HTC CE8200 User manual

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Content
I. Safety rules and precautions ....................................................... 3
II. Introduction ................................................................................ 5
III. Model parameters ..................................................................... 6
IV. Range and Accuracy ................................................................. 6
V. Technical Specifications ............................................................. 8
VI. Instrument structure ................................................................ 10
VII. LCD ......................................................................................... 11
VIII. Principle of Resistance Measurement .................................. 13
IX.Operation ................................................................................. 14
1. Switch Machine ................................................................... 14
2.Battery Voltage Check ......................................................... 15
3.Resistance current or ground voltage test ........................... 15
4.Alarm system ....................................................................... 16
5.Data Lock ............................................................................. 17
6.Data storage/review/deletion ............................................... 17
X.Battery Description ................................................................... 18
XI.Live Application ........................................................................ 18
1.Multipoint Grounding System ............................................... 18
2.Limited Point Grounding System ......................................... 20
3.Single Point Grounding System ........................................... 21
XII.Packing List ............................................................................ 25

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I. Safety rules and precautions
Thank you for purchasing our company's clamp-on grounding
resistance tester. Before you use the instrument for the first time,
in order to avoid possible electric shock or personal injury,
please be sure to: read carefully and strictly abide by the safety
rules and precautions listed in this manual .
In any case, special attention should be paid to safety when
using this instrument.
 ♦The instrument is designed, produced and inspected
according to IEC61010 safety specifications.
♦ In any case, pay special attention to safety when using this
instrument.
 ♦During measurement, do not use high-frequency signal
generators such as mobile phones near the instrument to avoid
errors.
 ♦Pay attention to the text and symbols on the label of the
instrument body.
 ♦Make sure the instrument and accessories are in good
condition before use.
♦Before starting the machine, squeeze the trigger once or
twice to ensure that the jaws are well closed.
 ♦Do not measure in flammable places, sparks may cause

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explosion.
 ♦When the machine is turned on, do not hold the trigger or
clamp any wires.
 ♦The object to be measured can only be clamped after the
“OL Ω” symbol is displayed after it is turned on normally.
♦ Do not place and store the meter for a long time in places
with high temperature and humidity, condensation and direct
sunlight.
♦ When replacing the battery of the meter, please make sure
that the meter is turned off.
 ♦The meter displays the low battery voltage symbol “ ”,
the battery should be replaced in time, otherwise it will lead to
ground error.
♦ The contact surface of the jaws must be kept clean and
cannot be wiped with corrosives and rough objects.
♦ When opening the trigger, avoid shock to the clamp meter,
especially the jaw interface.
 ♦When the clamp meter is measuring resistance, the clamp
head will make a slight noise, which is normal.
Pay attention to the "beep-beep-beep--" sound to distinguish
the alarm.
 ♦Pay attention to the measurement range and operating

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environment specified by this instrument.
 ♦The current of the measuring lead should not exceed the
upper limit of the clamp meter.
 ♦The use, disassembly, calibration and maintenance of this
instrument must be operated by authorized personnel.
 ♦Due to the reasons of this instrument, if it is dangerous to
continue using it, you should stop using it immediately and seal
it up immediately.
♦Deposits shall be processed by authorized institutions.
♦The “ ” safety warning sign in the instrument and manual,
the user must strictly follow the instructions in this manual
for safe operation.
II. Introduction
Clamp ground resistance tester, also known as loop resistance
tester, is used to test ground resistance. This instrument uses a
new black luxury screen design, the resistance current is
displayed on the same screen, and it also has functions such as
data storage, data review, alarm, and automatic shutdown. The
whole machine is beautiful and high-grade, with a wide range,
high resolution, convenient operation, convenient carrying,
accurate, reliable, stable performance and strong
anti-interference ability. Moreover, it has a shock-proof,

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dust-proof and moisture-proof structure. It is a common and
indispensable instrument for telecommunications, electricity,
meteorology, computer rooms, oil fields, electromechanical
installation and maintenance, and industrial enterprises that use
electricity as industrial power or energy. It is suitable for
measuring grounding resistance of various telecommunications,
electric power, meteorology, computer room, oil field, power
distribution lines, tower transmission lines, gas stations, factory
grounding grids, lightning rods, etc.
The clamp ground resistance tester is controlled by a
microprocessor and can accurately detect ground resistance. It
uses fast filtering techniques to minimize interference.
Simultaneous data storage and data upload functions.
III. Model parameters
Model
Resistance Range
Current Range
CE8200
0-1000Ω
NA
CE8202
0-1200Ω
0.00mA-20A
CE8203
0-200Ω
NA
IV. Range and Accuracy
Measurement
Mode
Measuring
Range
Resolution
Accuracy
0.010Ω-0.099Ω
0.001Ω
±（1%＋0.01

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Resistance
Ω）
0.10Ω-0.99Ω
0.01Ω
±（1%＋0.01
Ω）
1.0Ω-49.9Ω
0.1Ω
±（ 1%＋0.1Ω）
50.0Ω-99.5Ω
0.5Ω
±（1.5%＋0.5
Ω）
100Ω-199Ω
1Ω
±（2%＋1Ω）
200Ω-395Ω
5Ω
±（5%＋5Ω）
400-590Ω
10Ω
±（ 10%＋10Ω）
600Ω-880Ω
20Ω
±（ 20%＋20Ω）
900Ω-1200Ω
30Ω
±（ 25%＋30Ω）
*Current
0.00mA -9.95mA
0.01mA
±（2.5%＋
1mA）
10.0mA -99.0mA
0.1mA
±（2.5%＋
5mA）
100mA -300mA
1mA
±（2.5%＋
10mA）
0.30A-2.99A
0.01A
±（ 2.5%＋0.1A）
3.0A-9.9A
0.1A
±（ 2.5%＋0.3A）
10.0A-20.0A
0.1 A
±（ 2.5%＋0.5A）
*Only available for instruments with current function

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V. Technical Specifications
Function
Ground resistance test, loop
resistance test, leakage current test
Ambient Temperature
and Humidity
23℃±5℃, below 75%rh
Power Supply
DC 6V (4 AA dry batteries)
Measurement Method
mutual inductance
Resistor Resolution
0.001Ω
*Current resolution
0.01mA
Jaw size
55mm×32mm
*Ω + A sync display
Ω + A sync display
Ground voltage
measurement function
None
Display Mode
4-digit LCD display, black screen
design
LCD size
46mm×29mm
Meter size
Length, width and height:285mm×
85mm×58mm
Measure Time
2 times/sec
Data Storage
300 groups, "MEM" storage
indication, displaying "FULL"
symbol means the storage is full

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Data Access
"MR" symbol indication when
viewing data
Overflow Display
"OL" symbol indication when
overrange overflow
Interference Test
Automatically identify interference
signals, and the "NOISE" symbol
indicates when the interference
current is large
Alarm Function
When the measured value exceeds
the alarm setting value, an alarm
prompt will be issued
Battery Voltage
Real-time display of battery power,
reminding to charge in time when the
battery voltage is low
Automatic shut-down
Automatic shutdown after 5 minutes
of startup
Power consumption
50mA Max
Quality
Meter: 1180g (including battery)
Working temperature and
humidity
-10℃～40℃; below 80%rh
Storage temperature and
humidity
-20℃～60℃; below 70%rh

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Insulation resistance
Above 20MΩ (500V between circuit
and case)
Pressure resistance
AC 3700V/rms (between circuit and
case)
External Magnetic Field
＜40A/m
External Electric Field
＜1V/m
Suitable for safety
regulations
IEC61010-1 (CAT III 300V, CAT IV
150V, pollution degree 2);
IEC61010-031;
IEC61557-1 (grounding resistance);
*Only available for instruments with current function
VI. Instrument structure
1. Pliers
2. Jaw open and close trigger
3. LCD display
4. Power key
5. MODE key
6. AL alarm key
7. MEM memory key
8. SET key
9. HOLD key

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10. Check loop 1Ω loop
11. Check loop 10Ω loop
VII. LCD
1. Clamp head open symbol 2. Alarm indication symbol
3.Greater than symbol 4. AC and DC indication symbols
5. Data access symbols 6. Data storage symbols
7. Noise indicator symbol 8. Data lock symbol
9. Battery level indicator 10. Unit indication
11. Four-digit resistance data 12. Unit indication
13. Number of storage groups 14. Four digits indicate current
Description of special symbols:
⑴. The jaw opening symbol, when the jaw is opened,
this symbol is displayed. At this time, the trigger may be
squeezed artificially; or the jaws are seriously polluted, and the
measurement cannot be continued.

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⑵.“Er” is the error symbol when starting up, it is possible
that the trigger was pressed or the jaws were opened when
starting up.
⑶. Low battery voltage symbol, when the battery
voltage is lower than 5.0V, this symbol displays, the
measurement accuracy cannot be guaranteed at this time, and
the battery should be replaced.
⑷. The "OL Ω" symbol indicates that the measured
resistance exceeds the upper limit of the clamp meter.
⑸. The "L0.01Ω" symbol indicates that the measured
resistance exceeds the lower limit of the clamp meter.
⑹. "OL A" symbol, indicating that the measured current
exceeds the upper limit of the clamp meter.
⑺. Alarm symbol, when the measured value is greater
than the set alarm threshold, the symbol will flash and display,
and the instrument will emit intermittent "beep-beep-beep--"
sound.
⑻. MEM data storage symbol, flashes when saving data.
⑼. MR refers to the data symbol, which is displayed when
referencing data, and the number of the stored data is displayed
at the same time.
⑽.NOISE symbol, when the ground loop under test has a

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large interference current, this symbol flashes and displays, and
the instrument emits a "beep-beep-beep--" prompt sound. The
accuracy of the test cannot be guaranteed at this time.
VIII. Principle of Resistance Measurement
The basic principle of the clamp-type grounding resistance
tester to measure the grounding resistance is to measure the loop
resistance. See below. clamp meter
The mouth part is composed of a voltage coil and a current
coil. The voltage coil provides the excitation signal and induces
a potential V on the loop under test. Under the action of the
potential V, a current I will be generated in the circuit under test.
The clamp meter measures V and I, and the measured resistance
R can be obtained by the following formula.
R=V/I

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IX.Operation
1. Switch Machine
When starting up, do not depress the trigger, open
the jaws, or clamp any wires.
After the boot is completed and "OL Ω" is displayed,
the trigger can be pulled, the jaws are opened, and
the conductor under test can be clamped.
Before starting the machine, squeeze the trigger once
or twice to make sure the jaws are well closed.
When starting up, keep the clamp meter in a natural
static state, do not turn the clamp meter over, and do
not apply external force to the jaws, otherwise the
measurement accuracy cannot be guaranteed.
Press the power button to switch the machine on and off. The
meter automatically calibrates when powered on, and displays
“OL Ω” after it is powered on, and automatically enters the
resistance measurement mode. If there is no normal boot-up
self-calibration, the meter will display the “Er” symbol,
indicating a power-on error. Common reasons for power-on
errors are that the jaws are not closed well, Clamp wires etc.
when starting up.
It will automatically shut down after 5 minutes of turning it on.

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Before the automatic shutdown, the meter will flash for 30
seconds. Pressing the power button again will delay the on-off
time for 5 minutes.
2.Battery Voltage Check
After power on, if the LCD displays the low battery voltage
symbol “ ”, it means the battery is low, please replace the
battery. The battery power is sufficient to ensure the accuracy of
the measurement.
3.Resistance current or ground voltage test
When the user thinks that the grounded value is not in
line with the normal, you can use the random
calibration ring to check whether the clamp meter is
normal. The check loop has two resistance values of
1Ω and 10Ω respectively.
After the power-on self-test is completed, the large number in
the middle displays "OLΩ", and the resistance measurement can
be performed. At this point, squeeze the trigger, open the jaws,
clamp the circuit to be tested, and read the resistance value.
Resistance and earth leakage can be measured at the same time.
Press the "MODE" button to switch between "resistance +
current" and "resistance" modes after power on.

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The large number in the middle shows "OLΩ", indicating that
the measured resistance exceeds the upper limit of the clamp
meter.
The large number in the middle shows
"L0.01Ω", which means that the measured
resistance exceeds the lower limit of the clamp
meter.
In the "resistance + current" mode, the lower
right of the display shows the current value,
such as "0.00mA", if you need to measure the
current, switch to this mode to read the current
value directly.
Resistance + Current Mode:
The measured resistance value is 0.51Ω,
The number of saved groups is 1 group, and the measured loop
current is 0.00mA
4.Alarm system
After power on, short press the "AL" key to turn on or off the
alarm function, long press the "SET" key to set the resistance,

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current, and voltage alarm values, change the current number by
pressing the "AL" key and "MEM" key, and short press the "
MODE" key to switch the alarm mode, then long press the
"SET" key to save and exit. When the measured resistance value
is greater than the alarm critical set value and the alarm function
is turned on, the meter flashes the " " symbol and emits an
alarm sound of "beep-beep-beep--". The maximum value of the
ground resistance alarm setting is 200Ω. As shown below:
5.Data Lock
After the measurement is stable after power-on, short press the
"HOLD" key to lock the current display data and save the data,
and then short press the "HOLD" key to exit the lock mode. As
shown below:
6.Data storage/review/deletion
When the measurement is completed after power on, short press
the "HOLD" key to store the data. The "MEM" symbol flashes
and automatically numbered. If the storage is full, the meter

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flashes the "MEM" symbol. Take the interface "MR" symbol
display. Press the "AL" or "SET" key to select the data
corresponding to the array number with a step value of 1, and
then short press the "MEM" key to exit the search. See the
picture below, the left picture is the flashing “MEM” symbol
when data is stored, and the current storage group number is 1;
the middle picture is the data review mode, and the current
reference group number is 1.
In the data review state, long press the "MEM" button, then
press the "Power button" button to delete the stored data.
X.Battery Description
When the voltage drops to 5.0V, the power symbol “ ” will
be displayed, please replace the battery. Low battery voltage
affects measurement accuracy.
XI.Live Application
1.Multipoint Grounding System
For multi-point grounding systems (such as transmission system
tower grounding, communication cable grounding systems,
certain buildings, etc.), they are connected through overhead

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ground wires (the shielding layer of communication cables) to
form a grounding system. See below. When measured with a
clamp meter, its equivalent circuit is as follows:
Where: R1 is the predicted ground resistance.
R0 is the equivalent resistance of the grounding resistances of
all other towers in parallel.
Although, from the strict grounding theory, due to the existence
of the so-called "mutual resistance", R0 is not a parallel value in
the usual electrotechnical sense (it will be slightly larger than
the parallel value in the electrotechnical sense), but, since the
grounding hemisphere of each tower is much smaller than the
distance between towers, and after all, the number of grounding
points is large, R0 is much smaller than R1. Therefore, it is
reasonable to assume R0=0 from an engineering point of view.
In this way, the resistance we measure should be R1.
Contrasting experiments with traditional methods in different
environments and occasions have proved that the above
assumptions are completely reasonable.