Trig-Tek Inc. 203G8-08 Charge Amplifier (60kHz/ 70kHz/ 80kHz (low); 20kHz/ 25kHz/ 30kHz (high))
Low Pass Filter:
+ Frequencies: 60kHz/ 70kHz/ 80kHz
+ Tolerance: -
High Pass Filter:
+ Frequencies: 20kHz/ 25kHz/ 30kHz
+ Tolerance: 5%
Input
Charge Sensitivity: 1 to 110 pC/g with two selectable ranges (1–11 and 10–110 pC/g) with continuous adjustment.
Frequency Response: ±2% from 5 Hz to 30,000 Hz referred to 100 Hz.
Overload Recovery: ≤15,000 pC, 1 ms half-sine input pulse causes no effect except clipping.
Amplitude Stability vs Input Capacity: <0.1% change per 1000 pF.
Amplitude Stability vs Temperature: <3% change from 30° to 130°F.
Shunt Resistance: Operates with input impedance above 100 kΩ.
Acceleration Output (NOR)
Voltage (max): 10 Vrms.
Sensitivity: 100 mVrms/Pk g.
Impedance: <50 Ω (10 mA max).
Amplitude Linearity: ±1% best straight-line approximation.
Amplitude Accuracy: ±2% of reading ±1% FS with selected low-pass filter.
Noise: 0.05 pC max with 1.0 pC/g sensitivity; increases 0.006 g/1000 pF added capacitance.
Harmonic Distortion: <1%.
DC Offset: <5 mV.
Velocity Output
Voltage (max): 10 Vrms.
Sensitivity: 354 mVrms/Pk ips.
Impedance: <50 Ω (10 mA max).
Amplitude Accuracy vs Frequency: ±3% from 25 Hz to 3000 Hz (–6 dB/oct) with LPF.
DC Offset: <5 mV.
Displacement Output
Level: 0–10 Vrms.
Sensitivity: 10 mVrms/mil Pk-Pk.
Impedance: <50 Ω (10 mA max).
Amplitude Accuracy (30–1000 Hz): ±4% (–12 dB/oct).
Amplitude Accuracy (25–3000 Hz): ±5% (–12 dB/oct) with LPF.
DC Offset: <5 mV.
FS AC Output (Tape Output)
Level: 0.5 to 1.5 Vrms for selected meter FS.
Impedance: <50 Ω (10 mA max).
Frequency Response: Acceleration: ±3%.; Velocity: ±4%.; Displacement: ±5%.
Linearity: ±1% FS.
DC Offset: <4 mV.
FS DC Output
Impedance: <50 Ω (10 mA max).
Sensitivity: 10 V for selected full-scale meter range.
Linearity: ±1% FS.
Amplitude Accuracy: Acceleration: ±2% reading ±1% FS.; Velocity: ±4% reading ±1% FS.; Displacement: ±5% reading ±1% FS.
Dynamic Range (Acceleration): 50 dB below FS.
Power: 115 or 203 Vrms, 50–400 Hz, 110 V nominal.
Controls:
Cal-Oper Switch: Selects Calibrate input or Accel input.
pC/g – mV/g Switch: Selects charge input or voltage input accelerometers.
Sensitivity Switch: Selects X1 or X10.
Sensitivity Dial: Adjusts 1–11 for selected range.
High-Pass Filter Switch: 20 Hz, 110 Hz, 300 Hz (48 dB/oct).
Low-Pass Filter Switch: 300 Hz, 2 kHz, 10 kHz (48 dB/oct).
Units Switch: Selects Pk g, Pk ips, or DA MILS.
FS Switch: Selects 1, 3, 10, 30, or 100 full-scale units.
Alarm Set Switch: Monitors or resets alarm.
SE-DIFF Switch: Selects Single-Ended or Differential input.
In-Out Filter Switch: Inserts LPF in series with input (pC/g mode only).
Indicators
Panel Meter: 3.5-digit reading of selected units.
OL Light: Overload indicator.
Cal Light: Indicates calibration mode.
Alarm Light: Indicates preset alarm exceeded.
Mechanical
Size: 7" H × 2.7" W × 13" D (17.8 × 6.9 × 33.0 cm).
Up to six modules fit into a 19" rack
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