Measuring; Changing The Measurement Channel Display; Freezing A Reading, Displaying The Maximum/Minimum Value - TESTO 425 Instruction Manual

◄
1 Press
MENU/ENTER:
o
NO: Do not carry out reset.
o
YES: Carry out reset. The instrument is reset to the factory
settings.

The instrument returns to measurement view.

Measuring

The instrument is switched on and is in the measurement view.

1 Position the probe.
The arrow mark on the probe head
must point in the direction of flow.
The correct measurement value is
determined by rotating the probe
slightly in both directions until the
maximum value is displayed.
2 Read the measured values on the display.
Changing the measurement channel
display
1 - Switch between the display of temperature (°C, °F) and calculated
volume flow (m3/h, l/s, cfm):
►
Press
Freezing a reading, displaying the
maximum/minimum value
The current reading can be frozen. The maximum and minimum values since
the last time the instrument was switched on in the standard view or during a
multi-point or continuous measurement can be displayed.
◄
1 Press

The following are displayed in turn:
o
Hold: frozen measured value
o Max: Maximum value
►
/ to select the required option and confirm with
.
several times until the desired value is displayed.
7 Using the product
15