Aethlabs microAeth MA200 Operating Manual page 14

5.4. Power
5.4.1. Charging
Input: 100~240 VAC 50/60Hz 0.4A, Output: 5VDC / 2A, with option for Type A, C, G, or I plug
It is highly recommended to use the DC barrel jack for charging and power. Power via USB may
introduce additional noise to measurement data.
Charging times with instrument turned off:
MA200:
Fast charging DC via barrel jack AC adapter: ~3 hours
USB charging: ~6.5 hours
MA300:
Fast charging DC via barrel jack AC adapter: ~11.75 hours
USB charging: ~25.75 hours
MA350:
Sealed connector for fast charging DC via barrel jack AC adapter: ~11.75 hours
USB charging on inside panel: ~25.75 hours
5.4.2. Turn on
The on-board user interface on the front of the microAeth can be used to turn on the instrument.
1) To turn on the microAeth, press and hold any one of the three buttons for 2 seconds. The screen and
instrument will turn on.
5.4.3. Turn off
The on-board user interface on the front of the microAeth can be used to turn off the instrument.
1) Use the left and right buttons to scroll through the top level menu options to 'Turn Off'.
2) Press the center button to select the 'Turn Off' option. The screen and instrument will turn off.
5.5. Communication
5.5.1. On-board user interface
The microAeth has an on-board user interface with a backlit low power screen and three buttons.
5.5.2. USB 2.0
The microAeth has a USB 2.0 full speed port for communication with the cross-platform microAeth
Manager software for configuring the instrument settings and downloading data.
The AethLabs provided mini-B to Type A USB cable can provide communication and power to and from the
device, although it is not recommended for providing power to the microAeth while making measurements.
A USB connection to a computer running the microAeth Manager software can be used to communicate
with the device. Charging through the USB port is at a slower rate than the barrel jack AC adapter. It is
highly recommended to use the DC barrel jack for charging and power while making measurements.
26 microAeth MA Series MA200, MA300, MA350 Operating Manual
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5.5.3. 3.3V TTL Serial
The microAeth has a 4-pin serial port for communication through 3.3V TTL serial with external data
acquisition systems or for direct integration into another system.
Communication though the 3.3V TTL serial port can be established to a computer through a terminal
emulator using the custom AethLabs 4-pin Serial to USB converter cable. The terminal emulator settings
are as follows:
Baud Rate
1000000
Before using the AethLabs 4-pin Serial to USB converter cable, it may be required to install drivers
from Future Technology Devices International Ltd. (FTDI) in order for the converter cable to be
recognized by and used with the computer.
A bare leads serial cable is available from AethLabs for custom integration work.
CAUTION: Interfacing to the serial port for customization and integration requires care, a short of the
power supply or improper grounding practices could cause additional instrument noise and / or in
the case of a short circuit or over-voltage / over-current, damage to the instrument.
5.5.4. Wi-Fi
The microAeth has 802.11b Wi-Fi with AES hardware encryption built-in.
5.5.5. Bluetooth Low Energy
The microAeth has Bluetooth Low Energy built-in.
5.6. Instrument Operating Parameters
5.6.1. Date/Time: Timezone offset (microAeth Manager only)
The timezone offset setting permits the user to select a timezone offset from GMT to be used as part of the
ISO 8601 time and date format in the instrument and recorded with instrument measurement data.
5.6.2. Flow setpoint
The sampling flow setpoint setting permits the user to select a flow rate setpoint of 50, 100, or 150 ml/
min. It is recommended to use lower flow rates in areas with high BC concentrations, and higher flow rates
when maximum sensitivity is required in areas of low BC concentrations. A lower flow rate should also be
selected for longer run times and extended battery life. Please read section 5.2 Recommendations for Best
®
Use Practices for more information.
AethLabs AethLabs
Data Parity Stop
8 bit none 1 bit
microAeth MA Series MA200, MA300, MA350 Operating Manual
®
Flow control
none
(Xon/Xoff for firmware update)
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