2-10
IM 710105-03E
2.4 Connecting the Probe
WARNING
• Always turn off the power of the device under measurement before connecting the
device under measurement to the instrument. It is extremely dangerous to connect
or disconnect a measuring lead while the device under measurement is on.
• Do not apply an input voltage that exceeds the maximum input voltage,
withstand voltage, or allowable surge voltage.
• To avoid electric shock, be sure to ground the instrument, and connect the ground
of the probe and input connector to the ground of the item being measured.
• Avoid continuous connections in environments in which a voltage surge may occur.
• If over-range is indicated, the DLM2000 may be receiving a voltage higher
than the observed waveform or measured waveform values.* To prevent
electric shock, change the vertical scale with the SCALE knob so that the entire
amplitude of the waveform is displayed within the waveform display area, and
check the input voltage level.
* If the input coupling is set to AC, the over-range indicator may not be displayed. For
details, see section 1.1, “Setting the Input Coupling,” in the user’s manual, IM 710105-
02E.
Over-range indication
CAUTION
• The probe interface terminals are located near the input terminals on this
instrument. Do not short the probe interface terminals. When you connect a
probe, make sure to prevent an excessive voltage caused by static electricity,
etc., from being applied to the probe interface terminal, as this may damage the
terminal.
•
The maximum input voltage for 1 MΩ input is 150 Vrms when the frequency is
less than or equal to 1 kHz. Applying a greater voltage may damage the input
section. For frequencies above 1 kHz, damage may occur even if the voltage is
less than 150 Vrms.
•
The maximum input voltage for 50 Ω input is 5 Vrms or 10 Vpeak. Applying a
voltage greater than either of these limits may damage the input section.
• For information about how to handle a probe, refer to the user’s manual that
came with the probe.
