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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