Hioki LR8450, Instruction Manual

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Plug-in Module Specifications
Reference junction
compensation
Internal/external (user-selectable) (during thermocouple measurement)
Thermocouple wire
break detection
The system will check for wire breaks each date refresh interval during thermocouple
measurement.
On/Off (user-selectable) (set for entire module)
Detection current: 5 μA ±20% (No current flows while acquiring measurement data.)
Setting not available when the data refresh interval is set to 10 ms.
Setting not available when the data refresh interval is set to 20 ms and 16 or more
channels are being used.
Data refresh interval 10 ms*
1
, 20 ms*
2
, 50 ms, 100 ms, 200 ms, 500 ms, 1 s, 2 s, 5 s, 10 s
*1: Setting available when thermocouple wire break detection is disabled and the number
of channels in use ranges from 1 to 15.
*2: Setting available when thermocouple wire break detection is disabled and the
number of channels in use ranges from 16 to 30. Alternatively, setting available when
thermocouple wire break detection is enabled and the number of channels in use
ranges from 1 to 15.
Digital filters The digital filter cutoff frequency is automatically set as described in the following table
according to the number of channels in use, data refresh interval, Wire break detection
setting, and power supply frequency filter setting:
(1) When the number of channels in use is 15 or less
–: Setting not available
Power
supply
frequency
filter setting
Wire
break
detection
setting
Data refresh interval
10 ms 20 ms 50 ms 100 ms 200 ms 500 ms 1 s 2 s 5 s 10 s
60 Hz Off 20.8 k 6.94 k 2.98 k 2.37 k 739 60 60 60 60 60
On – 20.8 k 6.94 k 2.98 k 2.37 k 739 60 60 60 60
50 Hz Off 20.8 k 6.94 k 2.98 k 2.37 k 739 50 50 50 50 50
On – 20.8 k 6.94 k 2.98 k 2.37 k 739 50 50 50 50
Unit: Hz
(2) When the number of channels in use is 16 to 30
–: Setting not available
Power
supply
frequency
filter setting
Wire
break
detection
setting
Data refresh interval
10 ms 20 ms 50 ms 100 ms 200 ms 500 ms 1 s 2 s 5 s 10 s
60 Hz Off – 20.8 k 6.94 k 2.98 k 2.37 k 739 60 60 60 60
On – – 20.8 k 6.94 k 2.98 k 2.37 k 739 60 60 60
50 Hz Off – 20.8 k 6.94 k 2.98 k 2.37 k 739 50 50 50 50
On – – 20.8 k 6.94 k 2.98 k 2.37 k 739 50 50 50
Unit: Hz