Instruction Manual
7-83
IM 01R04B04-00E-E 8th edition March 01, 2011 -00
All Rights Reserved. Copyright © 2003, Rota Yokogawa
To set the functions of mass ow measurement.
Select:
Select:
(low range value)
Set a mass ow value to the 4 mA or 0 Hz. LRV can also be negative to
measure reverse ow.
(upper range value)
Set a mass ow value to the 20 mA or xxxxxHz.
Abs(URV-LRV) ≥ 5% of Qnom for liquids (1% for gases)
Set the damping time in s. Damping time affects outputs and display.
After 5 times damping time the given value is displayed (t=63%).
Set the low cut. Low cut affects outputs and display and applies to
negative and positive ow. A hysteresis of 0.05% of Qnom is given by
the system.
Select:
Select a mass ow alarm level. What happens in case of an alarm has
to be dened in Status out (7.12, 7.13).
Select:
Restrictions:
All alarms have to be in 0-110%
of URV-LRV.
Alarm criteria 2 must always be
larger than alarm criteria 1.
Select a mass ow alarm level. What happens in case of an alarm has
to be dened in Status out (7.12, 7.13).
Select:
Select a x Mass ow value (only for test purpose or in case of
maintenance).
The set value is added to the actual value. In case of no ow it will vary
with the zero uctuation.