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)
- Immediate and simultaneous real-time workplace video and display of dust measurement
- All-in-one video dust monitoring system
- Wireless video camera, customized portable PC with radio receiver, wireless particulate monitor, software, and hardware all packaged in a rolling carry case with handle
- Digital and wireless for unattended monitoring
- Concurrent collection of filter samples for gravimetric and chemical analysis
- Built-in pump provides an adjustable 1.2 to 4 L/min flow
- Uses in-line 37-mm cassette
- > 8 hours operation on one battery charge
- True breathing zone measurements of inhalable, thoracic, or respirable particles
- Easily interchange sampling heads
- Record-to-disk feature
- Visual proof of exposure, concrete documentation of data
Introducing the HAZ-DUST VDM-7500, 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.
Principle of Operation
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
Performance Profile
| 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: |
1.2 to 4 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 AC operation) |
| Portable PC: |
Pentium 4, 2.6 GHz, 14.1-in TFT display (110/240 AC operation) |
Total System |
| Weight (with case): |
15 lbs (6.8 kg) |
| Approvals: |
CE marked |
| Description |
Cat. No. |
VDM-7500 Wireless Video Dust Monitoring
System 110 V-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
Use the VDM-7500 only with the HAZ-DUST monitor included
with the system.
Requires calibration with equipment sold separately
|
|
| Sampling Heads for Personal Monitor |
Cat. No. |
| 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 Cyclone Respirable Sampling Head, required when using GS-3 Cyclone |
|
| Accessories for Personal Monitor |
Cat. No. |
| Calibration Standard | |
| Replacement Battery Pack for Personal Monitor, NiMH | |
| Chargers for Personal Monitor 110 V | |
| Chargers for Personal Monitor 240 V | |
References
- Analyzing Workplace Exposures Using Direct Reading Instruments
and Video Exposure Monitoring Techniques, NIOSH, No. 92-104,
1992.
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.
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)
This page was last modified January 7, 2010