15
8150 Flow Totalizer
15. Sensitivity
The SENSITIVITY setting determines how the 8150 responds to sudden surges in the ow rate. It "overrides" the SPEED function just
long enough to allow an actual change in ow rate to be displayed, then resumes the averaging. The result is a smooth ow display
and a quick response to large shifts in the ow rate.
10 s
2 s
20 s
30 s
40 s
50 s
60 s
70 s
1
3
6
ENTER
2 s
2
ENTER
5
4
3x
Enter Security code
Example: Change the SENSITIVITY from 5 to 8
1. Hold the ENTER key for 2 seconds, then enter the SECURITY CODE.
The display shows the rst item in the menu, AutoCAL.
2. Press the UP key once to scroll to SENSITIVITY.
The display shows DISP SENS and the current sensitivity setting.
3. Press the RIGHT key to select the SENSITIVITY for editing.
The current SENSITIVITY setting begins ashing.
4. Press the UP key three times to scroll from 5 to 8.
5. Press the ENTER key to return to the menu.
6. Press UP and DOWN keys together to exit the menu and return to normal operation.
The display shows "Storing" for a few seconds, then returns to the normal operating display.
No SPEED, no SENSITIVITY
SPEED only
With SPEED averaging set to 0 (zero) and with SENSITIVITY set
to zero, the ow rate may be very unstable. This line represents
the actual output of the ow sensor as it responds to unstable
ow conditions in the pipe.
With SPEED set to 60 seconds and SENSITIVITY still set to zero
the ow rate is stabilized, but a sharp change in ow rate is not
represented for 60 seconds or longer. (dotted green line).
With SPEED at 60 seconds and SENSITIVITY set to 6, the ow
rate is stabilized, while the sudden shift in ow is re ected very
quickly. (dotted blue line)
NOTE: The SENSITIVITY function is ineffective if the SPEED function is set to zero (seconds).
SPEED and SENSITIVITY
