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HAZ-DUST VDM-7500
Wireless Personal Video Dust Monitoring System
Haz-Dust VDM-7500 Spec. Sheet (PDF)
Calibration Span Reference for HAZ-DUST IV and VDM-7500 Operating Instructions (PDF)
HAZ-DUST VDM-7500 PowerPoint Show (12.4 mb)
HAZ-DUST VDM-7500 PowerPoint Show zip format (9.3 mb)
HAZ-DUST VDM-7500 PowerPoint show html version (view in browser)
- All-in-one system
- Wireless video camera, portable PC, wireless particulate monitor, radio receiver, software, and hardware all packaged in a rolling carry case with handle
- Expandable up to 4 channels to accept 4 cameras/receivers and wireless dust monitors
- Digital and wireless for unattended monitoring
- Simultaneous real-time workplace video display, dust readings, and gravimetric collection for any type of aerosol
- Built-in sample pump for concurrent air sampling
- Record-to-disk feature
- Visual proof of exposure, documentation of readings for compliance and liability
- True breathing zone measurements of inhalable, thoracic, or respirable particulate
- Interchangeable sampling heads
- Compact and rapidly deployed
The HAZ-DUST VDM-7500 is a portable, turnkey personal dust monitoring system that automatically overlays exposure video onto real-time dust concentration data. Only the VDM-7500 combines this feature with a wireless system that is portable, affordable, and easy to use. With the VDM-7500, easily characterize worker exposure for effective implementation of controls or combine worker activity data with real-time exposure data for a comprehensive review and analysis by health and safety professionals.
HAZ-DUST VDM-7500 — How to Use It
The calibrated particulate monitor is worn attached at a worker’s
waist. The sensor is clipped in the worker’s breathing zone.
The wireless video camera is set up in the worker’s area. The
case containing the PC is set in a location where AC power is available.
Monitor worker exposure over the entire workshift or during specific
tasks for which data is required. The VDM-7500 automatically records
and synchronizes real-time exposure concentrations and video. Using
DustComm Pro Software on the system’s PC, view real-time measurements
and video during monitoring and easily produce management-ready reports
after monitoring.
The particulate monitor component of the VDM-7500 system operates on the principle of near-forward light scattering of infrared radiation. This measurement technique uses an infrared light source positioned at a 90-degree angle from a photodetector. As the airborne particles enter the infrared beam, they scatter the light. The amount of light received by the photodetector is directly proportional to the aerosol concentration. Unique signal processing internally compensates for noise and drift.
NIOSH Requirements for a Video Exposure Monitoring System
NIOSH reported that a Video Exposure Monitoring (VEM) technique can be used to "associate events and exposures and to promote more effective and focused recommendations for controlling the air contaminant exposures."1 System requirements included the following:
- A direct-reading instrument that provides a voltage output proportional to concentration
- Response time that is less than that of the events of interest
- Specificity for the contaminant of interest
- Portability
The HAZ-DUST VDM-7500 advanced technology meets these requirements and provides ease of mixing data and video and wireless communication at a much lower cost than earlier telemetry-based VEM systems.
VDM-7500 Applications- Identifying tasks/elements that produce high exposure levels or contribute most to worker exposures
- Performing time/motion studies that correlate worker activity with resulting exposure
- Identifying sources of worker exposure and contaminant generation rate
- Determining effectiveness of ventilation systems
- Comparing worker-to-worker activity and exposure
- Performing qualitative and quantitative studies with a duration too short for integrated air sampling methods
- Demonstrating controls effectiveness
- Monitoring exposure
- Selecting respiratory protection
- Training workers
- Performing safety audits
- Reviewing compliance programs
- Supplying documentation for worker compensation issues
- Performing insurance investigations
| Personal Monitor | |
| Accuracy | ± 10% to filter gravimetric SAE fine test dust |
| Sensing Range | .01 to 200 mg/m3 |
| Particulate Size Range | 0.1 to 100 µm |
| Precision | ± 0.02 mg/m3 |
| Calibration | NIOSH 0600 gravimetric reference - NIST-traceable SAE fine test dust |
| Sample Flow Rate | 1.0 to 3.3 L/min |
| Power | Rechargeable NiMH battery |
| Operating Time | > 8 hours |
| Charging Time | 10 to 12 hours |
| Data Storage | 21,500 data points |
| Digital Output | RS-232 for data download, RS-232 wireless for real-time data transmission |
| Dimensions | Case: 5.4 x 3.3 x 2.75 in (13.7 x 8.4 x 6.8 cm) |
| Sensor: 1.75 x 1.5 in (4.4 x 3.8 cm) | |
| Weight | 1.5 lbs (0.7 kg) |
| VDM-7500 PC and Video Components | |
| Video Camera | Color, 2.4 GHz, NTSC to video board (8-hr battery or continuous AC operation) |
| Portable PC | Pentium 4, 2.6 GHz, 14.1-in TFT display (110-240 V AC power supply) with CD-ROM, keyboard, mouse, and Windows XP (English/U.S.) |
| Total System | |
| Weight (with case) | 15 lbs (6.8 kg) |
| RFI/EMI Shielded | CE marked |
| Description | Cat. No. |
VDM-7500 Wireless Video Dust Monitoring
System, 110-240 V, includes
wireless particulate monitor, wireless video camera, customized
portable PC with radio receiver, and software and hardware
setup packaged in a rolling carry case with handle |
|
| Sampling Heads for Personal Monitor | |
| Inhalable Sampling Head and Adapter, IOM Sampler, mounts on monitor sensor | |
| Thoracic Sampling Head, mounts on inlet or monitor sensor | |
| Respirable Sampling Head, GS-3 Cyclone, mounts on monitor sensor | |
| Adapter for GS-3 Respirable Cyclone Sampling Head, required when using GS-3 Cyclone | |
| Accessories for Personal Monitor |
|
| Calibration Standard for monitor, for verifying span and optical sensor performance | |
| Replacement Battery Pack, NiMH | |
| Charger, for VDM-7500 and HAZ-DUST IV, 110-240 V | |
| Note: | Customers who already have a Haz-Dust unit CANNOT use it in the VDM system. The Haz-Dust unit in the VDM system has a modified EPROM code that allows it to be wireless. |
References
- Analyzing Workplace Exposures Using Direct Reading Instruments and Video Exposure Monitoring Techniques, NIOSH, No. 92-104, 1992.
Haz-Dust VDM-7500 Spec. Sheet (PDF)
Calibration Span Reference for HAZ-DUST IV and VDM-7500 Operating Instructions (PDF)
HAZ-DUST VDM-7500 PowerPoint Show (12.4 mb)
HAZ-DUST VDM-7500 PowerPoint Show zip format (9.3 mb)
HAZ-DUST VDM-7500 PowerPoint show html version (view in browser)
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