Gas Flow Analyzers
What is the VT650, VT900/VT900A Excel Plug-In used for?
The Excel Plug-In is used to download test data to your PC for upload. The Excel Plug-In can download numerical data as well as graphs to ensure that you are able to get your test results into a report and even into your CMMS. Easily download the Plug-In from the gas flow analyzer software page and install on your PC.
When and how do I use the VT900/VT900A Ultra-Low Flow and Ultra-Low Pressure ports?
There are certain applications that require high resolution and high accuracy to ensure functional performance. Examples of such devices would be anesthesia machines and neonatal ventilators. In these applications, you simply connect the tubing to the ports on the nearside of the VT900A and switch your screen to the ultra-low flow and ultra-low pressure views.
How do I use the VT650, VT900/VT900A for troubleshooting ventilator problems?
Under “Menus” and “Special Tests” there are a number of tests that can help troubleshoot and identify failure modes. These tests include:
- Airway Pressure Leak Test
- High Pressure Leak Test
- Low Pressure Leak Test
- Ultra-Low Pressure Leak Test
- Trend Test
- Stacked Volume Test
- High Frequency Test
Q; What is a Test Profile?
The connection to our gas flow analyzers changes depending on the testing you are about to do.
If you are testing breath parameters or bi-directional flow the connection should be a Y connector on the flow inlet side and a calibrated test lung on the flow exhaust side. Always use an antibacterial filter on the inlet side to elongate the life and accuracy of your gas flow analyzer.
When testing uni-directional flow or concentration measurements the DUT simply needs to be connected to the flow inlet side using an antibacterial filter.
When do I/How do I decide which option to select for Bidirectional Flow (Bidirectional; Uni-directional; Continuous)?
The breath detection mode should be changed depending on what it is that you are testing. Breath detection modes can be changed under “Menus”, “Setup”, “Breath Detect”.
If you are testing breath parameters using a test lung, you want to be in bi-directional mode. This will allow the flows to pass through the gas flow analyzer in both directions to simulate human breathing.
How do I connect the VT900A and VAPOR for testing anesthesia systems?
The connection of VT900A for testing the ventilator function of an anesthesia delivery system is unchanged from normal breath by breath or constant flow testing.
VAPOR needs to be used to test the anesthetic agent concentrations as well as carrier gas concentrations. VAPOR is connected to the VT900A using the connector on the back of the VT900A. The inlet should be connected to the fresh gas outlet using a tee connector to pull a side stream sample. The exhaust ends of the tee connector and VAPOR should be connected to the anesthesia gas scavenging system (AGSS).
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