UT61E digital multimeter schematics and integrated circuit datasheet

ES51922 application circuit for ES51922 datasheet. In UT61E 1some features of ES51922 are not used and can be enabled by simple hardware diy: 112 APOSEL I Idle time selection for auto power off feature. 58 SLEEP O Sleep mode indicator, asserts low in SLEEP mode. 105 BKOUT O If BKLIT function is enabled, this pin will change from –3V to +3V For 60 sec, once press BKLIT pin again within 60 sec, this pin will Change back to –3V 102 BKLIT I Back light function. Pulse low to set BKOUT…

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