1 Contents
3
7.3 Voltage measurement .............................................. 19
7.3.1 Automac measuring mode ............................ 19
7.3.2 Manual measuring mode ................................ 20
7.4 Measuring resistance, capacitance, connuity and
diode test ................................................................. 20
7.4.1 testo 770-1/-2 ................................................. 20
7.4.1.1 Manual measuring mode .................. 20
7.4.2 testo 770-3 ...................................................... 21
7.4.2.1 Automac measuring mode .............. 21
7.4.2.2 Manual measuring mode .................. 21
7.5 Power measurement (testo 770-3 only) .................... 21
7.6 Frequency measurement .......................................... 22
7.7 Temperature measurement (oponal)
(testo 770-2/-3 only)................................................. 22
7.7.1 Carrying out temperature measurement ........ 23
7.8 Inrush current (INRUSH) ........................................... 23
8 Service and maintenance ..................................................... 24
8.1 Replacing the baeries ............................................. 24
8.2 Maintenance ............................................................ 24
8.3 Calibraon ............................................................... 25
8.4 Storage ..................................................................... 25
8.5 Cleaning ................................................................... 25
9 Technical data ...................................................................... 26
9.1 General technical data .............................................. 26
9.2 More technical data ................................................. 27
9.2.1 testo 770-1/-2 ................................................. 27
9.2.2 testo 770-3 (0590 7703) .................................. 28
9.2.3 testo 770-3 (0590 3770 – as of 2024) .............. 30
9.3 Bluetooth module (testo 770-3 only) ........................ 33
10 Tips and assistance ............................................................... 34
10.1 Quesons and answers ............................................. 34
10.2 Accessories and spare parts ...................................... 34
11 Protecng the environment.................................................. 34