Vibration calibrator 8921B series

accelerationfor accelerometersfor mobile reference measurement

Summary
Portable, battery-powered accelerometer calibrators of Type 8921B are designed to verify and calibrate accelerometer sensitivity in field and laboratory environments. The unit provides an accurate, controlled vibration level with closed-loop amplitude control and either a constant (8921B01) or selectable (8921B02) precise frequency.

Main features / advantages

• Integrity check of the measurement system
• Self-contained, portable reference shaker for on-site and laboratory use
• Rechargeable battery operation (approx. 5 hours per charge)
• Automatic shut-off to conserve battery
• Supports test articles up to 600 g (approx. 1.3 lbs)
• Calibration traceable to national standard

Variants

• 8921B01 — Reference shaker with fixed (constant) frequency and fixed amplitude; closed-loop control maintains constant amplitude regardless of test mass.
• 8921B02 — Reference shaker with selectable frequency and selectable amplitude; closed-loop control maintains selected amplitude regardless of test mass.

Operation and safety
The internal control and excitation system supplies a precise frequency (constant for 8921B01 or selectable for 8921B02). Closed-loop amplitude control keeps the output stable independent of the mass of the test article. The unit provides audible and visual warnings if the test article exceeds the shaker capacity. Rechargeable battery operation enables field use; automatic shut-off preserves battery life.

Technical specifications

• Brand: Kistler
• Model / designation: 8921B (variants: 8921B01, 8921B02)
• Output control: Closed-loop amplitude control
• Frequency: Constant (8921B01) or selectable (8921B02)
• Amplitude: Constant (8921B01) or selectable (8921B02)
• Maximum test article mass: up to 600 g (approx. 1.3 lbs)
• Power: Self-contained rechargeable battery, approx. 5 hours runtime per charge
• Warnings: Audible and visual overload indication
• Traceability: Calibration traceable to national standard
• Portability: Compact, battery-powered for field and laboratory use