Thermo Electron Polysonics SX40, Руководство пользователя

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Operation & Configuration
3-4 Polysonics SX40 User Guide Thermo Electron Corporation
fluctuates wildly. In this case, increase damping just enough to
reduce the fluctuation to an acceptable degree.
Note The Smart Filter used by the meter allows the damping
function to smooth small fluctuations without diminishing the
meter’s response to large flow changes, even when configured with
a high damping coefficient.
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c. Select regular or high Transmit Power, and press Enter.
In applications where the signal strength is low, the meter
automatically selects high transmit power. You can manually select
regular or high power in applications where the signal strength is
marginal or where you feel increased or decreased power output
may improve signal quality.
5. At the next screen:
a. Enter the Low Flow Cutoff. Press Enter, and scroll to the next
parameter.
When a zero flow condition occurs, internal sloshing and other
fluid movement can prevent the flowmeter from reading total zero.
This can result in totalizer errors. Minimize these errors by setting a
low flow cutoff which drives the flowmeter to zero for flow rates at
or below specified value.
b. Enter the Signal Strength Cutoff, and press Enter.
6. Select Next to continue. At this screen:
a. Enter the Signal Quality Cutoff, and press Enter.
b. Enter the SNR (signal-to-noise ratio), and press Enter.
7. Select Next. This screen displays flow and velocity readings. You can
also enter a site calibration factor:
a. Determine the flow using another source, and calculate the site
calibration adjustment by dividing the actual flow by the meter
flow.
b. Enter the site calibration adjustment.
8. Select Next. At this screen:
a. Scroll to the required totalizer unit (US gallons, Imperial gallons,
million gallons, cubic feet, cubic meters, liters, oil barrels, liquid
barrels) and press Enter.