Overview
SIT_QV1501 is a single channel charge amplifier. SIT_QV2504 is a four channel charge amplifier. They are low-noise charge amplifiers whose output voltage is proportional to the input charge. They are used in conjunction with piezoelectric accelerometers and other piezoelectric sensors to measure mechanical quantities such as vibration, impact, and dynamic force. They are widely used in machinery, power, mining, transportation, construction, water conservancy, aviation, aerospace, weapons, chemical explosives, and other sectors. They have high precision performance and are therefore also suitable for accelerometer calibration.
They have the following characteristics:
*Low noise, high stability
*The normalization coefficient is fixed
*Adjustable range of high and low-pass filters
*Output overload indication function
*Adjustable output gain
*BNC input/output, convenient for connecting various instruments
Parameters of SIT_QV1501
| Supply voltage: |
DC (18~24) V |
| Power supply current: |
≥ 100mA |
| Input connection method: |
BNC female socket |
| Input signal range: |
≤ ± 10⁶ pC |
| Input impedance: |
1TΩ |
| Input frequency response range: |
10Hz~2kHz (0dB, ≤± 10⁶ pC) |
| 10Hz~30kHz(0dB, ≤+10⁵ pC) |
| 10Hz~60kHz(0dB，≤+10⁴ pC) |
| Charge sensitivity: |
100pC/mV |
| Output connection method: |
BNC |
| Output signal range: |
≤±10V |
| Output impedance: |
100Ω |
| Output gain: |
x1, x1.1, x5, x10 (default) Optional
|
| Output bias voltage: |
≤± 1mV |
| Output accuracy: |
≤± 0.5% |
| Noise: |
≤ 20mV (maximum gain) |
| Operating temperature: |
0℃~40℃ |
| Storage temperature: |
-55℃~85℃ |
| Humidity: |
80% R.H |
| Dimensions: |
117mm (L) * 46.2mm (W) * 29.6mm (H) |
| Weight: |
120g |
Parameters of SIT_QV2504
| Channels |
4 channels |
| Input Signal Type |
Voltage/Charge (toggle switch selection, default charge level) |
| Maximum input charge quantity |
±10⁶pC |
| Charge conversion sensitivity |
1mV/pC (charge amplification stage source capacitor 1nF) |
| Maximum output amplitude |
±10VP |
| Maximum output current |
±10mA |
| Maximum output impedance |
125Ω |
| Output gain level |
Adjustable in three levels: 0.1, 1.0, and 10 |
| Accuracy |
For three levels of 0.1, 1.0, and 10, when the equivalent capacitance of the input cable is<10nF, 68nF, and 22nF, respectively, under 1kHz reference conditions, it is<± 2% |
| Harmonic distortion |
Frequency<30kHz, capacitive load<47nF,<1% at full output |
| Noise |
<40mV (highest gain level converted to input) |
| Overload indication |
When the output peak exceeds ± 11Vp, the LED lights up |
Filter and frequency response
| High pass filter (HPF) |
| Lower limit frequency (Hz) |
5 levels :1. 3, 10, 30, 100 |
| Allowable deviation |
-3dB±1dB |
| Attenuation slope |
-6dB/cot |
| Low pass filter (LPF) |
| Upper limit frequency (kHz) |
5 levels :1. 3, 10, 30, 100 |
| Allowable deviation |
-3dB±1dB |
| Attenuation slope |
-12dB/oct |
External power supply
| Input Voltage |
18V~24V DC (typical value 24VDC) |
| Overcurrent protection |
1A |
| Overvoltage protection |
28V |
| Other Protection |
Anti reverse connection |
