Liquid Controls SP4000 - Manual (Page 81)

78
SP4000 Flow Computer
Set when and how the relays are switched "ON" and "OFF". This
defines both the alarm conditions and the time response of the alarm
status.
Selection:
HI ALARM, FOLLOW
LO ALARM, FOLLOW
HI ALARM LATCH
LO ALARM LATCH
RELAY PULSE OUTPUT
Note:
• For relay functions "MALFUNCTION" and "WET STEAM
ALARM". There is no difference between the modes
"HI......" and "LO......":
(i.e. HI ALARM FOLLOW = LO ALARM FOLLOW,
HI ALARM LATCH = LOW ALARM LATCH)
• Relay mode "RELAY PULSE OUTPUT" defines the relay
as an additional pulse output.
Display: HI ALARM, FOLLOW
RELAY MODE
After configuring a relay for "Alarm indication" (limit value), the
required setpoint can be set in this submenu. If the variable reaches
the set value, the relay switches and the corresponding message is
displayed.
Continuous switching near the setpoint can be prevented with the
"HYSTERESIS" setting.
Note:
• Be sure to select the units (SYSTEM UNITS) before
entering the setpoint in this submenu.
• Normally open or normally closed contacts are determined
when wiring.
Input:
Number with floating decimal point: -999999...+999999
Display: 99999.0 ft3/h
LIMIT SETPOINT 1
RELAY MODE
LIMIT SETPOINT
2
RATE 1
TOTAL
6.12
RELAYS
(Continued)
RELAYS