Multimeter ICs/Cyrustek ES519xx

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This page gives an overview of the various Cyrustek ES519xx DMM ICs, and especially their protocol specifics.

Overview

Device Counts Serial #Bytes #Digits
ES51922 22000 19230/7o1 14 5
ES51978 4000 2400/7o1 11 4
ES51986 6000 19230/7o1 11 4

STATUS byte

STATUS bits 6 5 4 3 2 1 0
ES51922 0 1 1 Judge Sign BATT OL
ES51978 0 1 1 Judge Sign BATT OL
ES51986 0 1 1 Judge Sign BATT OL

OPTION1 byte

OPTION1 bits 6 5 4 3 2 1 0
ES51922 0 1 1 MAX MIN REL RMR
ES51978 0 1 1 0 0 0 VAHZ
ES51986 0 1 1 HOLD MAX MIN 0

OPTION2 byte

OPTION2 bits 6 5 4 3 2 1 0
ES51922 0 1 1 UL PMAX PMIN 0
ES51978 0 1 1 DC AC AUTO APO
ES51986 0 1 1 DC AC AUTO 0

OPTION3 byte

OPTION3 bits 6 5 4 3 2 1 0
ES51922 0 1 1 DC AC AUTO VAHZ
ES51978
ES51986

OPTION4 byte

OPTION4 bits 6 5 4 3 2 1 0
ES51922 0 1 1 0 VBAR HOLD LPF
ES51978
ES51986