317
Maximum rated
terminal-to-ground
voltage
300 V AC, DC (Measurement Category II)
between any two modules
Anticipated transient overvoltage: 2500 V
Input resistance 10 M
or greater (10 mV f.s. to 2 V f.s. voltage ranges, all thermocouple ranges, all
resistance temperature detector and resistor ranges)
1 M
range)
Allowable signal
source resistance
1 k
or less
Reference junction
compensation
Internal/external (user-selectable) (during thermocouple measurement)
Thermocouple wire
break detection
The system will check for wire breaks at the date refresh intervals during thermocouple
measurement.
(Setting not available when the data refresh interval is set to 10 ms.)
Data refresh interval 10 ms*
1
, 20 ms*
2
, 50 ms*
2
, 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 not set for
Pt1000 measurement.
*2: Setting available when not set for Pt1000 measurement.
Digital lters
according to the data refresh interval, Wire break detection setting, and power supply
–: Setting not available
Power
supply
frequency
lter setting
Wire
break
detection
setting
Data refresh interval
10 ms*
3
20 ms*
3
50 ms*
3
100 ms 200 ms 500 ms 1 s 2 s 5 s 10 s
60 Hz 20.8 k 2.37 k 60 60 60 60 60
On – 20.8 k 2.37 k 60 60 60 60
50 Hz 20.8 k 2.37 k 50 50 50 50 50
On – 20.8 k 2.37 k 50 50 50 50
Unit: Hz
*3: Setting not available when mixed with Pt1000 measurement.
-2. Accuracy specications
Accuracy guarantee
conditions
Accuracy guarantee
duration
1 year
Accuracy guarantee
duration after
adjustment made by
Hioki
1 year
Accuracy guarantee
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
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