33
Notes:
• If no second sensor is installed, disable this alarm. This failure alarm should be enabled if a
second temperature sensor is connected to the
TS 2 input.
• This alarm is always latched and must be reset by the user.
3.7.5 LOW TEMPERATURE SENSOR 2 ALARM
Purpose: If enabled, the
LOW TS 2 ALARM allows for alarming of low temperature conditions as
sensed by the second temperature sensor (
TS 2).
Alarm Mask: ENABLE or DISABLE
Range: –76°F to 1058°F (–60°C to 570°C)
Procedure: Adjust LOW TS 2 ALARM temperature setpoint to the desired value. Note that the LOW
TS 2 ALARM
must be enabled in order to adjust the LOW TS 2 ALARM temperature setpoint.
Notes:
• If no second sensor is installed, this alarm should be disabled. This alarm should be enabled
and the setpoint should be appropriate for the heating application. Maintaining a minimum
5°C differential between low temperature alarming and the
CONTROL SETPOINT temperature
minimizes nuisance alarming due to momentary dips in temperature. Another alternative to
this is to configure the controller for non-latching temperature alarms.
• This alarm must be enabled and its setpoint must be below the
CONTROL SETPOINT tempera-
ture if fail-safe mode uses the temperature from
TS 2.
3.7.6 HIGH TEMPERATURE SENSOR 2 ALARM
Purpose: If enabled, the
HIGH TS 2 ALARM allows for alarming of high temperature conditions as
sensed by the second temperature sensor (
TS 2).
Alarm Mask: ENABLE or DISABLE
Range: –76°F to 1058°F (–60°C to 570°C)
Procedure: Adjust the HIGH TS 2 ALARM temperature setpoint to the desired value. Note that the
HIGH TS 2 ALARM must be enabled in order to adjust the HIGH TS 2 ALARM temperature setpoint
unless the TS 2 HIGH LIMIT CUTOUT feature is enabled.
Note: If no second sensor is installed, disable this alarm. This alarm may be used for applica-
tions where a product that is sensitive to over temperature is involved. General usage could
result in nuisance alarms due to the flow of hot product or steam out. This may be a case where
the alarm could be enabled and non-latching temperature alarming used. A high temperature
condition resulting from a forced on failure of the heating circuit should first be alarmed by the
SWITCH FAILURE ALARM. See section 3.8.18 on page 40 for more information.
3.7.7 LOW TEMPERATURE SENSOR ALARM FILTER TIME SETTING (V3.11 AND UP)
Purpose: The
LOW TS ALARM FILTER will prevent LOW TS 1 and/or LOW TS 2 ALARMS from being
indicated until their corresponding alarm condition has existed for the duration of the
LOW TS
ALARM FILTER
time.
Range: 0 to 999 Minutes
Procedure: Adjust the LOW TS ALARM FILTER time to the desired value. Note that either the LOW
TS 1 ALARM
and/or the LOW TS 2 ALARM must be enabled in order to adjust the LOW TS ALARM
FILTER
time.
Notes:
• If an alarm condition appears and then disappears before the alarm filter time has expired,
the filter timer is reset and the alarm condition must exist again for the entire alarm filter time
before the corresponding alarm will be indicated.
• If the user resets an alarm while the alarm condition is still exists, then the alarm will not be
indicated again until the entire alarm filter time has expired.
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