IM-P343-35 CTLS Issue 5
55
SP500 Electropneumatic Smart Positioner
9.6.5 T-UP - valve slow opening action
•
Programming notes
This function slows down the time taken for the valve to travel from 0 to 100% lift. The time displayed
is the fastest travel time measured during autostroke (AUTOS). 4 seconds may be displayed if ACT is
set to 'ON' (refer to Section 9.5.2, page 45).
Default value is the fastest time measured during autostroke.
Press and keys to alter the displayed value. Press key to accept the displayed value and advance
to time down (T- dWN).
Commissioning notes
The time displayed on start-up is the fastest time measured during autostroke commissioning
(AUTOS). A time cannot be set less than the minimum recorded during autostroke. The value set
will be the time taken for the valve to travel from 0 to 100% lift. The time set will apply at all times
and not just at start-up. This function is useful to prevent the effects of system waterhammer,
thermal shocks or slow down over-reactive systems or the effects of oversized valves. Default is
the fastest time measured during autostroke. Maximum setting is 180 seconds.
9.6.6 T-dWN - valve slow closing action
•
Programming notes
This function slows down the time taken for the valve to travel from 100 to 0% lift. The time displayed on
start-up is the fastest travel time measured during autostroke (AUTOS). 4 seconds may be displayed if
ACT is set to 'ON' (refer to Section 9.5.2, page 45). Default value is the fastest time measured during
autostroke.
Press and keys to alter the displayed value. Press key to accept the displayed value and advance
to travel switch 1 (TS1).
Commissioning notes
During autostroke routine the quickest time taken for the valve to fully close will be measured and
displayed. A time cannot be set less than the minimum recorded during autostroke. The value set
will be the time taken for the valve to travel from 100 to 0% lift. This action will apply at all times
and not just at start-up. This function is useful to prevent the effects of system waterhammer, or to
slow down over-reactive systems or the effects of oversized valves. Default is the minimum time
measured during autostroke. Maximum setting is 180 seconds.
To Next Page
Loading...
