Vaisala HMM100 - Manual (Page 29)

Chapter 4 _________________________________________________________________ Operation
VAISALA ________________________________________________________________________ 27
CHAPTER 4
OPERATION
This chapter contains information that is needed to operate the HMM100.
Using the Service Port
The HMM100 has an RS-232 interface on the component board for
service use. You can connect to it through the 4-pin M8 service port
connector on the module. Vaisala offers an optional USB cable (Vaisala
order code 226068) for connecting the module to your PC.
NOTE The service port is intended for short-term use such as calibration. For
permanent installation, use the analog output.
The cable does not provide operation power to the module; you must
power it normally through the screw terminals.
If you have not used the HMM100 USB cable before, install the driver
that came with the cable. Refer to section Installing the Driver for the
USB Cable below for detailed instructions.
Installing the Driver for the USB Cable
Before taking the USB cable into use, you must install the provided USB
driver on your PC. When installing the driver, you must acknowledge
any security prompts that may appear.
1. Check that the USB cable is not connected. Disconnect the cable if
you have already connected it.
2. Insert the media that came with the cable, or download the driver
from www.vaisala.com.
3. Execute the USB driver installation program (setup.exe), and
accept the installation defaults. The installation of the driver may
take several minutes.
4. After the driver has been installed, connect the USB cable to a USB
port on your PC. Windows will detect the new device, and use the
driver automatically.