TESTO 760 - Performing Measurements; Measurement Preparation; Voltage Measurement

7 Carrying out a measurement
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> Disable power-off function: Before switching on the instrument, press
and hold down [] and then briefly press []. Release the keys
simultaneously.
- Power-off function is disabled.
Once the instrument has switched off, the power-off function is
reset to the default setting.
Manually
> Switch the instrument off: press [] >2 s.
7 Carrying out a measurement
7.1. Preparing for measurement
Prior to every test, please ensure that the instrument is in perfect condition:
• For example, keep an eye out for broken housing or leaking batteries.
• Always carry out a function test before using the instrument, see below.
• Check that the instrument is functioning perfectly (for example at a
known voltage source) before and after every test.
• If the safety of the user cannot be guaranteed, the instrument must be
switched off and secured to prevent unintentional usage.
When connecting the test leads to the test object, always connect
the common test lead (COM) to the test object first of all. When
disconnecting the test leads, always disconnect the test lead from
the 10 A, V or mA jack (testo 760-2/-3) first of all.
Installing the probe tip protector
The probe tip protector can be removed/installed as required.
Attention: Use of the probe tip protector may be required depending on the
national regulations or provisions!
> Probe tip protector: push onto probe tips or pull off.
7.2. Voltage measurement
✓ Instrument is switched on.
When measuring AC voltage, the frequency is measured at the
same time and shown in the relevant row on the LC display. .
Automatic measuring mode
1. Connect test leads: black test lead to the COM jack; red test lead to the
V/Ω/diode/capacitance jack.
The instrument features a built-in zero crossing detector. When the
measured signal (voltage or current) indicates zero crossings, the
instrument automatically switches to AC measuring mode. If no
continuity is indicated, the instrument switches to DC measuring
mode.
2. Connect test lead to the test object.
- The measured value is shown on the LC display.