Voltcraft vc 890 oled digital multimeter voltcraft vc 890 oled p the voltcraft vc 890 is an oled digital multimeter that is sturdy reliable practical and more importantly safe for the user with approvals up to 1000v in cat iii or 600v in cat iv p p the measuring functions are selected using the rotary switch the measuring range selection is automatic for all measuring functions except for diode and continuity test manual setting is possible at any time p p the vc890 displays tru