Chauvin Arnoux C.A 6423 User manual

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■CONTRÔLEURDETERRE
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■EARTHTESTER
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■ERDUNGSPRÜFER
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■STRUMENTODI CONTROLLO DELLA TERRA
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■CONTROLADORDETIERRA
C.A 6423
北京海洋兴业科技股份有限公司（证券代码：839145）
电话：[phone]
网址：www.hyxyyq.com

14
English
WARRANTY
Unless notified to the contrary, our instruments are guaranteed from any manufacturing
defect or material defect. They do not bear the specification known as the safety specification.
Our guarantee, which may not under any circumstances exceed the amount of the invoiced
price, goes no further than the repair of our faulty equipment, carriage paid to our workshops.
It is applicable for normal use of our instruments, and does not apply to damage or destruction
caused, notably by error in mounting, mechanical accident, faulty maintenance, defective
use, overload or excess voltage.
Our responsability being strictly limited to the pure and simple replacement of the faulty parts
of our equipment, the buyer expressly renounces any attempt to find us responsible for
damages or losses caused directly or indirectly.
Our guarantee is applicable for twelve (12) months after the date on which the
equipment is made available. The repair, modification or replacement of a part during the
guarantee period will not result in this guarantee being extended.
SAFETY IN USE
■Before connecting up the C.A 6423, check that no dangerous voltage is present at the
earth to be measured.
■Before opening the battery compartment, ensure that no measurement lead is connected
to the instrument.
Meaning of symbol: Warning!
Consult the User’s manual before using the instrument.
You have just acquired an Earth Tester and we thank you for your confidence.
To get the best service from your instrument:
-read carefully this user’s manual,
-respect the safety precautions in it,
-stick the label corresponding to your language on the back of the instrument.
北京海洋兴业科技股份有限公司（证券代码：839145）
电话：[phone]
网址：www.hyxyyq.com

15
SUMMARY
Page
1. PRESENTATION ...................................................................................................................................................... 15
2. DESCRIPTION ........................................................................................................................................................... 16
3. OPERATINGMODE .............................................................................................................................................. 17
3.1. Measurement of resistance of an earth point .................................................................. 17
3.2. Measurement of resistance ........................................................................................................... 18
3.3. Fault signals .............................................................................................................................................. 19
4. SPECIFICATIONS ................................................................................................................................................... 20
5. MAINTENANCE ......................................................................................................................................................... 23
5.1. Normal cleaning ..................................................................................................................................... 23
5.2. Calibration check ................................................................................................................................... 24
5.3. Repair ............................................................................................................................................................ 24
6. TOORDER .................................................................................................................................................................... 25
1. PRESENTATION
Autonomous and watertight, this tester is a worksite instrument designed for earth resistance
measurements. It is particularly suited to measurements in difficult conditions such as when
there are stray voltages present, high telluric currents, high value auxiliary electrode
resistances, etc...
For ease of use, this instrument has the following features:
■a single press button to trigger the measurement
■an autoranging system for measurement range switching
■a large digital display which is readable even in shadow
■ three indicators that signal the presence of faults which can lead to errors during measurement
■three colour coded screw terminals to simplify connection of leads
■an attached connection rod
北京海洋兴业科技股份有限公司（证券代码：839145）
电话：[phone]
网址：www.hyxyyq.com

16
2. DESCRIPTION
1Measurement input terminal E (green)
2Measurement input terminal S (blue)
3Measurement input terminal H (red)
4Attached rod S - H for 2 wire resistance measurement
52000 count digital LCD
6Low battery indicator
7Reverse connection indicator
8Current circuit fault indicator (E - H)
9Voltage circuit fault indicator (E - S)
10 Indicator of presence of interference on voltage circuit (E - S)
11 Measurement press button
10 7
9
11
8
1432
6
5
北京海洋兴业科技股份有限公司（证券代码：839145）
电话：[phone]
网址：www.hyxyyq.com

17
3.1 MEASUREMENT OF THE RESISTANCE OF AN EARTH POINT
To measure the resistance of an earth conductor, the so-called "62% method" is in general
recommended. This measurement requires the use of the items in the Earth Kit (see Ch.6:
TO ORDER).
Cut the power supply to the installation and disconnect it from the earth by
opening the earth bar!
1. Connect terminal E to the earth to be measured.
2. Check that the bar 4is not present between terminals S and H.
3. Drive in (completely if possible) the input earth rod H at a distance "a" from the earth point
(E) to be measured.
Note: this distance is further for a deep and extended earth point (larger range of influence).
4. Drive in the rod S at 62% of the distance between the earth E and the rod H (the rods S,
H and the earth point must be in line).
5. Connect the rods to their respective terminals with the leads.
6. Press the "MEASURE" button 11 and hold the button during measurement. Check that
none of the three indicators are flashing, otherwise, check the wiring (see Ch.3.4: FAULT
SIGNALS) and make the measurement again.
Measurement of resistance of earth point
3. OPERATING MODE
E S H
E
earth bar
S
S'' S' H
earth
point
0 % 52 % 62 % 72 % 100 %
北京海洋兴业科技股份有限公司（证券代码：839145）
电话：[phone]
网址：www.hyxyyq.com