B&K 2250 Light, User Manual, Page: 92 / 208

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2250 Light – User Manual
9.2.3 Downgrade to an Earlier Version
It is possible to downgrade to an earlier version of the software:
1) Within the server address (see Fig.9.2) change the text “latest” to the desired software
package, e.g., “SW22.”
2) Press Check for updates .
3) Follow the procedure described in section 9.2.1 or section 9.2.2.
Note: Only the software package SW24 or newer can be downgraded to another package.
Software packages down to SW21 are available for update through the Internet.
9.3 Troubleshooting
9.3.1 2250 Light Measurements
If your 2250 Light measurement seems to be wrong, then:
• Check the cabling, if any
• Check that the microphone, including preamplifier, is correctly mounted in the top socket
(or correctly connected to the extension cable)
• Check that the transducer you have mounted on your 2250 Light is selected as the
Transducer Used parameter, this is also found in the Setup menu
• Check whether the parameters for the selected transducer ( Transducer Used ) are set
correctly, especially the Microphone Type parameter. This is found by tapping the Main
Menu icon , then Transducers
• Check that the Sound Field and Windscreen Correction parameters have been set correctly.
These are found by tapping the Main Menu icon , then Setup, followed by Input
• Check if the calibration is OK (make a new calibration using an external calibrator)
9.3.2 SD/CF Cards and USB Sticks
The Logging and Signal Recording software requires that measurements are saved on memory
cards – SD or (with hardware versions 1 – 3) CF. A USB memory stick can be used from
hardware version 4.
Device Format and Speed
In order to ensure reliable operation with the memory device, the format of the file system and
the speed of the device are tested. Upon insertion, the analyzer verifies the format of the
memory device’s file system. If the file system is not optimal for usage with the analyzer, then
you are prompted to format it. You will be guided through the process.
When the format of the file system has been accepted, then the speed of the device is tested.
The test writes data to the device and measures the writing speed. The test takes less than a
minute. If the speed test is successful, then you can proceed using the device, otherwise you
should use another memory device or try reformatting the device (if not done already).