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G

SAFETY WARNINGS

Safety Warnings

and 

Precautions must be read

and understood before the instrument is used. They 

must

be observed during use.

Do not

leave the instrument connected to the system under test when not in use.

Circuit connections and exposed metalwork of an installation or equipment under test 

must not

be touched.

The instrument 

must not

be operated or connected to any external system if it shows any visible signs of damage or if it has been stored for prolonged

periods in unfavourable conditions.

The instrument 

must not

be operated or connected to any external system if the battery compartment or casing is open or any parts of the case

(including keypad, selector switch, display window, etc.) are missing.

The earth spikes, test leads and their terminations (including connections to the earthing system under test) 

must not

be touched if an installation earth

fault can arise unless adequate precautions are taken.

The earth spikes, test leads and their terminations (including connections to the earthing system under test) 

must not

be touched while the instrument

is switched on.

Special precautions

are necessary when operating in situations where ‘live’ earths may be encountered: isolation switches and fuses (not supplied with

this instrument) must be used.

Special precautions

are necessary when working near high tension systems (MV and HV): rubber gloves and shoes (not supplied with this instrument)

should be worn.

Special precautions

are necessary when working in wet conditions or in agricultural areas: observe the local safety standards and take all necessary

special precautions applicable to the particular location.

The instrument 

must

be disconnected from the earthing system under test while batteries are being changed or the fuse replaced.

Replacement batteries and fuses 

must

be of the correct type and rating.

2

Users of this equipment and/or their employers are reminded that National Health and Safety Legislation requires them to carry out valid risk assessments of

all electrical work so as to identify potential sources of electrical danger and risk of electrical injury such as inadvertent short circuits. Where the assessments

show that the risk is significant then the use of fused test leads may be appropriate.

NOTE

THE INSTRUMENT MUST ONLY BE USED BY SUITABLY TRAINED AND COMPETENT PERSONS.

Содержание DET3TA

Страница 1: ...M DET3TA DET3TC DET3TD and DET4TD Earth Ground Electrode Testers USER MANUAL...

Страница 2: ...the instrument is switched on Special precautions are necessary when operating in situations where live earths may be encountered isolation switches and fuses not supplied with this instrument must be...

Страница 3: ...iate rubber gloves rubber soled shoes and stand on a rubber mat 2 The P S and C H terminals should be connected through a double pole isolation switch the rating of which will cope with the maximum fa...

Страница 4: ...ent of ground noise voltage 11 Two terminal resistance measurement 12 Three terminal ground rod resistance measurement 12 Four terminal ground rod resistance measurement DET4TD 13 Ground resistance me...

Страница 5: ...tor current The DET variants have the following features Feature DET3TA DET3TC DET3TD DET4TD Automatic C spike check Automatic P spike check Manual P spike check Automatic noise check Manual noise che...

Страница 6: ...tteries and calibration certificate stored in a tough polypropylene carrying case Test lead connections at rear Rc OK Selector switch Resistance measurement settings 2P and 3P Resistance scale Voltage...

Страница 7: ...cator OK or high Current probe resistance OK or high Clamp current indicator OK or low Ground noise voltage indicator OK high Test lead connections at rear of instrument Test lead connections at rear...

Страница 8: ...eir condition is good with no damaged or broken insulation DET4D PREPARATIONS FOR USE ALL INSTRUMENTS Test lead connections at rear of instrument Resistance measurement settings 2P 3P and 4P Selector...

Страница 9: ...FF setting on the selector switch and then switched on as normal Display symbols DET3TC DET3TD DET4TD G Warning Triangle f Fuse Blown Battery Indicator not DET3TA 100V Indicates that the ground noise...

Страница 10: ...coming exhausted To replace batteries Warning Do not operate instrument with the battery cover removed 1 To avoid the possibility of electric shock switch instrument OFF and disconnect the instrument...

Страница 11: ...bol f DET3TD DET3TC and DET4TD Only one fuse is contained within the instrument and is user replaceable When the fuse ruptures symbol will show and testing is inhibited To replace the fuse Warning Do...

Страница 12: ...und noise voltage setting marked V 3 The ground noise voltage reading will be displayed on the LCD display as shown in Figure 3 Figure 3 Ground noise voltage reading Two terminal resistance measuremen...

Страница 13: ...rror the effect can be removed from the measured resistance using the method below 1 With the selector switch in the OFF position connect the instrument as shown in Figure 5 with the lead shown dotted...

Страница 14: ...the resistance measurement will be continually updated and displayed 4 The instrument will then check for ground noise the parameters of the current and voltage circuits and the integrity of the fuse...

Страница 15: ...also allows individual measurement of each rod Measuring ground resistance with the ICLAMP using ART DET3TC Figure 10 Connection for measuring three terminal ground rod resistance 1 With the selector...

Страница 16: ...battery life Ground noise voltage measurement DET3TA Figure 13 Connections for measuring ground noise voltage and two terminal resistance 4 The instrument will then check for ground noise voltage the...

Страница 17: ...the analogue display as shown in Figure 14 Figure 14 Analogue display indicating ground noise voltage measurement Two terminal resistance measurement DET3TA 1 With the selector switch in the OFF posi...

Страница 18: ...ithin acceptable limits as shown in Figure 17a within the Green region on the Rp scale release the Spike button Figure 17a P Spike OK in green zone Figure 17b P Spike NOT OK in red zone 7 Press and ho...

Страница 19: ...guaranteed data Values without tolerances are for information only Resistance Measurement Range 0 01 to 2 000 Accuracy 2 3 digits DET3TC DET3TD DET4TD 2 5 of scale length DET3TA Voltage Measurement Ra...

Страница 20: ...R6 AA 1 5 V Alkaline Rechargeable 8 x 1 2V NiCAD or 8 x 1 2V NiMH Battery life Approx 700 consecutive tests Fuses 500 mA F HBC 50 kA 600 V 32 x 6 mm Weight and Dimensions Weight 1kg all units Dimensio...

Страница 21: ...it is necessary to return an instrument for repair a returns Authorisation number must first be obtained by contacting one of the addresses shown You will be asked to provide key information such as...

Страница 22: ...egger Pty Limited Unit 26 9 Hudson Avenue Castle Hill Sydney NSW 2125 Australia T 61 0 2 9659 2005 F 61 0 2 9659 2201 E ausales megger com Megger Limited 110 Milner Avenue Unit 1 Scarborough Ontario M...

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