Yokogawa ADMAG AXF - Manual (Page 22)

IM 1E10C1-E 5-3
5. FUNCTION AND DATA SETTINGS
5.2 Setting Flow Span
(1) Determing the Flow Span
The flow rate span is the instantaneous flow rate value at which the output current is to
be 20mA.
Please determine the span under considering the followings.
• Please set the maximum flow rate at the most variable flow rate line.
If the flow rate of the fluid exceeds the flow rate span value, the flow rate that
exceeds this value (20mA or more) is not output and the flowmeter will not display
the correct flow rate. (108% or more can't be output)
• In a line where the flow rate is comparatively stable, set a value that is 1.5 to 2.0
times larger than the normal flow rate.
• Please set a value that will correspond to a flow velocity of 0.3 to 10m/s.
Please comfirm the flow velocity by sizing data or parameter No. “b13”.
(Parameter No. “b13” indicates corresponding flow velocity to set span)
• The basic input value for display is flow span value. It is recommended that the
accuracy of the first digit is in a 0.05 to 0.1% in case inputting the flow rate span
value.
For example, 30m
3 /h should be set as 30.00m 3 /h.
• In a span setting, the maximum value that can set is “30000” except any relation
with decimal position.