Press "HOLD" button,
the reading in the display.
⑾Power button
Turn the meter power ON/OFF
⑿
External DC 9V power supply
terminal
For connection with DC 9V power supply.
Aperture size: external diameter: 3.5mm,
internal diameter: 1.35mm
⒀USB interface
USB
interface.
⒁ AC/DC
signal output is a 9600 bps serial
signal output earphone outlet
The hold function freezes
15