Hioki MEMORY HiLOGGER LR8450 Instruction Manual page 316

Input resistance
Allowable signal
source resistance
Reference junction
compensation
Thermocouple wire
break detection
Data refresh interval
Digital filters
Power
supply
frequency
filter setting
60 Hz
50 Hz
-2. Accuracy specifications
Accuracy guarantee
conditions
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Ω
10 M or greater (10 mV f.s. to 2 V f.s. voltage ranges, all thermocouple ranges)
Ω
1 M ±5% (10 V f.s. to 100 V f.s. voltage ranges, 1-5 V f.s. voltage range, humidity
range)
Ω
1 k or less
Internal/external (user-selectable) (during thermocouple measurement)
The system will check for wire breaks at the date refresh intervals 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.)
10 ms*, 20 ms, 50 ms, 100 ms, 200 ms, 500 ms, 1 s, 2 s, 5 s, 10 s
*: Setting available when thermocouple wire break detection is disabled.
The digital filter cutoff frequency is automatically set as described in the following table
according to the data refresh interval, Wire break detection setting, and power supply
frequency filter setting:
Wire break
detection
10 ms 20 ms
setting
Off 20.8 k 6.94 k
On – 20.8 k
Off 20.8 k 6.94 k
On – 20.8 k
Accuracy guarantee
duration
Accuracy guarantee
duration after
adjustment made by
Hioki
Accuracy guarantee
temperature and
humidity range
Warm-up time
The conditions have been specified with after zero-adjustment finished and the cutoff
frequency set to 50 Hz/60 Hz (see cutoff frequency table in "Digital filters" [p. 3 11]).
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Data refresh interval
50 ms 100 ms 200 ms 500 ms
2.98 k 2.37 k 739
6.94 k 2.98 k 2.37 k
2.98 k 2.37 k 739
6.94 k 2.98 k 2.37 k
1 year
1 year
23°C ±5°C (73°F ±9°F), 80% RH or less
At least 30 min. after connecting to the LR8450/LR8450-01
Memory HiLogger and turning on the instrument
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Plug-in Module Specifications
–: Setting not available
1 s 2 s 5 s
60 60 60 60
739 60 60 60
50 50 50 50
739 50 50 50
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10 s
60
60
50
50
Unit: Hz