Open Rtd Sensor; Rtd Short/Low Temperature - GE 489 Instruction Manual

4.9 S8 RTD TEMPERATURE
SETPOINTS S8 RTD TEMPERATURE

OPEN RTD SENSOR

[ENTER] for more
The 489 has an Open RTD Sensor Alarm. This alarm will look at all RTDs that have either an alarm or trip programmed and
determine if an RTD connection has been broken. Any RTDs that do not have a trip or alarm associated with them will be
ignored for this feature. When a broken sensor is detected, the assigned output relay will operate and a message will
appear on the display identifying the RTD that is broken. It is recommended that if this feature is used, the alarm be pro-
grammed as latched so that intermittent RTDs are detected and corrective action may be taken.
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PATH: SETPOINTS S8 RTD TEMPERATURE
RTD SHORT/LOW TEMP
[ENTER] for more
The 489 has an RTD Short/Low Temperature alarm. This alarm will look at all RTDs that have either an alarm or trip pro-
grammed and determine if an RTD has either a short or a very low temperature (less than –50°C). Any RTDs that do not
have a trip or alarm associated with them will be ignored for this feature. When a short/low temperature is detected, the
assigned output relay will operate and a message will appear on the display identifying the RTD that caused the alarm. It is
recommended that if this feature is used, the alarm be programmed as latched so that intermittent RTDs are detected and
corrective action may be taken.
4-54
OPEN RTD SENSOR
ð
OPEN RTD SENSOR:
ENTER
ð
ESCAPE Off
ASSIGN ALARM
ESCAPE
RELAYS (2-5): ---5
MESSAGE
OPEN RTD SENSOR
ESCAPE
ALARM EVENTS: Off
MESSAGE
RTD SHORT/LOW TEMP
ð
RTD SHORT/LOW TEMP
ENTER
ð
ALARM: Off
ESCAPE
ASSIGN ALARM
ESCAPE
RELAYS (2-5): ---5
MESSAGE
RTD SHORT/LOW TEMP
ESCAPE
ALARM EVENTS: Off
MESSAGE
489 Generator Management Relay
4.9.6 OPEN RTD SENSOR
Range: Off, Latched, Unlatched
Range: Any combination of Relays 2 to 5
Range: On, Off

4.9.7 RTD SHORT/LOW TEMPERATURE

Range: Off, Latched, Unlatched
Range: Any combination of Relays 2 to 5
Range: On, Off
4 SETPOINTS
GE Multilin