Trig-Tek Inc. 203M Charge Amplifier

Input

Connector: BNC 

Charge Sensitivity: 1 to 110 mV or pC/g (two selectable ranges “1-11” and “10-110” with continuous adjustment) 

Frequency Response: ±3% from 5 Hz to 30,000 Hz (referenced to 100 Hz) 

Overload Recovery: Input pulses ≤ 10,000 pC, 1 ms half-sine — no effect on output except clipping 

Amplitude stability vs input capacitance: < 0.1% change per 1000 pF 

Amplitude stability vs temperature: < 3% change from 30° to 130° F 

Shunt Resistance: operates with any input impedance above 100 kΩ 

Filtering: 12 dB/oct roll-off; selectable low-pass filter cutoffs at 3 kHz, 10 kHz, or 30 kHz (other cutoffs available on request) 

Acceleration Output (NOR and AUX)

Voltage (Max): 10 Vrms 

Sensitivity: 10 mV/g or 100 mV/g 

Output Impedance: < 50 Ω (max 10 mA)  

Amplitude Linearity: ±1% of best straight-line approximation (output vs input amplitude) 

Amplitude Accuracy: ±2% of reading ±1% full scale (when used with selected low-pass filter) 

Noise: 0.05 pC max with 1.0 pC/g sensitivity; increases by 0.007 g per 1000 pF added input capacitance 

Harmonic Distortion: < 1% 

DC Offset: < 5 mV 

Velocity Output

Voltage (Max): 10 Vrms 

Sensitivity: 10 mV/ips 

Impedance: < 50 Ω (max 10 mA) 

Frequency Response: ±3% from 5 Hz to 30,000 Hz (with –6 dB/oct slope), in series with selected input low-pass filter 

Dynamic Range: 46 dB below full scale 

DC Offset: < 5 mV 

Displacement Output

Output Level: 0 to 10 Vrms 

Impedance: < 50 Ω (max 20 mA) 

Sensitivity: 10 mV/mil DA 

Amplitude Accuracy: ±5% of reading ±0.5% full scale 

Frequency Response: ±3% from 10 Hz to 10,000 Hz with –12 dB/oct slope; or ±5% from 5 Hz to 3000 Hz with –12 dB/oct slope (with selected low-pass filter) 

Dynamic Range: 36 dB below full scale 

DC Offset: < 5 mV (note: noise signal should be averaged) 

DC Output (meter range)

Level: 10 VDC full scale 

Impedance: < 50 Ω (max 10 mA) 

Sensitivity: 10 V for selected full scale 

Linearity: 1% full scale 

Amplitude Accuracy: 2% of reading ±1% full scale 

Dynamic Range (Accel): 60 dB below full scale 

Interface / Power

Power: 115 or 230 V AC, ±10%, 50 to 400 Hz, nominal 3 W 

Controls (on front panel)

Filter Switch: selects “Lo”, “Med”, “Hi” low-pass filter (cutoff frequencies 3 kHz, 10 kHz, 30 kHz) 

Cal-Oper Switch: connects amplifier input to either internal calibrator signal or normal accel input 

mV/g Output Switch: selects 10 or 100 mV/g output 

pC/g – mV/g Switch: selects input type (pC/g for standard accelerometers, mV/g for those with built-in electronics) 

Sensitivity Switch: selects “1-11” or “10-110” mV/g or pC/g 

Sensitivity Dial: adjusts charge sensitivity continuously 1 to 11 for each range 

Units Switch: selects meter units (g’s, ips, or MILS) 

Full Scale (FS) Switch: selects 10, 100, or 1000 units as full scale for meter 

RMS-Peak Switch: scales front-panel DVM for either peak or RMS units at input 

Alarm Set Switch: monitor/reset alarm set point 

SE-DIFF Switch: selects single-ended or differential input configuration 

Read-Hold Switch: “Read” locks Pk-Hold circuit value to meter; “Erase” resets Pk-Hold to zero 

Indicators

Cal Light: illuminates when “Cal” mode selected 

Alarm Light: illuminates when alarm set point exceeded 

Mechanical

Dimensions: 7" H × 2.7" W × 13" D (17.8 cm × 6.9 cm × 33 cm) 

Up to six units side-by-side in a standard 19" rack

Datasheet