Amprobe ACD-10 PRO Gebrauchsanweisung - Seite 7

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Note: DC 400.0mV range is designed with 1000MΩ high input impedance for least

current drain in measuring small signals, and can cope better with most commercially

available voltage output transducers/adapters. The non-zero display reading is normal

when the meter inputs are open circuit, which will not affect actual measurement

accuracy. The meter will show close to zero reading when the inputs are shorted. Open

input is actually a floating condition, which is not a zero-volt-input condition.

Note: Hz input sensitivity varies automatically with function range selected while

activating the Hz function. Lowest range has the highest sensitivity, and the highest

range has the lowest sensitivity. Activating the Hz function while measuring the specific

function signal (auto ranging) can automatically select the best sensitivity range to avoid

electrical noise which may cause unstable Hz reading. However, if the Hz reading shows

zero due to insufficient sensitivity, activate the Hz function BEFORE measuring the

specific function signal. The meter is then in the lowest range and can select the highest

sensitivity.