Sunsky 4100 User manual

Contents
A.General Introduction
A.General Introduction
B.Safety Rules
C.Performance Features
D.Technical Specification
E.Panel Description
F.Operation Instruction
G.Replacing Battery
H
Digital Earth Resistance Tester is a new generation
tester for electrician practice which is developed by our
company in recent years.The circuit,structure and
technique of traditional earth resistance tester have
been improved and the new design is both fine-looking
and practical.This one has more complete functions,
higher accuracy,more convenient and reliable for
operation and more suitable for outdoor use with dust
and wet proof structure.It can test earth resistance of
various earth systems including power systems,electric
equipments,lightning conductors as well as resistance
value of low resistance conductor and AC voltage test.
.Accessories
4100
Digital Ear th Resistance Tester
B.Safety Rules
1.Please read this manual carefully before use.
2.It should not be used before placing the back cover
back to avoid risk of electric shock.
3.Please do not touch lead terminal and circuit under
test to avoid electric shock.
4.Please make sure the range select switch setting
within the proper range before test.
5.Make sure the coupler plug of lead inserted in the
terminal tightly.
6.When the tester is wet,do not use it or replace
battery.
7.Please do not turn the switch during test.
8.Please do not test in flammable places since
sparkles may cause explosion.
9.Please stop use when metal is exposed due to
breakage of casing or testing wire.Make sure the
isolation skin of testing wire is intact before use.
10.Please make sure the testing wire has been
removed from testing terminal and the range select
switch is on off position before replacing battery.
11.Please make sure the range select switch is on off
position after use.
12.Replace battery when shown on tester or
the battery indicator light is off to ensure testing
accuracy.Please remove the battery if not use it for long
time.
C.Performance Features
1.Measuring range of earth resistance:0-2000Ω.
2.Measuring range of earth voltage:0-30V.
3.LED green light indicates normal operating mode.
4.31/2 digit LCD display for more direct and convenient
reading.
5.on LCD indicates deficiency of 12V battery.
30V ±3%rdg+5dg t 0 .1 V
Range accuracy resolution
Range accuracy resolution
20 2 %rdg+0.1 0 .0 1
2 0 0 ±2%rdg+3 d g t 0.1
20 0 0
LED red lighting off indicates deficiency of 1.5V battery.
6.Response time:measure earth resistance,about 5
seconds.Measure earth voltage,about 2 seconds.
7.Withstand voltage:AC 500V,1 minute between
circuit and outer casing.
8.Overload protection:on earth voltage,can withstand
300V AC 1 minute .on earth resistance,can withstand
200V AC 10 seconds .
9.Power supply,six 1.5V AA batteries ,one 12V battery
23A .
10.Dimensions:150×100×70mm.
11.Weight:about 680g including battery .
12.Working environment:
Working temperature:0°C-40°C relative humidity <80%
Storage temperature:-10°C-50°C relative humidity <85%
Ensured accurate temperature:23°C±5°C
relative humidity <80%
Earth Resistance
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D.Technical Specification
E.Panel Description
②“ ” （ ）
③“ ” （ ）
④“ ” （ ）
⑤“ ” （ ）
⑥
⑦
⑧
⑨
⑩
LCD display
E port earth electrode
P port electric potential pole
C port current pole
V port voltage pole .
Function switch.
HOLD data holding switch
TEST testing button
POWER power indicator light (red)
OK operation indicator light (green)
！
a.Battery Voltage Inspection
No symbol on LCD indicates 12V battery is good.
symbol on LCD means 12V battery is required to replace.
b.3-wire Earth Resistance Test
NOTE:maximum 50V voltage may be generated
between E-C or E-P terminals when testing earth
resistance
Please do not touch testing lead to avoid electric
shock.
Please make sure testing wire plug insert in testing
terminal thoroughly before testing since loose
connection may cause error in testing result.
①
②
③ ④ ⑤
⑧
⑥
⑦
⑩ ⑨
Please note that measurement difference created by
auxiliary earth resistance is 0-10 ≤ 2kΩ Ω
Ω
Ω
1Ω
Ω
Ω
Ω
Ω
Earth Voltage(AC)
F.Operation Instruction
①

NOTE:be careful of electric shock when using
commercial electric system earth method for test.
Please do not use this tester to measure supply
voltage.
2 Earth Voltage Measurement
Please turn the range select switch to earth voltage.
Make sure the voltage value below 10V since error
may occur to measuring value of earth voltage if the
voltage value above 10V.At this point,one can break
the power supply of tested earth electrode equipment
to lower earth voltage and then measure the value.
3 Earth Resistance Measurement
First please press Test/Stop beginning from
2000 .If the shown value is too low ,switch to 200
/20 to do the test and the reading here is the tested
earth resistance value.
Note: Since measuring current is low to about 2mA,
Calculate the real earth voltage value RX by equation
below:
RX=RE re
re:earth resistance of common earth electrode of
commercial electric power system,etc.
Re:reading value of instrument earth resistance.
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Ω Ω
Ω
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G.Replacing Battery
H.Accessories
1 Do not open the battery cover if the outer casing is
wet.
2 Please do not replace the battery during test.
Please turn the range switch to off and remove testing
leads,control bar,etc before replacing the battery to
avoid electric shock.
Undo the screw on battery cover at the bottom of the
unit and open the battery cover.
Replace new batteries,put battery cover back and
tighten the screw.
1 auxiliary earth bar 2
2 testing wire 1
3 simple testing wire 1
4 1.5V(R6AA)battery 6
5 12V(23A)battery 1
6 instruction manual 1
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In the picture,
E connects earth electrode port
P connects electric potential pole port
C connects current pole port
V connects voltage pole port
value above 10V.At this point,one can break the power
supply of tested earth electrode equipment to lower
earth voltage and then measure the value
4 Earth Resistance Measurement
.
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First please press Test/Stop beginning from
2000 .If the shown value is too small,switch to 200
/20 and the shown value here is namely the tested
earth resistance value.
Note:make sure connecting wires separated during
wire connecting since testing when testing leads wind
about with each other may encounter mutual
inductance to affect reading.The auxiliary earth
resistance value may be too big and error may occur to
show value.Make sure auxiliary earth bar P and C into
wet land and complete contact of connecting parts.
c. Simple Earth Resistance Measurement
The method is designed for places where auxiliary
earth bar cannot be punched.Use a earth electrode
with quite small earth resistance like metal water pipe,
common earth electrode of commercial electric power
system,earth end of building,etc to substitute
auxiliary earth bar P and C.
1 Testing Wire Connection
Please connect simple testing wires according to
picture below.
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Ω
Ω
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1 Testing Wire Connection
As shown in picture below,punch assistant earth bar P1
andC1 in earth 5 to10 meters distant from tested earth
substance;connect green wire to terminal E,yellow wire
to terminal P and red wire to terminal C
Note:please place assistant earth bar in land with high
water content.You need add water in dry land,sand land
or land containing crushed stones to maintain humidity of
inserting position of earth bar.
Lie earth bar flat and add water when meeting cement
ground and cover wet towel,etc on earth bar before
testing.
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In the picture,E connects earth electrode port
P connects electric potential pole port
C connects current pole port
V connects voltage pole port
2 Inspection of Power Supply and Wire Connection
Press Test/Stop ,POWER light off indicates
insufficient 1.5V battery.Please replace it.
OK light on indicates normal connecting of lead and
E,C terminals, and auxiliary earth resistance is
within permitted range.If light is off,check the lead
connecting E and C terminals or change the position of
earth bar,or water the land to lower auxiliary earth
resistance to a proper level.Check breakage by short
circuit of spring clamps of red and green lead .
3 Earth Voltage Measurement
Please turn the range select switch to earth voltage.
Make sure the voltage value below 10V since error may
occur to measuring value of earth voltage if the voltage
Rev.5
transformer
(secondary)
earth electrod
(elementary)
the circuit breaker will not take effect even being connected
(red 15-meter testing wire /
yellow 10-meter testing wire /
green 5-meter testing wire)
(red 1.6-meter testing wire /
green 1.6-meter testing wire)
7 tool bag 1
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