TESTO 770 - Measuring Microamps (testo 770-2;-3); Voltage Measurement

7 Carrying out a measurement
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7.2.2 Measuring µA AC or µA DC (testo 770-2/-3 only)
7.2.2.1 Automac measuring mode
For every DC current measurement always zero the instrument with
[ ] before measuring.
1. Switch instrument on: set rotary switch to .
- The instrument switches on.
- The instrument is in AUTO µA mode.
2. Connect test leads: black test lead to black jack, red test lead to red jack.
Then connect test leads to the test object.
- The instrument automacally detects the µA AC or µA DC mode.
- The measured value is shown on the LC display.
7.2.2.2 Manual measuring mode
For every DC current measurement always zero the instrument with
[ ] before measuring.
✓ Instrument is in automac measuring mode AUTO µA.
1. Exit AUTO µA measuring mode: press [ ] <1 s.
2. Switch between µA AC and µA DC: press [ ] <1 s.
- The measured value is shown on the LC display.
Switch to automac measuring mode: press [ ] >2 s.
- The instrument is in automac measuring mode when AUTO is illuminated
on the LC display.
7.3 Voltage measurement
When measuring AC voltage, the frequency is measured at the same
me and shown in the relevant row on the LC display.
7.3.1 Automac measuring mode
1. Switch instrument on: set rotary switch to .
- The instrument switches on.
- The instrument is in AUTO V mode.