading, preservation, report forms, printing and so on.
GENERAL SPECIFICATIONS :

All Specifications are subject to change without prior notice
D:\Chhaya\My Documents\Chhaya\backup\catlog\New Cat\KM 1320-3000B.cdr
?Measuring Times : Over 5000 times (Short-circuit test, interval time should be at least 30 seconds)
?RS232 Interface : RS232 interface, software supervision, storage data can be uploaded to
computer, saved or printed.
?Communication Wire : One piece of RS232 communication wire, with length 1.5m
?Data Storage : 300 sets, “MEM” icon storage indicator, flash display “FULL” icon to indicate storage is full
?Data Hold : Data hold function: “HOLD” icon display
?Data Access : Data read function: “READ” icon display
?Overflow Display : Exceeding measuring range overflow function: “OL” icon display
?Interference Test : Recognize interference signal automatically, “NOISE” icon display when interference
voltage exceed 5V
?Auxiliary Earthing Test : Can measure auxiliary earth resistance, 0.00KΩ-30kΩ(100R+rC<50kΩ, 100R+rP<50kΩ)
?Operating Temperature & Humidity : -10?-40?, below 80%rh
?Storage temperature & humidity : -20?-60?, below 70%rh
?Alarm Function : When measuring value exceeds alarm setting value, there is alarm Sound
?Battery Voltage : When battery voltage decreases to about 7.5V, battery voltage low icon will display,
reminding to replace battery.
?Overload Protection : Measuring earth resistance: between each interfaces of C(H)-E、P(S)-ES,
AC 280V/3 seconds
?Insulation Resistance : Over 20MΩ (between circuit and enclosure it is 500V)
?Withstanding Voltage : AC 3700V/rms (Between circuit and enclosure)
?Electromagnetic Features : IEC61326(EMC)
?Protection Type : IEC61010-1 (CAT Ⅲ 300V、CAT IV 150V、Pollution 2), IEC61010-031, IEC61557-1
(Earth resistance), IEC61557-5 (Soil resistivity), JJG 366-2004
?Power Consumption : Standby: about 20mA (Backlight shut off)
Boot and with backlight: about 45mA (25mA without backlight)
Measurement: about 100mA (Backlight shut off)
?Power Supply : DC 9V(Zi-Mn dry battery R14S 1.5V 6 PCS, continuous standby for 300 hours )
?Weight : 4.5kg (including package)
?Dimension : 215(L)×190(W)×95(H)mm
?Accessories : Standard testing wire 4nos., Simple testing wire 2nos., earth rods 4pcs., Battery, Manual
Software CD, RS232 Communication cable & Carrying case.
ELECTRICAL SPECIFICATIONS :
a＞20h a＞20h
1. Base Conditions and Working Conditions
Influence Quantity Working Conditions
Base Condition
Ambient Temp 23°C±1°C
Ambient Humidity 40%-60%
Working Voltage 9V±0.1V 9V±1.5V
＜80%
-10°C-40°C
Auxiliary Earth Resistance ＜100Ω ＜30kΩ
Interference Voltage no ＜20V
Interference Current no ＜2A
Electrode Distance
when measuring R a＞5d a＞5d
Electrode Distance
when measuring ρ

G-17, Bharat Industrial Estate, T. J. Road, Sewree (W), Mumbai - 400 015. INDIA.
Sales Direct.: 022 -2 4156638, Tel. : [phone], Fax : 022 - 24149659
Email : [email protected], Website : www.kusamelectrical.com,
All Specifications are subject to change without prior notice
D:\Chhaya\My Documents\Chhaya\backup\catlog\New Cat\KM 1320-3000B.cdr
An ISO 9001:2008 Company
®
Intrinsic Error Resolution
Measurement Range
3. Intrinsic error and performance indicators under base conditions
Category
0.00Ω-30.00Ω ±2%rdg ± 3dgt 0.01Ω
30.0Ω-300.0Ω ±2%rdg ± 3dgt 0.1Ω
300Ω-3000Ω ±2%rdg ± 3dgt 1Ω
3.00kΩ-30.00kΩ±4%rdg ± 3dgt 10Ω
Soil Resistivity (ρ)
0.00Ω-99.99Ω
According to the precision of
R
(ρ=2πaR
a:1 m-100m,
π=3.14)
0.01Ω
100.0Ω-999.9Ω0.1Ω
1000Ω-9999Ω1Ω
10.00kΩ-99.99kΩ10Ω
100.0kΩ-999.9kΩ100Ω
1000kΩ-9000kΩ1kΩ
Earth Voltage AC 0.0-600V ±2%rdg ± 3dgt 0.1V
Earth Resistance(R)
4. Field Application

G 17, Bharat Industrial Estate, T. J. Road,
Sewree (W), Mumbai - 400 015. INDIA.
Sales Direct : [phone]
Tel. : [phone]. Fax : [phone]
Email : [email protected]
Website : www.kusamelectrical.com
www.kusam-meco.co.in
®MODEL - KM 1320
OPERATION MANUAL
®®
AN ISO 9001:2008 COMPANY
EARTH RESISTANCE
SOIL RESISTIVITY
TESTER

® ®
EARTH RESISTANCE
SOIL RESISTIVITY TESTER
MODEL - KM 1320
CONTENT
Warning.............................................................................
I. Introduction...............................................................
II. Technical Specifications..........................................
1. Base Conditions and Working Conditions.............
2. General Specification............................................
3. Intrinsic error and performance indicators under
base conditions......................................................
III. Tester Structure........................................................
IV. LCD Display..............................................................
V. Measuring Principle..................................................
VI. Operation Methods...................................................
1. Switch On/Off.........................................................
2. Battery Voltage Check...........................................
3. AC Voltage Measurement......................................
4. Earth Voltage Measurement..................................
5. 4-wires Precise Earth Resistance Measurement...
6. 3-Wires Earth Resistance Measurement...............
7. 2-Wires Simple Measurement................................
8. Soil Resistivity Measurement.................................
9. Backlight Control....................................................
10. Alarm Settings......................................................
11. Data Lock/Storage................................................
12. Data Reading/Deletion.........................................
13. Data Upload.........................................................
VII. Battery Replacement................................................
VIII. Accessories...............................................................
IX. Test Certificate..........................................................
X. Warranty....................................................................
1
3
4
4
4
6
7
8
9
10
10
10
10
11
12
13
14
15
17
17
17
17
18
18
19
20
21
®® KM 1320 EARTH- TESTERr
(2/3/4 WIRES)

01
® ®
02
Thanks for you purchase of KM 1320 Earth
Resistance Soil Resistivity Tester of our company. For better
use of the product, please make sure:
®®
WARNING
––to read this user manual in details.
––to abide by the safety regulations and precautions strictly.
The tester is conforming to IEC61010 on design, production and
test.
Under any circumstance, it shall pay special attention on safety
in use of this tester.
Pay attention to words and symbols stick on the Tester.
It shall make sure that tester and accessories are in good
condition before use; it can be used only when there is no
damaged, naked or broken part in testing wires or insulation
layer.
During measurement, it is forbidden to touch bare conductors
and circuit under measurement.
Before measurement, please confirm whether rotary
switch has been set within the proper measuring range.
Confirm that connector plug of lead has been inserted in the
tester interface closely.
Please don’t impose over 600V A.C. or D.C. voltage on the part
between testing end and interface. Otherwise, it may have
damage on the tester.
Please don’t measure in an inflammable place. The flame
sparkle maybe cause explosion.
u
u
u
u
u
u
u
u
u
FUNCTION
During usage of tester, please stop using it when exposed metal
is caused by broken enclosure or testing wires.
Please don’t keep or store the tester in the spot with high-
temperature and moisture, or condensation, and under direct
daylight radiation for a long time.
If the instrument is damp, please dry it before keeping.
For replacing battery, please confirm testing wire has moved
apart the meter, and rotary switch is in “OFF” position.
Please put the used batteries in appointed collection place.
The Tester has no auto shut-off function. Please set
rotary switch to “OFF” after usage.
When the meter displays battery low voltage symbol , and
you need to replace the battery in time.
If the Tester is not going to be used for a long period, remove the
battery.
Pay attention to measuring range and usage environment
stipulated for the Tester.
This measuring device is only to be used, disassembled,
adjusted and repaired by qualified personnel with authorization.
When it may cause hazard by continuous use for the reason of
the Tester itself, it shall immediately stop using it and deposit it
at once, leaving it for disposal by authorized agency.
For risk of danger icon in manual “ ”, users must perform safety
operations strictly in compliance with the manual content.
u
FUNCTION
FUNCTION
u
u
u
u
u
u
u
u
u
u
u

03
® ®
04
I. INTRODUCTION :
-3-
KM 1320 Earth Resistance Soil Resistivity
Tester is specially designed and manufactured for measuring
earth resistance, soil resistivity, earth voltage, AC voltage.
Adopting the latest digital and micro-processing technology,
precise 4-pole, 3-pole and simple 2-pole method for earth
resistance measurement, importing FFT and AFC technology, with
a unique function of anti-interference capability and the ability to
adapt to the environment, consistency of repeat testing, to ensure
high precision, high stability and reliability for prolonged measure,
which is widely used in electric power, telecommunications,
meteorology, oil field, construction, lightning protection, industrial
electrical equipment and other earth resistance, soil resistivity,
earth voltage, AC voltage measurement.
®®
KM 1320 Earth Resistance Soil Resistivity
Tester is composed of host machine, monitoring software, testing
wires, auxiliary ground pillars, communication wires and others.
The large LCD display of host machine is with blue backlight and
bar graph indicating that can be seen clearly. At the same time it
can store 300 sets of data, fulfilling historical inquiry and online
real-time monitoring through monitoring software, dynamic display,
alarm indicator, and with the functions like historical data access,
reading, preservation, report forms, printing and so on.
®®
KM 1320 Earth Resistance Soil Resistivity
Tester also named : Precise Earth Resistance Tester, 4-pole Earth
Resistance Tester, 2/3/4-pole Earth Resistance Tester, Soil
Resistivity Tester.
®®
II. TECHNICAL SPECIFICATIONS :
1. Base Conditions and Working Conditions :
Influence Quantity Base
Condition
Working
Condition Remark
Ambient Temp
Ambient Humidity
Working Voltage
Auxiliary Earth Resistance
Interference Voltage
Interference Current
Electrode Distance when
measuring R
Electrode Distance when
measuring P
23ºC ± 1ºC
40%-60%
9V ± 0.1V
<100W
no
no
a>5d
a>20h
-10ºC-40ºC
<80%
9V ± 1.5V
<30W
<20V
<2A
a>5d
a>20h
----
----
rC, rP
----
----
----
----
2. GENERAL SPECIFICATION :
Function
Power Supply
Measurement Range
Measuring Mode
Measuring Method
Test Frequency
Short-cicuit Test Current
Open-circuit Test Current
Test Voltage Wave
Electrode Distance Range
Measurement of 2/3/4-pole earth resistance, soil
resistivity, earth voltage, AC voltage
DC 9V (Zi-Mn dry battery R14S 1.5V 6 PCS,
continuous standby for 300 hours)
Earth Resistance : 0.00W-30.00kW
Soil Resistivity : 0.00Wm-9000kWm
Precise 4-pole measurement, 3-pole measurement,
simple 2-pole measurement
Earth Resistance : rated current change-pole method,
measurement current 20mA Max
Soil Resistivity : 4-pole measurement (Wenner method)
Earth Voltage : average rectification (between P(s)-ES)
128Hz/ 111Hz/ 105Hz/ 94Hz (AFC)
AC 20mA max
AC 40V max
Sine wave
Can be set 1m-100m

05
® ®
06
Earth Resistance : 0.00W-30.00kW, automatic shift
Soil Resistivity : 0.00Wm-9000kWm, automatic shift
Blue screen backlight, suitable for dim places
4-digital super-large LCD display, blue screen backlight
During measurement, LED flash indicator, LCD count
down display, progress bar indicator
´
128mm 75mm
´
124mm 67mm
L ´W ´H : 215mm ´190mm ´95mm
4 wires : each for red 20m, black 20m, yellow 10m, and
green 10m
2 wires : each for red 1.6m and black 1.6m
´
4 rods : F10mm 150mm
Earth voltage : about 3 times/ second
Earth resistance, soil resistivity : about 5 seconds/ time
Over 5000 times (Short-circuit test, interval time should
be at least 30 seconds)
below AC 600V
Possess Rs232interface, software supervision, storage
data can be uploaded to computer, saved or printed.
One piece of Rs232 communication wire, with length
1.5m
300 sets, “ ” icon storage indicator, flash display
“ ” icon to indicate storage is full
Data hold function : “ ” icon display
Data read function : “ ” icon display
Exceeding measuring range overflow function : “ ”
icon display
Recognize interference signal automatically, “ ”
icon display when interference voltage exceed 5V
Can measure auxiliary earth resistance, 0.00kW-30kW
(100R+ rC<50kW, 100R+ rP<50kW)
When measuring value exceeds alarm setting value,
there is “Toot-toot-toot” alarm hint
Shift
Backlight
Display Mode
Measuring Indicator
LCD Frame Dimension
LCD Window Dimension
Dimension
Standard Test Wire
Simple Test Wire
Auxiliary Earthing Rod
Measuring Rate
Measuring Times
Line Voltage
RS 232 Interface
Communication Wire
Data Storage
Data Hold
Data Access
Overflow Display
Interference Test
Auxiliary Earthing Test
Alarm Function
MEM
FULL
HOLD
READ
OL
NOISE
Battery Voltage
Power Consumption
Weight
Working Temperature &
Humidity
Storage Temperature &
Humidity
Overload Protection
Insulation Resistance
Withstanding Voltage
Electromagnetic
Features
Protection Type
When battery voltage decreases to about 7.5V, battery
voltage low icon will display, reminding to replace
battery.
Standby : about 20mA (Backlight shut off)
Boot and with backlight about 45mA (25mA without
backlight)
Measurement : about 100mA (Backlight shut off)
Total weight : 4.5kg (including package)
Tester : 1443g (including battery)
Testing wires : 1560g
Auxiliary earthing rods : 935g (4pcs)
-10ºC-40ºC, below 80%rh
-20ºC-60ºC, below 70%rh
Measuring earth resistance : between each interfaces
of C(H)-E, P(S)-ES, AC 280V/3 seconds
Over 20MW(between circuit and enclosure it is 500V)
AC 3700V/rms (Between circuit and enclosure)
IEC61326 (EMC
IEC61010-1 (CAT III 300V, CAT IV 150V, Pollution 2),
IEC61010-031, IEC61557-1 (Earth resistance),
IEC61557-5 (Soil resistivity), JJG 366-2004
– +

07
® ®
08
3. Intrinsic error and performance indicators under base
conditions
Category Measurement Range Intrinsic Error Resolution
Earth
Resistance
(R)
Soil Resistivity
(r)
Earth Voltage
0.00W-30.00kW
30.0W-300.0kW
300W-3000kW
3.00W-30.00kW
0.00W-99.99kW
100.0W-999.9kW
10000W-9999kW
10.00W-99.99kW
100.0W-999.9kW
1000W-9000kW
AC 0.0-600V
±2%rdg ± 3 dgt
±2%rdg ± 3 dgt
±2%rdg ± 3 dgt
±4%rdg ± 3 dgt
According to
the precision of
R
(r= 2paR
a : 1 m-100m,
p= 3.14)
± 2%rdg ± 3 dgt
0.01W
0.1W
1W
10W
0.01Wm
0.1Wm
1Wm
10Wm
100Wm
1kWm
0.1V
Note :
1. When rC max or rP max, additional error <± 3%rdg ± 5 dgt.
(rC max : 4kW+ 100R<50kW, rP max : 4kW+ 100R <50kW)
2. When 5V interference voltage, additional error <± 5%rdg ± 5dgt.
III. TESTER STRUCTURE :
C
(H)
E
P
ES
(S)
AC 600V Max
Rs232
6
7
8
4
9
10 11 12
H.i65
000
EARTH- TESTER
(2/3/4 WIRES)
0
10 20 30
40
.
C
MEM
AL CLR
SET
START
FUNCTION
OFF
EARTH
R
EARTH
EARTH
VOLTAGE
OFF
C
(H)
E
P
ES
(S)
AC600V Max
Rs232
45
3
2
1

09
® ®
10
1. LCD 2. Button area
3. Rotary switch for selecting function 4. RS232 interface
5. Interface of testing wires 6. P(S) interface: Voltage electrode
7. C(H) interface: Current electrode 8. E interface: Earth electrode
9. ES interface: Auxiliary earth electrode 10. Standard test wires
11. Auxiliary earthing rods 12. Simple test wires
1. Progress bar (Dynamic display the progress of testing)
2. Alarm symbol (Display when open alarm function, flash when
exceed the alarm value)
3. Exceed voltage symbol (Display when the measured voltage
exceed 30V, please pay attention to the safety)
4. AC symbol
5. Data hold symbol (Display when press to hod data)
6. Data access symbol (Display when long press for at least
least 3 seconds to access data)
7. Data storage symbol (Display when press to hold data
and store)
8. Interference signal symbol (Display when the interference
voltage exceed 5V)
9. Low battery symbol (Display when the battery voltage decreases
to 7.5V)
MEM
MEM
MEM
10. Display the group number of stored data, and display
countdown.
11. Interference electrode symbol (Display when the electrode
exceed 5V interference voltage)
12. Measured data
13. Voltage unit symbol
14. Resistance, soil resistivity, length unit symbol (W, k , m,
kWm, m)
WW
V. MEASURING PRINCIPLE :
1. Voltage to ground measurement adopts average value
rectification method.
2. Earth resistance measurement with fall-of-potential method. AC
constant current Iis applied between the measurement object E
earth electrode and C(H) current electrode, and finding out the
potential difference Vbetween Eearth electrode and P(S)
voltage electrode, calculating the earth ground R according to
formula R = V/I. To ensure the accuracy of test, designed the
4-wires method can eliminate influence of contact resistance
(usually result from dirty or rusty) between measured earthing
body, auxiliary earthing rods, test clips, meter’s input interface.
The 4-wires method can also eliminate influence of line
resistance.
Rated current generator
A
~
VVoltmeter
Voltage electrode
P(S)
Current electrode
C(H)
V=R I´
R=V/I
I
E Earth eelctrode
IV. LCD DISPLAY :
H888
8888
10 20 30
40
0
. . .
.
AC
H S
HOLD V
k m
READ
MEM
NOISE
1
2
3
4
5
6
7
8
9
10
11
12
13
14

®
12
11
®
3. Maximum Operating Error : Operating error (B) is an error
obtained within the rated operating conditions, and calculated
with the intrinsic error (A), which is an error of the instrument
used, and the error (E) due to variations.
A : Intrinsic error
E2 : Variation due to power supply voltage
E3 : Variation due to temperature change
E4 : Variation due to interference voltage change
E5 : Variation due to contact electrode resistance
B = ± ( |A| + 1.15 E + E + E + E )
2 3 4 5
´2 2 2 2
4. Soil resistivity ( ) is measured by 4-pole method (Wenner
method) : There is a AC current Ibetween Eearthing electrode
and C(H) current electrode, find the potential difference V
between P(S) voltage electrode and ES auxiliary earthing
electrode, the potential difference Vdivided by AC current Iis
earth resistance R, electrode distance is a(m), then soil
resistivity can be got according to formula r=2paR(Wm). If the
electrode distance of C(H)-P(S) is equal to P(S)-ES (both is a)
that is for wenner method. In order to simple the calculation,
please make electrode distance a far more than embedding
depth h, generally should meet a>20h, as shown below.
r
Rated current generator
A
~
V
Voltmeter
P(S)ESE
a a a
h
>20h >20h >20h
a/20h max
I
VI. OPERATION METHODS :
1. Switch On/Off :
Rotate rotary switch to fulfill switch on and off. When
rotary switch button displays “OFF” for shut-off. The Tester has no
auto shut-off function, so please shut it off after usage in case of
battery consumption saving.
FUNCTION
2. Battery Voltage Check :
After switch on, if LCD displays low battery voltage icon “ ”,
which indicates that battery voltage is low, and please replace the
battery in compliance with instructions. Adequate battery power
can ensure the accuracy of measurement.
– +
3. AC Voltage Measurement :
AC voltage measurement refers to the general commercial AC
voltage measurement, pay attention to the difference between
earthing voltage, the meter can be used for testing below 600V AC
line voltage.
As shown below. Firstly connect test wires with P(S), ES
interface, secondly connect test wires with tested line, then rotate
rotary switch to “EARTH VOLTAGE” and start testing,
LCD will display the test results.
FUNCTION
Ac line voltage measurement can’t exceed 600V.
Connect P(S) and ES interface to test commercial AC
voltage, no need to connect C(H) and E interface.

13
® ®
14
H.i55
I i0
EARTH- TESTER
0
10 20 30
40
C
MEM
AL CLR
SET
START
FUNCTION
OFF
EARTH
R
EARTH
EARTH
VOLTAGE
OFF
C
(H)
E
P
ES
(S)
AC600VMax
Rs232
V
P(S)
ES
ES P(S)
Green Yellow
N L
4. Earth Voltage Measurement :
Earth voltage measurement need to use one auxiliary
earthing rod.
The meter connect with the earth only by testing wires
and auxiliary earthing rods. Other tester wires of
meter’s interface can’t connect with commercial
power line L, N, otherwise may cause leakage, the
breaker may start, it is dangerous.
Earth voltage measurement can’t exceed 600V.
Earth voltage : That is a potential differences between zero
potential differences and earthing equipment shell, earthing wires,
earthing body when electrical equipment has a earthing fault.
Earth voltage is the potential differences between the earth. As a
reference point, the earth is zero potential.
Earth voltage measurement need to use one auxiliary earthing
rod. Please pay attention to the difference from commercial AC
voltage measurement. As shown below : meter, auxiliary earthing
rods, testing wires are all connected, rotate rotary
switch to “EARTH VOLTAGE” and start testing, LCD will display
the test results.
FUNCTION
H.i65
07 i
EARTH- TESTER
0
10 20 30
40
C
MEM
AL CLR
SET
START
FUNCTION
OFF
EARTH
R
EARTH
EARTH
VOLTAGE
OFF
C
(H)
E
P
ES
(S)
AC600VMax
Rs232
V
P(S)
ES
ES
P(S)
Green
Yellow
.
Secondary
circuit
Transformer
First
circuit
Measured earthing body
Measuring earth voltage of commercial earthing body
5. 4-wires Precise Earth Resistance Measurement :
In the testing of earth resistance, should firstly confirm
the earth voltage of earthing wire, the voltage between
C(H) and E or P(S) and ES must under 20V, the meter
showing symbols when the earth voltage exceed
5V, and the measured value of earth resistance may
produce error. At this time, firstly interrupt power
supply to earthing equipment, make sure the earth
voltage decrease, and then test earth resistance again.
NOISE
4-wires Measurement : The 4-wires method can eliminate
influence of contact resistance (usually result from dirty or rusty)
between measured earthing body, auxiliary earthing rods, test
clips, meter’s input interface. The 4-wires method can also
eliminate influence of line resistance. So it is better than 3-wires
measurement.
As shown below : Start from the measured body, interval 5m-
20m, respectively insert P(S), C(H) auxiliary earthing rods deep into
the earth in a straight line, and then connect testing wires (black,
green, yellow, red) from E, ES, P(S), C(H) interfaces corresponding
to measured earth electrode E, auxiliary voltage electrode P(S),
auxiliary current electrode C(H).

15
® ®
16
The distance from measured earthing body to current
electrode C(H), should at least five times longer than
the embedded depth of measured earthing body, or
the embedded electrode depth (d).
When measuring the total earth resistance of complex
earthing system, d is the length of the biggest
diagonal line of this earthing system.
Testing wires can’t be winded together, or may affect
the measuring accuracy.
H.i65
07 i
EARTH- TESTER
0
10 20 30
40
C
MEM
AL CLR
SET
START
FUNCTION
OFF
EARTH
R
EARTH
EARTH
VOLTAGE
OFF
C
(H)
E
P
ES
(S)
AC600VMax
Rs232
E
ES
P(S)
Green
Yellow
.
Measured earthing body
Red
C(H)
Black
h
d
>5d
For multi independent earthing system or larger earth net, 50m or
larger testing wire is optional, as shown below :
H.i65
i00
EARTH- TESTER
0
10 20 30
40
C
MEM
AL CLR
SET
START
FUNCTION
OFF
EARTH
R
EARTH
EARTH
VOLTAGE
OFF
C
(H)
E
P
ES
(S)
AC600VMax
Rs232
.
ES
Green
Black
>5d
C(H) P(S)
Red Yellow
E
rC rP
r1
r2
r3 r4 r5 r6
d
R = r1//r2//r3//r4//r5//r6//....//rn (r1....rn are all independent
earthing points)
R–– The reading value on meter, the total earth resistance of the
earthing system.
r1...rn–– All are independent earthing points, each points have
no connection together under the ground.
rC–– The earth resistance rC of auxiliary current electrode C(H).
rP–– The earth resistance rP of auxiliary voltage electrode P(s).
n–– Number of independent earthing point, more points, smaller
the Rvalue.
After finishing wires connection, firstly rotate rotary
switch to “REARTH”, press “ ” button to start testing. During
testing, display countdown and process bar indicator. Stable earth
resistance value is shown when finish testing.
FUNCTION
START
Press “ ” button, the earth resistance rC of auxiliary current
electrode C(H) and earth resistance rP of auxiliary voltage electrode
P(S) will be displayed, and then automatically return display of
measured earth resistance R.
SET
As shown below, the measured earth resistance is 2.05 ,
already stored 8 sets of data. The earth resistance rC of auxiliary
current electrode C(H) is 0.36K , the earth resistance rP of
auxiliary voltage electrode P(S) is 0.27KW.
W
W
H008
205
10 20 30
40
0
.
.
036
.
c:
k
027
.
p:
k

17
® ®
18
6. 3-Wires Earth Resistance Measurement :
3-wires measurement : As shown below, short-circuit ES and S
interface, which is 3-wires measurement. The operation of meter is
the same with 4-wires measurement. The 3-wires method can’t
eliminate influence of line resistance, also can’t eliminate influence
of contact resistance between meter and testing wires, testing
wires and auxiliary earthing rods. Meanwhile, oxidation layer on
measured earthing body must be removed when measuring.
H.i65
07 i
EARTH- TESTER
0
10 20 30
40
C
MEM
AL CLR
SET
START
FUNCTION
OFF
EARTH
R
EARTH
EARTH
VOLTAGE
OFF
C
(H)
E
P
ES
(S)
AC600VMax
Rs232
ES-E
P(S)
Yellow
.
Measured earthing body
Red
C(H)
Black
d
>5d
ES-E
>5d
7. 2-Wires Simple Measurement :
When select commercial use power supply system
earth as auxiliary earth electrode, it must use detector
to confirm that is it the earth ground electrode for
commercial use power supply system, otherwise the
breaker may start, it is dangerous.
Using 2-wires simple method for measuring earth
resistance, try to choose a earthing body which has a
small re value as auxiliary earthing electrode, so that
the reading value is more close to the real value. The
metal pipes, metal fire hydrant have priority in
choosing auxiliary earthing electrodes.
2-wires method : This method is a simple method for
measurement that does not use auxiliary earthing rod, taking the
earth electrode with the minimal existing earth ground resistance
value as auxiliary earth electrode, and connecting by two simple
testing wires (in which C(H)-P(S),E-ES interfaces are in short circuit).
It can make use of metal pipes, fire hydrants and other metal buried
objects, common earthing of commercial electric power system or
lightning protection earth ground electrode and others to replace
auxiliary earthing rods C(H), P(S), and pay attention to remove oxide
layer on the connection point of the selected metal auxiliary earthing
object when making measurement.
Wire connection is as following figure, and refer to 4-wires
measurement for other operations.
000
EARTH- TESTER
0
10 20 30
40
C
MEM
AL CLR
SET
START
FUNCTION
OFF
EARTH
R
EARTH
EARTH
VOLTAGE
OFF
C
(H)
E
P
ES
(S)
AC600VMax
Rs232
E-ES
C(H)-P(S)
Red
Black
.
C(H)-P(S)
E-ES
RX
Measured earthing body
Take metal pipe or building lighting proof earth as the auxiliary earth electrodes
000
EARTH- TESTER
0
10 20 30
40
C
MEM
AL CLR
SET
START
FUNCTION
OFF
EARTH
R
EARTH
EARTH
VOLTAGE
OFF
C
(H)
E
P
ES
(S)
AC600VMax
Rs232
E-ES
C(H)-P(S)
Red
Black
.
Secondary
circuit
Transformer
First
circuit
Commercial earthing body
Measured
earthing body
C(H)-P(S)
E-ES
RX re

19
® ®
20
2-wires simple method for measurement of earth ground
resistance, its reading on tester is the total value of earth ground
resistance value of measured earthing object and that of
commercial earthing object, that is : R = RX + re
In which :
Ris the tester reading value;
RX is the earth ground resistance value of measured earthing
object;
re is the earth ground resistance value of common earthing
object like commercial use power system.
Then, the earth ground resistance value of measured earthing
object is : RX = R – re
8. Soil Resistivity Measurement :
Soil resistivity ñis a determining factor of earthing resistance of
earthing body. Different nature of the soil, there is a different soil
resistivity. Even the same kind of soil, due to different temperature
and water content and so on, the soil resistivity will correspondingly
have a significant change. Therefore, in order to have a correct
basis in the design of the earthing device, ensure the designed
earthing device be more in accord with the need of practical work,
soil resistivity measurement is very essential.
Soil resistivity is measured by 4-pole method (Wenner method)
According to formula ñ=2ðaR(Ùm) calculating soil resistivity ñ,
its unit is Ùm, in which :
a––electrode distance
R––soil resistivity between electrode P(S)-ES
4-pole method (Wenner method) : Connect testing wires as
shown below, pay attention to the distance between auxiliary
earthing rods, and the embedding depth. Respectively insert C(H),
P(S), ES, Eauxiliary earthing rods deep into the earth in a straight
line, and then connect testing wires (red, yellow, green, black)
corresponding to C(H), P(S), ES, Eof interfaces and measured
auxiliary earthing rods.
E
ES
P(S)
Green
Yellow
Red
C(H)
Black
a
>20h
h
H.i65
000
EARTH- TESTER
0
10 20 30
40
C
MEM
AL CLR
SET
START
FUNCTION
OFF
EARTH
R
EARTH
EARTH
VOLTAGE
OFF
C
(H)
E
P
ES
(S)
AC600VMax
Rs232
.
m
a
>20h a >20h
a/20 max
Setting distance between auxiliary earthing rods : After finishing
wires connection, firstly rotate rotary switch to ‘“ñEARTH”,
long press “ ” button (about 3 seconds) to enter setting, short
press “ ” button to move the cursor, press “ ” or “ ” button
to change current data value (a range:1m-100m), then long press
“ ” button to save the set a value, and return soil resistivity
testing mode.
FUNCTION
SET
SET
SET
After setting a value, in soil resistivity testing mode, press the
“ ” button to start testing, and countdown display testing
process, stable soil resistivity value is shown when finish testing.
START
SET
As shown below, the measured soil resistivity is 53.38Ùm, already
stored 157 sets of data. Press “ ” button, the earth resistance rC of
auxiliary current electrode C(H) and earth resistance rP of auxiliary
voltage electrode P(S) will be displayed, and then automatically return
display of measured soil resistivity ñ.
H i57
5338
10 20 30
40
0
.
.
m
036
.
c:
k
027
.
p:
k

21
® ®
22
9. Backlight Control :
After startup, press “ ” button to turn on or off backlight. The
backlight function is suitable to dark spot, power consumption of
backlight is about 25mA. It will default backlight turn-off for each
startup.
¤
10. Alarm Settings :
After startup, rotate rotary switch to select function,
press “ ” button for a brief time to open or shut off alarm
function, press “ ” button for a long time (about 3 seconds) to
enter alarm critical value settings, press “ ” or “ ” to change
current digital, press “ ” button to move cursor and then press
“ ” button to store and exit. When measurement value is larger
than alarm critical settings value and it has opened alarm function,
the tester will flash and display “ ” icon and give out “toot-toot-
toot--” alarming sound.
FUNCTION
AL
AL
AI
AI
11. Data Lock / Storage :
In test mode, press “ ” button for a brief time to lock
current displayed data, showing “ ”, “ ” icon and
automatically store with serial numbers. If storage is full, the tester
will display “ ” icon, and then press button to remove lock.
MEM
HOLD MEM
FULL
As shown in the left figure below:The lock measurement data
of soil resistivity is 53.38Ùm, as the 28th group of data storage.
––––
––––
HOLD
READ
H028
5338
10 20 30
40
0
.
.
m
HOLD
MEM
12. Data Reading / Deletion :
In test mode, press “ ” button for a longer time (over 3
seconds) to enter data reading, press “ ” or “ ” button to select
reading data group number by step value 1, press “ ” or “ ”
button constantly to select reading data group number by step
value 10. When the current data is earth resistance or soil
resistivity, press “ ” button to read data value of rC, rP and a,
then press “ ” button to exit from reading.
MEM
SET
MEM
On reading if there is no storage data, LCD will display “ ”,
see the above right figure.
- - - -
Under data reading status, press “ ” button to enter data
deletion, press “ ” or “ ” to select “ ” or “ ”, selecting
“ ” and then pressing “ ” button for not deleting and return
data reading status, selecting “ ” and then pressing “ ”
button for deleting stored data and it will show as above right figure
after deletion.
CLR
no yES
no
yES
CLR
CLR
Notice : Operating data deletion will delete all the stored data
one-time, and unable to be restored. Please careful operation.
13. Data Upload :
The stored data can be uploaded to computer. Make good
connection of computer with RS232 communication wire of the
tester, switch on the tester and run monitoring software, and if the
software displays that interface is open and the connection is
successful, then it can read the stored historical data, upload to
company and preserve.
Monitoring software has the function of online real-time
monitoring and historical inquiry, dynamic display, with alarm value
settings and alarm indicator, and the function of historical data
access, reading, preserve, print and other functions.

23
® ®
24
VII. BATTERY REPLACEMENT :
Please don’t replace battery in flammable spot.
Please don’t replace battery during measurement.
Pay attention to battery polarity and specification,
and don’t mix use of new and used battery to avoid
damage on tester.
When the enclosure of Tester is wet, please do not
open battery cover.
Please put the used batteries in appointed collection
place.
1. Switch off; making sure that the Tester is under switch-off state.
2. Loosen the four screws on battery cover at the bottom of the
Tester, and open battery cover.
3. Replace new battery, pay attention to battery polarity and
specification, close battery cover, and fasten screw.
4. Switch on verification, otherwise re-operate.
VIII. ACCESSORIES :
Tester
Tester Bag
Auxiliary Earthing Rod
Standard Testing Wire
Simple Testing Wire
Zinc-manganese Dry Battery
Monitoring Software Disk
RS232 Communication Cable
Manual/Warranty
Card/Qualification Certificate
1 PC
1 PC
4 PCS
4 wires : each for red 20m, black
20m, yellow 10m, and green 10m
2 wires : each for red 1.6m and
black 1.6m
6 PCS (R14S 1.5V)
1 Copy
1 PC
1 Copy

25
® ®
26
MUMBAI
TEST CERTIFICATE
EARTH RESISTANCE
SOIL RESISTIVITY TESTER
This Test Certificate warrantees 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 1320
SERIAL NO. ___________
DATE: ___________
ISO 9001
REGISTERED
QC
PASS
KUSAM-MECO
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.
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, burnt PCB's,
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.
“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.
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.
All transaction are subject to Mumbai Jurisdiction.