HT 2016 - Digital jordmodstandsmĺling. - Elma Instruments
HT 2016 - Digital jordmodstandsmĺling. - Elma Instruments
HT 2016 - Digital jordmodstandsmĺling. - Elma Instruments
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9. TECHNICAL SPECIFICATIONS<br />
Geotest <strong>2016</strong><br />
Version EN 1.01 of 19/10/2000<br />
9.1. TECHNICAL FEATURES<br />
Resistance measurement<br />
Range<br />
Resolution<br />
(Ω)<br />
(Ω)<br />
Accuracy (*)<br />
0.01 ÷ 19.99<br />
0.01<br />
20.0 ÷ 199.9 0.1 ±(2% reading + 3 digits)<br />
200 ÷ 1999<br />
1<br />
(*) If R P > 100R E , RC > 100R E , R P > 50kΩ, RC > 50kΩ the accuracy of the instrument is ±(10%Reading)<br />
R P = resistance of the voltage rod<br />
R C = resistance of the current rod<br />
R E = earth resistance<br />
Measuring frequency<br />
125Hz / 75Hz/ 41.66Hz 6 1Hz<br />
Measuring current<br />
[10mA<br />
Open-terminal measuring voltage<br />
[25Vrms<br />
Waveform of measuring voltage:<br />
sin wave<br />
Interfering voltage:<br />
- amperometric circuit: the measurement is taken with the declared accuracy if the interfering voltage is ≤<br />
3V, while for interfering voltages included between 3 and 30V the accuracy decreases progressively; with<br />
an interfering voltage of about 30V the instrument does not perform the test.<br />
- voltmetric circuit: the measurement is taken if the interfering voltage is ≤ 3V; in case of higher voltages<br />
the instrument does not perform the test.<br />
Resistivity measurement ρ<br />
Range Resolution Accuracy (*)<br />
0.6-125.6 Ωm 0.1 Ωm ±(2% reading + 3 digits)<br />
0.125 – 1.256 kΩm 0.001 kΩm<br />
1.25-19.99 kΩm 0.01 kΩm<br />
20.0 – 199.9 kΩm 0.1 kΩm<br />
(*) If R P > 100R E , RC > 100R E , R P > 50kΩ, RC > 50kΩ the accuracy of the instrument is ±(10%Reading)<br />
R P = resistance of the voltage rod<br />
R C = resistance of the current rod<br />
R E = earth resistance<br />
ρ = 2πDR E = calculated resistivity<br />
Measuring frequency<br />
125Hz / 75Hz/ 41.66Hz 6 1Hz<br />
Measuring current<br />
[10mA<br />
Open-terminal measuring voltage<br />
[25Vrms<br />
Waveform of measuring voltage:<br />
sin wave<br />
Interfering voltage:<br />
- amperometric circuit: the measurement is taken with the declared accuracy if the interfering voltage is ≤<br />
3V, while for interfering voltages included between 3 and 30V the accuracy decreases progressively; with<br />
an interfering voltage of about 30V the instrument does not perform the test.<br />
- voltmetric circuit: the measurement is taken if the interfering voltage is ≤ 3V; in case of higher voltages<br />
the instrument does not perform the test.<br />
EN - 31
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