LLAC4
LLAC4
Orderable4-Channel Low-Level AC-Conversion Module
Overview
The LLAC4 is a small peripheral that you can use to increase the number of low-level ac signals that your data logger can monitor. The LLAC4 is often used to measure up to four anemometers, and it is especially useful for wind profiling applications.
Key Advantages
Increases number of signals data logger can monitor
Technical Description
The LLAC4 enables four data logger control ports to emulate pulse-counting channels by converting the low-level ac signals to logic levels read by the control ports. To use the LLAC4, the data logger control ports must accept high frequency pulses. The LLAC4 typically measures anemometers but can measure other sensors that output pulse counting signals.
Minimum AC Input Voltage versus Output Square Wave Frequency
| Input Sine Wave (mV RMS) |
Output Range (Hz) |
| 20 | 1.0 to 20 |
| 200 | 0.5 to 200 |
| 2000 | 0.3 to 10,000 |
| 5000 | 0.3 to 20,000 |
Benefits
- Ideal for applications that require high numbers of pulse channels, but fewer control ports, such as in wind prospecting
Specifications
- Function
- Increases the number of low-level ac signals that a data logger can monitor.
- Operational Temperature
- -40° to +85°C
- 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
- 5.4 x 8.0 x 2.5 cm
(2.1 x 3.1 x 1.0 in.) without base mounting flanges
5.4 x 11.2 x 2.5 cm(2.1 x 4.5 x 1.0 in.) with base mounting flanges
- Weight
- 92 g
(3.2 oz)
Accessories
(1)Replacement Parts
(3)17529
Cable, LLAC4 to Datalogger
This replacement cable has a two-foot length. It connects the LLAC4 to the datalogger. The wires are color-coded to assist wiring connections. One cable ships out with the initial purchase of the LLAC4.
Orderable6044
Grommet for #6 or #8 Screw
These grommets are commonly used with the 505 screws to secure our equipment to the backplates of our enclosures.
Orderable505
Screw #6-32 x .375 Pan Phillips
These screws, along with the 6044 grommets, are commonly used together to secure our equipment to the backplates of our enclosures.
Orderable
Compatibility
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.
Compatible Products
(9)CR6
High-Capacity Data Acquisition System
OrderableNotes—CR310
Measurement and Control Datalogger
OrderableNotes—#40C
Maximum Wind Speed Sensor
OrderableNotes—03101
Wind Sentry Anemometer
Limited availabilityNotes—03002
Wind Sentry Set
OrderableNotes—05103
Wind Monitor
OrderableNotes—05305
RM Young Wind Monitor AQ
OrderableNotes—CR350
Measurement and Control Datalogger
OrderableNotes—CR1000Xe
Measurement and Control Datalogger
OrderableNotes—
