GF FlowtraMag GF 2581, Operating Instructions Manual

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20 2581 FlowtraMag
®
Meter
LED Status Indicators
10 s 2 s 20 s 30 s 40 s 50 s 60 s 70 s
NOTE: The SENSITIVITY function is ine ff ective if the AVERAGING function is set to o ff (seconds).
No AVERAGING, no SENSITIVITY
AVERAGING only
AVERAGING and SENSITIVITY
With AVERAGING set to O ff and with SENSITIVITY set to zero, the
2581 FlowtraMag responds to every unstable shift in the fl ow.
The dashed red line represents the actual output of the fl ow sensor
in unstable fl ow conditions.
With AVERAGING set to Medium and SENSITIVITY still set to zero
the
fl ow rate is stabilized, but a sharp change in fl ow rate is not
represented for 50 seconds or longer (dotted green line).
With AVERAGING at Medium and SENSITIVITY set to a moderate
amount, the
fl ow rate is stabilized, while the sudden shift in fl ow is
re fl ected very quickly (solid blue line).
• Because ideal fl ow conditions are often impossible to achieve, the fl uids fl ow is often erratic, which causes erratic readings in
control features (e.g., relays, 4 to 20 mA loops, etc.) that are associated with the fl ow rate.
• The best solution to these problems is to correct any piping de fi ciency that causes the instability. This may involve longer
straight runs upstream, taking steps to ensure pipe remains full during fl ow conditions, and other installation changes.
In many situations, however, these measures are simply not possible.
• The 2581 FlowtraMag provides two tools that are designed to "work around" these de fi ciencies. The Averaging and the
Sensitivity features should be studied before making adjustments.
Averaging Time in Seconds (Factory set: Low)
• Set the time the meter will use as the averaging period. The ranges are O ff , Low (10 s), Med (40 s) and High (120 s).
Use higher averaging times to smooth the display and current output where the fl ow in the pipe is erratic.
Quick Response Sensitivity (Factory Set: 0.5 m/s (1.64 ft/s) equivalent)
• Sets an amount of fl ow rate change at a given reference fl ow rate required to momentarily allow the 2581 FlowtraMag to change
from the selected averaging time to a faster response. The reference fl ow rate should be near the range of normal operation.
Turn the averaging setting to o ff and observe the fl ow rate variation, enter a sensitivity amount that is two times larger than the
amount of fl ow variation.
Averaging and Sensitivity Settings
LEDs on the 2581 FlowtraMag circuit board are useful to identify problems with the meter and the fl ow conditions.
LED Condition Indication
All O ff The power is o ff or the sensor is not connected
Solid Blue Normal operation, full pipe, no fl ow
Blinking Blue Normal operation, blink rate is proportional to fl ow rate
Solid Purple Partially fi lled pipe, fl ow rate is zero
Blinking Purple Partially fi lled pipe, blink rate is proportional to fl ow rate
Blinking Red Measurement out of range. If condition persists, will turn to solid red after 1 minute
Solid Red Instrument error, defective electronic component. Contact Technical Support
Green - Connected device
White - No connections