CALIBRATION MENU
Calibration
The Calibration menu contains a powerful multi-point routine for calibrating the transmitter to a primary
measuring standard in a particular installation. To initialize the three-step calibration routine, click Calibration.
Figure 51: Calibration Page 1 of 3
The first screen, Page 1 of 3 establishes a baseline zero flow rate measurement for the transmitter.
Remove the Zero Oset
Because every transmitter installation is slightly different and sound waves can travel in slightly different ways through these
installations, it is important to remove the zero offset at zero flow to maintain the transmitter’s accuracy. The zeroing process
is essential in systems using the DTTS and DTTC transducer sets for accuracy. To establish zero flow and eliminate the offset:
1. Establish zero ow in the pipe (verify that the pipe is full of uid, turn o all pumps, and close a dead-heading valve). Wait
until the delta time interval shown in Current Delta T is stable (and typically very close to zero).
2. Click Set.
3. Click Next when prompted, then click Finish to advance to Page 2 of 3.
Select Flow Rate Units
Use Page 2 of 3 to select the engineering units for the calibration.
1. Select an engineering unit from the Flow Rate Units drop-down menu.
2. Click Next to advance to Page 3 of 3.
Figure 52: Calibration page 2 of 3
Calibration Menu
Page 60 May 2016TTM-UM-00136-EN-06
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