The LA-1400/4400 series Sound Level Meter does not support the USB storage class, so the USB memory cannot be used as an external memory.
The USB specification of the LA-1400/4400 series is described in the operation manual as "Communication device class/ Printer class". This is the RS-232C communication method by using the USB hard called "Virtual COM port connection". According to this, the programming is necessary as it for the RS-232C connection. (Even at the PC side, the COM port can be seen as connected.)
LA-1410/1440/4440 USB specification
|USB interface||USB specification||USB 2.0 FULL SPEED|
|Applicable class||Communication device class/ Printer class|
|USB serial number||1 to 16, Used only in the communication device class.|
In opposition to this, the USB specification of the LA-2560/5560/5570 is "Storage class".
LA-2560/5560/5570 USB specification
|Interface||USB 1.1 standard|
|Data rate||12 Mbps FULL SPEED|
|Device class||Storage class|
|Applicable cable||USB A connector male – USB minB connector (5 pin) cable|
When the device class is storage class, mass storage class or USB mass storage class, the USB can be used as an external hard disc.