| The 7620 Application Software is especially developed to perform quantitative air exchange analysis using the tracer-gas technique. The Photoacoustic Field Gas-Monitor 1412 and the Multipoint Sampler and Doser unit(s) 1303 are connected to the PC via RS-232 interface or USB Com port. The user decides where the measurements will be performed, and connects the Sampler and Doser unit(s) to these locations with tubing so that the locations can be "dosed" with tracer-gas and air samples can be taken from the location and be analysed by the Monitor. The 7620 can either perform ventilation measurements using both the doser and sampler system with one or two tracer gases or a multipoint gas-monitoring tasks, using only the sampler system of the 1303 units. The user opens a database to receive the data from the task, and configures the 7620 to the instruments. When the configuration is complete, the 7620 is in control of the instruments, and the chosen task be set up and started. Measuremt data and the running status of the instruments, are displayed on-screen. Uses - Remote-control of a system comprising: a 1412 Monitor alone, or together with one or two Multipoint Sampler and Doser units 1303
- Enables ventilation and air-exchange measurement using tracer gases in up to 12 locations
- Enables multi-gas monitoring in up to 12 locations
- Synchronises the sampling and dosing functions of the Sampler and Doser units to the measurements cycle of the Gas Monitor
- Dosing is done by giving eithe constant dose of tracer gas to each location , or by maintaining a constant concentration of tracer gas at each location
- Two different tracer gases can be used to determine the spread of pollutants when using two Sampler and Doser units
- For each location, the 7620 stores up to 5 gas-concentrations, the humidity of the air, the amount of tracer gas dosed, and the temperature of the air
- Calculates the air-exchange efficiency, age-of-air and other parameters for each location
- Displays chosen measurement data in either table or in graph form
- Up to 6 graphs can be drawn on the same axes - giving direct comparison of results from different locations
- Data from external programs can be imported to 7620
- Open Database Connectivity (ODBC) for data exchange (for example, to spreadsheet and database programs)
- Supported by Windows 98, 2000 and XP
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