1 Under [Alarm], set the alarm function to [ON].

2 Under [Alarm hold], select whether to maintain alarm output.

OFF ☑

Stops alarm output once the alarm condition is no longer satisfied. Use this setting when you wish to output an alarm only while the alarm condition is satisfied.

ON

Once an alarm is outputted, maintains (continue) the alarm output until you release the alarm manually or stop measurement. Use this setting when you wish to maintain (continue) alarm output even if the alarm condition is no longer satisfied (i.e., even if conditions have returned to normal).   If the alarm filter ([Filter]) is set to [OFF] Alarm retention will be applied to judgment results for the alarm sources you wish to monitor. Example: AND logic applied to U1-1 and U1-2 The satisfaction state for alarm conditions will be retained once the U1-1 alarm condition is satisfied. Since the state will continue to be retained even if the U1-1 alarm condition is no longer satisfied, an alarm will be output once the U1-2 alarm condition is satisfied. If the alarm filter ([Filter]) is set to a value other than [OFF] Alarm retention will be applied to [ALM1] to [ALM8]. Example: AND logic applied to U1-1 and U1-2 Alarm output will be retained only when both the U1-1 and U1-2 conditions are satisfied at the same time.

3 Under [Alarm buzzer], select whether to sound an alarm tone when alarm output occurs.

4 Under [Event mark], select whether to assign an event mark when an alarm occurs.

“5.3 Assigning Event Marks When Alarms Occur” in the Instruction Manual.

5 Under [Alarm history], select an alarm group you wish to keep.

[Start 100] ☑	Keep Alarms 1 through 100 in the history information. (Alarm 101 and later will be discarded.)
[Latest 100]	Keeps the latest 100 alarms in the history information. (Alarms older than the 100th older one will be discarded.) Alarm 999,999 and older can be kept in the history information.

Alarms issued during measurement, which started by pressing the START key, will be saved in the history.

When the trigger setting is used, alarms issued in the trigger standby state will be saved in the history. (Those issued before the instrument started to record waveforms may be included.)

6 Under [Condition] for each alarm output ([ALM1] to [ALM8]), select the alarm condition.

OR ☑	Outputs an alarm when any of the alarm conditions that have been set for the channels is satisfied.
AND	Outputs an alarm when all of the alarm conditions that have been set for the channels are satisfied.

7 Under [Tc Burn out] for each alarm output ([ALM1] to [ALM8]), select whether to output an alarm when a thermocouple wire break is detected.

You can use the wire break detection when [Burn out] is set to [ON].

“Measuring temperature (with thermocouples)” in “1.4 Configuring Input Channels” in the Instruction Manual.

This type of alarm is output without regard to other alarm conditions (AND/OR logic).

8 Under [Disconnect] for each alarm output ([ALM1] to [ALM8]), select whether to output an alarm when communication with the wireless module is interrupted. (LR8450-01 only)

This type of alarm is output without regard to other alarm conditions (AND/OR logic).

If communications with a wireless module are disrupted, the disruption event will be kept in the history information regardless of the alarm output setting.

OFF ☑	Does not output an alarm, even if communication is interrupted.
Now	Outputs an alarm immediately if communication is interrupted.
3min	Outputs an alarm once communication has been interrupted for 3 min.

9 Under [Low Battery] for each alarm output ([ALM1] to [ALM8]), select whether to output an alarm when the instrument battery or a wireless module battery has low remaining charge.

This type of alarm is output without regard to other alarm conditions (AND/OR logic).

1 Select the waveform display color.

2 Under [Filter], select the number of data points.

The system will output an alarm if the alarm state continues for the set number of data points.

If alarm sources include a wireless module’s channel, no filter may be applied during data recovering processes.

 

(When [Filter] is set to [User])

Set the number of data points.

3 Under [Comment], enter a comment (as necessary).

“Text entry method” in “1.1 Performing Basic Operations” in the Instruction Manual.

1 Press the ENTER key while [Un-m], [Rn-m], [Pm], or [Wm]in the channel you wish to observe is selected (m = 1, 2, . . .).
A window with channel-specific alarm settings will open.

Individual settings window

2 Configure alarm settings for each channel you wish to monitor ([ALM1] to [ALM8]).

Alarm type	Setting description		Operation	Description
OFF ☑	－		－	Disables the alarm function.
Level	Slope	↑☑, ↓		Outputs an alarm when the measurement data is greater than or equal to the specified level.
	Level	Enter a value.		Outputs an alarm when the measurement data is less than the specified level. However, only if the pulse-channel level is specified at zero, an alarm is output when the pulse-channel measurement data is also equal to zero.
Window	Direction	IN ☑, OUT		Outputs when the measurement data remain between the lower and upper limits.
	Upper and lower limit values	Enter values.		Outputs when the measurement data is less than the lower or more than the upper limit. However, only if the pulse-channel upper or lower limit value is specified at zero, an alarm is output when the pulse-channel measurement data is also equal to zero.
Slope	Level	Enter a value.		Outputs an alarm when a change rate of measured data acquired within the set period exceeds that calculated from the settings (level/time). *2
	Time	Set a time.*1
Slope 2p	Slope	↑☑, ↓		Outputs an alarm when the amount of change in the set period is greater than or less than the set level value.
	Level	Enter a value.
	Width	Set a width with time.
Pattern	Level	1, 0, X ☑		Outputs an alarm when the logic signal is 1 (high).
				Outputs an alarm when the logic signal is 0 (low).
				Not used in alarm judgments. Ignores the signal.

1. *1

   Integral multiples of the data refresh interval of the module can be set for the time figure.

2. *2

   Slope example

   With a level of 5°C and a time of 5 s

   1. With a recording interval of 5 s

   An alarm will be output if the current measured value differs from the previous measured value by more than 5°C.

   Example data: 20°C, 25.1°C

   2. With a recording interval of 1 s

   An alarm will be output if each current measured value differs from its previous measured value by more than 1°C for five data points in a row.

   Example data: 20°C, 21.1°C, 22.2°C, 23.3°C, 24.4°C, 25.5°C

 

1	Alarm type
2	Slope for Alarm [Level]
3	Level for Alarm [Level]*1
4	Direction for Alarm [Window]
5	Upper limit value for Alarm [Window]*1
6	Lower limit value for Alarm [Window]*1
7	Level for Alarm [Slope]*1
8	Time for Alarm [Slope] The alarm slope time cannot be set to a value that is less than 1 sec.
9	Level and time used to judge whether alarm conditions are met (level/time) For the module When the data refresh interval or recording interval is longer than the value set in Box 8, the data refresh interval or recording interval, whichever is longer, will be set. For the pulse or waveform calculation When the recording interval is longer than the value set in Box 8, the time is set to the recording interval. In both cases, the level is calculated as follows: (Level) = (Value set in Box 7) × {(Time) / (Value set in Box 8)}.
10	Slope for Alarm [Slope 2p]
11	Level for Alarm [Slope 2p]*1
12	Period for Alarm [Slope 2p] A period of up to less than 24 hours and equivalent of 1000 samples can be set.

1. *1

   The instrument expresses strain in terms of micro epsilon (με). You do not need to enter the SI prefix micro (μ).

3 When the input type of the logic channel (P1 to P8) is set to [Logic]

Press the ENTER key while [Logic] is selected.

Under [Conditions], select the condition for activating the alarm.

“Measuring logic signals” in “1.4 Configuring Input Channels” in the Instruction Manual.

OFF	Does not use alarms based on logic signals.
OR	Outputs an alarm when any of the patterns is satisfied.
AND	Outputs an alarm when all of the patterns are satisfied.

1	Alarm activation conditions
2	Level for Alarm [Pattern]