Technical data

4.1.6 Zero calibration
Calibration menu
The Zero Calibration dialog allows you to zero a Daniel Liquid Ultrasonic meter that is in a
no flow condition.
When the dialog is displayed, Daniel MeterLink will start reading and charting the flow
velocity measured by the meter. The status LEDs will also be updated to report any
warnings or alarms.
Zero flow calibration
Before Performing a Calibration
1.
If this is a first time start up of a meter, run enough flow through the meter to
remove any trapped air from the meter and from the face of the transducers before
blocking in the meter.
2. Make sure the entire volume of the meter is full of the process fluid.
3. Allow enough time after blocking in the meter before starting the calibration to
make sure there is no flow through the meter.
4. The meter velocity reported by Daniel MeterLink should be stable and very close to
zero flow.
Calibration options
Before starting the zero calibration, you can adjust Zero time which is the length of time
the Daniel MeterLink collects data from the meter for the calibration. Lowering this value
can increase the chance of passing the calibration but may produce a lower quality
calibration. Increasing this value may decrease the chance of passing the calibration but
may improve the quality of the calibration. Four minutes is the recommended amount of
time to perform a zero calibration. The time can be adjusted from 2 minutes to 10
minutes.
Select Generate report after writing zero calibration to meter if you want an Excel
®
report
of the “As Found” and “As Left” calibration parameters. The meter's extended
configuration data points are included in the report. All the data collected during the
calibration will also be saved to the meter. This option is only available if Microsoft
®
Excel
®
is installed on the computer running Daniel MeterLink. If you do not select this option or it
is not available, the calibration parameter changes are still recorded in the meter's Archive
Audit log.
The extended configuration includes some read-only data points that help describe the
meter's configuration. Read-only data points are displayed with a gray background for
reference only and cannot be changed. The extended configuration data points are
viewable in the Maintenance Logs Report, Archive Logs Report, Flow Calibration, Zero
Calibration dialogs and the Edit/Compare Configuration tool.
Performing a Calibration
1. Use the Calibration|Zero Calibration menu.
Daniel Liquid Ultrasonic Flow Meters calibration and configuration parameters
38 Daniel 3810 Series Operations Manual