Heath Consultants Hi Flow Sampler - Manual (Page 21)

Hi Flow

Sampler Operation
Instruction 0055-9017 21
2.14.2 Manual Measurement Mode
2.14.2.1 Manual 2-Stage Mode
In the Manual 2-Stage mode the user starts a measurement at a high flow rate, waits for
a stable leak rate reading, and then manually saves the readings using the Save
function. The unit then automatically lowers the flow rate, at which time the user makes
a second leak rate measurement. After waiting for the leak rate reading to once again
stabilize, the user then manually saves all final measured and calculated measurements
in memory. This mode is used when more control of the leak rate measurement process
is required. Select Manual 2-Stage operation as follows.
1. From the Expanded Main Screen, select Menu > Operating Mode.
2. Highlight Manual 2-Stage, and then press the I/O ↵ key.
3. Press ESC to return to the Main Screen. Observe that (M) should appear at the
bottom of the screen.
2.14.2.2 Manual 1-Stage Mode
In the Manual 1-Stage mode the user starts a measurement at a high flow rate and then
waits for a stable leak rate reading to occur. During this time the flow rate can be
changed using the Speed function on the Main Screen. After a stable leak rate reading is
obtained, the user can manually save all final measured and calculated values in
memory using the Save function on the Expanded Main Screen. This mode is used when
more control of the leak rate measurement process is required. Select Manual 1-Stage
operation as follows:
1. From the Expanded Main Screen, select Menu > Operating Mode.