| Input Characteristics |
Accelerometer Input
- Connection: Single-ended or differential input
- Accelerometer Sensitivity: Variable 1 to 11 and
10 to 110 pC/g
- Source Resistance: Input restricted to
capacitive devices with not less 100 kohms between signal leads
and 1 Mohm between either signal lead and ground. Under certain
conditions the amplifier will operate with as low as 10 kohm
source resistance.
- Source Capacitance: 20, 000 pF maximum between
signal leads and also between either lead and ground
Velocity Transducer Input
- Transducer Sensitivity: Variable 10 to 110 and
100 to 1100 mV/in./s or greater
- Input Resistance: 10 kohms typical (Both sides
insulated from ground)
- Source Capacitance: 30,000 pF maximum
- Overload Recovery Time: Negligible for up to
100,000 pC peak input from an accelerometer
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| Physical |
- Dimensions: 2.71" W x 4.88" H x
17.13" D (6.9 x 12.5 x 43.8 cm)
- Weight: 4.5 lbs (2.0 kg)
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Vibration Amplifier
The Endevco 6634A/6634AT Vibration Amplifier is an extremely versatile
instrument for measuring, monitoring, and analyzing the vibration of jet
engines, generators, machinery, turbines, pumps.
Designed to be used with the Endevco Model 4948
Rack.
Note: The 6634AT adds an additional BNC input
connector.
| Output Characteristics |
- Connections: Single-ended with one side
connected to circuit ground
Linear Output Voltage
- Broadband Output: ±5.0 V pk min., 10 V pk
typical
- Selected Outputs: ±1.0 V pk full scale, linear
to ±5 V pk at 1 mA max.
- DC Output: ±1.0 V dc full scale, linear to ±5
V dc at 1 mA max.
- Galvanometer (optional): Adjustable to 6 V pk,
10 to 5000 Hz, decreasing at 6 dB per octave above 5000 Hz.
Current linear to 85 mA pk, limited at 100 mA pk for loads of 10
ohm or more.
Output Impedance
- AC Outputs: 25 ohm max. in series with 11 µf
- DC Output: 10 ohm max.
- Galvanometer Output (optional): 1 ohm max.
- Overload Recovery Time: Negligible for up to
100,000 pC peak input from an accelerometer
Transfer Characteristics
- Acceleration Range: 5, 15, 150 g pk, with
accelerometer input
- Velocity Range: 1.5, 5, 15 in./s pk
- Displacement Range: 5, 15, 150, mil pk-to-pk
(double amplitude)
Frequency Response (Reference to 100 Hz)
Accelerometer Input
- Broadband Acceleration Output: ±2%, 10 Hz to
10 kHz, -8% max at 5 Hz
- Selected Unfiltered Accel. Output: ±3%, 10 Hz
to 10 kHz
- Selected Unfiltered Vel Output: ±4%, 20 Hz to
10 kHz
- Selected Unfiltered Displ. Output: ±5%, 20 Hz
to 1 kHz
Velocity Transducer Input
- Broadband Velocity Output: ±3%, 10 Hz to 5 kHz
- Selected Unfiltered Vel. Output: ±4%, 20 Hz to
10 kHz
- Selected Unfiltered Displ. Output: ±5%, 20 Hz
to 1 kHz
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