Hioki LR8431-20 - Page 149

Chapter 10 Specifications
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10
Chapter 10 Specifications
Measurement
accuracy
• Voltage: ±0.1% f.s. (For the 1-5V range, f.s = 10 V)
• Thermocouple: 
K, J, E, T: (-200C to less than -100C)
±1.5C
(-100C or more) ±1.0C
N: (-200C to less than -100C) ±2.2C
(-100C or more) ±1.2C
R, S: (0C to less than 300C) ±4.5C
(300C or more) ±2.2C
B: (400C to less than 1,000C) ±5.5C
(1000C or more) ±2.5C
• Reference junction compensation accuracy:
±0.5C (Horizontal placement)
±1C (Upright placement)
(Add to thermocouple measurement accuracy when internal RJC
is enabled.)
Temperature 
characteristic
Add (Measurement accuracy × 0.1) /°C to measurement accuracy
Reference junction
compensation
Internal/External selectable (for thermocouple measurements)
Digital filter Off, 50 Hz, 60 Hz (cut-off frequency set automatically according to
recording interval)
Cut-off frequency
Input resistance 1 M±5% (broken wire detection disabled, for voltage and thermo-
couple measurements)
At least 800 k (with broken wire detection enabled for thermocou-
ple measurements)
Normal mode 
rejection ratio
50dB minimum
(with 50 Hz input with 5 s recording interval, and 50 Hz digital filter
enabled)
(with 60
Hz input with 2 s recording interval, and 60 Hz digital filter
enab
led)
Measurement Input Section
[Hz]
Recording
interval
Digital filter
Recording
interval
Digital filter
60Hz 50Hz Off 60Hz 50Hz Off
10ms 11.56k 11.56k
11.56k
1s 108.2 108.2
11.56k
20ms 5.78k 5.78k 2s 60 54.03
50ms 2.216k 2.216k 5s 60 50
100ms 1.096k 1.096k 10s 60 50
200ms 542.5 542.5 20s or more 10 10
500ms 216.6 216.6