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> Measuring Tool / Instrument > Clamp Earth Tester |
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Clamp Earth Tester
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| Clamp Earth Tester |
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‘Model : MET-1
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ECompletely different method from theordinary
Earth Testers.
EJust Clamping two CTs to the earthing
conductorand no need to using auxillary eath
rod !! |
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This Clamp Earth Tester Model : MET-1 measure the earth resistance by using two clamp CTs
without disconnecting the earthing conductor and without using auxillary ground rod can
measure only the objective earth resistance without any influence from other conductors.
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Appplications for Measuring of Earth Resistance
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1 Outer case & iron stand of extra high tension
cable and high voltage appliance.
2 Lighting arrester.
3 Transformer at output end for the extra high
voltage measuring appliance.
4 Confirming the grounding of the conductors
for equipotentia bonding.
5 Stic electricity preventsion equipment &
appliance.
6 Mulitiple earthSpecifications
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Specifications
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Measuring
function
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Earth
Resistance, AC Current (Line &
Leakage)
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Measuring
method
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Dual
intergration mode, Clamping two CTs
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Display
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LCD,
16 letters / characters x 2 lines with
contrast adjustor
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Safety
standard
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Meets
the requirements for double insulation
to IEC 1010-2 installation category II.
600V phase to earth
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Sampling
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Approx.
2 times / second for AC current
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Measuring
Time
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Approx.
30 second for earth resistance
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Over
range indication
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"OVER"
on LCD readout both for AC current &
earth resistance
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Low
battery indication
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"B"
mark on LCD readout
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Auto
power off
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The
meteris set to power off mode, approx. 5
minutes after the power swich on.
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Data
hold function
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"DH"
mark on LCD readout
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Accuracy
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23}5,
80% RH max.
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Eath Resistance
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| Range |
Resolution |
Accuracy |
| 200Ά |
0.1Ά |
0
` 10Ά@@@@}0.2Ά |
| 10
` 50Ά@@ @}1.0Ά |
| 50
` 200Ά @@}5.0Ά |
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AC Current (Max. applicable current : F10A rms)
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Range
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Resolution
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Accuracy
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200mA
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0.1mA
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2%
rdg } 8 dgt
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2000mA
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1mA
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10A
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0.01A
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| CT for decection |
340mm |
| CT for superposition |
340mm, auto sweep 4KHz ` 400KHz
Superposing level : approx. 160mVp
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| Storage temperature |
-10`60, 80% RH without condensation |
| Operating temperature |
0`40, 80% RH without condensation |
| Circuit voltage |
less than 500V |
| Withstanding Voltage |
AC 3700V, 1minute between operation handle
and CT core
AC 2300V, 1minute between supply cource
and body case of the instrument
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| Power Supply |
AC100V `240V (50Hz/60Hz) with
adaptorInternal Ni-Cd battery (1.2 x 5)
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| Battery life |
450 times measurement under full charged
condition ( according to the time of chargeing
and discharging).
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| Size & Weight |
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| CT for Detection |
90.5(W) x 165(H) x 38(D)mm, approx. 460g |
| CT for superposition |
90.5(W) x 165(H) x 38(D)mm, approx. 440g |
| Instrument body |
190(W) x 140(H) x 42(D)mm, approx. 800g |
| Standard accessories |
Detection Clamp CT EEEE@1
Superpotion Clamp CTEEE@1
AC AdaptorEEEEEEEEEEE@1
Carrying caseEEEEEEEEE@1
Instrument bodyEEEEEEE@1
Subsidary lead wireEEEEE@1 |
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