Besantek BST-ET16 User manual

BESANTEK GROUND TESTER

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

     

  ., .'
 
 120
MANUAL
Besantek Corporation
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com

CONTENT
I.Attention ...................................................................................... 1
II. Brief Introduction........................................................................ 2
III. Specification.............................................................................. 3
1．Model................................................................................. 3
2. Ranges and Accuracy of Measurement.............................. 3
3. Specifications...................................................................... 4
IV. Structure of Meter...................................................................... 5
V. Liquid Crystal Display................................................................. 6
1. LCD Screen......................................................................... 6
2. Description of Special Symbols.......................................... 6
3. Examples Illustrated............................................................ 7
VI. Operating Method..................................................................... 8
1.Boot up................................................................................. 8
2．Shutdown........................................................................... 9
3．Resistance Measurement ............................................... 10
4．Current Measurement......................................................11
5．Date Lock/Release/Storage .............................................11
6．Data Access..................................................................... 12
7．Alarm Settings................................................................. 12
8．Access to Alarm Critical Value ........................................ 13
9．Clear Data ....................................................................... 13

VII. Measurement Principle.......................................................... 13
1. Principle of Resistance Measurement.............................. 13
2. Principle of Current Measurement.................................... 14
Ⅷ. Measurement Method of Earth Resistance............................ 14
1. Multi-Point Grounding System.......................................... 14
2. Limited Point Grounding System...................................... 15
3. Single-Point Grounding System........................................ 16
Ⅸ. Bill of Loading......................................................................... 18
Ⅹ. Parts List and Assembly Details............................................. 19
1. Parts List........................................................................... 19
2. Assembly Details............................................................... 20
Ⅺ.Trouble shooting...................................................................... 21

-1-
I. Attention
Thank you for purchasing this ground tester from our company. In
order to make better use of the product, please be certain:
----To read this user manual carefully.
----To comply with the operating cautions presented in
this manual.
1 Under any circumstances, use the Meter should pay special
attention to safety.
2 Pay attention to the measurement range of the Meter and the
using environment provided.
3 Pay attention to the text labeled on the panel and back plane
of the Meter.
4 Before booting up, the trigger should be pressed for 1-2 times
to ensure the jaws are well closed.
5 At Boot time, DO NOT press the trigger, nor clamp any wire.
6 Before the auto inspection is completed and the "OL Ω"
symbols are showed, the measured objects cannot be
clamped on.
7 The jaw planes contact must be maintained clean, and should
not be polished with corrosive and rough materials.
8 Avoid any impact onto this Meter, especially the Jaw contact
surface.
9 This Meter will have some buzzing sound in measurement
process, and it is normal.
10 The measurement current of the wire should not exceed the
upper limit of the Meter.
11 Please take out the batteries in the case of the Meter being
idle for a long time.
12 The dismantling, calibration and maintenance the Meter shall
be operated by the authorized staff.
13 If the continuing use of it would be dangerous, the Meter
should be stopped using immediately, and immediately sealed
for the treatment by the authorized agencies.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com

-2-
II. Brief Introduction
Its performance is mainly reflected in:
Breakthrough in self-test the boot a long time to wait, start
immediately into the test.
Breakthrough relay self-test mode, using the most
advanced processing algorithms and digital integration
technology, a fully intelligent.
Break the old product to heavy issues, more in line with
characteristics of handheld devices.
New design, panel operation with 6 buttons, better
performance.
An increase of sound and light alarm, "beep—beep--beep
--" alarm sound.
Increase the interference signal recognition indicator.
Improved anti-jamming capability and test stability.
Stored data: 99 Units.
Wider range: 0.01Ω-1200Ω
Lower power consumption: Maximum operating current
not exceeding 50mA.
The ground tester is widely used in the grounding resistance
measurement of the power, telecommunications, meteorology,
oilfield, construction and the industrial and electrical equipment. In
the measurement of a grounding system with loop current, does
not require breaking down the grounding wire, and need no
auxiliary electrode. It is safe, fast and simple in use.
The ground tester can measure out the faults beyond the
reach of the traditional methods, and can be applied in the
occasions not in the range of the traditional methods.
The ground tester can measure the integrated value of the
grounding body resistance and the grounding lead resistance.

-3-
III. Specification
1．Model
Model Jaw
specification Range of measurement Range of current Storage function Alarm function
BST-ET16 65mm×32mm 0.01Ω-1200Ω 0.0mA-20.0A 99 Units √
BST-ET17 φ32mm 0.01Ω-1200Ω 0.0mA-20.0A 99 Units √
BST-ET18 65mm×32mm 0.01Ω-1200Ω 0.0mA-30.0A 99 Units √
BST-ET19 φ32mm 0.01Ω-1200Ω 0.0mA-30.0A 99 Units √
Note: “√” means available.
2. 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-1200Ω 30Ω ±（25%＋30Ω）
Current
(True-RMS)
0.00mA -9.00mA 0.05mA ±（2.5%＋2mA）
10.0mA -99.0mA 0.1mA ±（2.5%＋10mA）
100mA -300mA 1mA ±（2.5%＋20mA）
0.30A-2.99A 0.01A ±（2.5%＋0.1A）
3.0A-9.9A 0.1A ±（2.5%＋0.5A）
10.0A-20.0A 0.1 A ±（2.5%＋1 A）
20.0A-30.0A 0.1 A ±（2.5%＋1 A）
Resistance Measurement Frequency: ＞1KHz
Measured Current Frequency: 50Hz/60Hz
Setting Range of Resistance Alarm Critical Value: 1Ω-199Ω
Setting Range of Current Alarm Critical Value：1mA -499Ma

3. Specifications
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-4-
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com

-5-
IV. Structure of Meter
1. Long Pincers Jaw : 65mmx32mm
2. Round Pincer Jaw : φ32mm
3. Trigger: to control opening and closing of jaw
4. HOLD Key: lock / Release display / Storage
5. ON/OFF Key: Boot Up / Shutdown /Quit /Clear Data
6. MEM Key: Data Access / Clear Data
7. AL Alarm Function Key: Alarm Open / Turn Off / Alarm Critical
Value Setting
8. Resistance Measure Switch Key Ω (Right Arrow Key)
9. Current Measure Switch Key A (Left Arrow Key)
10. Liquid Crystal Display (LCD)

-15-
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:
.
.
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.
NT
N
NR
RRR
R


)1(21
1
......
11 1
R
1T
R
N
R
3
R
2
R
1
1
......
1
1
1





T
N
R
RRR
R2
31
21
......
11 1



-16-
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 this 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.
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, the tester 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.

-17
As the resistance value measured by the Meter is the value of the
series resistance from the testing line and two grounding
resistances.
RT=RA+ RB + RL
Where: RT is the resistance value measured with the Meter.
RLis the resistance value of the testing line. Meter can
measure out the resistance value by connecting the test lines with
both ends.
So, if the measurement value of the Meter is smaller than the
allowable value of the grounding resistance, then the two
grounding bodies are qualified for grounding resistance.
(2) Three-Point Method
As shown in the figure below, in the vicinity of the measured
grounding body RA, find two independent grounding bodies of
better grounding state RB and RC.
First, link RA and RBwith a test line; use the Meter to get the first
reading R1.
Second, have RBand RClinked up, as shown i the following figure.
Use the Meter to get the second reading R2.
Third, have RCand RA linked up, as shown in the following figure.
Use the Meter to get the third reading R3.