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Aer 5400
a
a) Tube connection to pump or vacuum supply
b) Socket vor switch outputs related to alert signals
c) Buzzer
d) Fuse
e) Mains power connection
f) RS232 or RS484 connector
g) Optional sensors for CH4 und CO
2. Power supply
The unit is powered by mains power supply. There is an internal battery which ensures the operation
(several hours) of the electronics (not the pump) even if the power fails. The battery will be charged
as soon as the mains power is present. If the battery remains without recharging of longer periods, a
deep discharge prevention circuit will disconnect the entire electronics. Then, the display switches
completely off. After connecting the power supply it takes a few minutes to reach the battery voltage
threshold which is required to turn on the unit again.
3. Filter replacement and flow control
The aerosols are accumulated at a manually replaceable filter or at a filter tape which will be
positioned automatically above the air inlet of the instrument. The detector located above the filter
measures simultaneously the decay of collected activity. The stepper drive ensures that exhausted
filter pieces move in to the housing. Two optical sensors detect the end of the filter tape. A warn
signal will be generated but it remains a piece of filter for one more step.
The filter drive can be controlled by several events which can be defined by the configuration of the
instrument:
6
f
d
b
c
e
Manual_Aer 5400_EN_27-04-2023.docx
g
SARAD GmbH 2023
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