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Center 22 - Inrush Current Measurement; Low Pass Filter Application; Non-Contact Voltage Detection; Battery Replacement

Center 22
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The Low-Pass Filter is a filter that passes signals with a frequency lower
than a certain cutoff frequency and attenuates signals with frequencies
higher than the cutoff frequency.
The Low-Pass Filter offers a cut-off frequency of 160Hz (approx.)
(3) Low Pass Filter:
11
Press and hold the “ ” button for 2 seconds to access the
Inrush current mode. The LCD display will show “INRUSH”, “ ---- ” until
the motor starting up for a 100ms period and being detected (5A above).
The detection will be done only on time and the output reading will be
hold.
(2) Inrush Current Mode:
(4) Non-Contact Voltage (NCV):
DANGER!
The LCD and beeper may not be displayed due to installation
condition of electrical circuit or equipment. Never touch the
circuit under test to avoid possible danger even if the LCD and
beeper for NCV is not displayed. Check the functionality of LCD
and beeper on a well-known power supply prior to measurement.
When the LCD and beeper doesn’t indicate, do not make
measurement.
NCV indication is affected by external voltage, and how the
meter is held or placed.
Replacing Battery
2each
AAA/R03
batteries
Press the “ ” button to
access the NCV measurement
mode.
Annunciate and EF will
appear on the display.
When no or less electric field is
detected, the LCD shows “ EF ”.
If the detector senses electric
field, the strength will be showed
on LCD by “ - ” with beep.
Level 1(weak) is “ - ” and the
level 4(strong) is “ - - - -.
The beeper frequency depends
on the strength of electric field also.
Place the edge of the jaw labeled
“ ” near the electric field.
1. When the battery voltage drops below proper operation range, the symbol
will appear on the LCD and the battery needs to be replaced.
2. Before replacing the battery, power off the meter .
3. Open the battery door by a screwdriver.
Replace the old batteries with two UM-4 or AAA size batteries.
4. Close the battery door and fasten the screw.

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