7 Carrying out a measurement
15
7.4.
Measuring resistance, capacitance,
continuity and diode test
WARNING
Serious risk of injury to the user and/or destruction of the instrument
during resistance testing.
> Test object must be de-energized.
External voltages will distort the measurement result.
7.4.1.
testo 770-1/-2
Manual measuring mode
1. Switch instrument on: set rotary switch to
.
-
The instrument is switched on.
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 is in
Ω
measuring mode.
3. Switch between resistance, capacitance, continuity and diode test:
press
[
]
<1 s.
-
The measured value is shown on the LC display.
7.4.2.
testo 770-3
Automatic measuring mode
Automatic detection for resistance/capacitance in the following
range:
•
0.0 ohms to 6.000 mohms
•
0.500 nF to 600.0 µF
Change to manual measuring mode for the remaining measuring
range.
1. Switch instrument on: set rotary switch to
.
-
The instrument is switched on.
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 is in
AUTO RCDC
measuring mode.
-
The instrument detects resistance, continuity, diode and capacitance
and automatically adjusts the measuring range.
-
The measured value is shown on the LC display.
Manual measuring mode
3.
Disable
AUTO RCDC
measuring mode: press
[
]
<1 s.
4. Switch between resistance, capacitance, continuity and diode test:
press
[
]
<1 s.
-
The measured value is shown on the LC display.
> Switch
back
to
AUTO
mode: press
[
]
>2 s.
