Model 2113F / 2114F

3-Channel PE / IEPE Signal Conditioner Amplifier

Vibracon / Bouche Labs
720 North Ventura Road
STE 4
Port Hueneme, CA 93041

The Model 2113F/2114F is a new microprocessor controlled 3-Channel Signal Conditioner for Piezoelectric (PE) or Integrated Electronic Piezoelectric (IEPE) sensors. The Model 2113F/2114F incorporates a charge amplifier when used with PE sensors. An integral 4 or 10mA, user selectable, current source with 20Vdc compliance voltage is utilized with IEPE sensors. A user friendly interface allows programming Input Sensitivity and Output Sensitivity, then allowing the instrument to calculate amplifier gain. All gain selections are stored in non-volatile memory and reinitialized when power is applied. Gain can also be entered directly if desired.

The Model 2113F/2114F utilizes a microprocessor SLEEP mode to eliminate high frequency clock noise and their associated harmonics. The microprocessor WAKES momentarily to acknowledge front panel switch depressions, then goes to SLEEP immediately after processing and executing the requested function. This allows the amplifier to operate with minimum self-generated noise and provides clean, clock free amplified signals. The Model 2113F/2114F also uses low noise linear voltage regulators instead of switching regulators to minimize interference.

The Model 2113F/2114F uses 12 bit DACs, for each channel, to set amplifier gains from 0.00 to 999.9 with 0.5% precision. Amplifier gains can be changed "on the fly" without damage to the instrument.

The Model 2113F/2114F provides 0.5Hz to 100kHz broadband frequency response, with an optional plug-in, 4-pole Butterworth high pass and low pass filter modules available. Filter selection is provided via front panel switches. Front panel annunciators LEDs display filter selections. Each channel can drive 10mA into a 1k ohm load.

The Model 2113F/2114F channel-to-channel signal ground is non-isolated. However, signal ground is isolated from power ground. An internal DIP switch allows shorting signal ground to power ground.

A rear panel voltage selector switch allows selection of 100, 115 or 230 Vac, 50 - 60Hz, input power. The Model 2113F/2114F is designed for CE compliance for EMC emissions and immunity and for Product Safety. The Model 2113F/2114F is directly compatible with all manufacturers PE and IEPE transducers.

Input Specifications (per channel)

Piezoelectric
Maximum Charge Input: 30,000 pC
Source Resistance: >10 Megohms Source Capacitance < 30,000 pF

IEPE
Constant Current Source: Single-ended with low side connected to signal ground
Accuracy: None, 4mA or 10mA selectable per channel
±15%
Compliance Voltage: <22 Vdc
Maximum Input Voltage: <22 Volts (AC +DC)
Input Impedance: 10µF

Output Specifications (per channel)

AC Voltage
Single-ended and referenced to signal ground. Signal proportional to input
Linear Output: 10V peak minimum
Output Current: 10 mA max
DC Offset: 15mV typ
Protection: Short circuit protected

Transfer Characteristics

Gain
0.00 to 999.9

Range
0.0025, 0<= Gain < 10
0.025, 10<= Gain < 100
0.25, 100<= Gain < 1000

Resolution
±0.2% at 1kHz with filters disabled and gain >1
0.00 to 9999

Accuracy
Sensitivity (pC/EU or mV/EU): 0.00 to 9999

Resolution
Output Scaling (mV/EU): determined by gain resolution
0.00 to 9999

Resolution
determined by gain resolution
0.1% of Full Scale, best fit straight line at 1kHz reference with standard 10kHz 4-pole Butterworth low pass filter

Linearity
Noise: installed
Piezoelectric: 1.2 pC rms+0.006pC rms per 1000pF of source capacitance RTI +1mV rms RTO.

IEPE
20uV rms RTI + 400 uV rms RTO. Input shunted with a 249 Ohm (4mA exc) or 1000Ohm (10mA exc) load

Broadband Frequency Response
±3%, 1Hz to 50kHz, referenced to 1kHz, -3dB at 0.5Hz to 100kHz

Optional Plug-In Filter Characteristics
High Pass Type: 4-pole Butterworth
Low Pass Type: 4-pole Butterworth
Corner Frequency (-3dB): 10Hz ± 5% and 10kHz ±12% typ, other corner frequencies available
Crosstalk between channels: 80dB RTI min

Rear Panel Selectable Functions (per channel)

Input Type
Charge or IEPE

Excitation Current (IEPE only)
4mA or 10mA

Filter
HP (High Pass) and LP (Low Pass)

Front Panel Programmable Functions (per channel)

Sensitivity (pC/EU or mV/EU)
0.01 to 99.99
100.0 to 999.9
1000 to 9999

Output Scaling (mV/EU)
0.01 to 99.99
100.0 to 999.9
1000 to 9999

Gain (calculated)
0.00 to 999.9

Gain (front panel settable)
0.00 to 999.9

Memory
Serial EEPROM (1K bits)

Power Requirements

Voltage
100/115/230 VAC rear panel switch selectable, 60 Hz

Power Dissipation
2.5 VA (typ)

Isolation
No isolation channel to channel. Signal ground isolated from case ground. Internal DIP switch allows connecting signal ground to case ground.

Physical Characteristics

Dimensions
5.57" x 2.50" x 10" estimated (10" depth may change)

Weight
3.6lbs (1.6kg)

Case Material
Iridited aluminum