Yokogawa digitalYEWFLO (DY) - Manual (Page 54)

MAINTENANCE
IM 1F2B4-01-YIA
Page 58
IV. MAINTENANCE
4.1 H OW TO ...
The following how to lists are described in this chapter.
4.1.1 Communicating with the YEWFLO remotely
4.1.2 Adjusting zero and span
4.1.3 Using self-diagnostics
4.1.4 Simulating an output/performing a loop check
4.1.5 Changing the output mode to analog or pulse
4.1.6 Increasing gas and steam flow measurement accuracy by correcting for gas expansion
4.1.7 Activating Reynolds number correction
4.1.8 Activating mismatched pipe schedule (bore) correction
4.1.9 Setting up and resetting the internal totalizer
4.1.10 Scaling the pulse output
4.1.11 Setting up user defined flow units
4.1.12 Setting up the local LCD indicator display mode
4.1.13 Setting the low cut flowrate
4.1.14 Trimming the 4-20 mA analog output
4.1.15 Using the upload/download feature
For information on the following items, please refer to the noted reference points.
Adjusting trigger level adjustment (TLA) ................................................ see signal conditioning
Adjusting noise balance ........................................................................... see signal conditioning
Adjusting noise judge............................................................................... see signal conditioning
Connecting an oscilloscope to read the output from the YEWFLO ........... see troubleshooting
Minimizing the affects of noise ................................................................ see signal conditioning
Sizing a YEWFLO .................................................................................. refer to YEWFLO
sizing software
Calculating pressure drop through a flowmeter......................................... refer to YEWFLO
sizing software
Driving an output by inputting a frequency............................................... see amplifier calibration