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| Services Available | |
|---|---|
| Repair | Yes |
| Free Support | Yes |
Resumen
El DMM600 es un equipo de mano alimentado con pilas que mide de forma precisa el contenido de humedad del material orgánico en descomposición que cubre el suelo del bosque, que es crítico para quienes realizan quemas controladas así como en la lucha contra el fuego forestal. El DMM600 es un dispositivo autónomo (no necesita datalogger). Incluye colador, bolsa transporte y software.
Leer másVentajas y características
- Mide el contenido de agua del material orgánico en descomposición que cubre el suelo del bosque
- Compacto y fácil de llevar
- Fácil de usar—poner material en la cámara, prensar, y obtener la lectura en tiempo real
Imágenes
Descripción detallada
The DMM600 uses measurement methods sensitive to the dielectric properties of the material being measured. It consists of a cylinder that houses the electronics, a sample chamber with a compression knob, and an LCD readout.
To measure duff water content, place the sample in the sample chamber and turn the compression knob until an audible indicator signals that the sample is properly compressed and the measurement is complete. Total time for measurement is about 30 seconds. Readings are displayed in real-time only; measurements are not stored.
The DMM600 was developed in cooperation with the USDA Forest Service, Rocky Mountain Research Station, and Missoula Technology and Development Center.
Especificaciones
| Battery | 9 V alkaline |
| Measurements per Battery | More than 2,000 |
| Precisión | ±5% full scale range |
| Resolución | 1% volumetric water content |
| Sieve Description | #4 mesh = 0.475 cm (0.187 in.) |
| Diameter | 8.9 cm (3.5 in.) |
| Longitud | 25.4 cm (10 in.) |
| Peso | 1.7 kg (3.7 lb) |
Typical Current Drain |
|
| Between Measurements | ~3 mA (Goes into a low-power sleep mode after five minutes of inactivity.) |
| Modo reposo | 140 μA |
| Durante la medida | 85 mA for ~1 ms |
Compatibilidad
Data Logger Considerations
The DMM600 is a stand-alone product so data logger compatibility is not an issue.
Software
PCDMM Software is supplied with the DMM600. It interfaces with the DMM600 using serial communications, and is used to download and upload calibration coefficients, monitor the battery voltage, and reset the DMM600.
Calibration Coefficients
A standard calibration converts the output of the measurement circuit to volumetric water content. User-derived calibrations can be downloaded using PCDMM software. These calibrations are useful when using the DMM600 with atypical materials. Guidance is provided in the operating manual for deriving calibrations. This feature can also be used with known duff bulk density to convert result to gravimetric water content. Measurements derived from the standard and user-defined calibrations are alternately displayed on the LCD if a user-defined calibration has been downloaded.
Sieve and Carrying Case
The DMM600 comes with a sieve and case. The sieve fits in the opening of the sample chamber. Duff is moved through the wire mesh of the sieve to break up large fragments and improve measurement accuracy in duff materials with a large range of fragment sizes.
The case eases transport and provides storage for the sieve and small items such as a spare battery, screwdriver, and pencil.