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Instrument and meter
939 Conventional System Error # 21
939 Conventional System Error # A1
939 reading light is too dim, please replace it in time
SP60 reading light is too dim, please replace it in time
SP62 reading light is too dim, please replace it in time
SP64 reading light is too dim, please replace it in time
SP60 Conventional System Error # A1
SP60 Conventional System Error # 21
SP62 Conventional System Error # A1
Successful operation!
