7 Performing the measurement
36
Values for current, voltage and power can be transferred from the
testo 770-3 clamp meter.
7.9 Activating the differential temperature
Differential temperature enables the temperatures between two measuring
points to be calculated.
1 - Open Menu.
2 - Move the joystick down and select Measurement. Then press OK or
move the joystick to the right.
3 - Move the joystick down and select Differential temperature. Then
press OK.
4 - Move the joystick down/up and select which differential temperature
is to be calculated (Point-Point, Point-Probe, Point-Value, Point-
RTC). Then press OK.
4.1 - Point-Point selection:
o Move the joystick to the right -> select measuring point 1 ->
press OK -> move the measuring point to the live image using
the joystick -> press OK.
o Move the joystick to the right -> select measuring point 2 ->
press OK -> move the measuring point to the live image using
the joystick -> press OK.
o End measurement: move the joystick to the right, press End.
4.2 - Point-Probe selection:
o Move the joystick to the right -> select measuring point 1 ->
press OK -> move the measuring point to the live image using
the joystick -> press OK.
o End measurement: move the joystick to the right, press End.
4.3 - Point-Value selection:
o Move the joystick to the right -> select measuring point 1 ->
press OK -> move the measuring point to the live image using
the joystick -> press OK.
o Move the joystick to the right, set the value manually.
o End measurement: move the joystick to the right, press End.
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