Influence of Expendable Current Profiler Probe on Induced Electric Field of Ocean Currents

Table 3

Test data for influence of high-resistance cylinder on 15 Hz alternating electric field (dilute brine).

Group number	Output rms of lock-in amplifier	High-resistance cylinder					Average value of
		With		Without
		CP	LA	CP	LA
Group 1	2 V	339 mV	73.92 mV	339 mV	49.0 mV	1.509	1.502
Group 2	1 V	163 mV	38.03 mV	163 mV	25.33 mV	1.501
Group 3	0.1 V	16.5 mV	3.80 mV	16.5 mV	2.53 mV	1.502
Group 4	10 mV	—	381 V	—	255.8 V	1.489
Group 5	1 mV	—	38.17 V	—	25.25 V	1.512
Group 6	100 V	—	3.70 V	—	2.450 V	1.510
Group 7	10 V	—	361 nV	—	241 nV	1.498
Group 8	2 V	—	74 nV	—	49.5 nV	1.495

CP: voltage rms of copper plate supplying electricity.
LA: measured rms of lock-in amplifier.