Hioki 3143 Instruction Manual
  1. Manuals
  2. Brands
  3. Hioki Manuals
  4. Measuring Instruments
  5. 3143
  6. Instruction manual
Hioki 3143 Instruction Manual

Hioki 3143 Instruction Manual

Earth hitester
Hide thumbs Also See for 3143:
Table of Contents

Advertisement

Quick Links

See also: Manual
3143
EARTH HiTESTER
INSTRUCTION MANUAL

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 3143 and is the answer not in the manual?

Questions and answers

Related Manuals for Hioki 3143

Summary of Contents for Hioki 3143

  • Page 1 3143 EARTH HiTESTER INSTRUCTION MANUAL...

  • Page 3: Table Of Contents

    Chapter 4 Technical Information 4.1 About Ground Resistance 4.2 Principle of Conventional Measurement of Ground Resistance (Fall-of-Potential Method) 4.3 Principle of Measurement on Which This Instrument is Based 4.4 Comparison of Values Measured by Conventional Ground Resistance Meters (Fall-of-Potential Method) and Model 3143...
  • Page 4 4.5 Sample Measurement (Measurement of Ground Resistance for Overhead Telecommunications Equipment and Various Types of Protectors) Chapter 5 Precautions concerning Measurement Chapter 6 Maintenance and Service 6.1 9338 CARRYING CASE 6.2 Replacing the Batteries 6.3 Cleaning the Product 6.4 Service...
  • Page 5 ――――――――――――――――――――――――――― Introduction Thank you for purchasing the HIOKI 3143 EARTH HiTESTER. To obtain maximum performance from the instrument, please read this manual first, and keep it handy for future reference. Inspection When you receive the instrument, inspect it carefully to ensure that no damage occurred during shipping.

  • Page 6: Safety Notes

    ――――――――――――――――――――――――――― Safety Notes WARNING This instrument is designed to comply with IEC 61010 Safety Standards, and has been thoroughly tested for safety prior to shipment. However, mishandling during use could result in injury or death, as well as damage to the instrument. Be certain that you understand the instructions and precautions in the manual before use.
  • Page 7 ――――――――――――――――――――――――――― The following symbols in this manual indicate the relative importance of cautions and warnings. Indicates that incorrect operation presents an extreme hazard that could DANGER result in serious injury or death to the user. Indicates that incorrect operation presents a significant hazard that could WARNING result in serious injury or death to the user.
  • Page 8 ――――――――――――――――――――――――――― Measurement categories (Overvoltage categories) This instrument complies with CAT I safety requirements. To ensure safe operation of measurement instruments, IEC 61010 establishes safety standards for various electrical environments, categorized as CAT I to CAT IV, and called measurement categories. These are defined as follows.
  • Page 9 ――――――――――――――――――――――――――― Higher-numbered categories correspond to electrical environments with greater momentary energy. So a measurement device designed for CAT III environments can endure greater momentary energy than a device designed for CAT II. Using a measurement instrument in an environment designated with a higher- numbered category than that for which the instrument is rated could result in a severe accident, and must be carefully avoided.

  • Page 10: Notes On Use

    Using the product in such conditions could cause an electric shock, so contact your dealer or Hioki representative for replacements. (Model 9265) ―――――――――――――――――――――――― Notes on Use...
  • Page 11 ――――――――――――――――――――――――――― DANGER The ground and return measurement terminals of this instrument are designed to measure ground resistance. Accidental connection of the terminals to a commercial power source or potential-bearing object may result in electric shock. Exercise extreme care. WARNING Do not allow the instrument to get wet, and do not take measurements with wet hands.
  • Page 12 viii ――――――――――――――――――――――――――― WARNING To avoid electric shock, turn the power switch off and disconnect the measurement cables before replacing the batteries. To avoid the possibility of explosion, do not short circuit, disassemble or incinerate batteries. Handle and dispose of batteries in accordance with local regulations.
  • Page 13 ――――――――――――――――――――――――――― CAUTION To avoid corrosion from battery leakage, remove the batteries from the instrument if it is to be stored for a long time. To avoid damage to the instrument, protect it from physical shock when transporting and handling. Be especially careful to avoid physical shock from dropping.
  • Page 14 ――――――――――――――――――――――――――― ―――――――――――――――――――――――― Notes on Use...

  • Page 15: Chapter 1 Outline

    (overhead telecommunications equipment), and for telecommunications equipment protectors. Model 3143 was designed and commercially NOTE produced using technology originally devised by the Technical Cooperation Center of NTT East. ――――――――――――――――――――――――...

  • Page 16: Features

    ――――――――――――――――――――――――――― Return Cable Measurement Cable Ground Grounded body being measured (Bar-type earthing electrode) Figure 1 1.2 Features (1) No need to drive auxiliary earthing electrodes into the ground Allows easy measurement of ground resistances, simply by connecting the earthing electrode to the measurement terminals (Ground side) of the instrument and the return line (red line) to the other terminal (Return side) and placing the return line on the ground.
  • Page 17 ――――――――――――――――――――――――――― (3) Reduces the effects of ground voltage The instrument uses a synchronous detection system, with the return line placed directly on the ground in an electrically insulated state. This reduces the adverse effects of higher harmonic ground voltages of commercial frequency to ensure stable measurement.

  • Page 18: Names And Functions Of Parts

    ――――――――――――――――――――――――――― 1.3 Names and Functions of Parts Figure 2 ―――――――――――――――――――――――― Chapter 1 Outline...
  • Page 19 ――――――――――――――――――――――――――― 1. Power switch (POWER) Instrument power switch 2. Measuring knob (MEASURE) Knob for measuring ground resistances. Turn the knob until the instrument indicates a minimum resistance value. 3. Earth: Earthing electrode terminal Terminal to which the earthing electrode is connected, via the lead line (black).
  • Page 20 ――――――――――――――――――――――――――― 9. Battery check Indicates that the batteries have been exhausted. Replace the batteries. 10. Battery cover 11. Fixing screw on the battery cover ―――――――――――――――――――――――― Chapter 1 Outline...

  • Page 21: Chapter 2 Specifications

    ――――――――――――――――――――――――――― Chapter 2 Specifications <Measurement> Measurement Voltage ratio method (measures the method voltage under the series resonance of a loop impedance [Note].) When measured with the lead line connected to the earthing electrode being measured and the return line placed directly on the ground, the resistance value sought is the one that appears as the minimum value in the display as the measuring knob is turned.
  • Page 22 ――――――――――――――――――――――――――― <Correction method for measured values> Averaging Sampled values are subjected to processing averaging, and the resulting value is indicated as a measured value. <Signaling source for measurement> Frequency range 100 kHz - 1.5 MHz Adjustable using the measuring knob on the front panel Frequency variation 240 Hz...
  • Page 23 ――――――――――――――――――――――――――― Storage temperature -10 to 50 to 122 ), and humidity range 80% RH or less (with no condensation) Location of use Altitude up to 2000 m (6562 feet) <Power supply> Power supply Four LR6 alkaline batteries Rated supply voltage: 1.5 V x 4 Maximum rated 1.5 VA max power...
  • Page 24 ――――――――――――――――――――――――――― <Ancillary functions> Power Saving mode The instrument enters Power Saving mode if the measuring knob is left untouched for about 3 minutes. Output of the measurement signaling source is halted. The LCD displays "HOLD." Turn the measuring knob to wake the instrument from Power Saving mode.

  • Page 25: Chapter 3 Measurement Procedure

    ――――――――――――――――――――――――――― Chapter 3 Measurement Procedure DANGER The ground and return measurement terminals of this instrument are designed to measure ground resistance. Accidental connection of the terminals to a commercial power source or potential-bearing object may result in electric shock. Exercise extreme care. WARNING Do not allow the instrument to get wet, and do not take measurements with wet hands.

  • Page 26: Measurement Preliminaries

    ――――――――――――――――――――――――――― WARNING Do not mix old and new batteries, or different types of batteries. Also, be careful to observe battery polarity during installation. Otherwise, poor performance or damage from battery leakage could result. CAUTION Use only the specified battery type (AA alkaline). Manganese batteries, for example, will provide insufficient service life.

  • Page 27: Measuring Method

    ――――――――――――――――――――――――――― 3.2 Measuring method (1) Connecting the cables Connect the measurement cables 9265 supplied with the instrument, as shown in Figure 3. (Couple the lead line [black] to the ground terminal, and the return line [red] to the Return terminal.) Connect the other end of the lead line to the buried earthing electrode and lay the return line on the ground (on paved concrete or asphalt).
  • Page 28 ――――――――――――――――――――――――――― Use only the measurement cables supplied NOTE with the instrument. Use of any other cable will result in inaccurate measurements. Lay the return line directly on the ground in a straight line, confirming that the cable remains in contact with the ground. Correct measurements are not possible if the cable is tangled or forms loops.
  • Page 29 ――――――――――――――――――――――――――― (2) Measurement of ground resistance value Turn the measuring knob (MEASURE) to find the lowest indicated value. The lowest value represents the resistance value of the earthing electrode being sought. Turn the measuring knob as follows: 1) The measurement indicator bar shows the direction in which the knob should be turned.
  • Page 30 ――――――――――――――――――――――――――― The measurement indicator bar displayed may not NOTE stabilize, depending on the resistance value of the grounded body being measured or the environment in which the return line is laid. Particularly for measurements of large ground resistances, no minimum value may be shown, even when the indicator bar is located in the center of the display.
  • Page 31 ――――――――――――――――――――――――――― (3) Hold status The instrument will enter Hold status if the measuring knob (MEASURE) is left untouched for about 3 minutes ("HOLD" is displayed: see Figure 5), with the value measured immediately before the Hold state retained on the display. In addition, the signal from the measurement terminals (between the Ground - Return terminals) is interrupted.
  • Page 32 ――――――――――――――――――――――――――― ―――――――――――――――――――――――― Chapter 3 Measurement Procedure...

  • Page 33: Chapter 4 Technical Information

    ――――――――――――――――――――――――――― Chapter 4 Technical Information This chapter explains the definition of generic ground resistance, types of grounding implementations, principles of measurement of typical ground resistances, and describes grounding methods/implementations and resistance measurements for overhead telecommunications equipment and protectors, as exemplified in typical measurement situations.
  • Page 34 ――――――――――――――――――――――――――― (2) Leakage current and ground voltage In ordinary ground resistance measurements, external influences include leakage current from connected equipment and ground voltage created by ground current. Since the return line of the instrument is laid on the ground in an electrically insulated state, the instrument is relatively resistant to the adverse effects of leakage currents and ground voltages generated...

  • Page 35: Principle Of Conventional Measurement Of Ground Resistance (Fall-Of-Potential Method)

    ――――――――――――――――――――――――――― 4.2 Principle of Conventional Measurement of Ground Resistance (Fall-of-Potential Method) Most ground resistance meters perform measurements based on the fall-of-potential method. These types of meters are widely used in the measurement of the low resistance to the high resistance. This method requires driving into the earth an auxiliary current electrode (electrode C) to inject measuring current and an auxiliary potential electrode...

  • Page 36: Principle Of Measurement On Which

    ――――――――――――――――――――――――――― Driving in auxiliary electrodes is difficult at sites where the ground is paved with concrete or asphalt, resulting in reduced work efficiency. Measurement Horizontal value section Earth surface Resistance range Resistance range of electrode E of electrode C 4.3 Principle of Measurement on Which This Instrument is Based When the earthing electrode is connected to the ground terminal of this instrument through...
  • Page 37 ――――――――――――――――――――――――――― Return line Lead line Ground Grounded body being measured 3143 Rout Figure 8. Diagram of Measurement Principle ≅Rout+Rg R'=Rout+Rg+ 1+(wCgR) As shown above, R' represents the sum of ground resistance Rg and Rout. If the voltage Vm between the measurement terminals is measured, ground resistance Rg may be calculated by the voltage ratio method.

  • Page 38: Comparison Of Values Measured

    3143, while Figure 10 indicates rdg. errors of the 3143 with respect to the values of the 3-pole method defined as true values. In the figure, it is apparent that values obtained by the 3143 match those of the 3-pole method in the range from 10 to 20% rdg.
  • Page 39 Measured Value of 3-Electrode Method (ohm) Figure 9. Correlation between Values Measured by 3-Electrode Method and with the 3143 Measured Value of 3-Electrode Method (ohm) Figure 10. Rdg. Errors of 3143 with Respect to 3- Electrode Method ―――――――――――――――――――――――― Chapter 4 Technical Information...
  • Page 40 ――――――――――――――――――――――――――― 4.5 Sample Measurement (Measurement of Ground Resistance for Overhead Telecommunications Equipment and Various Types of Protectors) It is increasingly common to find some switching and transmission equipment functions formerly located within telecommunications center buildings on or near the premises of residences. This configuration makes it possible to provide diverse information services through various types of networks.
  • Page 41 ――――――――――――――――――――――――――― (1) It is necessary to confirm that the ground resistance value obtained following grounding implementation is lower than the value specified in a standard for safety of each country. (2) Many of the work sites are in residential and office building areas, which means that most of the ground surface is asphalted, making it time and labor-consuming to drive in auxiliary...
  • Page 42 Communications protector line protector Overhead telecommunications Grounding equipment (closure, etc.) electrode Paved ground Grounding electrode Grounding electrode Figure 12. Environment Surrounding Overhead Telecommunications Equipment and Protector 3143 Grounding electrode Figure 13. Example of 3143 Use ―――――――――――――――――――――――― Chapter 4 Technical Information...

  • Page 43: Chapter 5 Precautions Concerning

    3-pole method. Carefully read the following precautionary notes before using this instrument. (1) The 3143 is suitable for measuring the ground resistances of independent bar-type electrodes. Measurement results obtained by the conventional 3-pole method may appear...
  • Page 44 ――――――――――――――――――――――――――― For resistance measurements with safety implications, especially grounding connectors for power facilities, double-check resistance values using the 3-pole method. (2) Use only the measurement cables (9265 MEASUREMENT CABLE) supplied with the instrument. Use of other cables may result in measurement errors.

  • Page 45: Chapter 6 Maintenance And Service

    ――――――――――――――――――――――――――― Chapter 6 Maintenance and Service 6.1 9338 CARRYING CASE The 9338 CARRYING CASE is designed exclusively for this instrument and is capable of accommodating 9265 MEASUREMENT CABLE and four AA batteries in addition to the instrument itself. With the upper cover rotated as shown in Figure 14, measurements can be made without removing the instrument from the case.

  • Page 46: Replacing The Batteries

    ――――――――――――――――――――――――――― 6.2 Replacing the Batteries WARNING To avoid electric shock, turn the power switch off and disconnect the measurement cables before replacing the batteries. After replacing the batteries, replace the cover and screws before using the instrument. To avoid the possibility of explosion, do not short circuit, disassemble or incinerate batteries.
  • Page 47 ――――――――――――――――――――――――――― Screw Figure 15. 1. For safety, disconnect the measurement cables from the instrument. 2. Remove the fastening screw. 3. Remove the cover of the battery compartment in direction A, as shown in the illustration. 4. Replace all four batteries with fresh ones. 5.

  • Page 48: Cleaning The Product

    Hioki representative. Pack the instrument so that it will not sustain damage during shipping, and include a description of existing damage.
  • Page 51 HIOKI 3143 EARTH HiTESTER Instruction Manual Publication date: September 2006 Revised edition 4 Edited and published by HIOKI E.E. CORPORATION Technical Sales Support Section All inquiries to International Sales and Marketing Department 81 Koizumi, Ueda, Nagano, 386-1192, Japan FAX: 0268-28-0568 TEL: 0268-28-0562 E-mail: os-com@hioki.co.jp...
  • Page 52 HEAD OFFICE 81 Koizumi, Ueda, Nagano 386-1192, Japan TEL +81-268-28-0562 / FAX +81-268-28-0568 E-mail: os-com@hioki.co.jp URL: http://www.hioki.co.jp/ HIOKI USA CORPORATION 6 Corporate Drive, Cranbury, NJ 08512, USA TEL +1-609-409-9109 / FAX +1-609-409-9108 3143A980-04 06-09H Printed on recycled paper...

Table of Contents