ICENI/AI-04
9
MODULE OPERATION
9.1
Module Configuration
Following power up the ICENI/AI-04 module will wait for the master module to
automatically configure the Iceni node.
During the configuration process, the module health status indicator will flash green.
Following a healthy node configuration, the module health status indicator will light
green continuously.
If the ICENI/AI-04 module loses communication with the master module, a self-reset
will take place and the module will await re-configuration. During this period, the
health status indicator on the ICENI/AI-04 module will flash green.
Following a ‘cold’ power up each channel will take up to approximately 15 seconds to
initialise and present a measurement value. However, the value may not be accurate
until the module has reached a stable operating temperature. It is recommended that
the module is left to ‘warm up’ for at least thirty minutes before the values are
considered accurate.
Following a ‘warm’ power up (where the power has been removed for greater than
two minutes) each channel will take up to approximately 15 seconds to initialise and
present a measurement value. However, the value may not be accurate until the
module has reached a stable operating temperature. It is recommended that the
module is left to ‘warm up’ for at least five minutes before the values are considered
accurate.
9.2
Signal Configuration
Each signal input can be configured to accept a PT100, PT200, PT500 or PT1000
type RTD sensor. Configuration is initiated by pressing the pushbutton on the
ICENI/AI-04 module and then following the configuration procedure provided by the
master module display.
9.3
Signal Measurements
The resistance across the sensor, and across the cable loop is measured at each
input channel and combined in a calculation to establish the temperature sensed by
each RTD sensor.
This real world measured temperature value (in °C or °F) is made available to the
field communications network and shown on the master module display.
Scaling for input signals is such that a value of 500 represents a real world measured
temperature of 500°C or 500°F, according to the temperature units selected.
Pub_3645
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