M140 Multifunction Calibrator / Tester - meatest.cz

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M-140 Multifunction Calibrator MEATEST Start of measurement To start a measurement: • Press INPUT direct control button in the basic state of the calibrator. • INPUT field on the display shows the measured value. The measurement is indicated by a green LED above the INPUT button. • Press INPUT button again to stop the measurement. The LED goes off and the input connectors are disconnected. The multimeter does not display uncertainty of measuring. If the input range is exceeded, OVERFLOW message is displayed. 140-41 Cable adapter must be used to connect the signal. Zero function The multimeter has a zeroing function. It can be activated after the measurement was activated by pressing INPUT direct control button. Zeroing is performed by pressing METER direct control button. After the button is pressed, most recent value is stored and subtracted from all ongoing measured values. A “Zero” message appears on the right side of the display, indicating that this function is active. Press METER a second time to deactivate the Zeroing function. Multimeter’s menu can be entered only after the measurement is terminated by pressing INPUT button. 42 Operation manual v42
MEATEST M-140 Multifunction Calibrator Zeroing function can be used e.g. to compensate the voltage drops at the cables, to suppress any remanent value of the signal etc. Overloading can damage the multimeter. Notes: * The current inputs of the multimeter are protected from current overloading by a fuse located in 140-41 cable adapter. The fuse can be replaced after turning the cap of the fuse holder. The procedure is described in the adapter’s manual. * The multimeter can be used as a DC milivoltmeter with 20 mV, 200 mV, 2 V, 10 V ranges. The appropriate input terminals are PTHU and PTLU. * Maximum allowed voltage on the input terminals against ground terminal is 20 V. * Frequency measurement is possible up to 15 kHz. Input signal must be within 0.2 to 5 V range. squarewave or pulse shape of the input signal is expected. Operation manual v42 43
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M140 Multifunction Calibrator / Tester - meatest.cz

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