Sanwa PC720M, Instruction Manual

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(Max. rated input voltage: 1,000V dc/ac,
Initial impedance: 3 kΩ)
• Automatic measurement for Ω
・
V under Low Impedance
This AutoΩ
・
V function automatically selects measurement
function of DCV, ACV or Ω (Resistance) based on the input
between the test leads.
• With no input, the meter displays “Auto” when it is ready.
• When a signal out of -1.0 to 1.5V dc or 3V ac up to the rated
1,000V is present, the meter displays the voltage value in
appropriate DC or AC, whichever larger in peak magnitude.
• With no voltage signal but a resistance below 60MΩ is
present, the meter displays the resistance value. When below
the continuity threshold (20Ω to 300Ω) is present, the meter
further gives a continuity beep tone.
Auto Ω
・
V mode input impedance increases abruptly from initial 3kΩ
to a few hundred kΩ’s on high voltage hard signals. “LoZ” displays on
the LCD to remind the users of being in such low impedance mode.
Peak initial load current, while probing 1000V ac for example, can
be up to 471mA (1000V x 1.414 / 3kΩ), decreasing abruptly to approx.
3.1mA (1000V x 1.414 / 460kΩ) within a fraction of a second.
Do not use AutoΩV mode on circuits that could be damaged by
such low input impedance. Instead, use function selector or
high input impedance voltage modes to minimize loading for such
circuits.
WARNING