240
Basic Specifications
7.
Alarms
Alarm conditions
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
Alarm sources
Analog, pulse, logic, waveform calculations
Low remaining
battery life
The system will output an alarm when the instrument’s remaining battery life declines.
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
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 leaves area
or when value enters area.
Slope
The system will output an alarm when the rate of change
exceeds the set value.
Logic
The system will output an alarm when patterns of 1/0/X match
(where “X” indicates either).
Alarm filter
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.
Alarm setting
resolution
Analog
0.1% f.s. (f.s. = 10 divisions)
Pulse
Integration 1
c
, rotational speed 1/
n
(where
n
= pulse count per
rotation setting)
Alarm retention
On/Off (user-selectable)
Clear alarms: When alarm retention is On, alarms will be cleared without stopping
recording.
Alarm tone
On/Off (user-selectable)
Alarm output
response time
With plug-in module(s) (Recording interval or data refresh interval, whichever is longer)
× 2 + 1 ms + (analog response time)*
*: Depending on filter settings (U8554 with a data refresh interval of 5 ms and low-pass
filter of 120 Hz).
8.
Other functionality
Even mark function
Even mark entry
method
Perform the following operation during recording:
(1) Pressing the
START
key
(2) With
[Mark]
chosen on the screen, pressing the
ENTER
key.
(3) Inputting a signal to an external input terminal
Alternatively, configuring the event mark setting so that an event
mark is entered responding to alarm (can be toggled on and
off).
Number of inputs
Up to 1000 inputs per measurement
Содержание LR8450
Страница 68: ...64 Observing Waveforms Alarm...
Страница 72: ...68 Observing Waveforms 3 Numerical calculation Numerical calculation results...
Страница 131: ...128 Acquiring Data with a Computer PC...
Страница 175: ...172 Controlling the System...
Страница 233: ...230 Controlling the Instrument with Communication Commands...
Страница 271: ...268 Plug in Module Specifications...