20  Settings
FLUXUS H721  20.2  Measuring modes
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UMFLUXUS_H721V1-5EN, 2022-05-15
Toggle time
The toggle time indicates the time interval after which the transmitter toggles between the different channels during the 
measurement. The default value is 3 s.
• Press ENTER until the menu item Toggle time is displayed.
• Enter a different toggle time value if the default value is no to be used.
• Press ENTER.
This value remains stored until a new toggle time is entered.
Primary display value
• Press ENTER until the menu item Primary display value is displayed.
•Select Flow quantity to display the selected physical quantity value as primary value during the measurement. Select 
Totalizer to display the totalizer value as primary value during the measurement.
• Press ENTER.
Switching off the display backlight
• Press ENTER until the menu item Light autom. off is displayed.
•Select Yes to activate the automatic switch-off.
• Press ENTER.
If the automatic switch-off of the display backlight is activated, the backlight is switched off after about 30 s. When 
pressing a key or connecting a USB cable, the backlight is switched on again.
20.2 Measuring modes
• Select the menu item Measurement in the program branch Special functions.
• Press ENTER.
• Select the menu item Measurement modes.
• Press ENTER.
Enabling the HPI measurement
•Select On to enable the HPI measurement and Off to disable it.
• Press ENTER.
• Enter the temperature according to the local reference conditions (default value: 20 °C).
• Press ENTER.
• Enter the pressure according to the local reference conditions (default value: 1 bar).
• Press ENTER.
For further settings, see section 9.1.
Special functions\Dialogs/Menus\Toggle time
Special functions\Dialogs/Menus\Primary display value
Special functions\Dialogs/Menus\Light autom. off
Special functions\Measurement\Measurement modes
Special functions\Measurement\Measurement modes\HPI measurement
Special functions\Measurement\Measurement modes\Reference temp.
Special functions\Measurement\Measurement modes\Reference pressure