GRAS 12AN 4-Channel Power Module
Connection: Traditional 200 V
Channel(s): 4
GRAS 12AN 4 通道电源模块是一个四通道电源模块，配有 7 针 LEMO 1 B 接头，用于外部极化测量传声器组。输入通过交流耦合直接连接到输出，可实现低至 0.05 Hz 的平坦频率响应。它具有为电容式测量传声器供电的基本功能。外部极化传声器的极化电压可选为 200 V，预极化传声器的极化电压可选为 0 V。前置放大器的电源电压为 ±15 V。
Technology
典型应用
The special features of the 12AN Power Module make it suitable for general use.
The 12AN Power Module is for general use in acoustic measurements both in the laboratory and in the field. If you are looking for a cost-effective solution or a multi-channel power module with direct coupling (no filters) to the output, the 12AN Power Module is a logical choice.
The input signal is coupled to the output without any filtering or A-weighting network.
Because of this, the 12AN Power Module is ideally suited for infra-sound measurements. The low-frequency cut-off at 0.05 Hz is so low that it will not be the limiting factor in infra-sound measurements. A suitable microphone system for this application is the combination of the GRAS 40AN 1/2" Free-field microphone, low frequencies, and the matching preamplifier, the GRAS 26HG 1/4" Preamplifier, High Impedance.
The polarization voltage is very stable and the sensitivity of the microphone is therefore kept very stable. For this reason, the 12AN Power Module is well suited for microphone calibration.
The 12AN Power Module has four channels for multi-channel measurements and calibration setups requiring more than one channel. You can operate the 12AN Power Module on batteries or an external DC power supply. A battery indicator monitors the battery condition.
兼容性
The 12AN Power Module can be used with all standard, externally polarized microphone sets and standard frontends or data acquisition units.
However, when setting up a measurement chain with the 12AN Power Module, you need to ensure proper matching of the components so that signal levels and cable lengths do not interfere with the validity of your measurements.
质量与保修
The 12AN Power Module is built into a sturdy, anodized aluminum case and built to high-quality standards which enables GRAS to offer 2 years warranty against defective materials and workmanship.
服务
Before leaving the factory, all GRAS products are tested. Should a power module become defective, it can be sent to GRAS for repair.
Specifications
GRAS Sound & Vibration 保留更改规格和配件的权利，恕不另行通知。
Ordering info
标配
标配一个电源适配器: | (根据订单所在国而定) |
GRAS AB0002 | Power supply 230 VAC to 15 VDC. EU-connector |
GRAS AB0006 | Power supply 230 VAC to 15 VDC. UK-connector |
GRAS AB0003 | Power supply 120 VAC to 15 VDC. USA-connector |
带 7 针 LEMO 接头的延长线缆
3 m | |
10 m | |
GRAS AA0012 | 30 m |
GRAS AA0014 | 100 m |
GRAS AA0020-XX | Custom, XX length in metres |
带 BNC 接头的延长线缆
GRAS AA0034 | 2 m |
| GRAS AA0035 | 3 m |
GRAS AA0036 | 5 m |
| GRAS AA0037 | 10 m |
GRAS AA0038 | 30 m |
GRAS AA0039-XX | Custom, XX length inmetres |
GRAS Sound & Vibration 保留更改规格和配件的权利，恕不另行通知。
