DI-2108XL

DI-2108XL High Speed USB Data Acquisition and Data Logger System with Windaq software and 32GB USB flash drive. Features 8 differential analog 10V input channels, and stand-alone data recording to removable USB thumb drive.

DI-2108XL delivers premium analog performance at a surprisingly affordable price. The differential input configuration provides noise rejection, easily adapts to singleended signal sources, and is protected up to ±50 V dc or peak ac so that inevitable measurement mishaps will not harm the instrument. The front-end feeds a flexible resolution analog-to-digital converter that ranges from 12 to 16 bits as a function of sampling rate. Lower sampling rates deliver higher resolution readings. Rounding off the analog subsystem are anti-alias filters per channel with automatic selection of corner frequency at approximately one tenth of the sampling frequency.

DI-2108XL provides 7 digital ports, each configurable as an input or a switch. Input protection is provided to 25 V. When activated as inputs two ports allow dual functionality as discrete inputs, or programmed as a counter or rate input. The rate input features a 50 kHz maximum measurement allocated over twelve programmable measurement ranges (10 Hz to 50 kHz full scale.) The counter input provides 16-bit resolution and a terminal count value of 65,535. The discrete, counter, and rate inputs are members of the same internal scan list used by the analog input channels. This means that all enabled elements are acquired synchronously, which allows meaningful comparisons between analog and digital channels. For example, the rate input measuring engine speed allows rpm data to be acquired in lock-step with analog data. Configured as a switch a digital port can be used to control external loads up to 25 V @ 100 mA, and the switch can be controlled asynchronously without interfering with the scanning process.

A USB drive is used to record data in stand-alone mode. Two file formats are supported, Excel compatible CSV file forma and WinDaq file. With Excel compatible CSV format, DI-2108XL can record 200 rows of data per second. With WinDaq file, sample rate of 160K is possible with industrial grade SCL microSD card.

Real Time Trigger Excel Link

The DI-2108XL comes with WinDaq ExcelLink. It provides real-time conection to Excel spreadsheet (32- or 64-bit) and can stream data to Excel spreadsheet at high speed. Four trigger methods are provided - two-point window trigger, one-point slope trigger with pre- and post-trigger data, manual single row and block trigger, and programmable event driven single-row trigger.

Even though Excel can store over 1,000,000 rows of data, it is still a small buffer for high speed data aquisition unless trigger modes are utilized so that only data of interests is captured. ExcelLink supports advanced math to construct trigger methods. Window trigger can capture signals inside or outside a range. Slope trigger with pre- and post- trigger can capture signals before and after a predefined trigger point. Event trigger can capture a single row of data at the moment trigger conditions are met. Derivative trigger to trigger on rate of change, such as a glitch. Manual trigger can capture signals at operator's key instruction.

With data directly streaming to Excel, powerful real time analysis and many charting options are available, such as grouping multiple channels in a single chart.