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5-6  Earth resistance measurement: 2-pole method

In the 2-pole method, very low earth resistance is used instead 

of the auxiliary earth electrode. It is metal pipes such as water 

supply, neutral wire of commercial power supply, etc. The display 

value in this method stands by following formula.

RE (display value) = Rx(earth resistance) + re(Low Earth resistance)

If you know Low Earth resistance (re), subtract it from reading and 

find the true value.

Rx = RE – re

5-6-1  Preparation

Optional accessory TL-68 is required.

①

Verify no voltage is exited on the Low Earth resistance.

②

Connect the black plug into E terminal, TL-68 is connected into

S(P) and H(C) terminals.

③

Clip black test lead on E and TL-68 on the Low Earth resistance.

EARTH TESTER

PDR4000

POWER

REL

HOLD

TEST

ACV

40Ω

400Ω

4000Ω

>

2s

AUTO POWER OFF

TEST OUT PUT

CAT.III 300V

CAT.II 400V

ACV 400V

MAX

E

S

(

P)

H

(

C)

Earth

Earth

Black

Black

TL-68

TL-68

Rx

Rx

re

re

Low Earth resistance

Low Earth resistance

5-6-2  Measurement

Before measurement, make sure that sensitivity of leakage 

circuit breaker is large enough against 2 mA, which is 

maximum measuring current of the tester.

①

Set the function to 40 Ω/400 Ω/4000 Ω.

②

Press the TEST button to make earth resistance measurement.

During the measurement, LED indicator lights and

symbol 

turns on.

③

Press the TEST button again to stop the measurement.

Explanation when displaying values   other than numbers

• In case of overload, the display is "O.L.".

CAUTION

Содержание PDR4000

Страница 1: ...PDR4000 EARTH TESTER INSTRUCTION MANUAL ...

Страница 2: ...utton 4 4 4 Backlight function HOLD button 5 4 5 Relative value function REL button 5 4 6 Auto Power Off APO function 5 4 7 Low battery indication 5 5 MEASUREMENT PROCEDURE 5 1 Start up Inspection 6 5 2 Interference voltage measurement ACV 6 5 3 Principles of earth resistance measurement 7 5 4 Zero adjustment 7 5 5 Earth resistance measurement 3 pole method 8 5 6 Earth resistance measurement 2 pol...

Страница 3: ...ched to the product Symbol soliciting reference to this manual before use Do not touch this part because a dangerous high voltage is applied Double or enhanced insulation 1 2 Warning Instructions for Safe Use The following instructions are intended to prevent personal injury such as burn and electric shock Be sure to follow them when using the tester 1 Although the tester is equipped with the volt...

Страница 4: ...ed at least once a year 14 Wear insulating protective gear when using the tester with equipment containing a hazardous live part Also be sure to observe your local and national safety rules 15 Always use the tester in a specified method to prevent the protective function from being imperiled 1 3 Overload Protection Input Values Function Input terminals Max rated input value Max overload protection...

Страница 5: ...the distributor and the circuit from the distributor to the mains socket CAT IV Circuit from the leading wire to the distributor 3 NAMES OF COMPONENT UNITS 3 1 MAIN Unit EARTH TESTER PDR4000 POWER REL HOLD TEST ACV 40Ω 400Ω 4000Ω 2s AUTO POWER OFF TEST OUT PUT CAT III 300V CAT II 400V ACV 400V MAX E S P H C Black Blue Red Input terminals LED indicator ACV function HOLD Back Light TEST REL Power Ω ...

Страница 6: ...istance measurement in 40 Ω 400 Ω and 4000 Ω function The measurement of the ACV function is possible without using the TEST button 4 3 Data Hold function HOLD button When the HOLD button is pressed the current display is hold on the display with the symbol The display will not be changed even when the input varies thereafter Press the button again to cancel the Data Hold function and turn off the...

Страница 7: ...n about 10 minutes after the last operation To turn on the tester press POWER button To disable this function press and hold the TEST button when power on the tester symbol turns off in the display The Auto Power Off function is automatically canceled during earth resistance measurement 4 7 Low battery indication When the voltage of the batteries drops below about 7 8 V the symbol turns on the dis...

Страница 8: ...may be exhausted totally Also check that the tester and your hands are not moistened by water etc 5 2 Interference voltage measurement ACV Function Measurement range Accuracy Remarks ACV 0 0 400 0 V 2 rdg 3 dgt OL indicates on the display when 400 0 voltage or more input The accuracy guaranteed 40 500 Hz Procedure Connect the black test lead plug into E terminal and blue test lead plug into S P te...

Страница 9: ...hen the earth system is known or there is an known earth resistance which is very low against object to measure Note Optional accessory TL 68 is required for 2 pole method 5 4 Zero adjustment Before earth resistance measurement set zero 0 00 Ω reading to cancel resistance of test leads Procedure Set the function to 40 Ω Connect the black plug into E terminal blue plug into S P terminal and red plu...

Страница 10: ...a place where there are many pebbles sandy lands dry place please add water and damp it On the concrete lay the auxiliary earth electrode and measure it with water and a damp cloth But asphalt can not be measured because water does not penetrate If the auxiliary earth electrode resistance is too high to measure add water to it insert deeper clean it If it does not decrease due to the characteristi...

Страница 11: ...isplay is If there is no measuring current due to disconnection of E and H C the display will be It will give unstable reading when S P is disconnection If you replace S P and H C on the terminal you may notice connection failure If the indication is rework to place auxiliary earth electrode into the ground again See 5 5 1 Also may be displayed when turns on the display When the measurement is ove...

Страница 12: ...nected into S P and H C terminals Clip black test lead on E and TL 68 on the Low Earth resistance EARTH TESTER PDR4000 POWER REL HOLD TEST ACV 40Ω 400Ω 4000Ω 2s AUTO POWER OFF TEST OUT PUT CAT III 300V CAT II 400V ACV 400V MAX E S P H C Earth Earth Black Black TL 68 TL 68 Rx Rx re re Low Earth resistance Low Earth resistance 5 6 2 Measurement Before measurement make sure that sensitivity of leakag...

Страница 13: ...ipment and have it repaired 6 2 Calibration The manufacturer may conduct the calibration and inspection For more information please contact the dealers 6 3 Cleaning and storage 1 The main unit is not resistant to volatile solvent and must not be cleaned with lacquer thinner or alcohol If it gets dirty wipe lightly with a soft cloth moistened with a small amount of water 2 The main unit is not resi...

Страница 14: ...id retaining screw until it turns idle Press and push the battery lid as illustrated and then remove it Replace the six batteries by taking care of the polarity Attach the battery lid and secure the retaining screw 7 AFTER SALE SERVICE 7 1 Warranty and Provision Sanwa offers comprehensive warranty services to its end users and to its product resellers Under Sanwa s general warranty policy each ins...

Страница 15: ...cation or dropping after the purchase 7 2 Repair Customers are asked to provide the following information when requesting services 1 Customer name address and contact information 2 Description of problem 3 Description of product configuration 4 Model Number 5 Product Serial Number 6 Proof of Date of Purchase 7 Where you purchased the product Please contact Sanwa authorized agent distributor servic...

Страница 16: ...ired To ensure the safety of the product during transportation place the product in a box that is larger than the product 5 times or more in volume and fill cushion materials fully and then clearly mark Repair Product Enclosed on the box surface The cost of sending and returning the product shall be borne by the customer 7 3 SANWA web site http www sanwa meter co jp E mail exp_sales sanwa meter co...

Страница 17: ... measurement at 5000 V approx 1 8 MΩ Possible number of measurements 4000 times 3 pole method measure 10 Ω 5 seconds continuous 25 seconds interval Dimensions mass 163 H 102 W 50 D approx 440 g incl batteries Year of production Initial 2 digits of the main unit serial No indicate the last two digits of year 20 IP rate IP30 Standard IEC61010 1 CAT II 400 V III 300 V IEC61010 2 030 IEC61010 2 033 IE...

Страница 18: ...rference voltage 0 V Specific uncertainty A Function Measurement range Accuracy 40 Ω 0 00 10 00 2 0 rdg 10 dgt 10 01 40 00 Ω 2 0 rdg 3 dgt 400 Ω 0 0 400 0 Ω 4000 Ω 0 3000 Ω 3001 4000 Ω Out of accuracy guaranteed Measuring frequency 820 Hz Measuring current at the short circuit approx 2 mA Accuracy guaranteed Resistance of Auxiliary earth electrode below approx 12 kΩ Accuracy calculation method Exa...

Страница 19: ...n En by the uncertainty from operating condition The maximum operating uncertainty should be within 30 Condition and Ranges under the maximum operating uncertainty Significant parameter Ranges E1 Position Horizontal 90 E2 Supply voltage Before turns on E3 Temperature 0 ºC 40 ºC E4 Series interference voltage 0 10 V 50 60 Hz 3 V 400 Hz 6 V DCV E5 Resistance of electrodes and auxiliary earth electro...

Страница 20: ...01 1803 2040 6009 Dempa Bldg 4 4 Sotokanda 2 Chome Chiyoda ku Tokyo 101 0021 Japan ...

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