Vaisala HUMICAP HMM170 - Operation; Using Service Port; Installing Driver for the USB Service Cable

5. Operation
5.1 Using service port
HMM170 has a 4-pin M8 service port connector on the component board. Vaisala oers an
optional USB cable (Vaisala item code 219690) for connecting the module to your PC.
The service port is intended for short-term use such as calibration. For permanent
installation, use the permanent digital Modbus and/or analog terminals.
If you have not used the HMM170 USB cable before, first install the driver.
5.1.1 Installing driver for the USB service cable
Only Windowsâ operating systems are supported by the driver of the USB
service cable.
1. Connect the USB service cable to a USB port on your computer. Windowsâ detects the
new device and installs the appropriate driver.
2. Open Devices and Printers from the Windowsâ Start menu. Use search to find it if
necessary (search for "devices").
3. Locate the cable in the list of devices:
• If the device is listed as Vaisala USB Device with a COM port number in brackets, the
cable is ready for use. Note the COM port number, you will need it later.
• If the device is listed as Vaisala USB Instrument Cable without a COM port number
listed, you must install the driver manually.
Chapter 5 – Operation
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