The SediMeter gets burst sampling at 20 Hz, long accelerometer recordings at 400 Hz, and a brand new sediment profiling functionality.
We are pleased to announce the following new features in the 4th generation SediMeters (firmware rev. 2 and software ver. 6):
- Burst sampling at 0.125 Hz to 20 Hz, up to 255 records per burst
- Up to 5k 3D-accelerometer samples at rates from 10 Hz to 400 Hz
- Vibration and free-fall triggered sampling
- New flexible modes
- No internal sampling
- Only timed internal sampling, with or without bursts
- Only triggered internal sampling, with or without bursts
- Both timed and triggered internal sampling
- Bursts in neither
- Bursts in both
- Bursts only in timed measurements
- Bursts only in triggered measurements
- The accelerometer can be set up using the free software
- Free-fall threshold and duration
- Vibration threshold and duration
- 10 bit/20 samples or 8 bit/30 samples per record
- ±2, ±4, ±8, or ±16 g range
- 1, 10, 25, 50, 100, 200, or 400 Hz rate
- Convenient presets for SediMeter™, SediSond™, and both
- Flexible choices for displaying OBS turbidity array data in the software
- A clean time series
- A single free-fall burst sample
- A single vibration burst sample
- More control over displaying the accelerometer data
- Record by record, or burst by burst
- Ability to listen to the accelerometer data in mono or stereo
- A new window for displaying interpreted SediSond™ free-fall data
- Acceleration, velocity and turbidity as a function of vertical position
All this is included in the SediMeter™ SM4 rev. 2 for both SM4 and SM4P instruments, but the SediSond™ mode is only usable in the SM4P due to the mechanical construction. Reference: Erlingsson, U., 2024: Electronic Sediment Profiler: SediSond™. http://dx.doi.org/10.13140/RG.2.2.36757.13284
