5 Overview
8
17 Analog display (testo 770-3 only)
18 Indication of polarity in bar chart (testo 770-3 only)
5.3.
Control key functions
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 setting, the instrument is in
AUTO
mode when voltage,
current, RCDC (resistance, capacitance and diode with continuity) is being
measured.
Key
Brief
keypress
function
(<1 s)
Long keypress
function
(>2 s)
Zero
adjustment
Zeroing when measuring DC
current
Exit zero adjustment
Select
Switches between the
manual sub-modes of the
selected measurement.
Back to
AUTO
mode
Min/Max
Switches between MAX, MIN
and AVG functions
Switch off recording mode
Inrush
If position
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 activated before
INRUSH
was selected.
Illumination
Background illumination
on/off
(testo 770-3)
Illumination/
Bluetooth
Background illumination
on/off
Bluetooth on/off
5.4.
Rotary switch functions
Selection
Function
Switch off
Switch the instrument off.
Current
Activates automatic mode for current, choose between
AC/DC. Manual selection of AC/DC with
[
]
.
Voltage
Activates automatic mode for voltage between AC and DC
measurement via the test leads and jacks. Manual selection of
AC/DC with
[
]
.
