5 Overview
9
5.3 Control key funcons
The clamp meter features a rotary switch, as well as 6 control keys, which respond
to a brief or a long keypress.
In the default seng, the instrument is in AUTO mode when voltage, current
(testo 770-1/-2/-3 (0590 7703)), RCDC (resistance, capacitance and diode with
connuity) is being measured.
Brief keypress function (<1 s)
Long keypress function (>2 s)
Zeroing when measuring DC
current or DC power
Switches between the manual sub-
modes of the selected
measurement.
Switches between MAX, MIN and
AVG funcons
If posion A is selected, the
instrument switches to inrush
mode.
Reset the inrush measurement if a
measurement is already shown on
the LC display.
Switches back to the mode most
recently acvated before
INRUSH was selected.
Background illuminaon on/o
(testo 770-3)
Illuminaon/
Bluetooth
Background illuminaon on/o
5.4 Rotary switch funcons
Switch the instrument o.
Acvates automac mode for current (testo 770-1/-2/-3
(0590 7703)), choose between AC/DC. Manual selecon of
AC/DC with [ ].
Acvates automac mode for voltage between AC and DC
measurement via the test leads and jacks. Manual selecon of
AC/DC with [ ].