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DOT600 路基含水量测量计
Services Available
Repair No
Calibration No
Free Support No

概览

DOT600为独立工作的产品，用于测量路基和地基中泥土材料样本的体积和重量含水量。便携式的快速而精确的测量设备，使得DOT600成为建筑工地和岩土测试实验室中评估路基材料的宝贵工具。

优势与特点

  • Measures water content, bulk density and compaction force, and volume and weight of soil samples
  • Integrated data logger for quick results
  • High accuracy and high precision
  • Includes a rugged case and is completely portable
  • Generates a measurement report that can be easily imported into spreadsheets

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技术说明

DOT600含有一个样品腔、CR850数据采集器、PC200W软件、市电转换充电器和一个结实的运输箱。从实验室或野外站点收集的样品放置在样品腔内，压实到选中的压力（15 至 45 psi）。然后使用介电常数敏感方法计算出含水量。独立的标尺和磁线性传感器测量样品的体积。最后，CR850计算容重密度，将测量的体积含水量转换成重量含水量，并将数据在表格数据的形式存储在永久内存中。

含水量测量的 精度/校准

通过将DOT600测得的含水量与独立的确定值相比较，来定义精度。含水量的确定值通过称重法获得（先称湿样的重量，再烘干称干重）。

DOT600和含水量测量是使用校准曲线将传感器输出周期转换成体积含水量。校准曲线由工厂参考几种不同的土壤类型获得。校准系数使用选取的Matrl类型土壤来确定。在土壤含水量从空气干燥到70%饱和的范围内，对砂质壤土进行的重复性测量显示，独立测量的偏差小于等于 ±1.5%体积含水量。

由于重量含水量是由测得的体积含水量结合样品的体积和重量转换而来，受体积和重量测量误差的影响，重量含水量的精度仳体积含水量的精度要差一些。

产品规格

-NOTE- Refer to the CR850 product brochure for CR850 specification information.
Outside Case Dimensions 55.9 x 43.2 x 21.6 cm (22 x 17 x 8.5 cm)
Shipping Weight 10.64 kg (23.45 lb)

Battery
Type 2.9 Ahr rechargeable sealed lead-acid
Standby Charge Retention 95% (at 20°C for one year)
Life Expectancy ~500 cycles (with discharge to 50% followed by recharge)

Scale
Capacity 1000 g (35.3 oz)
Accuracy ±0.05 g (±0.002 oz)
Repeatability 0.02% FS

Water Content Measurement
Resolution 1% volumetric water content
Resolution is the minimum change in the measured parameter, water content, that the sensor can repeatedly detect.
Precision 0.75% volumetric water content
Precision is the expected range for repeated measurements on the same sample.

Sample Volume & Applied Force Measurement
Sample Volume ±1.5% (for compressed sample with thickness between 0.400 and 1.000 in.)
Sensitive Volume Electromagnetic field penetrates the sample 0.39 in. Sensitive volume is about 3.5 in.3.
Applied Pressure Range 0 to 45 psi
Applied Pressure Measurement Accuracy 1.7 psi

兼容性

Components

The DOT600 is a stand-alone system that includes all of the components required to make and store the measurements.

Standard Equipment

  • CR850 datalogger
  • Wall transformer with cable and connector to charge DOT600 from AC power source
  • Sample chamber base
  • Sample chamber cylinder
  • Ratcheting box-end wrench
  • Compression cap
  • Sieve, 4 mesh
  • DOT600 operating manual
  • RS-232 serial cable
  • PC200W software

Optional Equipment

The following equipment are ordered as Common Accessories (see Ordering Info).

  • CR1000KD—keyboard/display for situations in which an external keyboard display is useful.
  • SC32B—optically isolated RS-232 interface for connecting the CR850 to the RS-232 port on an ac-powered PC.
  • SC-USB—optically isolated USB interface for connecting the CR850 to the USB port on an ac-powered PC.