Checkline MK-720 - Manual (Page 11)

Introduction The outline and measurement principle
This instrument measures and memorizes the corona discharge accompanying insulated degradation.
Insulated degradation is told according to the sound pressure state of corona discharge.
If the corona discharge accompanying insulated degradation of AC-power-supply equipment arises, an ultrasonic wave will
occur over a broadband.
Since this ultrasonic wave produces strength synchronizing with a power supply phase, if frequency analysis is conducted
after detecting detection sound, the double ingredient of power supply frequency will appear strongly.
With this instrument, electric discharge can be detected by detecting the strength of the double ingredient of this power
supply frequency, without being subject to the influence of sound other than electric discharge.
Chapter 1 Preparation before use
◆
1.1 Names and functions of parts
◆◆
1.1.1 Main unit
◆◆
1.1.2 LCD screen
Parabolic antenna Sensor (inside)
Laser pointer
・ It lights on checking
Trigger
(Red button)
・
To turn on, push
2 seconds or
more.
・ MK-720 detects
while you push
this button
Grip
・
It has battery holder
inside.
Grip end cap
LCD screen
・
It displays
measured data
etc.
Function button 1
(Blue button)
・ To memorize
data
・ To change settings
Earphone Jack
・
You can check discharge
through earphone.
Function button 2
(White button)
・ To turn off
・
To change range
・ To change setting items
USB jack
・ MK-720 can output data via USB cable.
Buzzer
・
It sounds for
alarming.
Strap holder
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