KYORITSU 2009A - Manual (Page 24)

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７−１ Sleep Function
CAUTION
●The instrument consumes small amount of battery power in the
sleep mode. Make sure to set the function selector switch to the
OFF position after use.
This is a function to prevent the instrument from being left powered
on in order to conserve battery life. This function causes the
instrument to enter the Sleep (powered-down) mode about 30
minutes after the last switch or button operation.
To exit the Sleep mode, turn the function selector switch back to
"OFF", then to any other position, or press any button.
NOTE
● Connecting the plug to the OUTPUT terminal disables the Sleep
function. The function is enabled on removing the plug from the
terminal.
● The Sleep function is disabled in the PEAK measurement mode.
７−２ Data Hold Function
This is a function used to freeze the measured value on the display.
Press the Data Hold button to freeze the reading. The reading will be
held regardless of subsequent variation in input. "H" is shown on the
upper right corner of the display while the instrument is in the Data
Hold mode.
To exit the Data Hold mode, press the Data Hold button again.
７．Other Functions