KYORITSU 4140 - Manual (Page 25)

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9. Volts
1.OperatethePowerswitchandturnontheinstrument.Pressthe
VOLTSfunctionswitch.
2.InserttheTestLeadsintotheinstrument.(Fig.9-1)
Fig.9-1
3.VoltagevalueandfrequencywillbedisplayedontheLCDwhen
applyingACvoltage.
Fig.9-2
10. Back Light
Pressing the Back Light Switch selects Backlight ON / OFF.
Backlight automatically turns off in 2 minutes after it turns on.
11. Auto-Test
The Test Switch is locked when the switch is pressed down for 3
sec.TheredLEDontheswitchwillflash.Inthisautomode,when
using distribution board lead Model 7246, tests are conducted by
simply disconnecting and reconnecting the red phase prod of the
Model 7246 avoiding the need to physically press the test button
i.e.'handsfree'.
Frequency
Voltage