Hioki MEMORY HiLOGGER LR8450 Instruction Manual page 37

Configuring Input Channels
Thermocouple wire break detection
• The system checks for wire breaks by applying a minuscule current at the date refresh intervals
when measuring temperature using thermocouples.
• Measured values are not affected since wire breaks are detected when measurement is not being
performed.
• If the data refresh intervals are the same, setting
noise rejection since it results in a cutoff frequency that is higher than the
Check "Digital filter" of each module in "10.2 Plug-in Module Specifications" (p. 3 10) for the cutoff
frequency.
• If the thermocouple resistance exceeds roughly the next value, the system will determine that a
wire break has occurred.
Thermocouple
When using a long thermocouple with
break detection.
Find Quality Products Online at:
100°C f.s.
K 260
J 470
E 1530
T 220
N 520
R 50
S 50
B
C 220
[Burn out]
GlobalTestSupply
www.
[Burn out] to [ON]
Range
500°C f.s.
Ω Ω
5400
Ω Ω
4150
Ω Ω
5970
Ω Ω
5440
Ω Ω
1470
Ω Ω
40
Ω Ω
80
– –
Ω Ω
910
set to [ON], use a thick-diameter wire to avoid false wire
will result in less effective
[OFF] setting.
2000°C f.s.
Ω
2940
Ω
200
Ω
9290
Ω
5440
Ω
590
Ω
890
Ω
1300
Ω
2090
Ω
3090
.com
sales@GlobalTestSupply.com