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DATA ACQUISITION SOFTWARE

DAC Express Release 3.5

Time Is Precious

When your new product introduction date is set in stone and you

aren’t finished testing, you can’t afford to waste time with tedious

programming tasks. DAC Express is fast to set up because it

requires no programming. Connected hardware is auto-identified

and ready for assignment to measurements.

Good Data The First Time

Performance validation testing of a new product requires a data

acquisition system with answers you can trust. Non-repeatable

results are not results at all. With features like superior self-

calibration and certified accurate measurements, VTI measurement

hardware provides all the measurement performance and reliability

you need.

Combined Dynamic And Static

Measurements

Combining high-speed measurements of noise or vibration signals

and low-speed measurements of temperature, strain, and more,

makes DAC Express the workhorse system of its class. High-speed

sample rates can be set up to 196.6 kSa/sec/ch. Low-speed

scanned sample rates can be set up to 1.25 kSa/sec/ch for 64

channels. In the standard configuration, all data goes to the host

PC hard drive. For higher data transfer rates, the optional VTI

data disk sends high and low-speed data streams to separate

disks, ensuring continuous data rates of up to 9.25 MSa/sec for

high-speed measurements and more than 400 kSa/sec for low-

speed measurements.

Data Recorder Configuration

If your need is for noise and vibration measurements only, using

microphones, accelerometers, or other voltage transducers, just

connect your inputs to this system and go. Digital anti-alias filters

on the high-speed channels can be set to Elliptical, Bessel for

transient response testing, FIR for linear phase response, or off.

(Note: FIR anti-alias filter is only available for the VT1432B/VT1435/

VT1436 modules.) Data recording is real time with no gaps in data.

Online displays include time records and single-block FFTs (may

have data gaps due to lower priority than recording).

Data Logger Configuration

The simple name understates its power. Focusing on low-speed

measurements such as temperature, strain, and more, the

data-to-disk transfer rates of greater than 400 kSa/sec (for multiple

modules) can be maintained while on-line monitoring displays

show key values for the operator.

Multi-function Data Logger Configuration

Sometimes you need more than just analog data. If your job

requires recording digital states, relay settings, shaft rpm, pulse

train rates, or similar parameters in addition to analog signals, this

system is the answer. You can easily configure a mix of channel

types using DAC Express.

Structural Strain Measurements

Stress and fatigue testing of large structures has special

requirements. VTI’s solution provides structural test engineers with

the performance needed for these large-scale tests. The Ethernet

controlled 48-channel, high-performance remote strain gauge

measurement unit offers built-in calibration and 24-bit resolution,

providing very high data resolution and accuracy. Ethernet control

allows for remote operation, which reduces cable lengths. The

RJ-45 connector reduces transducer connector costs. Up to 500

channels of strain measurement are easily supported by

DAC Express.

Precision Temperature Measurements

Today’s leading suppliers of power generation and energy

delivery products require cutting edge technology and superior

performance to meet the world’s most demanding energy

requirements. Testing is a key aspect of gas and wind turbine

manufacturing to ensure reliability and efficiency. R&D facilities

depend on the superior measurement accuracy that is delivered

by the EX1000A series to improve the efficiency of new designs.

The intuitive DAC Express interface allows fast setup of over 450

measurement channels to facilitate test readiness. High accuracy

measurements can be recorded at up to 1000 samples/sec/

channel.

No Programming Required

The intuitive software user interface simplifies the time-

consuming tasks of:

 • Configuringhardware

 • Conditioningtransducers

 • Settingmeasurementrates

 • Developingdisplayroutines

 • Creatingdatafiles

 • Exportingdataforanalysisandreportgeneration

It’s all as simple as 1-2-3:

1. Setup

2. Record

3. View

Auto Instrument Discovery

If VTI data acquisition instruments are powered up and connected

to your PC, DAC Express will automatically identify those resources

for you. All installed signal conditioning is also identified so there is

no question about which signals you can measure.

No Hardware Yet? No Problem!

Get a head start even before you have hardware. Use the DAC

Express “simulate” mode to preconfigure instruments, then install

the instruments when they’re available.

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VXI VT1433B Especificaciones Pagina 3

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