Hioki LR8431, Instruction Manual

Page: 150 / 204

Chapter 10 Specifications
142
(2) Measurement Functions
Common mode

rejection ratio
with 100

maximum signal source impedance
100dB minimum (with 50 or 60 Hz input and digital filter disabled)
140dB 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 enabled)
Broken wire

detection
(Temperature input) selectable On or Off, approx. 300 nA detection
current
Maximum input

voltage
30 Vrms or 60 V DC (analog input channel)
Maximum rated

voltage to earth
30 Vrms or 60 V DC (between each input channel and chassis, and
between input channels)
Anticipated transient overvoltage 330 V
Pulse input Non-voltage “a” contact (normally open)
open collector or voltage input
Maximum input
voltage 0 to 10 V DC
Maximum channel-
to-channel voltage Non-isolated

(channels use the Memory HiLogger common ground)
Maximum rated

voltage to earth
Non-isolated

(channels use the Memory HiLogger common ground)
Detecting level High: 2.5 V min., Low: 0.9 V max.
Pulse input period At least 200 µs (both H and L levels at least 100 µs)
Slope Either rising or falling edge pulse detection can be set for each
channel
Function Integrated count, revolution variation
Basic Specifications
Recording interval 10, 20, 50, 100, 200 or 500 ms; or 1, 2, 5, 10, 20 or 30 s; or 1, 2, 5,
10, 20 or 30 min; or 1 h
Recording length
(time span) Any, with continuous recording selectable
Recording repetition
function Repeatedly measures using the specified recording length
Timer function Records between specified start and stop times
Specifiable

waveform colors
24 colors