CorroZoa Zero Ohm Ammeter

The CorroZoa is an ideal instrument for measuring very small corrosion currents in the microamp range produced in CorroWatch and CorroRisk sensor installations.

The measurement of small currents in the microamp range is inaccurate with a conventional multimeter/ammeter due to loading by the meter.

Standard measurement devices insert a resistance into the circuit and report the current as the voltage across the resistance divided by the resistance.

In most circuits, where a small current measurement is to be taken, the insertion of this resistance by the ammeter can cause significant error.

In contrast to standard devices a Zero Ohm Ammeter counters the effect of the inserted resistance by keeping the voltage drop across the input terminals below a few microvolt.

The current used to maintain the null voltage across the terminals is precisely measured, displayed and made available at the output measurement pins. Because there is no burden on the measured circuit, the reported current is extremely precise.

Special properties:

• Unique battery-powered instrument for measuring low corrosion current
• Can be preset for measurement of up till 6 carbon steel electrodes
• Possibility of programmed measurement and data collection
• Registers connected values of potential and temperatures
• Measuring results are transferred via USB interface.

Measuring channels:

• Corrosion current and potential, up to 6 channels
• Temperature
• Storing function, up to 999 measurements.

The CorroZoa will run for approx. 200 hours on a fully charged battery at 20 °C. Charge time for a full charge is approx. 2 hours.

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