Firmware; Oxygen Sensor (Optional) - Thermo Scientific 42iQHL Instruction Manual

System Description

Firmware

Firmware
Oxygen Sensor
(optional)
8-8 42iQHL Instruction Manual
Like the hardware, the firmware is modular and located within
microprocessors distributed throughout the instrument. In the 42iQHL,
microprocessors containing firmware are located as follows:
Reaction Chamber/PMT DMC
●
Ozonator DMC
●
Flow/Pressure DMC
●
Peripherals Support Board
●
Optional I/O (Communications, Digital, and Analog)
●
Optional Oxygen Sensor
●
The firmware contains the active controls for their application, as well as
self-identification and configuration for "plug and play" style operation.
Each are associated with specific registers of two types:
Modbus registers that are communicated from each microprocessor to
●
the System Controller Board (SCB) via internal RS-485
SNMP registers that are maintained in the software and SCB for health
●
and data processing computation
The Modbus communication system operates on 1 second intervals.
Within those intervals, data treatment like integration (whether analog or
digital) and servo control, are embedded in the module firmware. The SCB
receives the 1 second updates for higher level "software" processing and
control via SNMP registers, some of which is interfaced with the front
panel Graphical User Interface (GUI).
In addition to the operating registers, the 42iQHL stores a historical data
log in a MySQL database. The memory is provided on the same micro SD
card where the operating software resides, for which there is capability to
store up to a year of data at 1 minute intervals. Chapter 3, "Operation"
describes how this database is accessed and used including external memory
downloads.
The 42iQHL can be configured with an optional DMC based Oxygen
(O ) Sensor. This sensor is a paramagnetic sensor for O
2
measurement and NO, NO
user to correct the NO
Selectable O concentrations can be used as the correction factor.
2
, and NO correction. This option allows the
2 x
readings for the amount of oxygen in the sample.
x
concentration
2
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