Power-Up Options; Automatic Power-Off; Input Alert™ Feature; Low Pass Filter (87) - Fluke 80 Series V Getting Started Manual

Power-Up Options

Holding a button down while turning the Meter on activates a power-up
option. Table 4 includes the power-up options.

Automatic Power-Off

The Meter automatically turns off if you do not turn the rotary switch or
press a button for 30 minutes. If MIN MAX Recording is enabled, the
Meter will not power off. To disable automatic power-off, refer to
Table 4.
Input Alert™ Feature
If a test lead is plugged into the mA/ A or A terminal, but the rotary
switch is not set to the correct current position, the beeper warns you by
making a chirping sound and the display flashes "LEAd". This warning is
intended to stop you from attempting to measure voltage, continuity,
resistance, capacitance, or diode values when the leads are plugged into
a current terminal.
W
Placing the probes across (in parallel with) a powered
circuit when a lead is plugged into a current terminal can
damage the circuit you are testing and blow the Meter's
fuse. This can happen because the resistance through the
Meter's current terminals is very low, so the Meter acts like
a short circuit.
Caution

Low Pass Filter (87)

The 87 is equipped with an ac low pass filter. When measuring ac voltage
or ac frequency, press A to activate the low pass filter mode (K).
The Meter continues measuring in the chosen ac mode, but now the signal
diverts through a filter that blocks unwanted voltages above 1 kHz, refer to
Figure 2. The lower frequency voltages pass with reduced accuracy to the
measurement below 1 kHz. The low pass filter can improve measurement
performance on composite sine waves that are typically generated by
inverters and variable frequency motor drives.
XWWarning
To avoid possible electric shock or personal injury, do not
use the Low Pass Filter option to verify the presence of
hazardous voltages. Voltages greater than what is indicated
may be present. First, make a voltage measurement
without the filter to detect the possible presence of
hazardous voltage. Then select the filter function.
In Low Pass Mode, the Meter goes to manual mode. Select
ranges by pressing the RANGE button. Autoranging is not
available in Low Pass Mode.
1 kHz
100 Hz
Figure 2. Low Pass Filter
Multimeters
The Meter's Features
Note
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