• Laboratory or field vibration measurements
• Industrial turbines
• Power generators and gas pumping systems
• Paper mills

• Portable vibration meter indicating peak-to-peak displacement and average velocity
• Six selectable inputs
• Optional AC or DC power
• Three internal test circuits

The CEC 1-157 Vibration Meter is a portable unit designed for use with self-generating type velocity transducers. It displays peak-to-peak displacement and average velocity based on equivalent sinusoidal input. The device can operate on AC or battery power, with a power pack module located at the rear. It includes internal test circuits for calibration, battery testing, and continuity checks of vibration transducers. Each of the six channels has its own sensitivity adjustment.

• Frequency: 5 to 2,000 Hz (displacement), 5 to 20,000 Hz (velocity)
• Displacement: 0.0005 to 0.500 inch peak-to-peak full scale
• Velocity: 0.050 to 50 in/sec average full scale
• Sensitivity Adjustment: ±1%
• Linearity: ±2%
• Range Switch: ±1%
• Frequency Response: ±2%
• Noise Level: 2% of full scale
• Input Impedance: 10 KΩ ±5%
• Scope Output: 894 mV peak-to-peak, ±20% (full scale)
• Galvo Output: 785 µA peak ±3% (full scale)
• External Meter Output: 500 µA ±3% (full scale)
• Battery Check: ±0.15 volts
• Continuity Test: ±20%
• Basic Sensitivity at 25°C: 47 mV/in/sec ±0.25%
• Oscillator Frequency: 50 Hz ±1%
• Oscillator Stability: ±0.5%

• Power Input Voltage: 90-140/180-260 VAC at 50 to 400 Hz or two 9V batteries in series
• Power Drain: 1 VA for AC power

• Transducer Sensitivity: 50 to 150 mV/in/sec
• Adjustment Range: Six channels for velocity vibration transducers

• Scope (AC High Impedance Jack): 500,000 Ω min
• Galvo (AC Low Impedance Jack): 100 Ω max
• Ext. Meter (DC Low Impedance Jack): 200 Ω max

• Operating Temperature: +32°F to +122°F (0°C to +50°C)
• Storage Temperature: -22°F to +166°F (-30°C to +71°C)

• Operation and Maintenance Manual
• Input Signal Connectors: 6 each XLR-3-11C (CEC P/N 8792)

• Filters: High Pass, Low Pass, and Bandpass filters available on special request
• AC Power Supply: P/N 159300-0100
• Battery Power Supply: P/N 159322-0100

Specify 1-157-0001 for AC operation; 1-157-0002 for DC operation. Units are shipped with power supply installed. For spare or alternate power supplies, specify P/N 159300-0100 (AC) or P/N 159322-0100 (DC). Consult your CEC sales representative for confirmation and delivery information. Specifications may change without notice.