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EARTH HITESTER
3151 HIOKI
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Ground resistance meter 3-electrode measurement on the 3151 gives greater precision !
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Ground resistance measurement involves factors that are not encountered during ordinary resistance measurement, such as polarization of the earth, the influence of grounding current due to leak current and grounding voltage, and the influence of auxiliary grounding resistance. The 3151 is able to make more accurate measurements more safely under difficult conditions because it uses the alternating current potentiometer method to provide measurement accuracy, and because it contains features such as an auxiliary grounding resistance check feature and measurement frequency switching.
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Basic specifications
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Ground resistance
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10 ohm (0 to 11.5 ohm), 100 ohm (0 to 115 ohm), 1000 ohm (0 to 1150 ohm), 3 ranges (±2.5 % f.s.)
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Ground voltage
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30 V (0 to 30 V), (±3.0 % f.s.)
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Operating method
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AC potentiometer method
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Open circuit voltage
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50 V AC max.
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Measurement current
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15 mA AC max. (3 mA AC max. when using the two electrode method)
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Measurement frequency
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575 Hz (with 3a or 2a selected) or 600 Hz (with 3b or 2b selected)
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Power supply
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R6P(AA) manganese batteries × 6 (at least 500 operations), or LR6(AA) alkaline batteries × 6 (at least 1400 operations) Note:30 seconds measurement, 30 seconds off operating time
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Dimensions, mass
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164 mm(6.46 in)W × 119 mm(4.69 in)H × 88 mm(3.46 in)D, 800 g (28.2 oz)
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Accessories
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AUXILIARY EARTHING RODS 9214 (2), MEASURING CABLE 9215 (black 5 m(16.41 ft), yellow 10 m(32.81 ft), red 20 m(65.62 ft), one each CABLE WINDER 9216 × 3), CARRYING CASE 9393 (1)
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 EARTH HITESTER
3151 HIOKI
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Ground resistance meter Say goodbye auxiliary grounding rods with the 3143
Grounding is increasingly important for the safe operation and maintenance of communications equipment and many other types of facilities. However, in an urban environment where the ground is covered with concrete or asphalt, conventional measurement methods that require inserting auxiliary grounding electrodes are difficult to use. The 3143 uses a new measurement principle that makes auxiliary grounding electrodes unnecessary, so it can be used to measure ground resistance on paved roads.
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Differences between the Model 3151 and 3143
Common ground resistance meters such as the 3151 measure the resistance using a frequency between 500 Hz and several kHz.The 3143 uses a frequency between 100 kHz and 1.5 MHz, close to that of a lightning surge. Therefore, measurement errors can result if the 3143 is used in situations such as the following.In these instances, we recommend using Model 3151.
►When the measurement point is located at a distance from the insertion point of the grounding electrode.
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 4105A
EARTH TESTERS
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►Dust and drip proof.(designed to IEC 529 IP54)
►In addition to the facility for precision measurement, test leads for simplified two wire measuring system also supplied as standard accessories.( unit can be hung from the neck for simplified measurement)
►Designed to meet IEC61010-1 safety standard.
►Capable of measuring earth voltage.
►Automatic warning when resistance of auxiliary earth spikes is in excess of tolerance.
►Small and lightweight. Shock resistant new case material.
►2mA measuring current permits earth resistance tests without tripping earth leakage current breakers in the circuit under test.
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Measurement
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Earth Resistance:0~20Ω/0~200Ω/0~2000Ω
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Ranges
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Earth Voltage[50,60Hz]:0~200V AC
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Accuracy
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Earth Resistance:±2%rdg±0.1Ω(20Ωrange)
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|±2%rdg±3dgt(200Ω/2000Ωrange)
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Earth Voltage:±1%rdg±4dgt
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Overload Protection
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Earth Resistance:280V AC for 10 seconds
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across 2 of the 3 terminals
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Earth Voltage:300V AC for 1 minute
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Safety Standard
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IEC61010-1 CAT.III 300V Pollution Degree 2, IEC61557
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Applicable Standards
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IEC60529 IP54
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Withstand Voltage
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3700V AC for 1 minute
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Power Source
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R6P(AA)(1.5V) × 6
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Dimensions
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105(L) × 158(W) × 70(D)mm
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Weight
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550g approx.
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Accessories
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7095(Test Leads) × 1set(red-20m, yellow-10m, green-5m)
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8032(Auxiliary earth spikes) × 1set
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7127(Simplified measurement probe) × 1set
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R6P(AA) × 6
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Neck strap
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Instruction Manual
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Carrying Case : 4105A(Soft Case) -4105A-H(Hard Case)
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Optional
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7100(Precision measurement Cord Set)
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 4102A
EARTH TESTERS
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►The latest circuit design permits the instrument to operate with the minimum of influence from earth voltage and earth resistance of auxiliary earth spikes.
►Dust and drip proof. (designed to IEC 529 IP54)
►Earth resistance value can be read directly from the scale.
►Designed to meet IEC61010-1 safety standard.
►Capable of measuring earth voltage.
►Small and lightweight. Shock resistant new case material.
►2mA measuring current permits earth resistance tests without tripping earth leakage current breakers in the circuit under test.
►Lead wire connection to C and P terminals and proper auxiliary earth resistance can be checked by "OK" lamp. Lead wire connection to C and E terminals is good when "OK" lamp is illuminated.
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Top of Form
Measurement
Bottom of Form
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Earth Resistance:0~12 Ω/0~120 Ω/0~1200 Ω
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Ranges
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Earth Voltage[50,60Hz]:0~30V AC
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Accuracy
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Earth Resistance: ±3% of full scale
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Earth Voltage: ±3% of full scale
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Overload Protection
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Earth Resistance:276V AC for 10 seconds
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across 2 of the 3 terminals
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Earth Voltage:276V AC for 1 minute
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Safety Standard
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IEC61010-1 CAT.III 300V Pollution Degree 2, IEC61557
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Applicable Standards
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IEC60529 IP54
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Withstand Voltage
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3700V AC for 1 minute
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Power Source
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R6P(AA)(1.5V) × 6
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Dimensions
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105(L) × 158(W) × 70(D)mm
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Weight
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600g approx.
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Accessories
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7095(Test Leads) × 1set(red-20m, yellow-10m, green-5m)
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8032(Auxiliary earth spikes) × 1set
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7127(Simplified measurement probe) × 1set
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R6P(AA) × 6
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Neck strap
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Instruction Manual
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Carrying Case 4102A(Soft Case) - 4102A(Soft Case)
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Optional
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7100(Precision measurement Cord Set)
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