HVTest HT5600 User manual

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Dear Client
Thank you for Purchasing our HT5600 Earth Resistance
Tester. Please read the manual in detail prior to first use, which will
help you use the equipment skillfully.
Our aim is to improve and perfect the
company's products continually, so there may be
slight differences between your purchase equipment
and its instruction manual. You can find the changes
in the appendix. Sorry for the inconvenience. If you have further
questions, welcome to contact with our service department.
The input/output terminals and the test column
may bring voltage, when you plug/draw the test wire or
power outlet, they will cause electric spark. PLEASE
CAUTION RISK OF ELECTRICAL SHOCK!
Company Address:
T4，No. 41, High-tech 2 Road，East Lake High-tech Development Zone，
Wuhan
Sales Hotline: [phone]
After Service Hotline:[phone]
Fax: [phone]
E-mail: [email protected]
Website: www.hvtest.cc

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SERIOUS COMMITMENT
All products of our company carry one year limited warranty
from the date of shipment. If any such product proves defective
during this warranty period we will maintain it for free. Meanwhile
we implement lifetime service. Except otherwise agreed by
contract.
SAFETY REQUIREMENTS
Please read the following safety precautions carefully to avoid
body injury and prevent the product or other relevant subassembly
to damage. In order to avoid possible danger, this product can only
be used within the prescribed scope.
Only qualified technician can carry out maintenance or repair
work.
--To avoid fire and personal injury:
Use Proper Power Cord
Only use the power wire supplied by the product or meet the
specification of this produce.
Connect and Disconnect Correctly
When the test wire is connected to the live terminal, please do
not connect or disconnect the test wire.
Grounding
The product is grounded through the power wire; besides, the

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ground pole of the shell must be grounded. To prevent electric
shock, the grounding conductor must be connected to the ground.
Make sure the product has been grounded correctly before
connecting with the input/output port.
Pay Attention to the Ratings of All Terminals
To prevent the fire hazard or electric shock, please be care of
all ratings and labels/marks of this product. Before connecting,
please read the instruction manual to acquire information about the
ratings.
Do Not Operate without Covers
Do not operate this product when covers or panels removed.
Use Proper Fuse
Only use the fuse with type and rating specified for the product.
Avoid Touching Bare Circuit and Charged Metal
Do not touch the bare connection points and parts of energized
equipment.
Do Not Operate with Suspicious Failures
If you encounter operating failure, do not continue. Please
contact with our maintenance staff.
Do Not Operate in Wet/Damp Conditions.
Do Not Operate in Explosive Atmospheres.
Ensure Product Surfaces Clean and Dry.

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－Security Terms
Warning: indicates that death or severe personal injury may
result if proper precautions are not taken
Caution: indicates that property damage may result if proper
precautions are not taken.

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Contents
I .Introduction............................................................................................. 6
II .Overview................................................................................................ 6
III .Main Features...................................................................................... 7
IV. Main Technical Index......................................................................... 8
V. Panel Features..................................................................................... 8
VI. Measurement principle and application........................................ 10
(1) Two- clamp method.......................................................................10
1、The measuring principle............................................................10
2、Multi-polar parallel grounding resistance measurement..... 11
3、Two-clamp method measure the independent grounding
objection............................................................................................. 13
(2) Four-leads method........................................................................ 14
(3) Store.................................................................................................14
(4) View / Delete.................................................................................. 15
(5) Keep.................................................................................................15
VII. Notes..................................................................................................16
VIII. Accessories..................................................................................... 16

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I .Introduction
HT5600 Clamp Earth Resistance Tester with multi-function
used in evaluation on ground resistance. Our company are
experienced in designing and manufacturing ground tester.
Is hand portable and is equipped with the necessary
attachments. It is easy to use. Operators can use it just following
this instruction without participating in specialized training.
II .Overview
It is important for electricity, telecommunications, electrical
equipment to ground. Grounding resistance is widely used in the
judgment of the grounding quality of system. Accurate, rapid,
simple, reliable grounding resistance measurement methods are
important in the field of lightning protection grounding technology.
ET3000 Multi-function dual-clamp grounding resistance tester is
suitable in telelecommunications, electricity, meteorology, computer
room, power distribution lines, transmission line tower, gas stations,
factories grounding grids, lightning and so on.
Can be used in traditional auxiliary electric pole grounding
resistance measuring and also can be used without auxiliary
electric-pole which can test the grounding resistance in duty without

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contacting the grounding system and load. Auxiliary electric-pole
test method can be used just in single-point grounding system or
strong interference conditions.
III .Main Features
1. Dual-Clamp method & pile method:
Grounding for any place, multi-point or single point grounding;
2. Anti-interference ability:
Self-generated high frequency current can be used to filtered
harmonic interference of industory power ,so it will measure
accurately under 500KV substation;
3. Wide measuring range, high resolution:
Range from 0.01Ω ~ 200Ω, resolution of 0.01Ω, grounding
resistance lower than 0.7Ω can be measured accurately;
4. Great gag Design:
Gag diameter is 50mm (standard configuration) and it can
meet with flat iron and steel wire ;special gag custom sizes can be
customized;
5. Large-capacity data storage:
200 sets of measurements can be stored;
6. Easy to operate with single-person:
Chinese operation interface, small size, light weight, portable
explosion-proof box, easy to carry for outdoor measurement.

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IV. Main Technical Index
1、Grounding resistance measuring range:
Two-clamp method：0.01Ω～200Ω
Four-leads method：0.01Ω～200Ω
2、Error:
Two-clamp method：±3%±2d
Four-leads method：±2%±2d
3、Minimum resolution：0.01Ω
4、Clamp size：Φ50mm
5、Storage capacity: 200 group data
6、Working temperature: 0ºC ～+ 50°C
7、Power Supply: Eight 5 Ni-MH rechargeable batteries or
regular AA batteries
8、Weight：0.8kg (including battery)
9、Dimensions：265mm×130mm×65mm
V. Panel Features
1、button features
The tester has total seven buttons, the following specific
features:
“Power Supply”: if has opening, after five minutes without

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any operation , it will be automatically shutdown.
“Two-clamp method▲”: In multi-point grounding of the
grounding grid, to test this way; In addition, other functions, the key
for the cursor up or increase the bond.
“Four-leads method▼”: Click here to play auxiliary keys
used to pile measured grounding resistance, while, in other
functions, the key for the cursor down or reduce the bond.
“ ”: The left cursor key
“ ”: The right cursor key
“Test”: When using the two-clamp method or four-leads
method, this key to start measurement.
“Confirmed”: Click here to enter the selected function.
2、Test port（refer to Figure 1）
(Figure 1: Terminal panel)
The instrument interfaces to connect with the outside world
there are two groups: the two-clamp method use upper "Receive"
and "Transmit" two jack; the four-leads method using the "C2",
"P2", "P1" and "C1" four jack.
Charge jack located at the bottom left of the equipment, when
the instrument displays the upper-left corner of the low battery

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indicator, please use the company’s charging instrument to charge.
It’s the smart charger for the battery charger. When the battery is
full, that is, the charger indicator light to turn off automatically stop
charging the battery, effectively preventing battery overcharge.
Note: if the instrument will not be used in long-term, you also
should be carried out regularly charge the battery (such as two
months) ,in order to avoid battery over-discharge damage. Do not
charge the battery when use ordinary batteries.
VI. Measurement principle and application
(1) Two- clamp method
1、The measuring principle
The method has many advantages. First, easy to operate. The
test can be executed when the device is working. No measuring
probes are needed and it is not necessary to separate the
electrodes. The grounding resistance can be obtained by clamping
the grounding conductor. Second, the method has high accuracy
to 0.01Ω. Third, the method has high anti-interference ability and
the line frequency harmonics can be filtered. Fourth, it can be a
way to piling method. In many conditions (such as housing or
regions covered with cement-intensive), it is difficult to adopt the
way of piling to measure the grounding resistance. But it is not
necessary for double clamp method. However there is shortage of
this method too. And it can not measure the grounding resistance
for a single point grounding system.
The measurement principle be summarized as follows: The

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instrument is equipped with two shut up: voltage clamp and current
clamp.
As shown in Figure 2, potential E in the voltage-clamp is
excited in the measured and cause current I in the circuit. And the
current in the clamp can be measured. Using Ohm's law: R = E / I,
the value of R can be obtained.
Figure 2 The measuring principle
2、Multi-polar parallel grounding resistance measurement
Multi-point grounding system (such as the transmission tower
grounding system, grounding cable communications system,
certain buildings, etc.) grounds through the overhead ground wire
(shield communications cable) connection, as shown in Figure 3:
Figure 3
The two gaps of the clamps which are properly plugged in the
jacks are clamped on the grounding wire with distance of 30cm.
The two jacks are not interchangeable, the equivalent circuit shown

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below.
Figure 4
Then RT=Rx+ R0
Of which:
RT: the measured value;
Rx: grounding resistance;
R0: All other tower grounding resistance of the equivalent
parallel resistance.
Although from a strictly theoretical, because of the so-called
"mutual resistance" existence, R0is not the usual sense
electrotechnics parallel value (it will larger than the value in
electrotechnics), but because the grounding hemisphere is much
less than their distance and number of the grounding points is big
so R0will be much less than R1 and we can assume R0= 0. Then
RT≈ Rx.
The theory is proved be true with many test under different
environments comparing to traditional method.
Non-contact measurement method (i.e., double clamp) is an
advanced measurement technology and it has many advantages.
However, the measure resistance includes the he entire circuit
grounding resistance. Care must be taken in analyzing the result.

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Note: The clamps of charging and receiving are not
interchangeable.
3、Two-clamp method measure the independent grounding
objection
A．There must be an effective closed-loop for two-clamp
method in the testing process The solution is to find an auxiliary
electrode, and link the tested grounding objection with well
grounding system (such as water pipes, etc.) Then clamp the two
clamps on the wire with a distance of 30cm. Then enter the double
clamp interface by pushing button “double clamp” and get the value
by pushing “test” button. Different method can be chosen under
different conditions in measuring independent grounding
resistance.
B．The grounding resistance can be measured when the
devices are in lower floors (the ground floor or second floor).
C. Devices in a higher floor can use "independent grounding"
test method. The grounding resistance of water pipe is assumed to
be zero of the theory. But it is not true. So the value RAshould be
obtained with "independent grounding" test methods and then the
resistance RBof water pipe get measured with the same method
and then been subtracted from RA.
Figure 5

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D、During clamp method dual-resistance, if the measured
value display overflow, then the measured resistance exceeds the
measuring range of the instrument or description does not shut up
any metal clamp around the conductor or the grounding line under
test
(2) Four-leads method
Using the connection method as Figure 6. At this point click "
Four-leads" button, enter the interface to the Four-leads method.
And then "test" button can be measured more accurately measured
grounding resistance of grounding.
(3) Store
After each measurement, the measurement results can be
Figure 5 Four-Leads method

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stored. Shifted right or left button , the cursor stop in the "Storage"
and press the "confirm" key to enter the storage function. Enter the
number, and then press "confirm" to store, for example,
measurement data to be stored in Group 7, the number will be
adjusted to 007, and then "confirm" key to confirm to complete the
storage. If the number has data, then the original data is overwritten.
Continue to test, press the "confirm" key to return to Test status.
The machine can store 200 groups of data.
(4) View / Delete
In the two-clamp method and four-leads method interface, the
cursor moved to the "Back" on, and click the "confirm" button, that
is, the right to enter the main menu, then "▲" "▼" button, select
"view of historical data" or "To delete the historical data." And then
"confirm" button, enter the corresponding functions. By " " " "
about the adjustment, press "▲", "▼" to adjust the number, press
the "confirm" key to confirm, you can access stored value, or delete
stored values.
(5) Keep
During the two-clamp method and four-leads methods testing
process, because environmental and outside interference factors,

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there may has a phenomenon of numerical instability. During
testing, when the cursor stays in the "maintain" you can press the
"confirm" key to lock the measurement values for the surveyor to
record and read values. At this time screen "keep" change into
"disarm", and then click "confirm" to unlock features.
VII. Notes
1、Clamp and Main Frame for supporting the use of the factory
with a good pre-required. In order to avoid measurement error,
Clamp and Main Frame may not be used by other Main Frame.
2、Anytime should keep the clamp surface cleaning, the
contaminated clamp instrument will reduce the accuracy of the
measurement.
3、Clamp must be clamped well in testing.
VIII. Accessories
1、One main frame
2、Two clamp
3、One Check ring
4、Two pillars
5、Four measuring leads
One 40m wires for four-leads

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One 20m wires for four-leads
Two 1.5m wires for four-leads
6、One test certificate
7、One operation manual
8、One certification