Liquid Controls SP4000 - Manual (Page 83)

80
SP4000 Flow Computer
2
RATE 1
TOTAL
6.12
RELAYS
(Continued)
RELAYS
Enter a hysteresis value to ensure that the "ON" and "OFF"
switchpoints have different values and therefore prevent continual
and undesired switching near the limit value.
Input:
Number with floating decimal point:
0.000...999999
Display: 0.000 psia
HYSTERESIS
The alarm status for the particular relay can be cancelled here if (for
safety reasons) the setting "......, LATCH" has been selected in the
submenu "RELAY MODE". This ensures that the user is actively
aware of the alarm message.
Note:
• When in the HOME position, press the ENTER key to
acknowledge and clear alarms.
• The alarm status can only be permanently cancelled if the
cause of the alarm is removed.
Selection:
RESET ALARM? NO
RESET ALARM? YES
Display: RESET? NO
RESET ALARM
As an aid during start-up, the relay output may be manually
controlled independent of it's normal function.
Selection:
NORMAL, ON, OFF
Display: NORMAL
SIMULATE RELAY
HYSTERESIS
RESET ALARM
SIMULATE RELAY