12.1 General Specifications
218
Alarm
External Sampling
Synchronized Sampling
Dual Sampling
Function
Alarm Output When the 8997 Alarm Unit is connected
(However, alarm output is not possible when only the 8997 Alarm Unit is connected to
the 8423 Memory HiLogger. It is only possible when the 8997 Alarm Unit is connected
in combination with the 8948 Voltage/Temp Unit, 8949 Universal Unit, or 8996 Digital/
Pulse Unit)
Number of Output Channels 15 channels per 8997 Alarm Unit
Alarm Types • Level
An alarm is output when the signal rises (falls) to the set level value
• Window trigger
Set the level upper limit value and lower limit value
An alarm is output when the signal exits or enters the area.
• Logic pattern
Hold Setting Hold or non-hold can be set
Sampling Point Sampling is performed on the rise or fall of an external input signal
(rise and fall are selectable)
•Rise
Sampling is performed when an input signal rises from a LOW of 0 to 1.0 V to a
HIGH of 2.5 to 5.0 V
•Fall
Sampling is performed when the external trigger terminal is shorted with the GND or
when an input signal falls from a HIGH of 2.5 to 5.0 V to a LOW of 0 to 1.0 V
Input Voltage Range -5 to 10 VDC
External Sampling Filter ON and OFF are selectable
Response Pulse Width
When the filter is OFF, the HIGH period is 1 ms or more and the LOW period is 2 μs or
more
When the filter is ON, the HIGH period is 2.5 ms or more and the LOW period is 4 ms
or more
Maximum External
Sampling Frequency
10 ms (when the digital filter is set to OFF)
20 ms (when the digital filter is set to OFF and performing synchronized measurement)
5 s (When the digital filter is set to 50 Hz/60 Hz and performing measurement in com-
bination with humidity measurement)
External Sampling Terminal Push-button type terminal block
Synchronization Method Synchronized sampling is made possible by connecting multiple loggers together with
9683 Connection Cables (for synchronization)
Loggers Capable of
Synchronization
8423 Memory HiLogger: Up to 5
Synchronization Cable
Connectors
IN side : 9-pin round connector
OUT side : 8-pin round connector
Recording Interval Types Two types of recording interval can be set: one for high speed and one for low speed
Possible Recording Interval
Settings
An interval can be set for high speed and for low speed from 10 ms, 20 ms, 50 ms, 100
ms, 200 ms, 500 ms, 1 s, 2 s, 5 s, 10 s, 20 s, 30 s, 1 min, 2 min, 5, min, 10 min, 20 min,
30 min, and 1 h
(However, these settings are only possible when the ratio of (low-speed recording
interval)/(high-speed recording interval) is an integer 1000 or less)
Real-time Saving The measurement data is saved in binary format to a compact flash card in real time
The data can be saved to another file each time
Full and Delete and Save are selectable
Marking Function
Each press of during measurement enables an event mark to be entered
Start Condition Hold
Function
Yes
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