TE-CD-TSP 70 Operations Manual
The first line of the report identifies that this unit as a VFC+ with the given serial number and that this is
the REPORT format.
The second line indicates when the REPORT.CSV file was retrieved from the unit.
The “--------” line indicates the beginning of a sample record.
The “Start Time (Set)” and “Start Time (Act)” lines indicate when the unit was set to start and when it
actually started, respectively. These times could be different if there was a power failure at the
beginning of the test and the unit started late.
The “Duration” line indicates the actual sampling duration in Hours: Minutes: Seconds.
The “Conditions” line indicates whether the test and data provided are being reported at Ambient or
The “Flow (Set)” and “Flow (Avg)” lines indicate the flow rate set point and average values
respectively. The values are reported in L/min with conditions as indicated by the “Conditions” line.
The “Flow CV” line provides the value for the coefficient of variation of the flow rate during the test.
This is a measure of stability of the flow during the test. The closer the number is to zero the more
stable the flow. This value should usually be less than 2%. If it is greater, it could indicate a pending
failure of the motor, odd sites conditions (i.e. extremely gusty wind conditions), or someone tampering
with the unit during sampling.
The “Sample Volume” is the total volume (reported at the value stated in the “Conditions” line) that
passed through the sample media during the test. The value is reported in m3. This value may be
slightly larger than the value calculated by multiplying the duration by the average flow rate. This is
because the volume is recorded from the very beginning of the test, while the average flow calculation
starts after 1 minute to keep startup variation in the flow from affecting the average value. The
difference is very small and may not be noticeable on longer test.
The “Avg Amb Temperature” line reports the average ambient temperature during the sampling event.
The value is reported in degrees C.