MODEL 176 DUAL CHANNEL CHARGE AMPLIFIER MODULE
Description
The Model 176 computer-controlled charge amplifier module features variable gain and output scaling and accepts either differential or single-ended inputs. Adjustable parameters include: accelerometer sensitivity, differential or single-ended mode, scaling, filter setting, external calibration and zero mode.
Specifications
| Accel sensitivity: | Any value from 2.0 to 200pC/g |
| Output scaling: | 1mV/g, 10mV/g, 20mV/g, 100mV/g |
| Gain accuracy: | ±1% |
| Input mode: | Differential or single-ended (-IN tied to common) |
| Maximum input: | 30,000pC per input; 60,000pC differential |
| Frequency response: | 80kHz at 0.7VRMS out without distortion; 9kHz at 7VRMS out without distortion |
| Filter: | Six-pole Butterworth highpass at 5Hz (always in), eight-pole Butterworth lowpass at 12kHz (may be bypassed) |
| External cal: | Cal voltage converted to charge by matched pair of 1000pf capacitors per channel |
| Offset: | Less than 5mVDC at output |
| Noise: | Less than 3mVRMS, filter in, input disconnected |
| Fault indication: | One green LED per channel turns red if amplifier output exceeds ±10V |
| Memory: | On-board EEProm stores serial number, calibration date, etc. |
| Mechanical: | 5.5” x 13.5” board, used with Model 5020-102 rack |