4 Operation
4.1 General Timing Specifications
4.1.1 Startup Time
After power-on a LEVIFLOW
®
converter startup sequence with information about converter type, firmware
version and baud rate is proceeded. During this sequence flow measurement is not performed. Start-up time
is about 8 seconds for every converter type.
4.1.2 Thermal Stability Time
To guarantee specified accuracy thermal stability of sensor has to be reached. Therefore it is recommended
to wait 30 minutes after power-on of converter or after connecting a new sensor to the converter.
4.1.3 Zero Adjustment Activation Time
There are three possibilities to activate zero adjustment:
1. Activating by LEVIFLOW
®
configuration software: Zero adjustment starts immediately after
pressing corresponding button
2. Activating by re-zero button on converter front (see Figure 15c resp. Figure 17d): button has to be
pressed during 3 seconds to initiate zero adjustment.
3. Activation by digital input (default configuration): digital input has to be active during 3 seconds to
initiate zero adjustment.
4.1.4 Automatic Zero Adjustment duration
The duration to perform an automatic zero adjustment is converter-type specific:
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