KYORITSU KEW 2003A - Preparation for Measurement; Checking Battery Voltage; Checking Switch Setting

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5. Preparation for Measurement
5-1CheckingBatteryVoltage
 SettheFunctionSelectorswitchtoanypositionotherthan"OFF".
When the display is clear without   showing, proceed to
measurement.
 Whenthedisplayblanksor  isshown,replacethebatteries 
accordingtosection
8:BatteryReplacement 
NOTE
The Sleep function automatically turnstheinstrument off in a
certainperiodoftimeafterthelastswitchoperation.Therefore,the
display may be blank with the Function Selector switch set to a
positionotherthan"OFF".
To operate the instrument in this case, set the switch back to the
"OFF"position,thentothedesiredposition,orpressanybutton.If
the display still blanks, the batteries have exhausted. Replace the
batteries.
5-2CheckingSwitchSetting
Makesurethat the Function Selector switch issettothecorrect
position, the instrument is set to the correct mode and the Data
Hold function is deactivated. Otherwise, desired measurement
cannotbemade.