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7. Alarms
Alarm conditions Set separately for ALM1 to ALM8
• AND/OR operation performed on alarm sources
• Low battery
• Thermocouple wire break
• Disruption of communications with wireless modules (LR8450-01 only)
Alarm sources Analog, pulse, logic, waveform calculations, CAN (up to 100)
Disruption of
communications with
wireless modules
(LR8450-01 only)
If communicates with a wireless module are disrupted
Now: Outputs an alarm upon a communications disruption
3 min.: Outputs an alarm if a communication disruption continues for 3 minutes.
Low remaining
battery life
The system will output an alarm when the remaining battery life of the instruments or a
wireless module decline.
Thermocouple wire
break
The system will output an alarm when a thermocouple wire break occurs (when the
thermocouple wire break detection setting is enabled).
Types of alarms Analog, pulse,
waveform calculations,
CAN
Level
The system will output an alarm following a rising or
falling edge at set level.
Window
Set upper limit and lower limit.
The system will output an alarm when value exits area or
when value enters area.
Slope
Set a level and a time interval
The system will output an alarm when the rate of change
change rate during the set time interval.
Logic The system will output an alarm when patterns of 1/0/X match
(where “X” indicates either).
Alarm lter
The system will output an alarm if the alarm state continues for the set number of samples.
Alarm setting
resolution
Analog
Pulse Integration 1c, rotational speed 1/n (where n = pulse count per
rotation setting)
Alarm retention
Clear alarms: When alarm retention is On, alarms will be cleared without stopping
recording.
Alarm tone
Alarm output
response time
When using the plug-in modules
(Recording interval or data refresh interval, whichever is longer) × 2 + 1 ms
+ (analog response time)*
1
When using the wireless modules (LR8450-01 only)
(Recording interval or data refresh interval, whichever is longer) × 2
+ (wireless response time)*
+ (analog response time)*
1
*2: When the radio-wave state is in good condition, 1s.
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