美国JH Technologies
JH Technologies 是一家大型全国性光学和显微镜公司，在光学和数字成像、金相学和计量学领域拥有超过 35 ……...
Low-Cost Charge Amplifier for Piezoelectric Transducers
The Model 4601 Charge Amplifier from Columbia is an affordable, high-Performance instrument that has been specifically developed for general purpose use with piezoelectric transducers for the measurement of force, accelerationand dynamic pressure.
Model 4601 attributes low noise, broad bandwidth, low output offsetand a gain control directly calibrated in transducer sensitivity for a simple setup.
Specifications
Input
Table 1. Source: Columbia Research Laboratories
| . | . |
|---|---|
| Connection | Microdot 50 series coaxial connector |
| Type | Single-ended, one side connected to circuit ground |
| Minimum Source Impedance | 50 megohms |
| Maximum Input Capacitance | 30,000 pF |
| Maximum charge input | 5,000 pcmb. on two most sensitive ranges,50,000 pcmb on remaining ranges |
Scope/Tape Output
Table 2. Source: Columbia Research Laboratories
| . | . |
|---|---|
| Connection | BNC connector |
| Type | Single-ended, one side connected to circuit ground |
| Output Impedance | 10 ohms maximum |
| D.C. Offset Voltage | 20 mV maximum |
| Full-scale Output Level | 10 V peak-to-peak (+/- 5 V) |
| Maximum Output Voltage | 20 V peak-to-peak minimum (+/- 10 V) |
| Maximum Output Current | 10 mA maximum |
| Frequency Response | +/- 5% from 2 Hz to 20 kHz |
| Maximum Gain | 500 mV/pcmb on most sensitive range, with Transducer Sensitivity control set to 1.00 |
| Gain Accuracy | +/- 2% |
| Gain Ranges | 1, 3, 10, 30, 100 and 300 g (or psi) full-scale with transducer sensitivity of 10 – 100 pcmb per g (or psi); and10, 30, 100, 300, 1000 and 3000 g (or psi) with transducer sensitivity of 1 – 10 pcmb per g (or psi) |
| Residual Noise | Less than 5 mV RMS plus 3 mV RMS per 1000 pF of source capacitance |
| Harmonic Distortion | 1% maximum |
Variable Output
Table 3. Source: Columbia Research Laboratories
Same as Scope/Tape Output, except:
| . | . |
|---|---|
| Gain Adjustment | Adjustable from 0% to 105% of Tape/Scope Output |
Indicators and Controls
Table 4. Source: Columbia Research Laboratories
| . | . |
|---|---|
| Meter | 2-1/2” jewelled movement |
| Meter Reading Accuracy | +/- 4% of full scale |
| ON/OFF switch | Integral with power entry module on rear panel |
| Power indicator | LED indicates power on |
| Overload indicator | LED indicator lights on 150% of full scale output |
| Transducer Sensitivity Control | 10-turn potentiometer with calibrated dial |
| Range Switch | 6- position rotary switch |
| Variable Output Adjustment | 10-turn screwdriver adjustment |
General
Table 5. Source: Columbia Research Laboratories
| . | . |
|---|---|
| Operating Temperature Range | +40F to +125F |
| Power Requirements | 105 – 125 VAC, 50-60 Hz, 15 W(220 VAC available on request) |
| Power Connection | Power entry module with integral ON/OFF switch and EMI filter and removable line cord |
| Dimensions | 5.5”H x 7” W x 10” D |
| Options | Case with integral handleCustom low-pass filter settings(consult factory for price and availability) |
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