Valve Opening Time 1 T - Honeywell Krom Schroder BCU 580 Technical Information

Parameters

10 . 7 .4 Valve opening time 1 t

Parameter 59
This parameter is used to define the opening time for
the valves (2 to 25 s) which are opened to fill or dis-
charge the test volume between the gas valves. If the
preset opening time t
L
opening valves are used) to fill the test volume or re-
duce the pressure between the valves, bypass valves
can be used instead of the main valves.
The opening time may be longer than the 3 s permitted
by the standard (EN 1643:2000) if
– the gas volume which flows into the combustion
chamber is equal to, or less than, 0.083 % of the
maximum flow rate
and
– if bypass valves are used.
BCU 580 · Edition 11.15l
L1
= 2 s is inadequate (e.g. if slow
97