Some Instruments use a Virtual COM Port to communicate with your
computer. Such instruments will have an alternate connection, for example a USB
connection. When installing, you should have noticed that two drivers were
installed to your computer - a USB driver and a Serial (COM) port driver. These
instruments communicate with the virtual COM port using the COM port driver.
The following instruments use a virtual COM Port: DI-145; DI-148U;
DI-158U; DI-158UP; DI-245; all DI-710 USB versions; all DI-715B USB versions; all
DI-718B USB versions.
Accessing the Device Manager to determine
the COM port designation for your Virtual COM Port USB Device
1. Open the Windows Device Manager. The Windows Device
manager can generally be found by holding the Windows key down then pressing the
Pause/Break key on your Windows keyboard to access the System Properties window.
From there, the Device Manager should be accessible but may require an extra
click or two (for example, in XP, click on the Hardware tab then on the Device
Manager button).
2. Find Ports (COM & LPT) and
expand by clicking the + box to the left. This shows all COM and LPT ports
currently assigned on your computer.
3. Find DATAQ DIxxx (COM#) - # is
the COM port designated for your device.
4. Change the COM port Number of
your Device.
a. Right-click
on DATAQ DIxxx (COM#).
b. Click on
Properties.
c. Click on
the Port Settings tab.
d. Click on
the Advanced button.
e. Click the
down arrow on the COM Port Number drop-down menu.
f. Select an
alternate COM port number (MUST be COM 16 or lower).
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