T: +1-613-545-0466 F: +1-613-542-8029 www.mrel.com
5
connectors on the
DataTrap II™
Data/VOD Recorder
. This low excitation signal ensures that the
DataTrap II™
Data/VOD Recorder
will not
prematurely initiate explosives and/or detonators. When measuring DC signals, the
DataTrap II™
Data/VOD Recorders
channels do not
output any excitation voltage or signal.
Standard (and common sense) rules apply when it comes to the presence of electrical storms near the testing area. Due to the inherent
hazards associated with blasting during these storms, in addition to the possibility of electrical interference causing false trigger signals
to the
DataTrap II™
Data/VOD Recorder
, it is recommended to immediately suspend all blasting activities and evacuate the area. This is
standard policy at most blasting operations.
2.3 DC Signal Recording Applications of the DataTrap II™
Data/VOD Recorder
As previously mentioned, the
DataTrap II™
Data/VOD Recorder
has the ability to function as a digital oscilloscope to record DC voltage
signals from a wide variety of commercially available gauges. Typical applications of the
DataTrap II™
Data/VOD Recorder
when used
as a voltage recorder include:
•
Measurement of detonation pressure using calibrated PVDF (polyvinylidene fluoride) gauges.
•
Measurement of air blast over-pressures using commercially available air blast pressure transducers.
•
Measurement of cross-blasthole pressures using carbon composition resistors and/or commercially available tourmaline gauges.
•
Measurement of temperatures using thermocouples.
•
Measurement of strains using strain gauges.
•
Measurement of any phenomena that can be instrumented with gauges producing DC voltage signals in the range from -10 to +10
volts.
2.4 VOD Recording Applications of the DataTrap II™ Data/
VOD Recorder With VOD Upgrade
If the
DataTrap II™
Data/VOD Recorder
VOD Upgrade
has been installed,
VOD
can be recorded or DC voltage and
VOD
can be
recorded simultaneously. When used as a
VOD
recorder, the main applications of the
DataTrap II™
Data/VOD Recorder
include:
2.4.1 Testing of Explosive Samples
•
Test the performance of explosives against the quality control standards set by the manufacturers.
•
Measure the continuous
VOD
in any charge diameter under confined or unconfined conditions.
•
Determine the critical diameter and critical density of an explosive charge.
•
Determine the gap sensitivity of explosives.
•
Measure the timing accuracy of detonators.
•
Measure the continuous
VOD
of primers/boosters.
•
Determine the minimum booster size for any explosive by measuring run-up velocities.
2.4.2 Testing of Explosives In Blastholes
•
Measure the continuous
VOD
in any hole diameter, wet or dry holes, and in any type of rock.
•
Measure the continuous
VOD
in multiple holes per blast per channel.
•
Since the
DataTrap II™
Data/VOD Recorder
has 8 channels, it can record 8 holes firing simultaneously.
Summary of Contents for DATA TRAP II
Page 5: ...T 1 613 545 0466 F 1 613 542 8029 www mrel com 1 Chapter 1 Getting Started...
Page 7: ...T 1 613 545 0466 F 1 613 542 8029 www mrel com 3 Chapter 2 Introduction...
Page 11: ...T 1 613 545 0466 F 1 613 542 8029 www mrel com 7 Chapter 3 Hardware...
Page 25: ...T 1 613 545 0466 F 1 613 542 8029 www mrel com 21 Chapter 4 Memory And Triggering...
Page 28: ...DataTrap II Operations Manual Edition 5 4 24...
Page 29: ...T 1 613 545 0466 F 1 613 542 8029 www mrel com 25...
Page 30: ...DataTrap II Operations Manual Edition 5 4 26...
Page 50: ...DataTrap II Operations Manual Edition 5 4 46...
Page 51: ...T 1 613 545 0466 F 1 613 542 8029 www mrel com 47 Chapter 7 Strain Gauge Upgrade...
Page 59: ...T 1 613 545 0466 F 1 613 542 8029 www mrel com 55...