The universal borehole system MAGNETO® BM2 can be used with various SENSYS borehole probes e.g. 3axis, DISTLOG and vertical gradiometer. By using the integrated extension port, additional equipment like the SENSYS KWE (cable length counter) can be connected to the system.
The borehole box is connected via Bluetooth to an PDA which serves for planning and surveying.
The borehole box as well as the systems power supply, which consists of a 12V battery, are placed in a special carrying belt.
When being used with the 3-axis sensor probe, this system is the perfect solution for standard and special tasks due to the fact that the measured values from two triaxial sensors and one acceleration sensor are stored separately. These values can thus be evaluated for each project in MAGNETO either individually or as gradients.
Special systems features such as calibration for noise reduction, measurement range of +/-250µT and data acquisition at 200Hz allow for surveys closed to steel pilings or in urban areas as well as diagonal or horizontal measurements.
|General Technical Data|
|Power Supply/Current Consumption||12 V / approx. 390 mA (Led Gel Battery 12V 7Ah)|
|Weight without/with transport case||t.b.d.|
|Digitalization / Data Acquisition||24 Bit / 200 Hz|
|Connectors||1x analogue, 1x 3axis, 1x power supply,|
1x extension port, 1x Bluetooth
|User device||Windows Mobile Rugged Bluetooth PDA|
|Functions||Planning / Surveying / Data Storage / Data Export|
|Dynamic Range (per sensor and axis)||±250,000 nT||±75,000 nT||±75,000 nT|
|Measurement Range (per sensor and axis)||±250,000 nT||±10,000 nT||±10,000 nT|
|Sensor Separation||582 mm||650 mm||650 mm|
|Reference Point2||114 mm / 696 mm||393 mm /4 mm3||393 mm /4 mm3|
|Declination||<14 nT||±5 nT||±5 nT|
|Resolution||30 pT||<0.2 nT||<0.2 nT|
|Noise @ 1Hz per axis||<20 pTrms/√Hz||<40 pT rms /√Hz||<40 pT rms /√Hz|
|Cut off frequency||100 Hz (DC … 100Hz)||20 Hz (DC…20 Hz)||20 Hz (DC…20 Hz)|
|Temperature Drift||<0.3 nT/K||<0.3 nT/K||<0.3 nT/K|
|Relative error of measurement||20nT||1%5||1%5|
|Stability||<5 nT per axis||<1 nT||<1 nT|
|Borehole Length Measurement||Integrated acceleration sensor||none|
|Scope of Delivery|
|Borehole Probe||FGM3AS and/or DISTLOG and/or FGM650/10|
|Borehole Cable||25m (FGM3AS) and/or 15m (DISTLOG and/or FGM650/10)|
|Data Acquisition||Borehole Box + PDA (incl. accessories)|
|Power Supply||Carrying belt with 2x 12V Lead-Gel Battery and 1x Battery Charger|
|Borehole Weight||1x brass weight with M8 thread|
|Transport Case||1220 x 435 x 165mm including handles and wheels of casing|