PMT Cooler
The PMT cooler ensures that the PMT is operated at a constant 13 deg C. This reduces the
measurement noise of the PMT.
PMT High Voltage Supply and Preamplifier Module
This is a single component within the PMT housing. Its function is to supply high voltage to the PMT
and to amplify the photocurrent signal from the PMT.
1.5.10 Main Controller PCB
The main controller PCB controls all the processes within the instrument. It contains a battery backed
clock, calendar and an on-board microprocessor. The main controller PCB is located on top of the
other components with the analyser. The PCB pivots on hinges to allow access to the components
underneath.
CAUTION
Never place objects on top of the main controller PCB as it may result in damage.
1.5.11 Power Supply
The power supply is a self-contained unit housed in a steel case.
It has a selectable input voltage of 115 or 230 VAC 50/60 Hz and an output voltage of 12 VDC power
for distribution within the analyser.
CAUTION
Input voltage can be manually changed by sliding the red switch left (230) for 220-
240V or right (110) for the 100-120V. Ensure the switch is set to the correct
voltage (from supply) before switching on.
1.5.12 On/Off Switch
Located on the back panel (bottom right facing the rear of the instrument).
1.5.13 Communications
Communication between the analyser and either a data logger, laptop or network can be performed
with the following communication connections located on the back panel (see Figure 4).
RS232 #1
This port is designed to be used for simple RS232 communication.
RS232 #2
This port is designed to be used for simple RS232 communication, or in multi-drop configuration.
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