Preparation And Caution Before Measurement; Voltage Measurement; Current Measurement - Iso-Tech IDM201N Instruction Manual

4.2 Preparation and Caution before Measurement

1. Wait 30 seconds after turning on the instrument before making a measurement.
2. Set the rotary switch to the required function before connecting the probes to the circuit or equipment under test. Remove the test leads from the
circuit or equipment under test before changing the rotary switch position.

4.3 Voltage Measurement

1. Connect the BLACK test lead to the COM terminal and the RED test lead to the "VΩHz" terminal. Set the Rotary switch to the a.c. V
or d.c. V position.
3. Connect the test leads across the source or load under test. The polarity of the RED lead connection will be indicated at the same time as the
voltage is displayed. A buzzer will sound if the input voltage exceeds the maximum input voltage in either auto or manual range modes. In an
over-range condition, the MSD (most-significant digit) of the LCD display flashes and the three least-significant digits will indicate zero.

4.4 Current Measurement

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CaUTIoN: The instrument can measure up to 20A, but for currents greater than 10A the maximum measurement duration is 30 seconds
in any 10 minute period.
1. When measuring current of less than 200 mA, connect the BLACK test lead to the COM terminal and the RED test lead to the "mA" terminal.
When measuring current greater than 10A, connect the RED test lead to the "A" terminal. The instrument can measure up to 20A, but maximum
measurement duration is 30 seconds in any 10 minute period for currents greater than 10A.
2. Set the rotary switch to the range required (200μA - 200mA) for the current to be measured. Use the function button to select ac or dc mode
as required.
NoTe: If the current to be measured is not known, start at the highest range and reduce the range as required.
3. Connect the test leads in series with the circuit to be measured.
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