Yokogawa ADMAG AXF - Manual (Page 32)

IM 1E10C1-E 5-13
5. FUNCTION AND DATA SETTINGS
5.5.8 Forward and Reverse Flow Measurement
• This function enables to measure forward and reverse flow rate without change the
detector direction.
• By setting reverse range, in case fluids flow to reverse direction the flowmeter
measures it as reverse direction range automatically. In this time, a status signal that
shows changing into the reverse direction is output.
• To set the internal totalizing function for forward direction can also show it for
reverse direction by parameter settings.
• PLS/ALM+, PLS/ALM– are used for output connection.
PLS/ALM+, PLS/ALM– terminals are for common use with pulse, alarm and other
status output functions. Therefore, in case this function is used, other functions are not
available to use.
F and R flow rate measurement can be selected as “02” in
parameter No. “b10”.
Reverse direction span can be set in parameter No.
“b30”.
Flow rate unit is the same as forward direction span.
Futher reverse range span should be set in the same
number of places of decimals as forward range span.
Example: forward flow rate : 1.000 then reverce flow rate
should be 4.000.
Hysteresis width at switching direction can be set in
parameter No. “b31”.
It is the rate (%) of the smaller span, either forward or
reverse span. “b31”.
When using reversed status (ON/OFF) is required,
it can be set in
“N02 Output Mode”
Display Description
Code
00
01
02
03
04
05 Pulse output
Alarm output
Forward / reverse flow measurement
Automatic two range switching
Alarm output at low flow limit
Totalization switch
Default: 00
Content
Hysteresis
Default: 2%
0%
Flow Rate
Status output
Forward flow measurement: OFF
Reverse flow measurement: ON
NOTE