Hioki MEMORY HiLOGGER LR8450 Instruction Manual page 311

Basic Specifications
7. Alarms
Alarm conditions
Alarm sources
Disruption of
communications with
wireless modules
(LR8450-01 only)
Low remaining
battery life
Thermocouple wire
break
Types of alarms
Alarm filter
Alarm setting
resolution
Alarm retention
Alarm tone
Alarm output
response time
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Set separately for ALM1 to ALM8
The system will output an alarm when any of the following conditions are satisfied:
• AND/OR operation performed on alarm sources
• Low battery
• Thermocouple wire break
• Disruption of communications with wireless modules (LR8450-01 only)
Analog, pulse, logic, waveform calculations, CAN (up to 100)
If communicates with a wireless module are disrupted
Off/Now/3 min. (user-selectable)
Now: Outputs an alarm upon a communications disruption
3 min.: Outputs an alarm if a communication disruption continues for 3 minutes.
The system will output an alarm when the remaining battery life of the instruments or a
wireless module decline.
The system will output an alarm when a thermocouple wire break occurs (when the
thermocouple wire break detection setting is enabled).
Analog, pulse, Level
waveform calculations,
CAN
Window
Slope
Logic The system will output an alarm when patterns of 1/0/X match
(where "X" indicates either).
Apply a filter to the results of AND/OR operations performed on alarm sources.
Set based on sample count (Off, 2 to 1000).
The system will output an alarm if the alarm state continues for the set number of samples.
Analog 0.1% f.s. (f.s. = 10 divisions)
Pulse Integration 1c, rotational speed 1/n (where n = pulse count per
rotation setting)
On/Off (user-selectable)
Clear alarms: When alarm retention is On, alarms will be cleared without stopping
recording.
On/Off (user-selectable)
When using the plug-in modules
(Recording interval or data refresh interval, whichever is longer) × 2 + 1 ms
1
+ (analog response time)*
When using the wireless modules (LR8450-01 only)
(Recording interval or data refresh interval, whichever is longer) × 2
2
+ (wireless response time)* + (analog response time)*
*1: Depending on filter settings (U8554 with a data refresh interval of 5 ms and low-pass
filter of 120 Hz).
*2: When the radio-wave state is in good condition, 1s.
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The system will output an alarm following a rising or
falling edge at set level.
Set upper limit and lower limit.
The system will output an alarm when value exits area or
when value enters area.
Set a level and a time interval
The system will output an alarm when the rate of change
(level per unit time) continues to exceed the specified
change rate during the set time interval.
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