11.1 LR8400-20, LR8401-20, LR8402-20 Memory HiLogger Specifications
236
Thermocouple burn-
out detection
Enable/disable thermocouple burn-out detection at each recording interval.
5 A
±20% detection current. No current flow when acquiring measure-
ment data.
Burn-out detection is effective for recording intervals longer than 20 ms
(for
up to 15 channels: U1-1 to U1-15).
Digital filter Off, 50 Hz, 60 Hz
(automatically sets the cut-off frequency according to the recording inter-
val)
Cut-off frequency See the Cut-Off Frequency Table (p. 237).
Input resistance 1 M±5% (voltage and thermocouple measurement)
2 M
±5% (RTD and resistance measurement)
Normal mode rejec-
tion ratio
50dB minimum (with 50 Hz input with 5 s recording interval, and 50 Hz
digital filter enabled)
(with 60 Hz input with 5 s recording interval, and 60 Hz digital filter enabled)
(Using up to 15 channels (U1-1 to -15) with thermocouple burn-out disabled.)
Common mode re-
jection ratio
with 100 maximum signal source impedance
100dB minimum (with 50 or 60 Hz input and digital filter disabled)
140dB minimum
(for 50-Hz input with 5 s recording interval
, 50-Hz digital filter enabled, 10
mV f.s. range setting)
(for 60-Hz input with 5 s recording interval
, 60-Hz digital filter enabled, 10
mV f.s. range setting)
(Using up to 15 channels (U1-1 to -15) with thermocouple burn-out disabled.)
Conditions of guar-
anteed accuracy
After 30 minutes warm-up
Temperature and hu-
midity range for
guara
nteed accuracy
Temperature 23±5°C (73±9°F),
Humidity 30 to 80% RH (non-condensating)
Effect of radiated ra-
dio- frequency elec-
tromagnetic field
±5%f.s. at 3 V
Effect of conducted
ra
dio-frequency
electromagnetic field
±5%f.s. at 3 V/m
Pulse/Digital input
Terminal block M3 screw type terminal block
Input signal compati-
bility
Non-voltage ”a” contact (normally open) open collector or voltage input
Maximum input volt-
age
0 to 50 VDC
Input resistance 1.1 M±5%
Max. inter-channel
voltage
Non-isolated (HiLogger/GND Common)
Maximum rated volt-
age to earth
Non-isolated (HiLogger/GND Common)
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