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M i c r o T r a p ™ O p e r a t i o n s M a n u a l - E d i t i o n 4 . 4

II

Copyright Information

MREL Group of Companies Limited (MREL) warrants that the product is free from Manufacturer’s defects for a period of one (1) year from
the date of shipment to the Customer. This Warranty covers all parts and labour.

MREL does not warrant that the product will meet the Customer’s requirements, or that it will operate in the combinations which may be
selected by the Customer.

MREL does not and cannot warrant the performance or results that may be obtained by using the product. Accordingly, the product and its
documentation are sold “as is” without warranty as to their performance, merchantability or fitness for any particular purpose. The Customer
assumes the entire risk as to the results and performance of the product.

MREL is committed to product innovation; accordingly product may undergo specification improvements without notice. Copyright ©
2022 MREL Group of Companies Limited. MicroTrap™ VOD/Data Recorder, MicroTrap™ VOD/Data Recorder Logo, and MREL Logo
are trademarks or registered trademarks of MREL Group of Companies Limited. Windows® is a registered trademark of Microsoft
Corporation.

© Copyright 2022, MREL Group of Companies Limited. This Operations Manual supersedes any earlier editions. All Rights Reserved.
Reproduction or adaptation of any part of this documentation or Software without written permission of the Copyright owner is unlawful.

Publication History

Edition 4.4, 2022

This version of the Manual

Edition 4.0, March 2014

Edition 3.0, February 2013

Edition 2.2, March 2009

Edition 2.1, January 2009

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Содержание MicroTrap

Страница 1: ...MREL GROUP OF COMPANIES LIMITED 5 779 Sir John A MacDonald Blvd Kingston Ontario K7L 1H3 Canada T 1 613 545 0466 E contact mrel com www mrel com Operations Manual Edition 4 4...

Страница 2: ...any particular purpose The Customer assumes the entire risk as to the results and performance of the product MREL is committed to product innovation accordingly product may undergo specification impro...

Страница 3: ...losives in Blastholes 8 2 4 Applications of the MicroTrap with Scope Upgrade Installed 8 Chapter 3 Hardware 9 3 1 Hardware Components 10 3 1 1 MicroTrap VOD Data Recorder 10 3 1 2 Carrying Case 15 3 1...

Страница 4: ...Setup Procedure for VOD Measurements 30 4 7 Probe Resistance Out of Range Lights 32 4 8 Utilizing the External Trigger 33 4 9 Additional Information on Memory and Triggering 33 4 9 1 Memory 33 4 9 2 T...

Страница 5: ...T 1 613 545 0466 www mrel com contact mrel com 1 Chapter 1 Getting Started...

Страница 6: ...istance probes VOD PROBERODs and or VOD PROBECABLE and or VOD PROBECABLE LR Optional 1 1 MicroTrap Hardware Included All of the steps detailed in this Chapter should be completed before the Operator g...

Страница 7: ...capture the test which includes the amount of Pre Trigger Time and the Total Time Recording Rate is the number of points captured per second The faster the Recording Rate the shorter the amount of tim...

Страница 8: ...M i c r o T r a p O p e r a t i o n s M a n u a l E d i t i o n 4 4 4...

Страница 9: ...T 1 613 545 0466 www mrel com contact mrel com 5 Chapter 2 Introduction...

Страница 10: ...S Data Acquisition Suite Software for more information The main features of the MicroTrap VOD Data Recorder for VOD recording are One VOD channel capable of recording at up to 2 MHz 2 million data poi...

Страница 11: ...on 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 st...

Страница 12: ...f stemming material to be used between decks of explosives to prevent sympathetic detonation or explosive desensitization from occurring 2 4 Applications Of MicroTrap with Scope Upgrade Installed As p...

Страница 13: ...T 1 613 545 0466 www mrel com contact mrel com 9 Chapter 3 Hardware...

Страница 14: ...e MicroTrap VOD Data Recorder hardware are provided in Chapter 4 The main features of the control panel are outlined below MAIN CONTROL PANEL Power The ON OFF switch is used to provide power to the Mi...

Страница 15: ...nced operations are being performed Battery Level The BATTERY STATUS button is pressed to display the battery level on the LED screen The MicroTrap VOD Data Recorders battery level is displayed in int...

Страница 16: ...e remaining tests have been increased by 1 and that the last test in the MicroTrap VOD Data Recorders memory has been deleted Trigger Selection The TRIG EXT INT switch selects internal INT or external...

Страница 17: ...ta in the MicroTrap VOD Data Recorders memory in the absence of a PC This can be performed in the following steps 1 Turn ON the MicroTrap VOD Data Recorder 2 Press the NEXT TEST button to put the Micr...

Страница 18: ...rger to recharge the internal battery and to operate the MicroTrap VOD Data Recorder from AC mains power The DC IN OUT port can also be used to power the MicroTrap VOD Data Recorder from an external 1...

Страница 19: ...as been stored in the MicroTrap VOD Data Recorder s memory Otherwise the light will remain off BLACK VENT The black knob on the front of the MicroTrap VOD Data Recorder is an automatic pressure relief...

Страница 20: ...ur additional BNC Adapters are provided one for each Scope input channel 3 2 Internal Rechargeable Battery The MicroTrap VOD Data Recorder has an internal Ni Cad rechargeable battery The MicroTrap VOD...

Страница 21: ...can be tested as detailed in Chapter 3 3 3 5 Operating The MicroTrap from External Power Sources The MicroTrap VOD Data Recorder can be operated from AC voltage mains power using the Battery Charger...

Страница 22: ...wire placed within a small diameter metal tube which acts as the return lead of the circuit PROBERODs are specifically designed to measure VODs of explosive cartridges and or of short sample tubes of...

Страница 23: ...as the delay times between holes and decks The selection of either PROBECABLE or PROBECABLE LR is based on the total resistance of the circuit which in turn depends on the number of holes being monit...

Страница 24: ...ntal 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 i...

Страница 25: ...T 1 613 545 0466 www mrel com contact mrel com 21 Chapter 4 Recording VOD And Hole Deck Delay Times...

Страница 26: ...rs or explosive cartridges It can also measure the VOD of explosives loaded in multiple surface or underground blastholes The MicroTrap VOD Data Recorder provides a regulated constant excitation signa...

Страница 27: ...ot touch each other across the connection 4 Note the Unit Resistance of the probe by reading the value in ohm m or ohm ft from the MREL factory label on the PROBEROD Note the ohm m value if the VOD is...

Страница 28: ...328 ft MREL Product 1 06 01 Sample of Packaged Explosive VOD PROBEROD or VOD PROBEROD HS MREL Product 1 05 01 or 1 05 11 Detonator Blasting Machine See Figure 1 Place the RG 58 Coaxial Cable beside th...

Страница 29: ...ation will be requested later by the DAS Data Acquisition Suite Software When measured with a blaster s galvanometer the Probe Resistance should compare closely with the calculated resistance of the P...

Страница 30: ...ie a loose knot down the cables from the connection as shown above Twist the center conductors together Pull the shielding wires back along the cables and start taping from the cable to the end Figure...

Страница 31: ...3 Run the PROBECABLE between the first hole and the second hole leaving sufficient slack between the holes to allow for ground movement between the delayed holes Coil the slack cable near the collar o...

Страница 32: ...ose of connecting to the MicroTrap VOD Data Recorder VOD input A BNC Adapter is a short length of coaxial cable with a male BNC connector attached to one end and two bare leads on the other The BNC Ad...

Страница 33: ...der MREL Product 1 03 01 VOD PROBECABLE MREL Product 1 05 05 RG 58 Coaxial Cable 100 m 328 ft MREL Product 1 06 01 BNC Connector Male Delay between each hole Blasting Machine Stemming Bulk Explosive D...

Страница 34: ...a in memory then you can either clear the MicroTrap VOD Data Recorders internal memory using the DAS Data Acquisition Suite Software or by following this procedure a Turn ON the MicroTrap VOD Data Rec...

Страница 35: ...luminate and remain on during the collection of data this time depends on the recording rate and number of tests programmed into the MicroTrap VOD Data Recorder During this time both the START and STA...

Страница 36: ...ROBECABLE to the probe circuit This will not affect the VOD results If PROBECABLE LR is being used in the test then consider using PROBECABLE for such tests in the future The unit resistance of PROBEC...

Страница 37: ...cause the explosive itself generates an electrically conductive plasma in the vicinity of the detonation front that will assist in arcing the current from one wire to the other An example of a BREAK t...

Страница 38: ...s in turn reduces the resistance and thus the voltage across the probe decreases from the initial 5 0 VDC approximately set automatically by the MicroTrap VOD Data Recorder When the voltage across the...

Страница 39: ...r for sufficient PROBECABLE to be consumed The MicroTrap VOD Data Recorder has a very large memory and a very long Total Recording Time At a Pre Trigger setting of 25 the MicroTrap VOD Data Recorder h...

Страница 40: ...M i c r o T r a p O p e r a t i o n s M a n u a l E d i t i o n 4 4 36...

Страница 41: ...T 1 613 545 0466 www mrel com contact mrel com 37...

Страница 42: ...M i c r o T r a p O p e r a t i o n s M a n u a l E d i t i o n 4 4 38...

Страница 43: ...T 1 613 545 0466 www mrel com contact mrel com 39 Chapter 5 Recording Voltage Signals From Gauges...

Страница 44: ...als in harsh environments such as cross borehole propagation PVDF transducers to measure detonation pressures Thermocouples to measure temperatures Various PCB sensors to measure blast overpressures o...

Страница 45: ...as into the DAS Data Acquisition Suite Software to convert the graphs of voltage versus time to graphs of the appropriate engineering units versus time 4 Install your sensors in their final positions...

Страница 46: ...o fail the internal verification tests then contact MREL as the MicroTrap VOD Data Recorder requires service 3 Press the NEXT TEST button the STATUS light will stop flashing and will remain illuminate...

Страница 47: ...ate the MicroTrap VOD Data Recorder location if necessary 9 When the MicroTrap VOD Data Recorders internal triggering criteria is met i e the voltage signal on one of the channels has crossed the trig...

Страница 48: ...ggered when the open circuit is closed by the event of interest even if only momentary The traditional BREAK circuit is triggered when the complete circuit is broken even if only momentarily To create...

Страница 49: ...ne channel is being recorded the available recording time will be maximized for a given Recording Rate For example at the maximum Recording Rate 1 MHz the Total Recording Time will be 4 194 000 points...

Страница 50: ...M i c r o T r a p O p e r a t i o n s M a n u a l E d i t i o n 4 4 46...

Страница 51: ...T 1 613 545 0466 www mrel com contact mrel com 47 Chapter 6 MicroTrap VOD Data Recorder Software...

Страница 52: ...corder power ON NOTE If the USB cable has not been connected prior to turning ON the unit the User MUST wait approximately 5 seconds before connecting the USB cable or an unrecoverable error can occur...

Страница 53: ...T 1 613 545 0466 www mrel com contact mrel com 49 Chapter 7 Contacting MREL for Technical Support...

Страница 54: ...MREL Group of Companies Limited Blasting Instrumentation Team 5 779 Sir John A MacDonald Blvd Kingston Ontario K7L 1H3 Canada Toll Free 1 877 544 MREL Canada USA Tel 1 613 545 0466 Email support mrel...

Страница 55: ...T 1 613 545 0466 www mrel com contact mrel com 51...

Страница 56: ...itted to product innovation accordingly product may undergo specification improvements without notice Copyright 2022 MREL Group of Companies Limited MicroTrap VOD Data Recorder MicroTrap VOD Data Reco...

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