Amprobe Telaris-Earth-Test, Earth-Resistance-Tester User Manual [en, de, fr, es, it]

EARTH-TEST

Series

Earth Resistance Tester

Users Manual

• Bedienungshandbuch

• Mode d’emploi

• Manual de instrucciones

• Istruzioni d'uso

2

EARTH-TEST

Series
Earth Resistance Tester

Users Manual

l a u n a M s r e s U

©2007 Amprobe

Contents ............................................................................................................................Page

Limited Warranty and Limitation of Liability..................................................................3

Repair ................................................................................................................................3

In-Warranty Repairs and Replacement – All Countries....................................................3

Non-Warranty Repairs and Replacement – US and Canada ............................................4

Non-Warranty Repairs and Replacement – Europe ........................................................4

References marked on instrument or in instruction manual:..........................................5

Introduction/ Contents ......................................................................................................6

Transport and Storage ......................................................................................................6

Operator´s Safety ..............................................................................................................7

Appropriate Usage ............................................................................................................7

General Information concerning Earth Measurement ..................................................8

Technical Terms ..................................................................................................................9

Product Description ..........................................................................................................10

Commissioning ..................................................................................................................12

Earth Resistance Measurement (two-wire method) ......................................................13

Earth Resistance Measurement (three-wire method) ....................................................14

Earth Resistance Measurement (four-wire method)......................................................16

Measurement of the Specific Earth resistance in accordance

with the 'Wenner' method ..............................................................................................17

Display Indications ............................................................................................................19

Energy Management ........................................................................................................20

Maintenance ......................................................................................................................20

Cleaning ............................................................................................................................20

Battery Replacement ........................................................................................................20

Calibration Interval............................................................................................................21

Technical Data ..................................................................................................................22

2

Limited Warranty and Limitation of Liability

Your Amprobe product will be free from defects in material and workmanship for 2 years
from the date of purchase. This warranty does not cover fuses, disposable batteries or damage
from accident, neglect, misuse, alteration, contamination, or abnormal conditions of
operation or handling. Resellers are not authorized to extend any other warranty on
Amprobe’s behalf. To obtain service during the warranty period, return the product with
proof of purchase to an authorized Amprobe Service Center or to an Amprobe dealer or
distributor. See Repair Section for details. THIS WARRANTY IS YOUR ONLY REMEDY. ALL
OTHER WARRANTIES - WHETHER EXPRESS, IMPLIED OR STAUTORY - INCLUDING IMPLIED
WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY, ARE HEREBY
DISCLAIMED. MANUFACTURER SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT,
INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES, ARISING FROM ANY CAUSE OR
THEORY. Since some states or countries do not allow the exclusion or limitation of an implied
warranty or of incidental or consequential damages, this limitation of liability may not apply
to you.

Repair

All test tools returned for warranty or non-warranty repair or for calibration should be
accompanied by the following: your name, company’s name, address, telephone number, and
proof of purchase. Additionally, please include a brief description of the problem or the
service requested and include the test leads with the meter. Non-warranty repair or
replacement charges should be remitted in the form of a check, a money order, credit card
with expiration date, or a purchase order made payable to Amprobe.

In-Warranty Repairs and Replacement – All Countries

Please read the warranty statement and check your battery before requesting repair. During
the warranty period any defective test tool can be returned to your Amprobe distributor for
an exchange for the same or like product. Please check the “Where to Buy” section on
www.amprobe.eu for a list of distributors near you. Additionally, in the United States and
Canada In-Warranty repair and replacement units can also be sent to a Amprobe Service
Center (see next page for address).

3

Non-Warranty Repairs and Replacement – US and Canada

Non-warranty repairs in the United States and Canada should be sent to a Amprobe Service
Center. Call Amprobe or inquire at your point of purchase for current repair and replacement
rates.

In USA In Canada
Amprobe Test Tools Amprobe Test Tools
Everett, WA 98203 Mississauga, ON L4Z 1X9
Tel: [phone] Tel: [phone]
Fax: [phone] Fax: [phone]

Non-Warranty Repairs and Replacement – Europe

European non-warranty units can be replaced by your Amprobe distributor for a nominal
charge. Please check the “Where to Buy” section on www.amprobe.eu for a list of distributors
near you.

European Correspondence Address
BEHA-AMPROBE GmbH
In den Engematten 14
79286 Glottertal
Germany
Tel. [phone] - 0
Fax. [phone] - 410
www.amprobe.eu
[e-mail]

4

References marked on instrument or in instruction manual:

Warning of a potential danger, comply with instruction manual.

Reference. Please use utmost attention.

Caution! Dangerous voltage. Danger of electrical shock.

Continuous double or reinforced insulation complies with Category II IEC 61140.

Symbol for the marking of electrical and electronic equipment (WEEE Directive
2002/96/EC).

Conformity symbol, the instrument complies with the relevant Directives. It
complies with the EMC Directive (89/336/EEC). It also complies with the Low
Voltage Directive (73/23/EEC).

Conforms to relevant Australian standards.

N10140

WARNING

The instruction manual contains information and references necessary for safe operation
and maintenance of the instrument.

Prior to using the instrument (commissioning / assembly) the user is kindly requested to
thoroughly read the instruction manual and comply with it in all sections.

Failure to read the instruction manual or to comply with the warnings and references
contained herein can result in serious bodily injury or instrument damage.

5

Introduction/ Contents

You have purchased a high quality measurement instrument of BEHA-AMPROBE GmbH which
will allow you to carry out measurement over a long time period.
The Amprobe EARTH-TEST is a handy test and measurement instrument for testing
Earthresistance. The Amprobe EARTH-TEST is characterised by the following features:

• Determination of earth resistance or specific earth resistance

• 2, 3, and 4-wire measurements possible

• Measurement of specific earth resistance measurement in compliance with the Wenner

method

• Measurement current of approx. 10mA

• Display and monitoring of both auxiliary earth and probe resistances

• Displays the actual test current to further enhance and control measurement quality

• Probe and auxiliary ground resistance up to 50 kΩ

• Noise voltage detection

• Two measurement frequencies for noise voltage suppression

• Automatically optimised measurement frequency selection

• Pre-selection of maximum admissible contact voltage: VL 25 or 50 V

• Large, visible LC-display

• Energy management

• Built in accordance with EN61557-5, IEC61557-5

Contents:

1 pc EARTH-TEST
1 pc test lead, black
1 pc test lead, blue
1 pc crocodile clamps, black
1 pc crocodile clamps, blue
1 pc carrying holster
6 pc batteries 1.5V Mignon Type IEC LR6 (Size AA)
1 pc instruction manual

Transport and Storage

• Please keep the original packaging for later transport, e.g. for calibration. Any transport
damage due to faulty packaging will be excluded from warranty claims.

• In order to avoid instrument damage, it is advised to remove batteries when not using the
instrument over a certain time period. However, should the instrument be contaminated
by leaking battery cells, you are kindly requested to return it to the factory for cleaning and
inspection.

• Instruments must be stored in dry and closed areas. In the case of an instrument being
transported in extreme temperatures, a recovery time of at least 2 hours is required prior
to instrument operation.

6

Operator´s Safety

WARNING

The Amprobe EARTH-TEST has been designed and checked in accordance with the safety
regulations for Electronic test and Measurement and left our factory in a safe and perfect
condition. In order to maintain this condition and to ensure safe operation, the operator must
respect the references and warnings contained in this instruction manual.

• The respective accident prevention regulations established by the professional associations
for electrical systems and equipment must be strictly met at all times.

• Measurements in dangerous proximity of electrical installations are only to be executed
when instructed by a responsible electrical specialist, and never alone.

• Prior to usage, inspect instrument and test leads for external damage.Prior to any
operation, ensure that the connecting leads used and the instrument are both in perfect
condition.

• If the operator’s safety can no longer be guaranteed, the instrument is to be put out of
service and protected against use. The safety is no longer guaranteed, if theinstrument:

• shows obvious damage

• does not carry out the desired measurements

• has been stored for too long under unfavourable conditions

• has been subjected to mechanical stress during transport.

• The instrument may only be used within the operating ranges as specified in the technical
data section.

• Avoid any heating up of the instrument by direct sunlight to ensure perfect functioning and
long instrument life.

• The instrument may only be connected to voltage free earth connectors!

Appropriate Usage

WARNING

• The instrument may only be used under those conditions and for those purposes for which
it was built. For this reason, the safety references (chapter 3.0),as well as the technical data
including environmental conditions (chapter 15.0) must be followed at all times.

• The operational safety of the instrument is no longer guaranteedafter unauthorised
modifications or changes.

• Service and maintenance may only be carried out by an authorised service technician.

7

General Information concerning Earth Measurement

The earth resistance is the resistance between reference earth and the connecting point of
the earthing system. The earthing system is required to bring each system parts and circuits
to a reference potential as close as possible to the reference earth. It is recommended to
perform earth measurements in systems as lightning protection, telecommunication and
tank parks.

The built-in earth measurement of the Amprobe EARTH-TEST is an earth resistance
measurement in accordance with the voltage/current measurement method. The power is
supplied by the built-in batteries. The earth resistance is determined in accordance with the
voltage/current measurement method. Earthing represents an essential part of a power
supply system. Earthing is required to bring the individual system parts and current circuits
to a common reference potential close to the reference earth. Earthing is also used to protect
systems from overvoltage or short-circuit currents.

The earth resistance must be of sufficiently low Ohm. The limit values are defined within
national or international standards. Earthing or earth resistance is comprised of the earth
conductor (equipotential bonding conductor or PE), the earth (foundation earth, rod earth,
band earth...), and the earth spreading resistance, i.e. the resistance between earth and
reference earth. A voltage funnel is formed around any earth depending on the earth shape
and the surrounding soil. Assuming that the soil is uniform throughout with a uniform
temperature as well as uniform humidity, the voltage funnels around the earth are of
concentric shape.

The lower the earth resistance, the smaller the voltage funnels. When determining the earth
resistance, the voltage drop is measured which has been generated by a known and constant
current applied to the earth resistance to be measured.

Influence on Measurement Accuracy

The instrument Amprobe EARTH-TEST offers the option to set a maximum measurement
voltage using the UL 25/50V key. The contact voltage limit for medical or agricultural
applications should be set to 25V. For all other applications, it is advised to set the limit to 50V.

The measurement current supplied by the instrument is above 10mA, thus ensuring a precise
measurement result. If, due to the total earthing resistance caused by the voltage which is
generated by the measurement current, the pre-set contact voltage limit of 25V is reached,
the measurement is only carried out at the current present at the contact voltage limit. If the
50V contact voltage limit has been selected the measurement current up to 50V is not limited.
For any measurement voltages exceeding 50V, the measurement current is limited to 3mA.
Thus, a precise measurement result at a sufficiently high measurement current is obtained,
even when encountering difficult measurement conditions, e.g. stony soils.

8

Noise voltages present at ground connections may influence the measurement result. Noise
voltage influence is very low for the instrument EARTH-TEST. A precise filter suppresses all
interference whose frequencies are different with respect to the respective measurement
frequency. Together with the possibility to choose between two measurement frequencies,
best measurement results can be guaranteed. During automatic frequency selection mode,
EARTH-TEST selects the measurement frequency with the lowest, measured interference
voltage. Only use manual frequency selection, if the noise frequency is known. If noise
voltages are present influencing the measurement result in spite of the filter, this condition
is shown by displaying "Unoise". Further influence on measurement accuracy is emitted by
ratios RH/RE and RS/RE, or absolute value of RH and RS. If the ratio RH/RE (RS/RE) exceeds the
value 1000/1 (10000/1), the measurement accuracy indicated in the technical data section does
no longer apply for the Amprobe EARTH-TEST. This is caused by the fact that the voltage to
be measured only amounts to 1/1000 (1/10000) of the voltage present within the
measurement circuit. If the ratio RH/RE (RS/RE) becomes excessive, " Limit RH “RS“ is
shown in the display. The user should try to realise a better ground connection or earth rod
contact to the surrounding earth (e.g. inserting earth rods deeper into the ground, humid
earth or use earth rods parallel around earth rods).

Te chnical Terms:

Earth (E): The ground is a conductor within the earth or a

foundation being in conductive connection with the
earth (e.g. a foundation ground in concrete).

Earth probe (ES) Connector of earth rod next to the earth connecter.

Reference ground: An area of the earth that is sufficiently distant from the

respective ground such that no noticeable voltages,
caused by the grounding current, occur at any point
within this range.

Auxiliary earth electrode (H): Additional earth probe leading the measurement current

for measurement purposes.

Probe (S): An additional earth probe, preferably an earth rod,

which is used as a potential for the reference earth for
measurement purposes.

Spreading resistance of a earth: The resistance of the earth between earth and reference

earth.

9

Product Description

Indications in Display

(Also refer to display indications):

1) Symbol for Limit exceeding

2) Limit: Display at auxillary earth/ Probe-Error
Probe: Probe-Error
Unoise: external voltage

3) Battery indication

4) Indication of units, depending on the selection made (8)

5) Frequency indication
f1=127Hz/ f2=140Hz

6) Automatic/manual frequency selection

7) Contact voltage limit

8) Measurement indication

Control Elements

9) Connecting sockets for test leads:
Auxillary earth (H) black
Probe (S) yellow
Earth probe (ES) red
Earth (E) blue

10) LC Display

11) Key “UL“ for contact voltage: 50V/ 25V

12) Key “f1/f2“ for manual frequency selection:
f1=127Hz/ f2=140Hz

13) Measurement selection switch

14) Key “Start“

15) Battery case instrument (back side)

16) Key “auto/man“ automatic/ manual frequency selection

17) Key “Display“ for display of:
RE - earth resistance
RH - auxiliary earth resistance
RS - probe resistance
IM- measurement current

10

1

2 3

15

17

16

4

7

56

9

10

11

12

11

13

14

15

Commissioning

WARNING

• Measurements in dangerous proximity of electrical installations are only to be executed

when instructed by a responsible electrical specialist, and never alone.

• To perform this measurement the user requires the Earth Measurement Set (option).

• The instrument may only be connected to voltage-free earth connectors.

• Prior to inserting grounds or rods, check the soil for possible dangerous objects present

(pipes, conductors, etc.).

• If a voltage exceeding approx. 5V AC/DC is present at the test leads, the warning message

'Unoise' is displayed.

• To avoid faulty measurements, installed metal pipes, cables in the ground, or in open area

underground waterways or roots must be taken into account. Additionally, the specific
ground resistance is subject to seasonal weather-related variations.

12

Earth Resistance Measurement (two-wire method)

The two-wire method consists of measuring the resistance between the earth under test and
a known earth. For this purpose, the PEN conductor of a TN system can be used, for example.
The resistance of the known earth connection has to be subtracted from the measurement
result. This measurement is also feasible in a densely populated or in sealed areas where rods
and auxiliary earth connections may not be installed.

E

PEN

RE

Figure 3: two-wire method

1) Connect earth to be tested with socket (E) and known earth with socket (H), also refer
to fig. 3

2) Turn the rotary switch (13) to the "2 pole" position.

3) Set contact voltage (11) by using key “UL“.

4) If required choose manual frequency selection by using key “auto/man” (16), and
select test frequency with key “f1/f2” (12).

5) Press key "Start" (14).

6) Read the measurement result from the display.

• Also refer to display indication

• After the measurement, selection can be made between display of earth resistance or

measurement current (IM) by using key “Display“(8), depending on the measurement result.

• Possibility to measure conventional resistance by using the grounding resistance

measurement range. For this purpose, connect test leads E and H to the DUT. Test current
is fed via lines E and H, measurement voltage is measured via E and H.

RPEN

13

Earth Resistance Measurement (three-wire method)

• To perform this measurement the user requires the Earth Measurement Set (Cat. No.1048)

WARNING

The three-wire method consists of inserting two earth rods (one auxiliary earth and one
probe) into the soil, at a minimum distance of 20m. This layout can also be realized by
triangular shape. The test current is fed between auxiliary earth and earth. The voltage drop
between earth and probe is measured. The test lead resistance from measurement instrument
to earth is included in the measurement. This measurement is used to determine e.g. earth
resistance of foundation earths, building site earths and lighting protection earth
connections.

H

S

E

Figure 4: three-wire measurement

1) Locate earth rods for auxiliary ground, probe and ground, in one line if possible, as
described in figure 4. The layout can also be realized by triangular shape. Distance
between probe and earth, or probe and auxiliary earth must be at least 20 m. The test
leads should not be parallel to each other and should not cross to avoid couplings.

2) Connect test leads to earth rods acc. figure 4.

3) Select "3 pole" measurement by using measurement selection switch (13).

4) Set contact voltage (11) by using key “UL“ (14).

5) If required choose maunal frequency selection by using key “auto/man” (16), and
select test frequency with key “f1/f2” (12).

6) Press key “Start“ (14)

7) Read measurement result from display.

14

8) To verify the measurement, exchange the connections of probe and auxiliary earth or
move the earth rod for the probe approx. 1...2m towards the earth connector (or
afterwards towards the auxiliary earth) and measure again. If the instrument shows
similar measurement results for all three measurement layouts, the probe is located
outside the voltage funnel generated by earth and auxiliary earth in the reference
earth area.

Are the measurement values not similar the probe could be located inside the voltage funnel.

To avoid this there are two possibilities:
A: increase the distance between earth and auxiliary earth
or,
B: position the earth rod for the probe to one point of the line outside the voltage

funnel, as shown in figure 5, and repeat the measurement.

Figure 5: Voltage funnel

• After the measurement, selection can be made between display of earth resitance (RE),

auxillary resistance (RS) and measurement current (IM) by using key “Display“ (8),
depending on the measurement result.

• The connection sequence must be respected. Otherwise the instrument will not be able to

carry out the measurement and indicates an error message:

• the display "Probe" indicates a connection error of S, E (interruptions, exchange
also with H or E)

• the "Limit IM" display indicates an interruption of the H connectors.

• Also refer to display indications

15

Earth Resistance Measurement (four-wire method)

• To perform this measurement the user requires the Amprobe Earth Measurement Set

The four-wire measurement is applied instead of the three-wire measurement when dealing
with extremely low earth resistances and if the resistance of test lead between instrument
and earth connector interfere the measurement result.

Here, the earth to be measured is connected via the connectors E and ES, the measurement
selection switch is set to "4pol" and a measurement are performed as described.

H

S

ES

E

Figure 6: four-wire measurement

16

Measurement of the Specific Earth resistance in accordance with
the 'Wenner' method

• To perform this measurement the user requires the Amprobe Earth Measurement Set

To calculate the spreading resistance of earths and earthing systems the specific earth
resistance must be determined. To calculate the specific earth resistance, the measured earth

resistance is used in the formula: ρ = 2*π*a*RE.

This measurement is performed using four earth rods inserted into the soil to be tested in
one line at the same distance 'a' apart. The four earth rods are inserted into a depth of
maximum 1/5th of the distance 'a'.

The earth resistance is detected up to the depth of the distance 'a'. To avoid faulty
measurements metal pipes, cables in the earth, or in open areas under earth waterways, or
roots installed or located in parallel must be taken into account. Additionally, the specific
earth resistance is subject to seasonal weather-related variations.

H

S

ES

E

Figure 7: Specific Earth resistance measurement

1) Place the four earth rods for E, ES, S, H in one line, in accordance with Figure 7. The
distance between each probes must match the value used in the formula. Carefully
place the test leads making sure that the test leads are not parallel to each other and
do not cross to avoid coupling.

2) Connect test leads to earth rods according to figure 7.

3) Selct “4 pole“ measurement by using selection switch (13).

4) Set contact voltage by using key “UL“ (11).

5) If required choose manual frequency selection by using key “auto/man” (16), and
select test frequency with key “f1/f2” (12).

6) Press key "Start"(14), read measurement result on display.

17

• After the measurement, selection can be made between display of earth resitance (RE),
auxillary resistance (RS) and measurement current (IM) by using key “Display“ (8),
depending on the measurement result.

• The connection sequence must be respected. Otherwise the instrument will not be able to
carry out the measurement and indicates an error message:

• the display "Probe" indicates a connection error of S, E (interruptions, exchange
also with H or E)

• the "Limit IM" display indicates an interruption of the H connection.

• The procedure is carried out a different locations and at respectively varying distances "a".
Thus, the composition of the soil for the desired area is examined. Here, a measurement
at larger distances "a" gives more details about the specific earth resistance in deeper
grounds.

Ta ble 1:

Type of the
Ground

Earth Resistance
Bar Ground Connection

3m deep 5m deep 5m length 10m length

Earth Resistance
Flat Ground Connection

marshy
soil/swamp

arable land/clay 33 Ω 17 Ω 40 Ω 20 Ω

humid sandy soil 66 Ω 33 Ω 80 Ω 40 Ω

dry sandy soil 330 Ω 165 Ω 400 Ω 200 Ω

stony soil 1000 Ω 500 Ω 1200 Ω 60 Ω

concrete1:5 160 Ω 80 Ω

References to evaluate measurement results (in compliance with DIN VDE 0413

Ta ble 2:

Required max. Permissable Resistance Maximum Displayed Test Value

0.3 Ω 0.18 Ω

0.4 Ω 0.28 Ω

0.5 Ω 0.37 Ω

0.6 Ω 0.46 Ω

0.7 Ω 0.56 Ω

0.8 Ω 0.65 Ω

0.9 Ω 0.75 Ω

1.0 Ω 0.84 Ω

2. 0 Ω 1.84 Ω

3.0 Ω 2.79 Ω

4.0 Ω 3.73 Ω

5.0 Ω 4.67 Ω

10 Ω

5 Ω 12 Ω 6 Ω

Example for Table 2: Required max. permissable resistance 1Ω.

Maximum displayed test value on EARTH-TEST 0,84 Ω.

18

Display Indications

Message Cause

Reference to exeeding the limit of a measurement value

Probe

Limit

I

M

Unoise

Limit

RH

Limit

RS

Limit

RE

Limit

Battery­Symbol

Batt-Symbol
is
blinking

Interruption / exchange probe(S) - earth probe (ES) (at 4 pole measurement)
Interruption / exchange probe (S) - earth (E) (at 3 pole measurement)
Interruption auxillary earth (H) - earth (E) (at 2 pole measurement)

Interruption auxillary earth (H) - earth (E) (at 4/3 pole measurement)

External voltage has exceeded admissible value,
Measurement values do not longer correspond to the specifications!

Measurement value RH > 50 kΩ
or RH > 1000 RE
measurement values do not longer correspond to specifications

Measurement value probe resistance (RS) > 50 kΩ
or probe resistance (RS) > 10000 x RE
Measurement values do not longer correspond to specifications!

Measurement value earth resistance (RE) > 2 kΩ (at 4/3 pole measurement)
Displayed measurement values for RH, RS are then RH+RE,RS+RE !

Measurement value R > 2kΩ (at 2 pole measurement)

Batteries are nearly empty. must be changed.
Measurement values do not longer correspond to specifications!

Batteries are complete empty. measurement no longer possible!

19

Energy Management

Approximately 5 minutes after last key operation, the instrument switches off automatically
(auto-power-off). To switch the instrument on again, turn rotary switch from the "OFF"
position to the desired function.
If the batteries are almost completely discharged, the battery symbol (3) appears. The
instrument continues functioning without necessarily respecting the specifications.
If the batteries continue to be used and discharged, the instrument switches off at a point
when the minimum battery voltage level is reached and may not be switched on again.

Maintenance

When using the instrument in compliance with the instruction manual, no special
maintenance is required.

Cleaning

If the instrument is dirty after daily usage, it is advised to clean it by using a damp cloth and
a mild household detergent.

Prior to cleaning, ensure that the instrument is switched off and disconnected all external
circuits.

• Never use acid detergents or dissolvants for cleaning.

Battery Replacement

WARNING

• Prior to battery replacement, disconnect the instrument from all connected measurement

circuits.

• Only use batteries in compliance with the specifications of the technical data section, 1.5 V

type IEC LR6 (Size AA/ Mignon) .

• Never try to disassemble battery cells. Never throw a battery into fire as this could lead to

an explosion. Never expose batteries to humidity

• Please consider your environment when you dispose of your used batteries or accumulators.

They belong in a rubbish dump for hazardous waste. In most cases, the batteries can be
returned to their point of sale.

• Please, comply with the appropriate regulations concerning the return, recycling and

disposal of used batteries and accumulators.

• If an instrument is not used over an extended time period, the batteries must be removed.

Should the instrument be contaminated by leaking battery cells, the instrument has to be
returned for cleaning and inspection to the factory.

20

1) If the battery symbol (3) appears in the display, the batteries must be replaced..

2) Switch off the instrument via the measurement slection switch.

3) Loosen the screws on the instrument rear.

4) Lift the battery case cover (by slightly hitting the instrument in the palm of your hand).

5) Remove the discharged batteries.

6) Insert new batteries and ensure the correct polarity is respected.

7) Replace the battery case cover and retighten the screws.

8) The instrument is now ready for further measurements.

Calibration Interval

We suggest a calibration interval of one year. If the instrument is used very often or if it is used
under rough conditions we recommend shorter intervals. If the instrument is used few times
only the calibration interval can be extended on to 3 years.

21

Technical Data

Display: 3 digit LCD, 1999 digit
Duration of measurement: 3-5s
Measurement principle: current-voltage measurement principle in accordance with

EN61557-5

Measurement voltage: 25V/ 50V selection
Current/power consumption: approx. 10mA/ 0,1W max. 500mA briefly, during measurement
Measurement current: max. 12mA
Frequency (f1/ f2): 127Hz/ 140Hz, selectable

Measurement method: 2 pole/ 3 pole/ 4 pole

Range Tolerance

RE: 0.05 - 2.00 Ohm ±(4% + 0.1 Ohm) ±(6% + 0.1 Ohm)*
RE: 2.00 - 1999 Ohm ±(4% + 2 Digit) ±(6% + 3 Digit)*
RH, RS: 0.1 - 50 kOhm ±(10% + 3 Digit)*
IM: 0.1 - 13mA ±(10% + 3 Digit)*
*operating error

Nominal use range:

Correct polarity: for 3/4 pole measurements
Noise voltage: 0...5V, max. 10% of measurement voltage
aux. earth (RH), probe resis. (RS): max. 50 kOhm
Ratio RH/ RE: max. 1000/1
Ratio RS/ RE: max. 10000/1
Earth resistance (RE): max. 2 kOhm

Reference range:

Correct polarity: for 3/4 pole measurements
Noise voltage: 0 V
aux. earth (RH),
probe resis. (RS) 0 Ohm
Earth resistance (RE): max. 2 kOhm
Auto power off after approx. 5 min
Power supply 6 x 1.5 V Type IEC LR6 (Mignon/Size AA)
Low Bat at 6.6 V ±5 % (OFF at 6.1V ±5 %)
Battery life approx. 1 year for normal use
Dimensions (LxWxD) 235x105x68 mm
Weight approx. 640g (inc. 6 x batteries)

22

Environmental Conditions

Temperature range /
humidity 0°C...40°C / max. 80% at -10°C...40°C
Reference temperature
range: +17°C...+27°C
Storage temperature range -20°C...+60°C
Casing protection class II
Built in accordance with IEC 61557-5, DIN VDE 0413-5, EN 61557-5,
Overvoltage category CAT III / 300V against ground
Pollution degree 2
Protection class: II
Protection degree IP50
Height above MSL. up to 2000m

23

Subject to technical changes without notice!
11/2007 PAEB30872261

24

EARTH-TEST

Series
Earth-Resistance Tester

Bedienungshandbuch

Anleitung

©2007 Amprobe

Inhalt ................................................................................................................................Seite

Beschränkte Gewährleistung und Haftungsbeschränkung ............................................3

Reparatur ..........................................................................................................................3

Auf dem Gerät oder in der Bedienungsanleitung vermerkte Hinweise: ........................5

Einleitung / Lieferumfang ................................................................................................6

Transport und Lagerung....................................................................................................6

Sicherheitsmaßnahmen ....................................................................................................7

Bestimmungsgemäße Verwendung..................................................................................7

Allgemeines zur Erdmessung ..........................................................................................8

Einflüsse auf die Messgenauigkeit....................................................................................8

Begriffe ..............................................................................................................................9

Bedienelemente und Anzeigen ........................................................................................10

Durchführen von Messungen............................................................................................12

Erdungswiderstandsmessung (Zweileitermethode) ......................................................13

Erdungswiderstandsmessung (Dreileitermethode) ........................................................14

Erdungswiderstandsmessung (Vierleitermethode) ........................................................16

Spezifischer Erdwiderstandsmessung

(Vierleitermethode nach Wenner) ..................................................................................17

Anzeigen / Fehlermeldungen............................................................................................19

Energiemanagement ........................................................................................................20

Wartung ............................................................................................................................20

Reinigung ..........................................................................................................................20

Batteriewechsel..................................................................................................................20

Kalibrierintervall................................................................................................................21

Technische Daten ..............................................................................................................22

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Beschränkte Gewährleistung und Haftungsbeschränkung

Es wird gewährleistet, dass dieses Amprobe-Produkt für die Dauer der gesetzlichen Gewähr­leistungspflicht ab dem Kaufdatum frei von Material- und Fertigungsdefekten ist. Diese Ge­währleistung erstreckt sich nicht auf Sicherungen, Einwegbatterien oder Schäden durch Un­fälle, Nachlässigkeit, Missbrauch, Änderungen oder abnormale Betriebsbedingungen bzw.
unsachgemäße Handhabung. Die Verkaufsstellen sind nicht dazu berechtigt, diese Gewähr­leistung im Namen von Amprobe zu erweitern. Um während der Gewährleistungsperiode Ser­viceleistungen zu beanspruchen, das Produkt mit Kaufnachweis an ein autorisiertes AMPRO­BE Service-Center oder an einen Amprobe-Fachhändler/-Distributor einsenden. Einzelheiten
siehe Abschnitt „Reparatur“ oben. DIESE GEWÄHRLEISTUNG STELLT DEN EINZIGEN UND AL­LEINIGEN RECHTSANSPRUCH AUF SCHADENERSATZ DAR. ALLE ANDEREN GEWÄHRLEISTUN­GEN - VERTRAGLICH GEREGELTE ODER GESETZLICHE VORGESCHRIEBENE - EINSCHLIESSLICH
DER GESETZLICHEN GEWÄHRLEISTUNG DER MARKTFÄHIGKEIT UND DER EIGNUNG FÜR EINEN
BESTIMMTEN ZWECK, WERDEN ABGELEHNT DER HERSTELLER ÜBERNIMMT KEINE HAFTUNG
FÜR SPEZIELLE, INDIREKTE, NEBEN- ODER FOLGESCHÄDEN ODER VERLUSTE, DIE AUF BELIEBI­GER URSACHE ODER RECHTSTHEORIE BERUHEN. Weil einige Staaten oder Länder den Aus­schluss oder die Einschränkung einer implizierten Gewährleistung sowie von Begleit- oder Fol­geschäden nicht zulassen, ist diese Gewährleistungsbeschränkung möglicherweise für Sie nicht
gültig.

Reparatur

Zu allen Geräten, die zur Reparatur oder Kalibrierung im Rahmen der Garantie oder
außerhalb der Garantie eingesendet werden, muss folgendes beigelegt werden: Name des
Kunden, Firmenname, Adresse, Telefonnummer und Kaufbeleg. Zusätzlich bitte eine kurze
Beschreibung des Problems oder der gewünschten Wartung sowie die Messleitungen dem
Messgerät beilegen. Die Gebühren für Reparaturen außerhalb der Garantie oder für den Er­satz von Instrumenten müssen als Scheck, Geldanweisung, Kreditkarte (Kreditkartennummer
mit Ablaufdatum) beglichen werden oder es muss ein Auftrag an AMPROBE formuliert wer­den.

Bitte die nachfolgende Garantieerklärung lesen und die Batterie prüfen, bevor Reparaturen
angefordert werden. Während der Garantieperiode können alle defekten Geräte zum Um­tausch gegen dasselbe oder ein ähnliches Produkt an den AMPROBE-Distributor gesendet wer­den. Ein Verzeichnis der zuständigen Distributoren ist im Abschnitt „Where to Buy“ (Ver­kaufsstellen) auf der Website www.amprobe.eu zu finden. Darüber hinaus können in den USA
und in Kanada Geräte an ein AMPROBE Service-Center (Adresse siehe weiter unten) zur Re­paratur oder zum Umtausch eingesendet werden.

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Reparaturen und Austausch außerhalb der Garantie

USA und Kanada Für Reparaturen außerhalb der Garantie in den Vereinigten Staaten und in
Kanada werden die Geräte an ein AMPROBE Service-Center gesendet. Auskunft über die der­zeit geltenden Reparatur- und Austauschgebühren erhalten Sie von AMPROBE oder der Ver­kaufsstelle.

In USA In Canada
Amprobe Test Tools Amprobe Test Tools
Everett, WA 98203 Mississauga, ON L4Z 1X9
Tel: [phone] Tel: [phone]
Fax: [phone] Fax: [phone]

Reparaturen und Austausch außerhalb der Garantie - Europa

Geräte außerhalb der Garantie können durch den zuständigen AMPROBE- Distributor gegen
eine Gebühr ersetzt werden. Ein Verzeichnis der zuständigen Distributoren ist im Abschnitt
„Where to Buy“ (Verkaufsstellen) auf der Website www.amprobe.eu zu finden.

Korrespondenzanschrift für Europa*

BEHA-AMPROBE GmbH
In den Engematten 14
79286 Glottertal
Germany
Tel.: [phone] - 0
Fax: [phone] - 410
www.amprobe.de
[e-mail]

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