This document is about the technical specifications of the 3145A2 and 3145A2G accelerometers, including dimensions, weight, material, mounting methods, etc.
This handbook provides detailed information for the Dytran 3145A2 and 3145A2G accelerometers. It includes suggested adhesive types, mounting torque, dimensions, material details, and connector specifications.
The document also lists performance parameters such as sensitivity, range, frequency response, resonant frequency, noise floor, and environmental limits, as well as electrical characteristics like supply voltage, output impedance, bias voltage, and grounding requirements.
| Weight | 2.3 g (3145A2) / 2.1 g (3145A2G) |
|---|---|
| Size (Hex x Height) | 0.281 in (9/32) × 0.49 in |
| Mounting Provision | 5‑40 integral stud / adhesive mount |
| Connector | 5‑44 coaxial, top‑mounted |
| Housing Material | 300 Series Stainless Steel |
| Element Style | Quartz planar shear |
| Sensitivity | 5.0 mV/G (±10 %) |
| Full‑Scale Range | ±1000 G for +5 V output |
| Frequency Range | 0.5 kHz – 10 kHz (±5 %) |
| Resonant Frequency | 45 kHz (nominal) |
| Noise Floor | 0.07 G RMS |
| Linearity | ±1 % of full scale |
| Maximum Vibration/Shock | 1000 G / 3000 G peak |
| Temperature Range | -60 °C to +300 °C |
| Supply Voltage / Current | 2 mA – 20 mA, +18 V to +30 V |
| Output Impedance | 100 Ω (typical) |
| Bias Voltage | +9 V (nominal, +8 V to +10 V) |
| Discharge Time Constant | 0.5 s (nominal) |
| Output Signal Polarity | Positive for acceleration toward top |
| Case Grounding | Case grounded to power ground |
The handbook recommends a cyanoacrylate "instant" bond for model 3145A2G.
Model 3145A2 should be torqued to 10 oz‑inches in place.
Drill a #38 hole to a minimum depth of 0.200 in, then tap 5‑40 to a minimum depth of 0.140 in.
The nominal resonant frequency is 45 kHz.