KYORITSU 4202 - Manual (Page 15)

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8. Other functions
8-1 Auto power-off function
This function is to prevent the instrument from being left turned on and conserve
battery power. The instrument automatically turns off about 10 minutes after the
last button operation.
To return to the normal mode, press the Power button again and turns on
the instrument.
◇ The buzzer sounds before the instrument turns off.
◇ To disable the auto power-off function, follow the procedure below.
(1) Turn on the instrument by pressing the Power button with the Data hold
button pressed down. Then release the Power button only.
(2) The instrument is turned on, and " " is displayed on the LCD for
about 1 second.
Now, the auto power-off function is disabled.
To enable the auto power-off function again, turn off and on the instrument
without pressing the Data hold button.
8-2 Data hold function
This function is to freeze the indicated value on the display. When the Data hold
button is pressed once, the indicated value on the LCD is fixed and does
not change even though current under test varies.
The " " symbol is shown at the upper right on the LCD. To exit the Data hold
mode, press the Data hold button again. (" " symbol disappears.)
◇ When the Auto power-off function works while the instrument is in the Data
hold mode, data hold is cancelled.
8-3 Buzzer function
This function is to give audible warning to user when the measured earth
resistance is 10Ω or less. To enable this function, press the Function button
at the earth resistance function at least 2 seconds. ( The " " symbol is
displayed at the lower left on the LCD.)
Buzzer sounds when the measured earth resistance is 10Ω or less.
To disable the buzzer function, press the Function button again.
(Then, the " " symbol disappears.)
8-4 Backlight function
This function is to view the test results in dimly lit areas.
To switch on the backlight, press the Backlight button while the instrument
turned on.
To switch off the backlight, press the Backlight button again.
◇ Backlight is automatically switched off in about 1 minute to conserve battery
power.