Hioki MEMORY HiLOGGER LR8450 Instruction Manual page 247

Plug-in Module Specifications
Input resistance
Allowable signal
source resistance
Reference junction
compensation
Thermocouple wire
break detection
Data refresh interval
Digital filters
Power supply Wire
frequency break
filter setting detection
setting
60 Hz Off
On
50 Hz Off
On
-2. Accuracy specifications
Accuracy guarantee
conditions
244
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 range, 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 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.)
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:
10 ms 20 ms 50 ms
20.8 k 6.94 k 2.98 k
– 20.8 k 6.94 k
20.8 k 6.94 k 2.98 k
– 20.8 k 6.94 k
Accuracy guarantee 1 year
period
Accuracy guarantee 1 year
period after adjustment
made by Hioki
Accuracy guarantee 23°C ±5°C (73°F±9°F), 80% RH or less
temperature and
humidity range
Warm-up time At least 30 min. after connecting to the LR8450/LR8450-01
Memory HiLogger and turning on the instrument
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. 2 44]).
Data refresh interval
100 ms 200 ms 500 ms
2.37 k 739 60
2.98 k 2.37 k 739
2.37 k 739 50
2.98 k 2.37 k 739
–: Setting not available
1 s 2 s 5 s 10 s
60 60 60 60
60 60 60 60
50 50 50 50
50 50 50 50
Unit: Hz