Overview
The document provides detailed specifications and features of the AC-23, AC-22, and AC-21 accelerometers, designed for strong motion and industrial applications requiring high sensitivity. These accelerometers are part of the AC-2x series, which are servo-accelerometers based on a geophone mass-spring system with electronic feedback, offering excellent temperature and aging stability.

Specifications

• Full Scale Range: Jumper selectable ranges of ±0.1, ±0.2, ±0.5, ±1, ±2, and 4g, with the NPP version available in 0.5g, 1g, and 2g.
• Bandwidth: 0.1 Hz to 100 Hz, with an optional extension to 200 Hz.
• Dynamic Range: Greater than 140 dB.
• Non-linearity: 0.1%.
• Accuracy: ±0.4 dB max over the bandwidth.
• Cross Axis Sensitivity: 1%.
• Power Supply: 12 VDC regulated, with a consumption of 26 mA typical and 140 mA max at 15 VDC.
• Housing: Cast aluminium with dimensions of 195 x 112 x 95 mm, offering IP65 protection, with optional IP68.
• Temperature Range: Operating range from -20 to 70°C, non-operating range from -40 to 90°C.

Features

• Triaxial, biaxial, and uniaxial configurations available.
• Single bolt mounted enclosure with up to ±10° of levelling adjustment.
• Integrated bubble level for easy installation.
• Compatible with GeoSIG recorders.

Applications
The accelerometers are suitable for strong motion earthquake surveys and industrial applications requiring high sensitivity. They offer different housing and mounting options, including floor or wall mounting.

Options
Various options are available, including cable and connector types, housing materials, and mounting configurations. Users can specify the type of AC-2x, full scale range, and other applicable options when ordering.