简要说明：

产品	应变、桥式测量USB数据采集模块
模拟输入	4DI
采样率	52.7 kHz/ch
精度/分辨率	±0.02% / 24-bit
连接设备	全桥、半桥、1/4桥应变片元件，桥式称重、压力、扭矩传感器

概述

The DT9838 module is a USB strain gage measurement device intended for full-, half, and quarter-bridge strain gage elements and bridge-based sensor assemblies such as load cells, torque sensors, and pressure sensors. General-purpose voltage measurements are also supported. It is compatible with USB 2.0 and USB 1.1 ports.

美国Data Translation DT9838是一款USB应变计测量的数据采集模块，可直接连接全桥、半桥、四分之一桥应变片元件和桥式传感器（称重传感器，扭矩传感器，压力传感器和通用型电压测量设备），并且兼容USB 2.0和USB 1.1端口。

特性

• 4路同步模拟输入，24-bit分辨率，另有1路速度计输入

• 可直接连接全桥、半桥电路类型传感器

• 1/4桥类型传感器需要在外部接入一个桥路电阻

• 直接电压信号量程为±250mV

• 内部电桥激励为0-10V，编程选择

• 每通道编程可选100 kΩ ±0.1%分流电阻

• TEDS (IEEE 1451.4) sensor class II compatible

• 软件可标定桥路偏置和增益

• 采样频率为52.734 kHz

• 可编程触发方式（软件触发、外部数字触发、数字阀值触发）开启模拟输入操作

• 同步总线(RJ45)用于扩展连接到4个DT9838或者DT9837x系列模块

• 支持VIBpoint软件，支持VC/C++, Matlab, labView 以及其他分析测试软件

参数

Transducer Support

In addition to strain gages, the DT9838 supports a variety of transducer types, including load cells, pressure transducers, and torque sensors that are based on the Wheatstone bridge.

A load cell, which consists of a number of strain gages, measures load and force by determining the deformation of a structural member as a load or force is applied. Pressure transducers, which consist of strain gages mounted on a diaphragm, measure the deformation of the diaphragm that is proportional to the pressure that is applied. Torque sensors, which consist of strain gages mounted on a torsion bar, measure the shear stress as the torsion bar turns that is proportional to the torque.

To use these transducers, configure the analog input channel for a full-bridge configuration. These transducers typically use 350 Ω nominal bridge resistance.

Instead of supplying a gage factor, use software to enter the sensitivity of the unit provided by the manufacturer of the transducer. For example, a load cell rated for 100 pounds with a 2 mV/V output has a full-scale output of 20 mV when using 10 V of excitation. Some transducers also support TEDS or virtual TEDS. The DT9838 provides TEDS support to interface to these transducers directly.

TEDS

Each analog input channel on the DT9838 module provides a Class II TEDS (Transducer Electronic Data Sheet) interface through the RJ50 connector. The interface consists of twowires (TEDS DATA and TEDS RETURN).

TEDS is supported by some load-cells and other sensors; it is not used with strain gages.

Input Resolution

The value that is measured across the bridge of an analog input channel on the DT9838 module is amplified and applied to the 24-bit Sigma-Delta analog-to-digital converter (ADC). The ADC oversamples the incoming signal, filters the values, and produces a result.

The resolution of the analog input subsystem is fixed at 24 bits.

Input Range

The default full-scale input range for each channel is ±250 mV.

A/D Sample Clock

The ADC master clock is generated by an internal programmable PLL and allows user programmable ADC sample rates from 195.3 S/s to 52734 S/s.

订货

订货型号

硬件

• DT9838

• DT9838-OEM

配件

• EP386

• EP394

• EP398

• STP STRAIN

• STP STRAIN 120

• STP STRAIN 350

软件

The following software is available for purchase separately:

• VIBpoint Framework

免费软件

The following software is available as a free download from our website:

• DAQ Adaptor for MATLAB

• LV-Link

型号

相关型号

DT9829

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