E8500 Instruction & Operations Manual
version 1.017
Page 28 of 49
17) VELOCITY UNITS: (Velocity Option) Select between feet per second (FPS), meters
per second (MPS), cubic feet per minute (CFM), or cubic meter per minute (CMM).
VELOCITY AND DRAFT/PRESSURE CAN NOT BE MEASURED
SIMULTANEOUSLY. USER MUST CHOOSE ONE OR THE OTHER.
To change the selection, hit the
SETUP
key. Using the
DOWN
arrow key, scroll
Down to
Velocity Sensor
and hit
OK
. The
OFF/ON
selection will be highlighted. Use
the Up & Down arrow keys to change the selection from OFF to ON or vice versa. With
the Velocity Sensor selection
OFF
, the analyzer will measure
Draft/Pressure (DFT)
automatically. With the Velocity Sensor selection
ON
, the analyzer will measure
Velocity (VEL)
automatically. When you have your selection chosen, hit the
OK
button
and the entire Velocity Probe will be highlighted again. Hit the
MEASURE
Button to get
back to the main measurement screen once you are complete.
Connect the supplied hoses from the S-Type Pitot tube to the positive (+) and
negative (-) PRESSURE connections on the top/front of the analyzer. The S-Type Pitot
tube must always be oriented with the open tips parallel to the direction of the stack gas
flow as shown on the following figure:
18) STACK SIZE: (Velocity Option). Estimate the cross-section area of your stack in
square inches (in2) and set this value to obtain accurate stack gas flow
measurements in CFM or CMM.
