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8.5 Alarm Features
In this monitor, settings of alarms and are adjustable to any levels to help you keep on monitoring the
process flow. And by setting up two parameters - "lower limit in alarm immunity range" and "alarm immunity
time," precise alarm settings can be established against leaks. Follow the instructions given in this manual
when you set up alarm set points. Examples of alarm setup are also given in this section.
CAUTION:
If alarm features are not desired, set the alarm set points to "0" (alarm status
either at high alarm or lower alarm).
(1) Setting up the high alarm
Parameters related to the high alarm come in the following five, () through (). Set each of them by
referring to the description given for individual parameters.
①
Alarm setpoint
Set the flowrate [(L/min (normal)) to be at the upper alarm.
②
Alarm hysteresis
Alarm is cancelled when the following conditions are met. Select the appropriate alarm hysteresis [L/
min (normal)].
Flowrate < Alarm setpoint - Alarm hysteresis
If variation in flowrate is excessive, resulting in frequent alarm ON-OFF cycling, set a little larger value.
③
Alarm status (higher digit)
Setting is to be made on the high alarm: set "H" to the higher digit.
④
Alarm status (lower digit)
Set up the output status to the lower digit in an alarmed condition.
Selecting "S" results in an "ON" output (Lo impedance) in an alarmed condition.
Setting "o" results in an "OFF" (Hi impedance) in an alarmed condition.
⑤
Alarm immunity time
Set the delay time [in sec] from the moment the flowrate exceeds the alarm set value to the moment
an alarm is activated. Remember that setting of this parameter is common to both alarms and .
Summary of Contents for TF1015-P11G-11 A Series
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