Aethlabs microAeth AE51 Operating Manual page 14

2.8 Manual Flow Calibration
Procedure
In order to complete a manual flow calibration
of the microAeth, you will need to use the
AE51 FlowCal software. The installation of the
microAethCOM PC software automatically installs
the AE51 FlowCal software into the directory chosen
by the user during the installation process. Please
read section 2.5 microAethCOM PC Software for
more information about the installation process.
1. Install a clean, unused filter strip into the
microAeth. Please read section 2.3.2 Filter Strip
Installation and Removal for more information.
NOTE: A pre-used filter strip with heavy loading
may create an offset in the flow calibration table
of the microAeth.
2. Connect the external flowmeter to the inlet of
the microAeth.
3. Turn on the microAeth and the external
flowmeter. Let the flowmeter stabilize for at least
10 minutes before use.
4. Start the AE51 FlowCal software.
5. Connect the USB cable to the microAeth and the
computer. Wait until the microAeth establishes
communication with AE51 FlowCal software.
The status bar in the bottom left corner of the
software will show the connection status of
the microAeth and AE51 FlowCal software. If
the status bar does not show microAeth ON
status, check your connections and ensure that
communication with the microAeth has been
initiated as previously described and disconnect
the USB cable from the computer and reinsert it.
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®
6. Select the flow setpoint to calibrate from the
dropdown menu in the Manual calibration
section of the software. Then click the Set Flow
button.
7. The flow rate of the microAeth will change and
the text box to the right of Flow on AE51: should
be populated with the desired flow setpoint.
8. Use the + and - buttons to adjust the pump
speed of the microAeth until the flow rate on the
external flowmeter closely matches the selected
flow setpoint in the software.
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9. Then click the Save Flow Setpoint button to
save the setpoint calibration in the microAeth
flow calibration table stored in the instrument.
10. Repeat steps 6-9 for all flow setpoints in the
dropdown menu in the Manual calibration
section of the software.
NOTE: If the internal pump of the microAeth
cannot reach the highest flow rate setpoint,
contact AethLabs for further assistance.
11. Click the View Instrument Values button. This
will display all the values of the flow calibration
table.
12. Please check the values to make sure that as
the flow setpoint increases from 0 to 250 ml/
min, the pump drive and internal flowmeter
values also increase. If this is not the case,
please try again to calibrate the microAeth. If
this issue persists, please contact AethLabs for
further assistance.
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View Instrument Values
The View Instrument Values button requests the
contents of the flow calibration table stored in the
microAeth.
The flow calibration table shows the pump drive
values and internal flowmeter values for the
specified flow setpoints.
VERY IMPORTANT: As the flow setpoint increases
from 0 to 250 ml/min, the pump drive and internal
flowmeter values should increase. If this is not the
case, please try again to calibrate the microAeth.
If this issue persists, please contact AethLabs for
further assistance.
Save Instrument Values
The Save Instrument Values button will prompt the
user to select a location to save the flow calibration
table file.
The flow calibration table values will be read from
the microAeth and saved to a selected location
where it can be kept for archival purposes and
comparison, or can be retrieved and uploaded to the
microAeth at a later time.
Write Values to Instrument
The Write Values to Instrument button will prompt
the user to select a previously saved flow calibration
table file for upload to the microAeth.
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