Heath Consultants Hi Flow Sampler - Manual (Page 36)

Operation Hi Flow

Sampler
36 Instruction 0055-9017
2. Choose an attachment that will ensure the complete capture of the gas leak.
Connect this attachment to the end of the Hi Flow  Sampler’s main sampling hose
and position the attachment’s inlet over the leak source.
3. Position the inlet of the instrument’s background gas sampling hose opposite the
leak source, such that the leak source will not contribute to the background
measurement.
4. Begin the measurement process by selecting Start from the Main Screen.
5. The user is now asked to choose a new or different Test ID.
Selecting Yes causes the Access Records menu to appear (refer to Section 2.15).
After selecting or creating a new Test ID, start the measurement by pressing ESC
until the Main Screen appears. Selecting No returns the display to the Main Screen
and starts the measurement using the current Test ID.
6. Begin measuring until a stable leak measurement is achieved—this may take several
minutes.
If desired, the flow rate can be manually controlled by using the Speed function.
Each press of the I/O ↵ key will lower the flow rate as indicated by the speed bar
moving to the left.
7. Once a stable leak measurement is obtained, all current readings can be saved in
memory by highlighting Save and pressing the I/O ↵ key.
In the example below, the current measured leak concentration is 15% gas, and the
calculated leak rate is 42.5 lpm.