1.5.13 Pneumatic Tubing
The pneumatic tubing inside this instrument is specially designed for use in Ecotech Serinus
instruments. It has the flexibility of Tygon tubing with the added inner sheath of Teflon to prevent
contamination of the sample. Care should be taken when removing and inserting the tubing into the
barbed fittings.
Figure 4 – Ecotech Tygon Tubing
1.5.14 Main Controller PCA
The main controller PCA controls all the processes within the instrument. As well as the on-board
microprocessor, it contains a battery backed clock, calendar, analog to digital converters and many
other circuits for signal processing and control. The ambient pressure and chassis temperature
sensors are also located on this board. The main controller PCA is located above all other
components within the instrument. It pivots on hinges to allow access to the components
underneath. The current revision of the main controller PCA for which this manual applies, has many
differences to previous revisions, highlighted by the many vacant component locations on the PCA.
CAUTION
Never place objects on top of the main controller PCA as it may result in damage.
1.5.15 Power Supply
The power supply is a self-contained unit housed in a steel case designed to meet all the relevant
safety and EMC requirements. This new revision of power supply is different to the previous revision
as there is no need to set the operating voltage switch because it is autoranging.
The output of the power supply provides +12V, +5V, -12V and +3.3V to the instrument.
1.5.16 On/Off Switch
The on/off switch is located on the back panel (bottom right facing the rear of the instrument). It is
part of the power supply.
1.5.17 Communications
Communication between the instrument and either a data logger, laptop or network can be
performed with the following communication connections located on the back panel (refer to Figure
7). These connections can be used for downloading data, onsite diagnostics, maintenance and
firmware upgrades.
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