Velleman DCM100, Руководство пользователя, Страница: 6 / 84

DCM100
V. 04 – 25/02/2020 6 ©Velleman nv
• Disconnect the test leads from the tested circuit before rotating the
range selector in order to change functions.
• When carrying out measurements on a TV set or switching power
circuits, always remember that the meter may be damaged by any high
amplitude voltage pulses at test points.
• Always be careful when working with voltages above 60 VDC or 30 VAC
rms. Keep your fingers behind the probe barriers at all times during
measurement.
• Never perform resistance, diode or continuity measurements on live
circuits. Make sure all capacitors in the circuit are depleted.
• Always hold the device behind the finger guard (see General
Description, nr. 12).
• Comply with the local and national safety regulations. Use personal
protective equipment, such as approved rubber gloves, face protection
and flame-resistant clothing, to prevent shock and arc blast injury
where hazardous live conductors are exposed.
• Do not use this device to measure a current with a frequency
above 1 kHz.
• Only use this device as specified in this manual in order not to
compromise the protection supplied by the device.
6. General Description
Refer to the illustration on page 2 of this manual:
1. Clamp jaws
2. Clamp trigger
3. Selection button
4. M-hold button
5. D-hold button
6. Selection switch
7. Display
3 ½ digits
8. “COM” jack
Insert the black (negative) test lead.
9. “V  ” jack
Insert the red (positive) test lead in this connector to measure voltage,
resistance and frequency.
7. Overvoltage/Installation Category
DMMs are categorized depending on the risk and severity of transient
overvoltage that might occur at the point of test. Transients are short-lived
bursts of energy induced in a system, e.g. caused by lightning strike on a
power line.