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USB DrDAQ Programmer's Guide 1
Copyright © 2010-2011 Pico Technology Ltd. All rights reserved. usbdrdaqpg.en
1 Introduction
1.1
Overview
The USB DrDAQ PC Data Logger is a medium-speed, multichannel voltage-input
device for sampling data using a PC. This manual explains how to use the Application
Programming Interface and drivers to write your own programs to control the unit.
You should read it in conjunction with the
USB DrDAQ User's Guide .
The Software Development Kit for the USB DrDAQ is compatible with Microsoft
Windows XP, Vista and 7 (32-bit and 64-bit editions).
1.2
Safety warning
USB DrDAQ ground is connected directly to the ground of your computer. As with
most oscilloscopes and data loggers, this is done in order to minimise interference.
You should take care not to connect the ground (screw terminal, outer shell of BNC or
exposed metalwork) of USB DrDAQ to anything which may be at some voltage other
than ground, as doing so may cause damage to the unit. If in doubt, use a meter to
check that there is no significant AC or DC voltage.
For computers that do not have an earth connection (for example, laptops), it must be
assumed that USB DrDAQ is not protected by an earth (in the same way a battery
multimeter is not protected by an earth).
The scope channel on the USB DrDAQ has a maximum input voltage range of ±10 V.
The maximum input voltage for all other inputs is 0 to 5 V. Any voltage in excess
of ±30 V may cause permanent damage to the unit.
The unit contains no user serviceable parts: repair or calibration of the unit requires
specialised test equipment and must be performed by Pico Technology Limited.