Meriam M2 – Series Smart Manometer - Manual (Page 16)

10
calculation sheet), any flow unit
DP = Differential pressure corresponding to Q,
unit must be inches H
2
0 @20°C
Example: If the DP is 25 inches H
2
0 @20°C when the flow
rate is 10,000 units, then the Flow constant is 2,000.
Damp Rate Select
Adjustable exponential type damping is available to steady
the display when measuring pulsating pressure or flow.
The Smart Manometer has a range of damping rates; 0.1,
0.2, 0.5, 1, 2, 5, 10, or 25 seconds. Exponential damping
shows approximately 70% of a step change in pressure
upon the next display update. When set for 5 second time
constant, it takes 5 seconds from the time of the step
change until the manometer displays the full value of the
new pressure.
To set the damp rate, follow the steps below:
Keystroke Display
1. Follow the steps
on page 4 to put the
unit in Program
Mode Top line reads PROGRAM
MODE” and bottom line
reads “UNITS SELECT”.
2. Press the 
arrow key.
Bottom line reads “DAMP
RATE SELECT”.
3. Press the PRGM
key.
Top line reads “DAMP
RATE SELECT”.
4. Press the  or 
arrow key until the
desire desired damp
rate is displayed on
the bottom line. Bottom line shows damp
rate in seconds.
5. Press the PRGM
key. Top line reads
“PROGRAM MODE” and
bottom line reads “UNITS
SELECT”.
6. Press the 
arrow key.
Bottom line reads “EXIT”.
7. Press the PRGM
key. Returns to Measure
Mode.