The Endevco 4416B is a portable, battery-powered signal conditioner engineered for Isotron® (IEPE-type) transducers and piezoelectric transducers equipped with Remote Charge Converters (RCC). It delivers a constant current excitation source, low-noise signal amplification, and selectable gain settings—making it suited for field vibration measurement and condition monitoring where mobility and operational autonomy are essential.
## Technical Specifications
**Input Stage**
• Single-ended constant current two-wire configuration
• Input impedance: > 20 kΩ
• Excitation current: 4.7 mA ±20%
• Compliance voltage: > 20 V
**Output Stage**
• Single-ended output referenced to circuit ground
• Output impedance: < 10 Ω in series with minimum 40 μF
• Linear output voltage: ≥ 10 V peak-to-peak (≥ 3.535 V rms)
• Linear output current: ≥ 2.0 mA peak-to-peak
**Transfer Function**
• Gain: ×1 or ×10 selectable (4416BM1 variant without gain stage available)
• Gain accuracy: ±1.5% across temperature and time variations
• Frequency response within ±5%: 1 Hz to 20 kHz (normalized to 100 Hz)
• Lower cutoff: -3 dB maximum at 0.3 Hz; -5% at 1 Hz
• Connectors: BNC input and output (EJ21 adapter enables 10-32 cable connection)
**Power & Battery**
• Three onboard rechargeable nickel-cadmium batteries
• Minimum battery runtime: 8 hours continuous operation
• External 12 VDC supply: 160 mA minimum
• Recharge cycle: 3 hours minimum (unit off); 6 hours minimum (unit on)
• Unit operable during recharge cycle
**Environmental**
• Operating temperature: 0°C to +50°C
• Storage temperature: -40°C to +50°C
• Recharge temperature: +15°C to +50°C
• Humidity rating: 95% R.H.
## Key Features
• Real-time transducer status indication via tri-state LED (green = normal; red = input short; off = open/removed/low battery)
• Compact, field-deployable architecture requiring no external laboratory infrastructure
• Dual-gain configuration for signal optimization across measurement ranges
• Extended battery life minimizes field recharge frequency
## Typical Applications
• Portable vibration analysis and machinery condition monitoring
• Field data acquisition from Isotron transducers in industrial environments
• Remote sensing applications where AC line power is unavailable
## Compatibility & Integration
Designed exclusively for Isotron® (IEPE) transducers and charge-output piezoelectric transducers paired with Remote Charge Converter modules.
