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ShockLog >> Micro ShockLog |
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Micro ShockLog
Manage critical shipments with Micro ShockLog – A Cost Efficient Tri-axial Shock and Vibration Monitor
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The Shockwatch® Micro ShockLog combines tri-axial piezo electric accelerometer technology with state of the art electronics and field proven software. The end result is a remarkably affordable advanced shock and vibration monitoring instrument.
The Micro ShockLog can record impact and temperature events over timeframes up to 17 months or more. In addition, the Micro ShockLog is the first full function shock recorder to allow setup and data extraction in the field without a PC or other hand held computer.
Key Features
• 6 month life from single AA lithium battery
• Three built in accelerometers
• iButton® interface – no PC required in the field
• Non volatile memory records 500 day history
• Records first and up to nine most significant events in detail
• Records time and amplitude of 128 most recent events
• Temperature monitor standard, humidity sensor optional
• Timeslot recording for complete shock and vibration history |
The Micro ShockLog offers several unique features that permit the effective use of shock monitoring equipment by unskilled personnel after minimal training while significantly reducing the cost of deployment in the field.
During operation low power analog circuits continuously monitor the signals from the three in-built accelerometers. The peak value of acceleration in each timeslot period is recorded in the timeslot memory. The timeslot memory can be set to as little as 10 seconds or as long as one hour.
The detailed event recording system will be triggered if the level of acceleration from any sensor exceeds a preset threshold. This function will record the event at a rate of up to 1,024 measurements per second on each accelerometer. Sampling rates and event duration can be set by the user. Since only a finite amount of memory is available, the detailed recordings for the first and nine most significant events are recorded. In addition the maximum values for X, Y, Z and the modulus for the most recent 128 events are recorded along with the event time stamp.
The Micro ShockLog can be configured by attaching it to a PC running standard ShockLog software. The ShocLog software operates on a desktop or portable PC using Windows 95, 98, or Windows NT4 operating systems. All the data stored in the ShockLog can be downloaded to a PC and analyzed offline.
When using the device, it is not necessary to use a PC or similar hand-held computer. Since the cost of deploying PCs in the field can be prohibitive, the Micro ShockLog offers an iButton® interface. This simple socket on the unit’s front panel is activated by the touch of a button-sized device. The iButton is a product of Dallas Semiconductor.
| You can set up iButtons yourself on a PC or purchase them pre-initialized to configure the Micro ShockLog and set its clock. The unit used two LEDs to guide the operator in the use of the iButton and to confirm successful data transfer. Pre-initialized iButtons offer four standard functionalities – Start, Stop, Setting, Download. For instance, using the Download iButton you can extract a summary of the Micro ShockLog recorded data and read this on a remote PC. Specific reports however, require the full serial cable interface. |
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Reports may be viewed onscreen and selected data exported to other applications. Any set of report parameters may be graphed against time and detailed graphs of individual events may be plotted on screen, printed or saved as files.
Summary report: The mission can be split into as many as 512 summary periods which may be from 10 minutes to twenty four hours long. The following parameters are reported in spreadsheet form: date, time, number of alarms, max x/y/z, min x/y/z, (humidity), rms x/y/z, max/min temperature, range.
Events summary report: The first and 127 most recent events are presented in a graphical or spreadsheet form. The following parameters are available: date, time, range, temperature, max/min x/y/z, modulus.
Event details report: For the first time and the (nine) most significant events, detailed information is available in spreadsheet or graph form.
Time slot report: Data recorded in the timeslot memory can be displayed in graph form. The following parameters are available: date, time, max pk x/y/z, internal temperature, humidity.
Mission report: This report can be extracted in the field using an iButton. It offers a summary of the complete mission data set including a condensed view of the timeslot data, the Events Summary report for up to 128 events and a condensed plot of the most significant event.
Security log report: Security log data can be displayed in spreadsheet form. The following parameters are available: password changes, setup changes, battery changes, data clearing operations or resets.
Battery Type: AA Lithium
Battery Life: 6 months
Unit Size: 85mm X 85mm X 50mm
Unit Weight: .3kg
Operating Temperature Range: -40°C to 85°C (-40°F to 185°F)
Memory Size: 500k bytes (.5 meg)
Recording Duration: Up to 500 days
EMC Rating: FCC CFR47 (July 1996) Part 15 Limit B
Environmental Rating: IP67
Low Frequency Cutoff: .3 Hz.
High Frequency Cutoff
10G Model 40 Hz.
100G Model 250 Hz.
Resolution: .3% of scale
Scale Factor Accuracy: +/- 5% at 25°C (77°F)
Sampling Frequency: 2048 samples per event
The Micro ShockLog stores all data and status information in high performance sector erase FLASH memory. This memory requires no power to retain data and offers special hardware protection against erasure.
Before the software will communicate with the Micro Softlog the user must supply any user passwords which may have been set to restrict access to data, resetting, calibration or other functions. If the iButton interface is used passwords may still be configured if required.
A special section of the flash memory is reserved for the security log – this records the timing of such actions as removal of the battery, resetting the clock or clearing out data and can not be easily modified by the operator. It is intended that the security log last the operating life of the instrument and should only be cleared when the ShockLog is re-calibrated by Shockwatch®.
| Packaging and Environment | The Micro ShockLog has been designed to function reliably in difficult environments. The electronic components use surface mount technology. The complete electronic and transducer package is coated with acrylic resin and enclosed in a metal case.
The construction of the Micro ShockLog along with the absence of cables for power or sensors results in a very high immunity to electrical interference as well as low levels of RF emission. The unit may safely be used in close proximity to sensitive instruments or in complex electrical environments.
The Micro ShockLog has been designed to meet IP67 (including connector with cap fitted) and is capable of operating at temperature between -40 and 185 degrees F. | 
