11.1 LR8400-20, LR8401-20, LR8402-20 Memory HiLogger Specifications
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Chapter 11 Specifications
11
Models LR8400-20, LR8401-20, and LR8402-20 are distinguished by the input units
installed at the factory.
(1) General Specifications
Specifications Chapter 11
Model UNIT1 UNIT2
LR8400-20 Voltage/Temp Unit Voltage/Temp Unit
LR8401-20 Universal Unit Universal Unit
LR8402-20 Universal Unit
Voltage/Temp Unit
11.1 LR8400-20, LR8401-20, LR8402-20 Memory
HiLogger Specifications
Basic Specifications
Period of guaranteed
accuracy
1 year
Internal memory 8 MWords volatile RAM (SDRAM)
Clock functions Auto calendar, auto leap year judgment, 24-hour timer
Clock accuracy ±3 s/day (@23C)
Timebase accuracy ±0.2 s/day while measuring (@23°C, 73.4°F)
Backup battery life Approx. five years for clock and settings (@23°C, 73.4°F)
Operating environment Indoors, Pollution degree 2, up to 2000 m (6562-ft.) ASL
Operating temperature
and humidity
0 to 40°C (32 to 104°F), 80% RH or less (non-condensating)
(temperature variation range is 10 to 40°C (50 to 104°F))
Conditions of
guaranteed accuracy
After 30 minutes warm-up
The 50/60 Hz cut-off setting is selected (see the Cut-Off Frequency Table)
Temperature and
humidity range for
guaranteed accuracy
Temperature 23±5°C (73±9°F), Humidity 80% RH or less (non-conden-
sating)
Storage temperature
and humidity
Temperature -10 to 60°C (14 to 140°F), Humidity 80% RH or less (non-
condensating)
Dielectric strength 3.0 kVAC for 1 minute (between each input channel and chassis)
350 VAC for 15 seconds (between input channels)
Dimensions Approx. 272W × 182.4H × 66.5D mm (10.71"W × 7.18"H × 2.62"D) (with-
out projections)
Approx. 272W × 234.8H × 66.5D mm (10.71"W × 9.24"H × 2.62"D) (with
two input units, without projections)
Mass Approx. 1.8 kg (63.5 oz.) (LR8400-20, without 370 g battery pack)
Approx. 2.6 kg (91.7 oz.) (LR8400 with two LR8500s, without 370 g bat-
tery pack)
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