Prevents ice from coating the transducer
Overview
SR50AH加热的声音距离传感器提供了一种用于确定雪深的非接触方法。它通过发射超声波脉冲来确定深度，然后测量脉冲的发射与返回之间的经过时间。需要空气温度测量来校正空气中声速的变化。SR50AH包括一款集成加热器，可防止冰和霜涂覆换能器。
Read MoreBenefits and Features
- Integrated temperature probe for providing temperature correction of measurements
- Non-contact method for determining snow depth
- Integrated transducer heater; rugged enough for rime and ice environments
- Wide operating temperature range
- User-selectable options for output
- Uses a multiple echo processing algorithm to help ensure measurement reliability
- 与大多数坎贝尔科学数据记录器兼容
传感器的加热器电缆不能在现场中更换，并且必须发送到服务部门进行更换。一种Returned Material Authorizationis required.
Images
Detailed Description
The SR50AH was designed to meet the stringent requirements of measuring depths and uses a multiple echo processing algorithm to help ensure measurement reliability. The addition of a heating element around the transducer prevents ice and rime from coating the transducer with minimal power requirements.
SDI-12, RS-232, and RS-485 output options are available for measuring the SR50AH. Campbell Scientific’s MD485 interface can be used to connect one or more SR50AH sensors in RS-485 mode to an RS-232 device. This can be useful for sensors that require lead lengths that exceed the limits of either RS-232 or SDI-12 communications.
Specifications
| 测量时间 | < 1.0 s |
| Output Options | SDI-12 version 1.3, RS-232, RS-485 (output options selected by configuring internal jumpers) |
| 波特率 | 1200 to 38400 bps (RS-232, RS-485 modes) |
| 电源要求 | 9 to 18 Vdc (typically powered by data logger’s 12 Vdc power supply) |
| 测量范围 | 0.5 10米(1.6到32.8ft) |
| Beam Acceptance | ~30° |
| Resolution | 0.25毫米（0.01英寸） |
| 准确性 | ±1 cm (0.4 in.) or 0.4% of distance to target (whichever is greatest). Requires external temperature compensation. |
| Temperature Accuracy |
|
| Operating Temperature Range | -45°至+ 50°C |
| Compliance | CE兼容 |
| Length | 10.1 cm (4.0 in.) |
| Diameter | 7.5 cm (3 in.) |
| Cable Weight | 250 g (8.2 oz) for a 4.57 m (15 ft) cable |
Maximum Cable Length |
|
| -NOTE- | Cable lengths greater than 60 m require a heavier gage wire if the power supply drops below 11 Vdc. |
| SDI-12 | 60米（200英尺） |
| RS-232 | 60米（200英尺） Baud rates ≤ 9600 bps |
| RS-485 | 300 m (984 ft) |
Heater |
|
| 加热器抵抗 | 75 ohm |
| Nominal Operating Voltage | 12 V (ac or dc) Use a properly conditioned low-noise power source. A noisy power source will affect operation of the sensor. |
| Maximum Rated Wattage | 3 W |
| Maximum Rated Voltage | 15 V (ac or dc) |
| Maximum Operating Temperature | 25°C 在25°C以上的温度下关闭加热器电源。这可以防止传感器损坏并降低功耗。 |
Compatibility
Note:The following shows notable compatibility information. It is not a comprehensive list of all compatible or incompatible products.
Data Loggers
| Product | Compatible | Note |
|---|---|---|
| 21X.(retired) | SDI-12 | |
| CR10(retired) | SDI-12 | |
| CR1000(retired) | SDI-12 and RS-232. For RS-485, requires an MD485 interface or similar RS-485 to RS-232 interface. | |
| CR1000X | SDI-12 and RS-232. For RS-485, requires an MD485 interface or similar RS-485 to RS-232 interface. | |
| CR10X(retired) | SDI-12 | |
| CR200X(retired) | SDI-12 | |
| CR206X(retired) | SDI-12 | |
| CR211X(retired) | SDI-12 | |
| CR216X(retired) | SDI-12 | |
| CR23X(retired) | SDI-12 | |
| CR295X(retired) | SDI-12 | |
| CR300 | SDI-12 and RS-232. For RS-485, requires an MD485 interface or similar RS-485 to RS-232 interface. | |
| CR3000 | SDI-12 and RS-232. For RS-485, requires an MD485 interface or similar RS-485 to RS-232 interface. | |
| CR310 | SDI-12 and RS-232. For RS-485, requires an MD485 interface or similar RS-485 to RS-232 interface. | |
| CR500.(retired) | SDI-12 | |
| CR500.0(retired) | SDI-12 and RS-232. For RS-485, requires an MD485 interface or similar RS-485 to RS-232 interface. | |
| CR510(retired) | SDI-12 | |
| CR6 | SDI-12, RS-232, and RS-485 | |
| CR800 | SDI-12 and RS-232. For RS-485, requires an MD485 interface or similar RS-485 to RS-232 interface. | |
| CR850 | SDI-12 and RS-232. For RS-485, requires an MD485 interface or similar RS-485 to RS-232 interface. | |
| CR9000(retired) | ||
| CR9000X(retired) | SDI-12 and RS-232. For RS-485, requires an MD485 interface or similar RS-485 to RS-232 interface. |
Distributed Data Acquisition
| Product | Compatible | Note |
|---|---|---|
| GRANITE 6 | SDI-12 and RS-232. For RS-485, requires an MD485 interface or similar RS-485 to RS-232 interface. |
额外的兼容性信息
Data Logger Considerations
One single-ended channel per probe is required; an excitation channel can be shared by several probes.
Downloads
SR50AH heater control programs v.1 (4 kB)01-22-2020
CR6 and CR1000X programs that read the SR50AH SDI-12 output and control the SR50AH heater. A 107 sensor provides the temperature measurement needed for temperature compensation. The programs use the data filtering method described in the manual.
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