KYORITSU KEW 2003A, Инструкция по эксплуатации

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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.