增加了数据采集器可监测的交流脉冲信号的个数
概览
LLAC4 是一种小的外设，可增加数据采集器所能监测的低压交流脉冲信号的个数。LLAC4 经常用于测量多达4个风速计，风速剖面应用中特别有用。
优势与特点
- 适合要求大数目的脉冲通道，但更少数目的控制口的应用，例如在风能勘查中
图像
3D/CAD 文件：
技术说明
LLAC4 使得数据采集器的4个控制口模拟脉冲计数通道，通过将低压交流脉冲信号转换成高频方波信号，后者可被控制口所读取。
最小交流输入电压 相对 输出方波的频率。LLAC4主要用于风速计，也支持其它类型的脉冲传感器。
| 输入正弦波 (mV RMS) |
输出频率 (Hz) |
| 20 | 1.0 到 20 |
| 200 | 0.5 到 200 |
| 2000 | 0.3 到 10,000 |
| 5000 | 0.3 到 20,000 |
产品规格
| Function | Increases the number of low-level ac signals that a data logger can monitor. |
| Number of Channels | 4 |
| Power | 0.1 mA (@ 12 Vdc) |
| Input Hysteresis | 16 mV (@ 1 Hz) |
| AC Coupling Removal of DC Offset | ≤ ±0.5 V |
| Maximum AC Input Voltage | ±20 V |
| Cable Length | 0.6 m (2 ft) |
| Dimensions |
|
| Weight | 92 g (3.2 oz) |
兼容性
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
数据采集器
| Product | Compatible | Note |
|---|---|---|
| 21X (retired) | ||
| CR10 (retired) | ||
| CR1000X (retired) | ||
| CR1000Xe | ||
| CR10X (retired) | ||
| CR200X (retired) | To be compatible with the CR200X, the low-level ac signals must not exceed 1 kHz. | |
| CR206X (retired) | To be compatible with the CR206X, the low-level ac signals must not exceed 1 kHz. | |
| CR211X (retired) | To be compatible with the CR211X, the low-level ac signals must not exceed 1 kHz. | |
| CR216X (retired) | To be compatible with the CR216X, the low-level ac signals must not exceed 1 kHz. | |
| CR23X (retired) | ||
| CR295X (retired) | To be compatible with the CR295X, the low-level ac signals must not exceed 1 kHz. | |
| CR300 (retired) | ||
| CR3000 (retired) | ||
| CR310 | ||
| CR350 | ||
| CR500 (retired) | ||
| CR5000 (retired) | ||
| CR510 (retired) | ||
| CR6 | ||
| CR800 (retired) | ||
| CR850 (retired) | ||
| CR9000 (retired) |
传感器
| Product | Compatible | Note |
|---|---|---|
| 014A-L | ||
| 03002-L | ||
| 03101-L | ||
| 034B-L (retired) | ||
| 05103-45-L (retired) | ||
| 05103-L | ||
| 05106-L (retired) | ||
| 05305-L | ||
| #40C |
Additional Compatibility Information
Data Logger Considerations
The LLAC4 works only with data loggers whose control ports can accept high frequency pulses. The CR23X has four control ports that can be used (5, 6, 7, and 8); the CR200X-series control ports are compatible but are limited to inputs of 1 kHz.
Sensors
The LLAC4 typically measures anemometers. Compatible anemometers include the Wind Monitors, 03002 Wind Sentry Set, and 03101 Wind Sentry Anemometer. (The 014A Anemometer and 034B Windset are not compatible.) The LLAC4 can also measure other sensors that output pulse counting signals.
下载
LLAC4 Program Example (2 KB) 21-05-2024
Description: Includes two programs, one for a CR1000X and one for a CR350. Both programs measure three different wind speed sensors that produce low-level AC signals. The sensors used are the RM Young 05103 and RM Young 05305 propeller-type anemometers, as well as the RM Young 03101 cup anemometer.
常见问题解答
LLAC4: 1
-
No. But using a LLAC4 will convert the ac signal for up to four 03101-L sensors (and other ac output anemometers) to individual 0 to 5 Vdc TTL level square wave outputs. For more information, see the LLAC4 specification information.