HTC CE8200 User manual

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CONTENT
Ⅰ. Safety Rules and Precautions.................................................. 2
Ⅱ. Brief Introduction ...................................................................... 4
Ⅳ. Range and Accuracy ................................................................ 5
1.Ranges and Accuracy of Measurement.................................. 5
VII. LCD Display............................................................................. 9
Description of Special Symbols................................................ 10
VIII. Measuring Principle...............................................................11
IX. Operation Method....................................................................11
1.Boot up ...................................................................................11
2. Battery Voltage Check.......................................................... 12
3. Resistance Test .................................................................... 13
4．Clock Settings..................................................................... 14
5.Alarm Settings....................................................................... 14
6.Date Lock............................................................................... 15
7．Data Storage / Review / Delete........................................... 15
Ⅹ. Battery Instructions................................................................. 16
ⅩI. Field Application .................................................................... 16
1. Multi-Point Grounding System.............................................. 16
2. Limited Point Grounding System.......................................... 17
3. Single-Point Grounding System........................................... 19
ⅪI．Accessories........................................................................ 22

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Ⅰ. Safety Rules and Precautions
Thank you for purchasing our company's clamp grounding
resistance tester. Before using the instrument for the first time,
in order to avoid possible electric shock or personal injury, please
be sure to: read and strictly observe the safety rules and
precautions listed in this manual.
In any case, use this instrument should pay special attention to
safety
The instrument is designed, produced and inspected
according to IEC61010 safety specifications.
In any case, the use of this instrument should pay special
attention to safety.
When measuring, high-frequency signal generators such as
mobile phones should not be used next to the meter to avoid
errors.
Pay attention to the text and symbols on the body of the
instrument.
Before use, make sure that the instrument and accessories
are in good condition before use.
Before starting the machine, press the trigger once or twice to
ensure that the jaws are closed properly.
Do not measure in a flammable place. Sparks may cause an
explosion.

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Do not withhold the trigger and do not clamp any
wires when turning on the meter
After the power is turned on normally, the "OL Ω" symbol is
displayed, and the measured object can be clamped.
Do not place and store the instrument for a long period of time
under conditions of high temperature, humidity, condensation,
and direct sunlight.
When replacing the battery with the meter, make sure the
meter is turned off.
The instrument displays the battery voltage low symbol
“”, should replace the battery in time, otherwise it will
lead to ground error.
The jaw contact surfaces must be kept clean and cannot be
wiped with corrosives and rough objects.
When opening the trigger, avoid the impact of the clamp,
especially the jaw joint.
When the clamp meter measures the resistance, the clamp
head will make a slight noise, which is normal. Note the
“deep-beep-beep--” sound that distinguishes the alarm.
Pay attention to the measuring range and use environment
specified by this instrument.
Do not measure the lead current above the upper limit of the
clamp meter.
The use, disassembly, calibration and maintenance of this
instrument must be performed by authorized personnel.

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Because of the reason of this instrument, if it is dangerous to
continue using it, it should be immediately stopped and sealed
immediately, and it should be handled by a qualified
organization.
The " " safety warning sign in the instrument and manual
must be operated strictly in accordance with the contents of
this manual.
Ⅱ. Brief Introduction
Clamp ground resistance tester, also known as loop
resistance tester, is used to test grounding resistance. The
instrument uses a new black luxury screen design, resistance
display in the screen, data storage, data access, alarm, automatic
shutdown and other functions. The machine is beautiful and
upscale, has a wide range, high resolution, convenient operation,
easy to carry, accurate, reliable, stable performance, strong
anti-interference ability. Moreover, it has a shockproof, dustproof,
moisture-proof structure and is a commonly used 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
various grounding resistances such as telecommunications,
electricity, meteorology, computer rooms, oil fields, power

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distribution lines, transmission lines of iron towers, gas stations,
factory grounding networks, and lightning rods.
The clamp ground resistance tester is controlled by the
microprocessor and can accurately detect the ground resistance. It
uses a fast filtering technique to minimize interference.At the same
time data storage and data upload functions
III. Model differentiation
Model
Resistance
Range
Current Range
CE8200
0-1000Ω
NA
Ⅳ. Range and Accuracy
1. Ranges and Accuracy of Measurement
Mode
Range
Resolution
Accuracy
Resistance
0.010Ω-0.099Ω
0.001Ω
±（1%＋0.01Ω）
0.10Ω-0.99Ω
0.01Ω
±（1%＋0.01Ω）
1.0Ω-49.9Ω
0.1Ω
±（1%＋0.1Ω）
50.0Ω-99.5Ω
0.5Ω
±（1.5%＋0.5Ω）
100Ω-199Ω
1Ω
±（2%＋1Ω）
200Ω-395Ω
5Ω
±（5%＋5Ω）
400-590Ω
10Ω
±（10%＋10Ω）
600Ω-880Ω
20Ω
±（20%＋20Ω）
900Ω-1000Ω
30Ω
±（25%＋30Ω）

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Ⅴ. Technical Specifications
Functions
Ground resistance test, Loop resistance test
Ambient Temperature
and Humidity
23℃±5℃，below 75%rh
Power Supply
DC 6V （4 AA alkaline dry batteries）
Range
CE8200 Resistance：0.01-1000Ω
Measure Method
Mutual induction
Resistance Resolution
0.001Ω
Jaw Size
55mm×32mm
Clock Function
Have
Display Mode
4-digit LCD display, black screen design
LCD Size
46mm×29mm
Meter Size
L/W/H：285mm×85mm×58mm
Measure Time
2times/second
Data Storage
300 groups，"MEM" storage indication, display "FULL"
symbol indicates that storage is full
Data Review
"MR" symbol indicates when looking up data
Overflow display
"OL" symbol indicates over-range overflow
Interference Test
Automatically identify interference signals, the "NOISE"
symbol indicates when the interference current is large
Alarm Function
Alarm when the measured value exceeds the alarm setting
value
Battery Voltage
Real-time display of battery power, reminding timely
charging when battery voltage is low

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Automatic shut-down
Turn off after 5 minutes
Power Consumption
50mAMax
Weight
Meter：1180g (including battery)
Working Temperature
and Humidity
-10℃～40℃；below 80%rh
Storage Temperature
and Humidity
-20℃～60℃；below 70%rh
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 Ⅲ300V、CAT IV 150V、Pollution
degree2)；IEC61010-031；IEC61557-1(earth resistance)；

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Ⅵ.Structure of Meter
1. Clamp Jaw 2. Trigger 3. LCD
4. POWER Key 5. MODE Key 6. AL Alarm Function Key
7. MEM Key 8. SET Key 9. HOLD Key
10.CALIBRATION LOOP:1Ω
11. CALIBRATION LOOP:10Ω

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VII. LCD Display
(1). Jaw Open Symbol
(2).Alarm Symbol
(3). Symbol of Greater Than
(4). DC AC Symbol
(5). Symbol of data access
(6). Symbol of data memory
(7). Noise signal
(8). Data lock symbol
(9). Symbol of battery
(10). Resistance unit
(11). 4-digital LCD figures display
(12). Current unit
(13). 2-Digital No. Of Data Storage Unit
(14). 4-digital LCD current and clock display

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Description of Special Symbols
⑴. Symbol of an open jaw: As a jaw is in the open state,
the symbol shows. At this point, trigger may be artificially
pressed, or the jaws have been seriously polluted, and can
no longer continue to measure.
⑵. “Er” Boot-strap error symbol, May be pressing trigger or jaw
has been opened when the power is turn on.
⑶.Symbol of low battery voltage: when the battery voltage
is lower than 5.2V, the symbol shows, it cannot guarantee
accuracy of the measurements. Batteries should be replaced.
⑷. "OL Ω" symbol indicates that the measured resistance has
exceeded the upper limit of the Meter.
⑸."L0.01Ω" symbol indicates that the measured resistance has
exceeded the lower limit of the Meter.
⑹. "OL A" symbol indicates that the measured current has
exceeded the upper limit of the Meter.
⑺. Alarm symbol: when the measured value is greater than
the critical value of alarm setting, the symbol flashes, and the
meter issued by intermittent "beep--beep –beep--" sound.
⑻. MEM Symbol of data storage,flashing when saving data
⑼. MR Review data symbol, display when viewing data, and
display the number of stored data at the same time.
⑽. NOISE symbol: This symbol flashes when there is a large
interference current in the ground loop being tested. At the
same time, the instrument sounds a “beep-beep-beep-”
prompt. At this point, the accuracy of the test cannot be

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guaranteed.
VIII. Measuring Principle
The basic principle of the ground resistance measurement of the
clamp-type grounding resistance meter is to measure the
loop resistance. See below. The jaw section of the clamp
meter consists of a voltage coil and a current coil. The
voltage coil provides the excitation signal and induces a
potential V on the circuit 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 uses the
following formula to obtain the measured resistance R.
R=V/I
IX. Operation Method
1.Boot up
Boot , DO NOT press the trigger, don’t open jaws, nor

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clamp any wire
Boot complete, show “OL Ω”, then press the trigger,
open jaws, clamp the measured wire
Before booting up, the trigger should be pressed for
a couple of times to ensure the jaws are well closed.
Boot, must maintain clamp meter natural resting
state, don’t flip Clamp, don’t be imposed outside
force on the jaw, otherwise can not guarantee the
accuracy of measurement
Press the power button to switch on and off. The instrument is
automatically calibrated when it is turned on. When the power is
turned on, “OLΩ” is displayed and the resistance measurement
mode is automatically entered. If there is no normal self-calibration,
the instrument will display the “Er”symbol to indicate that the
power-on error occurs. The common cause of the power-on error
is that the jaws are not closed properly、plunge the wires etc.
when starting up.
5 minutes after power on automatically shut down, before the
automatic shutdown device will flash for 30 seconds, then press
the power button will delay the switch time 5 minutes..
2. Battery Voltage Check
After the power is turned on, if the LCD shows the battery voltage
low symbol “”, it indicates that the battery is running low. Please
replace the battery. Sufficient battery power to ensure the accuracy of the

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measurement.
3. Resistance Test
When the user thinks that the grounded value
does not conform to the normal, you can use a
random calibration ring to check whether the
clamp meter is normal. The check ring has two
resistances of 1Ωand 10Ω.
After the power-on self test is completed, the large middle digit
shows “OLΩ” and resistance measurement can be performed.At this
point, withhold the trigger, open the jaws, clamp the circuit under test,
and read the resistance value.
The large middle digit shows "OLΩ", indicating that the measured
resistance exceeds the upper limit of the clamp meter.
The middle large number shows "L0.01 Ω", indicating that the
measured resistance exceeds the lower limit of the clamp meter.
Resistance + clock mode:
The measured resistance loop resistanceis 0.51Ω.
The number of save groups is 1 and the
loop ground voltage to be measured is 0.0V.

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Resistance + clock mode:
The circuit of the measured
resistance exceeds the lower limit,
The number of save groups is 8 and
the current time is 12:08
4．Clock Settings
After power on, long press the "SET" button (more than 3
seconds) to enter the clock setting mode. When the time data
flashes, it is in the modified state. Press the "AL" button or the
"MEM" button to increase or decrease the corresponding data.
Short press the "MODE" button to switch. To modify the data, press
the "SET" button again to save and exit.
5.Alarm Settings
After power on, short press "AL" key to turn on or off the alarm function,
long press "AL" key to set the resistance alarm value, press the "SET"
key and "MEM" key to change the current size, short press "MODE" key
to switch Alarm mode, long press "AL" key to save and exit. When the
measured resistance is greater than the alarm critical setting and the
alarm is turned on, the meter flashes the “”symbol and issues a
“beep-beep-beep--”alarm sound. The maximum value of the ground
resistance alarm setting is 200Ω.As shown below:

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6.Date Lock
After the measurement is stable after power on, short press
“HOLD”key to lock the current display data, save the data, and press
“HOLD”key again to exit lock mode. As shown below:
7．Data Storage / Review / Delete
When the measurement is completed after power on, short
press "HOLD" key to store data, "MEM" symbol flashes and
automatically numbers, if the memory is full, the instrument flashes
to display "MEM" symbol, press "MEM" key to enter the data
review, store data reading interface "MR" symbol display.Press
“AL”or“SET”key to select the corresponding data of the array
number with a step value of 1, and press “MEM”again to exit.
See the figure below. The left figure flashes the “MEM”symbol
when the data is stored. The current storage group number is 1;
the middle figure is the data reference mode, and the current
number of reference groups is 1.
In the data review state, long press the "SET" button, then
press the "POWER" button to delete the stored data

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Ⅹ. Battery Instructions
When the voltage drops to 5.2V, the battery symbol " " is
displayed. Please replace the battery. Low battery voltage affects
measurement accuracy.
ⅩI. Field Application
1. Multi-Point Grounding System
As for the multi-point grounding system (such as electricity
transmission tower grounding system, grounding cable
communications systems, certain buildings, etc.), They usually
pass the overhead ground wire (cable shielding layer) connected
to form a grounding system.See below. As the Meter is in the
above measurement, its equivalent electric circuit is shown in the
figure below:
Where: R1is the target grounding resistance.
R0is the equivalent resistance of the other entire tower
grounding resistances paralleled.

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Although strictly on the theoretical grounding, because of the
existence of so-called "mutual resistance”, R0is not the usual
parallel value in the sense of electrical engineering (slightly higher
than its IEC parallel output value). But because a tower-grounding
hemisphere was much smaller than the distance between the
towers, and with a great number of locations after all, R0is much
smaller than R1. Therefore, it can be justified to assume R0=0 from
an engineering perspective. In this way, the resistance we
measured should be R1.
Times of comparing tests in different environments and different
occasions with the traditional method proved that the above
assumption is entirely reasonable.
2. Limited Point Grounding System
This is also quite common. For example, in some towers, five
towers are linked with each other through overhead ground wire;
Besides, the grounding of some of the buildings is not an
independent grounding grid, but several grounding bodies
connected with each other through the wire.
Under such circumstances, the above R0regarded as 0, will yield
more error on the results of the measurement.
Due to the same reasons mentioned above, we may ignore the
impact of the mutual resistance; and the equivalent resistance of
the grounding resistance paralleled is calculated by the usual
sense. Thus, for the grounding system of N (N is smaller, but larger
than 2) grounding bodies, it can offer N equations:

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.
.
.
Where: R1、R2、……RN are grounding resistances of N grounding
bodies.
R1T、R2T、……RNT are the resistances measured with the
Meter in the different grounding branches.
It is nonlinear equations with N unknown numbers and N equations.
It indeed has a definite solution, but it is very difficult to solve the
issue artificially, even impossible when N is larger.
Therefore, you’re expected to buy the Limited-Point Grounding
System Solution software produced by our company. Users can
use the office computer or notebook computer to carry out
solutions.
In principle, in addition to ignoring the mutual resistance, this
method does not have the measurement error caused by
neglecting R0.
NT
N
NR
RRR
R


)1(21
1
......
11 1
R1T
RN
R3
R2
R1
1
......
1
1
1





T
N
R
RRR
R2
31
21
......
11 1



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However, users need to pay attention to that: in response to the
number of the grounding bodies mutually linked in your grounding
system, it is necessary to measure the same number of the testing
values for calculating of the program, not more or less. And the
program would output the same number of grounding resistance
values.
3. Single-Point Grounding System
From the measuring principle, EARTH TESTER series Meter can
only measure the loop resistance, and the single-point grounding is
not measured. However, users will be able to use a testing line
very near to the earth electrode of the grounding system to
artificially create a loop for testing. The following presented is two
kinds of methods for the single-point grounding measurement by
use of the Meter. These two methods can be applied to the
occasions beyond the reach of the traditional voltage-current
testing methods.
⑴.Two-Point Method
As shown in the figure below, in the vicinity of the measured
grounding body RA, find an independent grounding body of better
grounding state RB (for example, near a water pipe or a building).
RAand RBline will connect to each other using a single testing line.