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Hi/Lo LIMITS mode
Press Hi/Lo LIMITS key to enter the Hi/Lo Limits comparative mode,
"LIMIT" is displayed. In the this mode the automatic power-off feature is
disabled and other funtion key are disabled, when input temperature value
exceed Hi. The beeper emits a continuity pulse tone and "Hi" is displayed,
and when input temperature value exceed Lo value. The beeper emits a
discontinuous pulse tone and "Lo" is displayed. Press Hi/Lo LIMIT key again
to exit the Hi/Lo LIMIT mode.
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