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Summary of Contents for Hioki FT6031-50
- Page 1 FT6031-50 Instruction Manual EARTH TESTER July 2020 Edition 1 FT6031B961-00 20-07H HIOKI FT6031B961-00...
- Page 2 HIOKI FT6031B961-00...
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Page 3: Table Of Contents
Connecting the Z3210 Wireless Adapter (Option) ............29 Procedure ..............30 Making Measurements Measurement Procedure ......31 Inspecting Before Use ........32 Setting Up Comparator (PASS/FAIL Test) ...36 How to set up comparator ......... 37 How to disable comparator ........37 HIOKI FT6031B961-00 FT6031B961-00... - Page 4 How to insert/pull out auxiliary earthing rod ....60 Auto Power Save (Power-saving Function) ......62 Wireless Communications Function (GENNECT Cross) ...........63 Activating the LCD All-on Display ....65 3.10 Displaying the Serial Number ......66 Specifications 4.1 General Specifications .........67 Input, Output, and Measurement Specifications ..........69 HIOKI FT6031B961-00...
- Page 5 Contents Maintenance and Service Repair, Inspection, and Cleaning ....77 Troubleshooting ..........79 Error Display ..........83 Appendix Earth Resistance ...........85 Measurement Principle .........87 Warranty Certificate HIOKI FT6031B961-00...
- Page 6 Contents HIOKI FT6031B961-00...
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Page 7: Introduction
Introduction Introduction Thank you for choosing the HIOKI FT6031-50 Earth Tester. To ensure your ability to get the most out of this instrument over the long term, please read this manual carefully and keep it available for future reference. Carefully read the separate document entitled “Operating Precautions”... - Page 8 Indicates a high-voltage hazard. Failure to verify safety or improper handling of the instrument could lead to an electric shock, burn, or death. Indicates an action that must not be performed. Indicates an action that must be performed. HIOKI FT6031B961-00...
- Page 9 Directive (WEEE Directive) in EU member states. Indicates that the product conforms to regulations required by the EU Directive. Other notations Instructs the reader to see below for additional information. (p.) Indicates the page number to reference. Operation key names are highlighted in bold. HIOKI FT6031B961-00...
- Page 10 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 1 2 3 4 5 6 7 8 9 0 Accuracy Hioki expresses accuracy as error limit values specified in terms of percentages relative to reading and full scale, and digits. (Displayed value) Refers to the displayed value of the measuring instrument.
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Page 11: Verifying Package Contents
Carefully check the accessories, panel keys, and connectors. If the instrument seems to have been damaged or does not work as specified, contact your authorized Hioki distributor or reseller. Check the package contents as follows. Accessories FT6031-50... -
Page 12: Options (Sold Separately)
Options (sold separately) The options listed below are available for the instrument. To order an option, please contact your authorized Hioki distributor or reseller. Options are subject to change. Please check Hioki's website for the latest information. L9787 Test Lead (for simplified measurement method, indoor use only, red and black 1.2 m each) -
Page 13: Safety Notes
If you have not used any electrical measuring instruments before, you should be supervised by a technician who has experience in electrical measurement. HIOKI FT6031B961-00... - Page 14 Applicable to test and measuring circuits connected directly to utilization points (socket outlets and similar points) of the low- voltage mains installation. Example: Measurements on household appliances, portable tools, and similar equipment, and on the consumer side only of socket-outlets in the fixed installation. HIOKI FT6031B961-00...
- Page 15 Example: Measurements on devices installed before the main fuse or circuit breaker in the building installation. Distribution Panel Service Entrance Internal Wiring Service Drop CAT II CAT III CAT IV Outlet Power Meter Fixed Installation HIOKI FT6031B961-00...
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Page 16: Usage Notes
Using the instrument under such conditions could result in an electric shock. Replace the test leads with those specified by Hioki. • Check the instrument for any damage that may have occurred during storage or shipping, and perform functional checks before use. - Page 17 • Do not place the instrument on an unstable or uneven surface. Doing so could cause the instrument to fall or turn over, causing bodily injury or damage to the instrument. HIOKI FT6031B961-00...
- Page 18 7: Watertight (Quantities of water that may harm the enclosure when it is temporarily immersed in water shall not penetrate the enclosure.) For details on the operating temperature and humidity range, see the specifications. (p. 6 7) HIOKI FT6031B961-00...
- Page 19 Additionally, use the original packing materials, and be sure to double box the instrument. Accidental damage suffered in transit is not covered by the warranty. • Attach a description of the issue when sending out your instrument for repair. HIOKI FT6031B961-00...
- Page 20 Usage Notes HIOKI FT6031B961-00...
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Page 21: Overview
The resistance that the auxiliary earthing High allowable electrode can tolerate is now about 10 times earth resistance for higher than the conventional level. As a result, auxiliary earthing electrode it can provide measurement under adverse conditions. HIOKI FT6031B961-00... - Page 22 The instrument is supplied with useful Supplied with winders so that it can be easily prepared and winders packed up before/after measurement. Drop-proof Its robust structure can withstand a drop (when equipped with a protector) from 1 m onto concrete surface. HIOKI FT6031B961-00...
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Page 23: Part Names And Functions
Connected with the red cable. (p. 2 5, p. 2 8, p. 3 0) Operation Display buttons (p. 2 2) (p. 1 9) IMPORTANT Please do not press the buttons of the instrument with a sharp object. It may damage the instrument. HIOKI FT6031B961-00... - Page 24 Battery cover (side view) Waterproof seal It needs to be replaced when degraded. Please contact your authorized Hioki distributor or reseller. Battery cover Removed when replacing the batteries or attaching the Z3210. (p. 2 8, p. 3 0) Serial number...
- Page 25 Part Names and Functions Operation buttons HIOKI FT6031B961-00...
- Page 26 • Lights up during earth resistance measurements. COMP button • Sets/cancels comparator setting. (The COMP indicator lights up/goes off.) (p. 3 7) • Wireless communications function on/off (Press and hold for at least 1 s.)* (p. 6 3) HIOKI FT6031B961-00...
- Page 27 Part Names and Functions Ω button • Sets/cancels zero adjustment setting. (Press and hold for at least 1 s.) (p. 4 0, p. 5 3) *: With Z3210 installed HIOKI FT6031B961-00...
- Page 28 Appears when comparator setting is enabled. (p. 3 6) Indicates that the measured value i s being retained. Appears when earth potential exceeds allowable range. Indicates wireless communication function status* (p. 6 3) Flashes: Communicating Lights up: Wireless function on Lights off: Wireless function off HIOKI FT6031B961-00...
- Page 29 Earth resistance of earthing electrode Earth resistance of auxiliary earthing electrode S Earth resistance of auxiliary earthing electrode H Live wire warning indicator (Blinks during earth resistance measurements) *: Optional Z3210 Wireless Adapter required separately See p. 8 3 for error display. HIOKI FT6031B961-00...
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Page 30: How To Use Carrying Case
It may damage the case. • Please do not wash the carrying case. Measurement cable Earth Tester (Black) • Winder • Auxiliary Earthing Rod Instruction Manual Please make sure to retract the winder knob before storing it in the carrying case. HIOKI FT6031B961-00... -
Page 31: Preparing For Measurement
Tilt the instrument and slide it into the protector, and then push the entire instrument into the protector. Removing the protector Hold it with both hands and push the one end of the protector down. IMPORTANT If the protector is removed, the drop-proofness (p. 6 7) will be void. HIOKI FT6031B961-00... -
Page 32: Inserting/Replacing Batteries
• To prevent instrument damage or an electric shock, use only the screws that are originally installed for securing the battery cover in place. If you have lost any screws or find that any screws are damaged, please contact your authorized Hioki distributor or reseller. HIOKI FT6031B961-00... - Page 33 As the battery charge diminishes, black charge bars disappear, one by one, from the left of the battery indicator. The battery voltage is low. Replace the batteries as soon as possible. (Blinks) The battery is exhausted. Replace the batteries. HIOKI FT6031B961-00...
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Page 34: Procedure
When replacing the batteries, all of the old batteries should be removed. Pay attention to the polarities of the batteries when inserting four new batteries (LR6). Reattach the battery cover and tighten the screws. Attach the protector. (p. 2 5) HIOKI FT6031B961-00... -
Page 35: Connecting The Z3210 Wireless Adapter (Option)
• To prevent instrument damage or an electric shock, use only the screws that are originally installed for securing the battery cover in place. If you have lost any screws or find that any screws are damaged, please contact your authorized Hioki distributor or reseller. HIOKI FT6031B961-00... -
Page 36: Procedure
Z3210 correctly, install the the Z3210. Z3210 as far as it will go. Exercising care to the polarities of the batteries when inserting them to the instrument. Reattach the battery cover and tighten the screws. Attach the protector. (p. 2 5) HIOKI FT6031B961-00... -
Page 37: Making Measurements
Perform zero adjustment. ( 3-pole method [p. 40], 2-pole method [p. 54]) Start the measurement. Finishing the measurement Turn the power off and remove measurement cables or test leads from the object under measurement. HIOKI FT6031B961-00... -
Page 38: Inspecting Before Use
Check the instrument/device for any damage that may have occurred during storage or shipping, and perform functional checks before use. If you find any damage to the instrument, please contact your authorized Hioki distributor or reseller for repair. Check items Solution... - Page 39 3P/2P button to may have a break. display → Replace it with another lead that is For 2-pole method specified by Hioki. If the symptom Press the 3P/2P button to persists even after the measurement display cable or test lead is replaced, the instrument may have a failure.
- Page 40 • To prevent an electric shock, confirm that any of the white or red portion (insulation layer) of the L9787 Test Lead and the L9844 Measurement Cable is not exposed. If the cable is exposed, do not use the cable. HIOKI FT6031B961-00...
- Page 41 If a terminal is loose, the contact resistance will increase, resulting in overheating, equipment burnout, or a fire. CAUTION • To avoid damaging the measurement cables or test leads, unplug them by grasping the connectors, not the cables or cords. HIOKI FT6031B961-00...
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Page 42: Setting Up Comparator (Pass/Fail Test)
Comparison result Display Beep Intermittent Measured value ≤Reference value (PASS) Continuous Measured value > Reference value (FAIL) The comparison reference value can be chosen from the reference values in the following table. Ω Reference value ( 100* *: Default HIOKI FT6031B961-00... -
Page 43: How To Set Up Comparator
Press the COMP button several times until the OFF indicator appears on the display. The comparator will be disabled if no button is pressed for about 2 s after the OFF indicator appears on the display. HIOKI FT6031B961-00... -
Page 44: Precise Measurement For Earth Resistance (Precise Measurement Method, 3-Pole Method)
When measuring a large-scale earthing electrode such as a mesh earthing electrode, ring earthing electrode, or earthing electrode provided by a large building structure, it cannot be accurately measured since the H(C) electrode and S(P) electrode come inside HIOKI FT6031B961-00... - Page 45 Generally, measurement of large-scale earthing electrode requires a large measurement current of approx. 20 A. Use measuring instrument designed for measuring large-scale earthing electrodes for this measurement. (No measuring instrument available for this purpose from Hioki.) HIOKI FT6031B961-00...
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Page 46: Performing Zero Adjustment
Check the connection and perform cable check with a tester etc. Ω Press the button. lights up and then zero adjustment is completed. How to disable zero adjustment Ω Press and hold the button for at least 1 s while is on. HIOKI FT6031B961-00... -
Page 47: Connecting Measurement Cables
• For safety reasons, when taking measurements, only use the measurement cables provided with the instrument. • The cable is hardened in freezing temperatures. Do not bend or pull it to avoid tearing its shield or causing a break. HIOKI FT6031B961-00... - Page 48 Precise Measurement for Earth Resistance (Precise Measurement Method, 3-pole Method) Yellow Black 10 m 10 m Auxiliary Auxiliary Earthing Earthing Earthing Electrode Electrode Electrode HIOKI FT6031B961-00...
- Page 49 • For accurate measurement, the distance between E, S, and H needs to be approx. 5 m. The measurement cables (yellow) and (red) should be positioned approx. 10 cm away from each other. Make sure the cables do not tangle or overlap together. HIOKI FT6031B961-00...
- Page 50 • As an alternative to the Earth Nets, a metal plate or aluminum foil etc. may be used. • Since asphalt is insulator, it is generally not possible to install the auxiliary earthing electrode on asphalt. However, measurement may be possible on asphalt that has water permeability. 9050 Earth Nets HIOKI FT6031B961-00...
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Page 51: Measuring Earth Resistance
MEASURE button again. • The instrument automatically detects AC/DC ( ) of the earth potential. If AC/DC needs to be switched, it can be switched by pressing the button while the current earth potential has been displayed. HIOKI FT6031B961-00... - Page 52 Earth resistance of earthing electrode E Earth resistance of auxiliary earthing electrode S Earth resistance of auxiliary earthing electrode H Earth potential HIOKI FT6031B961-00...
- Page 53 Ω When 9.52 When 13.48 electrode H measured measured Ω Ω Ω Ω Ω 0 to 5 k 9.52 (Range: 20 13.48 (Range: 20 Ω Ω Ω Ω Ω Ω to 50 k (Range: 200 13.5 (Range: 200 HIOKI FT6031B961-00...
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Page 54: Stowing
(black) from the earthing electrode and fold it, and then stow it into the carrying case. (p. 2 4) IMPORTANT Always fit the cover of the measurement terminals immediately after use. Any foreign object entering the measurement terminal may cause a failure. HIOKI FT6031B961-00... -
Page 55: Continuous Measurement Function
Press and hold the 3P/2P button for at least 1 s until the indicator appears on the display. Press the MEASURE button. The instrument will measure earthing resistance continuously. To switch the parameter displayed during measurement, press the button. HIOKI FT6031B961-00... - Page 56 • Approx. 3.5 hours (3-pole method, auxiliary earthing resistance of 100 Ω Ω measuring 10 using the 20 range, without Z3210 installed) Ω • Approx. 3 hours (3-pole method, auxiliary earthing resistance of 100 Ω Ω measuring 10 using the 20 range, with Z3210 installed, using wireless communications) HIOKI FT6031B961-00...
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Page 57: Simplified Measurement For Earth Resistance (Simplified Measurement Method, 2-Pole Method)
• The instrument can output a voltage of approx. 30 V. Although the instrument has a dustproof, jet-proof and waterproof structure, the instrument should always be dried before using it for measurement so as to avoid electric shock. HIOKI FT6031B961-00... - Page 58 • When carrying out measurements with the sleeves in place, be careful to avoid damaging the sleeves. • The L9787 is a test lead specifically designed for indoor use. Do not use it outdoor. HIOKI FT6031B961-00...
- Page 59 In the simplified measurement method, the resistance of the earthing element used is added to the measurement result. Ω It is very difficult to measure 10 or less in the simplified method HIOKI FT6031B961-00...
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Page 60: Performing Zero Adjustment
Ω Press the button. lights up and then zero adjustment is completed. How to disable zero adjustment Ω Press and hold the button for at least 1 s while is on. HIOKI FT6031B961-00... -
Page 61: Connecting Test Leads
The figure below shows an example of connection in the case of using a commercial power supply that is grounded on its N (neutral) side. Home distribution panel Outdoor Indoor Master Pole-mounted breaker transformer Central earth terminal HIOKI FT6031B961-00... - Page 62 3P/2P button so that the retained value is unlocked and the current earth potential will be displayed. • When is on, or when (live wire warning LED) is blinking, it is not possible to execute earth resistance measurement. HIOKI FT6031B961-00...
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Page 63: Measuring Earth Resistance
Remove the test leads from the measurement terminals and fit the cover of the measurement terminals. (p. 4 8) Fold the test leads together and stow it into the carrying case. HIOKI FT6031B961-00... -
Page 64: Cautions And Tips For Measurement
Figure (b) in the measured resistance even though the auxiliary earthing rod S(P) has been moved. If no flat section is seen, the measurement distance is insufficient. Move the installation locations of the auxiliary earthing rods (S[P] and H[C]) to further locations. HIOKI FT6031B961-00... -
Page 65: Location To Install Auxiliary Earthing Rod
S(P) within 29° from the straight line between the earthing element E and auxiliary earthing rod H(C), wherein the location should be outside the radius of 5 m from the earthing element E and auxiliary earthing rod H(C) as shown in the figure. S(P) H(C) 29° HIOKI FT6031B961-00... -
Page 66: How To Insert/Pull Out Auxiliary Earthing Rod
If the ground is too hard for inserting by hand, use a hammer to perpendicularly drive into the ground. Hammering the auxiliary earthing rod too hard may result in bending it. In case of not going into the ground with gentle taps, use the optional 9050 Earth Nets for measurement. HIOKI FT6031B961-00... - Page 67 • Do not apply force to the auxiliary earthing rod from the side as it may result in bending the auxiliary earthing rod. HIOKI FT6031B961-00...
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Page 68: Auto Power Save (Power-Saving Function)
• The settings of an disabled auto power save will not be saved when the power is turned off. • After use, always turn off the instrument. Even when the auto power save is enabled, the instrument consumes a small amount of the battery power. HIOKI FT6031B961-00... -
Page 69: Wireless Communications Function (Gennect Cross)
COMP Launch the GENNECT Cross button for at least 1 s. and pair it with the instrument. Select the measurement function and start measurement. HIOKI FT6031B961-00... - Page 70 8 instruments). • Allow about 5 s to 30 s for the instrument to pair with the app after being turned on. If the instrument fails to pair within 1 min., relaunch GENNECT Cross and cycle the instrument’s power. HIOKI FT6031B961-00...
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Page 71: Activating The Lcd All-On Display
3.9 Activating the LCD All-on Display This section describes how to check for screen issues by enabling all indicators on the LCD display at once. Turn the power on while pressing the button. Press any button. Its normal measurement screen will appear. HIOKI FT6031B961-00... -
Page 72: Displaying The Serial Number
Press any button. Its normal measurement screen will appear. First 4 digits Last 5 digits (Example of a serial number: 200756789) The 9-digit serial number indicates the year (first two digits) and the month of manufacture (next two digits). HIOKI FT6031B961-00... -
Page 73: Specifications
Measuring circuit: EN 61010 EMC: EN 61326 Earth tester: EN 61557 Power supply AA alkaline battery (LR6) ×4 Rated supply voltage: 1.5 V DC× 4 Maximum rated power: 3 VA Available effective battery voltage: 4.5 V ±0.19 V to 6.8 V HIOKI FT6031B961-00... - Page 74 (including protector, excluding cover of the measurement terminals) Mass Approx. 570 g (20.1 oz.) (including batteries and protector, excluding other accessories) Product warranty 3 years period Accessories See “Verifying Package Contents” (p.5) Options See “Options (sold separately)” (p.6) HIOKI FT6031B961-00...
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Page 75: Input, Output, And Measurement Specifications
See “Allowable earth potential” in “Basic specifications / accuracy specifications”. • Resistance of auxiliary earthing electrode: See “Allowable resistance of auxiliary earthing electrode” in “Basic specifications / accuracy specifications” • External magnetic field: 400 A/m or less, DC and frequency 50 Hz/60 Hz HIOKI FT6031B961-00... - Page 76 Input, Output, and Measurement Specifications Accuracy Accuracy guarantee period: 1 year guarantee Accuracy guarantee period after adjustment made by conditions Hioki: 1 year Accuracy guarantee temperature and humidity range: 23°C ±5°C (73°F ±9°F), 80% RH or less HIOKI FT6031B961-00...
- Page 77 3-pole method: 25 mA rms or less current 2-pole method: 4 mA rms or less Measurement current Sine wave (Distortion factor of 5% or less) waveform Measuring 128 Hz ±2 Hz frequency Measurement 3-pole method: Within 6 s time 2-pole method: Within 3 s HIOKI FT6031B961-00...
- Page 78 Not applicable due to digital type Effect of supply Accuracy × 0.5 and within accuracy specifications voltage ( E Effect of Accuracy × 1.0 (−10°C to 50°C) temperature Accuracy × 2.0 (−25°C to −10°C, 50°C to 65°C) HIOKI FT6031B961-00...
- Page 79 Maximum display 42.0 V peak (auto-check value after start of measurement) Accuracy ±2.3% rdg ±8 dgt Overload 360 V AC (for 1 min., between each terminal) protection 360 V DC (for 1 min., between each terminal) HIOKI FT6031B961-00...
- Page 80 *5: Does not apply when using the 2-pole method, in which case the auxiliary earthing electrode’s allowable resistance is used as the upper limit value. *6: It shall be the range in which the operation uncertainty within ±30% is guaranteed; applied to 3-pole method. HIOKI FT6031B961-00...
- Page 81 Input, Output, and Measurement Specifications *7: Applied in the range excluding 18°C to 28°C. *8: Function to check whether or not the peak of earth potential is within the allowable range; no AC coupling; display the peak value (peak on + side). HIOKI FT6031B961-00...
- Page 82 18°C to 28°C) Accuracy × 2.0 (−25°C to −10°C, 50°C to 65°C) Range Display range 30 V rms configuration Maximum display value 30.0 V rms Resolution 0.1 V ±1.3% rdg ±4 dgt Accuracy 50 Hz/60 Hz ±2.3% rdg ±8 dgt HIOKI FT6031B961-00...
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Page 83: Maintenance And Service
Make sure that the protector has been removed and rinse with room-temperature water. Washing with hot water may compromise the instrument’s waterproofness. • After cleaning, thoroughly wipe off water of the instrument and protector. Completely dry them before putting the protector on. HIOKI FT6031B961-00... - Page 84 Disposal Dispose of the instrument in accordance with local regulations. Protector A protector is available as a service part. Contact your authorized Hioki distributor or reseller. HIOKI FT6031B961-00...
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Page 85: Troubleshooting
Troubleshooting 5.2 Troubleshooting If damage is suspected, read the “Before sending the instrument for repair” (p. 80) section before contacting your authorized Hioki distributor or reseller. Be sure to follow these precautions when transporting the instrument: • Remove batteries, accessories, and optional equipment from the instrument in order to avoid damage. - Page 86 Replace the batteries with new ones. The batteries have high internal resistance. → Such high-internal-resistance batteries, which provide only a little energy even if they are new, cannot work. Use batteries produced by other manufactures. HIOKI FT6031B961-00...
- Page 87 → Remove the equipment that has been connected to the earthing electrode and then carry out the measurement. (“When NOISE appears” [p. 4 5]) HIOKI FT6031B961-00...
- Page 88 Auxiliary earthing rod has It is recommended to purchase the L9840 been bent. Auxiliary Earthing Rod. (Commercially available pegs have sharp tips, which may damage the carrying case.) HIOKI FT6031B961-00...
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Page 89: Error Display
Abnormality in firmware Instrument failure. Err2 Adjustment data damaged Contact your authorized Err4 Setting data damaged Hioki distributor or reseller to organize repair. Abnormality in measurement Err5 circuit Take the following actions: • Reinstall the Z3210. • Install a different Z3210. - Page 90 Error Display HIOKI FT6031B961-00...
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Page 91: Appendix
10 m to accurately measure the resistance of earthing electrode. • Presence of disturbance factors There are disturbance factors such as effects from earth potential and auxiliary earthing electrode in the measurement of earth resistance. The earth potential caused by a leakage current from a device HIOKI FT6031B961-00... - Page 92 The instrument employs a system that is less susceptible to these disturbances and allows accurate measurement under adverse conditions. HIOKI FT6031B961-00...
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Page 93: Measurement Principle
E electrode is derived from the measured current I and voltage V. It is not possible to accurately measure the voltages between H(C) and E electrodes and between H(C) and S(P) electrodes. AC Power supply Ammeter Voltmeter × E electrode S(P) electrode H(C) electrode HIOKI FT6031B961-00... - Page 94 Measurement Principle HIOKI FT6031B961-00...
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