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Copyright HT ITALIA 2012

Release EN 2.00 - 04/10/2012

GEO416

GEO416

GS

User manual

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Summary of Contents for GEO416

Page 1: ... Copyright HT ITALIA 2012 Release EN 2 00 04 10 2012 GEO416 GEO416 GS User manual ...

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Page 3: ... measurement 17 5 2 how to cancel one or several measurements 17 5 3 How to recall a measurement 18 6 INSTRUMENT RESET 19 7 INSTRUMENT CONNECTION TO PC 19 8 MAINTENANCE 20 8 1 General 20 8 2 Battery replacement 20 8 3 Instrument cleaning 20 8 4 End of life 20 9 TECHNICAL SPECIFICATIONS 21 9 1 Technical features 21 9 1 1 Reference standards 22 9 1 2 General features 22 9 2 Environment 22 9 2 1 Oper...

Page 4: ...l as on the instrument CAUTION Please read carefully this manual in order to understand the nature of the potential danger and the actions to undertake Refer to the instruction manual An improper use may damage the instrument or its components as well as endanger the user DC or AC voltage and current High voltage danger risk of electric shock Double insulation 1 1 PRELIMINARY INSTRUCTIONS This ins...

Page 5: ...ne what a measurement category usually called over voltage category means Under 6 7 4 Measuring circuits it quotes Circuits are divided into the following measurement categories Measurement category IV is for measurements performed at the source of a low voltage installation Examples are electricity meters and measurements on primary excess current protection devices as well as ripple control unit...

Page 6: ...iately the forwarder or your dealer Make sure that all standard accessories mentioned in the enclosed packing list see 9 3 are included in the packaging In case of discrepancies contact your dealer Should you have to return back the instrument for any reason please follow the instructions mentioned under 10 3 2 POWER SUPPLY The instrument is powered by batteries see 9 1 2 The battery charge is dis...

Page 7: ...cting the required parameters key to turn on the display backlight for 30 seconds ESC key to quit without selecting any mode RCL key to recall data stored in the instrument s memory CLR key to cancel the selected measurements from the instrument s memory GO key to start a measurement SAVE key to store measurements ON OFF key to turn on off the instrument 4 2 MEASURING ACCESSORIES DESCRIPTION CAPTI...

Page 8: ...f all segments for about one second Subsequently the last firmware version as well as the last selected measuring mode are displayed before switching off 4 2 2 Auto power off The instrument automatically turns off 3 minutes after the last key pressing To resume operation turn on the instrument pressing the on off key ...

Page 9: ...ument and to the alligator clips when the latter are not connected to the plant under test Always respect the Hand held area of probe see 4 2 If the length of the supplied cables isn t suitable for the plant under test see 11 You can create your own extensions following indications in 11 2 1 Fig 3 Three wire earth resistance measurement 1 Turn on the instrument pressing the ON OFF key 2 Pressing r...

Page 10: ...d it range between 3 V and 9 V the instrument carries out measurement and displays the symbol indicating the uncertainty decline of the measurement 9 1 10 When the test is over should the earth resistance value be lower than the full scale the instrument emits a double tone indicating the positive outcome of the test and displays the resistance measurement as well as the interfering voltage value ...

Page 11: ...the sake of safety To carry out the test a suitable auxiliary rod is necessary an auxiliary rod is deemed as suitable when its earth resistance is negligible and independent of the earth installation under test In Fig 4 a lamp post is used as auxiliary rod however any metal body driven into the ground can be used provided that the above mentioned requirements are met CAUTION The instrument display...

Page 12: ... pressing the up and down arrow keys select 2W option 3 A screen similar to the one beside appears where the input interfering voltage value of the instrument is displayed Input interfering voltage value 4 Connect the blue red green and black cables to the corresponding instrument s input terminals H S ES E then adding crocodiles if necessary 5 Extend if necessary the blue and red measuring cables...

Page 13: ...le the instrument emits a double tone indicating the positive outcome of the test and displays the resistance measurement as well as the interfering voltage value at the time of measuring Earth resistance measurement Input interfering voltage value CAUTION The resistance measurement is effected with 4 wire volt ampere method without being affected by the resistance value of the cables It is theref...

Page 14: ...not connect the instrument to installations whose voltages exceed the limits indicated in this manual Exceeding such limits may cause electric shock to the user and damage the instrument Always connect the cables to the instrument and to the alligator clips when the latter are not connected to the plant under test Always respect the Hand held area of probe see 4 2 If the length of the supplied cab...

Page 15: ...arrow keys set the desired measuring unit m or ft Measuring unit selected 6 Connect the blue red green and black cables to the corresponding instrument s input terminals H S ES E then adding crocodiles if necessary 7 Extend if necessary the blue and red measuring cables separately using cables with proper section Adding any extension does not require calibration and does not affect the measured gr...

Page 16: ...fering voltage value at the time of measuring Measurement of ground resistivity Value of input interfering voltage and rods distance set CAUTION The resistivity measurement is effected with 4 wire volt ampere method without being affected by the resistance value of the cables It is therefore not necessary to effect compensation of cable resistance or of any extension 13 When the test is over shoul...

Page 17: ... resistance too high Value of input interfering voltage Example for 3W mode terminal H and not driven into a pebbly or scarcely conductive ground In this latter case pour water around the rod to decrease its resistance value 11 2 RC top is displayed when The H rod s resistance RH 50KΩ is summed up to the ampere circuit The resistance of rod H exceeds the value 1200 100 RX Ω where RX is the earth r...

Page 18: ...t the instrument do not perform the test emits a long sound tone and displays the screen beside Too high input interfering voltage at ampere circuit Input interfering voltage value Example under 2W mode 7 When starting a measurement if an interfering voltage higher than 9V is detected at both the ampere and volt circuits inputs the instrument do not perform the test emits a long sound tone and dis...

Page 19: ...ce back the place where the measurement was effected 3 OR Confirm measurement storing pressing SAVE key or ENTER key 5 2 HOW TO CANCEL ONE OR SEVERAL MEASUREMENTS 1 Press RCL key the instrument displays a screen similar to the one beside Number of the last memory location used Values of L and P parameters 2 Press the arrow keys to select the memory location where cancellation of data is to be star...

Page 20: ...strument displays a screen similar to the one beside Number of the last memory location Values of L and P parameters 2 Press the arrow keys to select the memory location whose content is to be displayed Number of the memory location whose content is to be displayed Values of L and P parameters 3 Press the ENTER key to display the measurement stored inside the selected memory location the instrumen...

Page 21: ...e First it s necessary to select the COM port used for the transmission and the correct baud rate 9600 bps To set these parameters install the software and consult the help on line The selected port shall be free of any other device or application such as mouse modem etc CAUTION Optical port emits Laser radiations Don t locate beam at eye level Class 1M laser apparatus according to EN 60825 1 To t...

Page 22: ...displayed the batteries are to be replaced CAUTION Only skilled technicians can open the instrument and replace batteries Before removing batteries disconnect all cables from input terminals 1 Turn off the instrument pressing the ON OFF key for a while 2 Disconnect the cables from the input terminals 3 Remove the battery cover screws and detach the battery cover 4 Replace batteries with new ones o...

Page 23: ... 0 199 9k 0 1k 200 314k 200 314k 1k Measuring frequency 77 5Hz Test current 12mA Open loop voltage 25Vrms Disturbance voltage on ampere and volt circuits the measurement is taken with the stated accuracy if the interfering voltage is 3V while for interfering voltages ranging from 3V and 9V the accuracy decreases progressively with an interfering voltage equal to 9V the instrument does not perform ...

Page 24: ...ife approx 500 tests Auto Power OFF after 3 min of idleness Display Features LCD custom with back light 73x65 mm Memory Features 999 memory locations PC connection Features optoinsulated port for bi directional communication 9 2 ENVIRONMENT 9 2 1 Operating environmental conditions Reference calibration temperature 23 5 C 73 41 F Working temperature 0 40 C 32 F 104 F Maximum relative humidity 80 RH...

Page 25: ... necessary due to previous attempts for repair carried out by unskilled or unauthorized personnel Instruments for whatever reason modified by the customer himself without explicit authorization of our Technical Dept Use not provided by the instrument s specifications or in the instruction manual The contents of this manual may not be duplicated in any form whatsoever without the manufacturer s aut...

Page 26: ...tained by the tripping time test of the RCDs A AC RCD S A AC Ia tripping current in 5s of the automatic RCD rated tripping current of the RCD in case of RCD S 2 I n in ampere 50 safety limit voltage reduced down to 25V in special environments If the installation is protected by an RCD the measurement shall be effected upstream or downstream the RCD short circuiting it to avoid its tripping This me...

Page 27: ... probe finally measure voltage between both of them Fig 7 Earth resistance measurement small sized earth rods 11 2 3 Method for large sized earth rods This procedure is based on the volt ampere metric method as well however it is mainly used whenever it is difficult to place an auxiliary current rod at a distance equal to fivefold the diagonal of the area limiting the earth installation Place the ...

Page 28: ...ing the rods at growing distances a must be quoted in a graph According to the resulting curve suitable rods will be chosen As the test result can be affected by metal parts buried such as pipes cables or other rods etc it is advisable in case of doubts to take a second measurement positioning the rods at an equal distance a but rotating their axis by 90 Fig 9 Measurement of ground resistivity The...

Page 29: ...asurement of ground resistivity 11 3 1 Approximate evaluation of intentional rods contribution The resistance of a rod Rd can be calculated with the following formulas average resistivity of the ground a resistance of a vertical rod Rd L where L length of the element touching the ground b resistance of an horizontal rod Rd 2 L where L length of the element touching the ground c resistance of linke...

Page 30: ...__________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ _________________________________________...

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Page 32: ...Via della Boaria 40 48018 Faenza RA Italy Tel 39 0546 621002 4 linee r a Fax 39 0546 621144 Email ht htitalia it Web www ht instruments com ...

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