MREL MicroTrap - 3.8 Technical Specifications

MicroTrap™ Operations Manual - Edition 4.4
20
Number of Channels
1 channel for VOD. Upgradeable to provide an additional 4 channels for DC voltage recording of
other types of gauges.
Vertical Resolution
14 bits, 1 part in 16,384.
Recording Rate
User selectable by Software from 1 Hz to 2 MHz (VOD Only), 1 Hz to 1 MHz (Scope Channel
active).
Total Recording Time @
2 MHz Recording Rate
2.0 seconds (4 million data points). Reducing the Recording Rate increases the Total Recording
Time. Upgradeable to provide twice the amount of memory (8 million data points).
Pre-Trigger Time
User selectable by Software from 0-100% of the Total Recording Time.
Trigger Modes
User selectable by switch: Internal or External. External Mode: user selectable by Software “wire
make” or “wire break”. Internal Trigger Level: user selectable by Software from 2.4 to 98% of
signal level.
Power
Internal rechargeable Ni-Cad battery pack providing up to 12 hours of active operation when fully
charged. The non-volatile memory allows the data to be stored securely regardless of the status
of the internal battery pack. The Battery Charger is provided in 120 or 220 VAC configurations.
Recharging takes up to 10 hours. Operational from AC mains power through Battery Charger and
from external DC power.
Multiple Event Storage
User selectable by Software: up to 16 tests stored in permanent memory.
Components Provided
MicroTrap™ VOD/Data Recorder, Battery Charger, Communications Cables, BNC Adapters,
Padded Carrying Case, Operations Manual and DAS™ Data Acquisition Suite Software (32 or
64 bit) for Windows®.
Size and Weight
MicroTrap™ VOD/Data Recorder: 21 x 17 x 9 cm (8.3 x 6.7 x 3.5 in.); 2 kg
(4.4 lbs.). System in Carrying Case: 23 x 16.5 x 21.5 cm (9 x 6.5 x 8.5 in); 3 kg (6.6 lbs.).
Environmental
Fully operational at -40 to +60 °C (-40 to +140 °F). Snow, rain, dust and sand proof.
Drop proof from a height of at least 1 m (3 ft.).
PC Connection
After conducting the test(s), the MicroTrap™ VOD/Data Recorder is connected to a computer’s
USB port using the Communications Cable to allow fast downloading of the data to the computer.
The connection between the MicroTrap™ VOD/Data Recorder and the computer also allows the
operator to confirm and/or change the recording parameters.
Software
The DAS™ Data Acquisition Suite Software operates under Windows®. It provides an easy-to-use
and familiar graphical-user-interface that allows the operator to easily set the recording parameters
of the MicroTrap™ VOD/Data Recorder, download the data to the computer and analyze the data.
VOD data are automatically displayed as graphs of distance versus time. All Software operations
are “point and click”. The Software allows unlimited graphical zoom on graphs, creation of
annotated sub-graphs and VOD and hole/deck delay time analyses of any parts of the VOD
graph. Annotating, printing, saving and export of graphs and data to other Windows® software
are all easily accomplished. The operator can select Metric (m/s) or Imperial (ft/sec.) units.
VOD Excitation/Safety
The MicroTrap™ VOD/Data Recorder automatically adjusts its excitation voltage for the maximum
14-bit resolution across the VOD probe. All VOD operating parameters are recorded by the
MicroTrap™ VOD/Data Recorder with no requirements for additional instrumentation. For safety
considerations, the MicroTrap™ VOD/Data Recorder is physically unable to output as much as 50
mA of current to a VOD probe.
VOD Resistance Probes
A complete line of VOD probes is available from MREL to record the VOD of explosive samples
and multiple holes in large surface mine blasts. The MicroTrap™ VOD/Data Recorder can record
VODs across PROBECABLE-LR (resistance cable) lengths of up to 900 m (2,950 ft.) per test.
3.8 Technical Specifications