Hioki 8423 - Features

1.2 Features
10
The fastest recording interval is 10 ms, during which the input data of all chan-
nels is scanned. The recording intervals can be set in 19 steps from 10 ms to 1
hour.
* The recording interval is 5 seconds or longer when one or more channels are
set to humidity measurement.
A maximum of eight units can be connected to one 8423 Memory HiLogger to
enable the measurement of up to 120 channels. Furthermore, the synchronous
operation of five Memory HiLoggers facilitates the synchronized measurement of
600 channels.
The input circuits of all of the channels are isolated*. The maximum rated voltage
to earth is 600 VAC/DC, so voltage can be measurement safely.
* 8948 Voltage/Temp Unit and 8949 Universal Unit only.
For the 8996 Digital/Pulse Unit, each 3 blocks of 5 channels are isolated within
the unit.
A combination of 2 types of recording interval can be set within the system. The
recording intervals can be set individually by unit. Measuring with a recording
interval suitable for each measurement object allows for efficient use of space in
the internal memory or CF card.
See "5.3.1 Setting Function and Recording Interval" (p. 77).
The following four types of unit can be used in accordance with the purpose of
use. The input terminal block is removable to enable connections to be made
easily.
• Model 8948 Voltage/Temp Unit and 8949 Universal Unit
There are 15 channel inputs per unit. Measurement is possible for voltage,
nine types of thermocouple, two types of resistance temperature detector*,
and humidity* (an optional sensor is required).
* Model 8949 Universal Unit only
• Model 8996 Digital/Pulse Unit
There are 15 channel inputs per unit. Logic input and pulse input can be set
for each channel. Logic signal, totalization, and rotation rate measurement are
possible.
• Model 8997 Alarm Unit
There are 15 channel outputs per unit. Alarm output (open collector output)
allows for controlling external devices.
1.2 Features
10 ms Recording Intervals*
Multiple Channels (Up to 600 Channels)
Isolated Input Circuits
Dual Sampling
Flexible System Configuration