Thermo Scientific 43iQ, Instruction Manual

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System Description
Permeation Oven (Optional)
8-4 43iQ Instruction Manual Thermo Scientific
The fluorescence chamber temperature is measured with a thermistor. The
voltage across the thermistor is fed to the main processor for use in
calculating and displaying the reaction chamber temperature. The voltage
across the thermistor is also compared to a set-point voltage and used to
control that the reaction chamber heaters to maintain a constant
temperature.
The 43iQ can be configured with an optional permeation oven for
generating SO
2
span gas. The permeation oven is configured as a DMC
module with self-contained temperature measurements and heater controls.
For more information, see “Internal Permeation Span Source” as described
in Chapter 9, “ Optional Equipment ”.
The common electronics contain the core computational and power
routing hardware for the 43iQ, and is replicated throughout other iQ series
products ( Figure 8–1 ). It also contains the front panel display, the USB
ports, the Ethernet port, and the optional I/O interfaces (RS-485, analog,
and digital).
Figure 8–2 shows the PCBA interconnect structure for the 43iQ, including
options. The modular design of the instrument is conveyed in the
architecture. Brief descriptions of the specific PCBAs follow.
Bench Heater
Permeation Oven
(Optional)
Common
Electronics