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12AL 1-Channel CCP Power Module with A-weighting filter
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12AL 1-Channel CCP Power Module with A-weighting filter
The GRAS 12AL CCP (Constant Current Power) Supply is a low-noise single-channel power supply for CCP transducers and preamplifiers.
The 12AL will supply a transducer with a constant current of 4 mA. It has a wide operating frequency range from about 1 Hz (depending on load impedance) to 200 kHz. It also has an A-weighting filter that can be switched in or out.
The 12AL can be powered by either two internal AA alkaline batteries or an external 3–6 VDC power source. Both the AA batteries and the AB0005 6 VDC power supply are included.
Key Specifications
| CONDITIONING | . |
| Frequency response (±3.0 dB) (with 10 kΩ load) | 0.7 Hz to 200 kHz |
| Frequency response (±3.0 dB) (with 100 kΩ load) | 0.07 Hz to 200 kHz |
| Output channel(s) | 1 |
| Output impedance, with A-weighting | 100 in serial with 22µF Ω |
| Output impedance, without A-weighting | As source in serial with 22µF Ω |
| Direct coupling input to output | No |
| Inherent noise, A-filter "on" and with dummy microphone (20 Hz to 20 kHz), | 15 µVrms |
| Inherent noise, A-filter "off" and with dummy microphone (20 Hz to 20 kHz), | 4 µVrms |
| A-weighting filter according to | IEC 61651 Type 0 |
| Linear mode | Yes |
| Type | Constant Current Power (CCP) |
| Input channel, CCP | 1 |
| Input channel(s), traditional power supply | 1 |
| CCP preamplifier supply @ +28 V | 4 mA |
| Overload indication | Yes |
| PC controlable | No |
| External filter option | No |
| Power amplifier overload detection | No |
| POWER SUPPLY | . |
| Power supply, battery | 2 x LR6 (AA) |
| Power supply, external | 3 to 6 Vdc |
| Power consumption | 50 to 120 mA |
| Battery life | 24 h |
| Battery low indication | Yes |
| Temperature range, operation | -10 to +50 °C / 14 to 122 °F |
| Weight | 110.00 g / 3.88 oz |
| Weight with batteries | 160 g / 5,6 oz |
Specifications from the official GRAS product sheet. Please refer to the attached datasheet for full details.
