14
Signet 2580 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 ineff ective if the AVERAGING function is set to off (seconds).
No AVERAGING, no SENSITIVITY
AVERAGING only
AVERAGING and SENSITIVITY
With AVERAGING set to Off and with SENSITIVITY set to zero, the
2580 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
refl 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 defi 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 2580 provides two tools that are designed to "work around" these defi 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 Off , 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 2580 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 off 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 2580 circuit board are useful to identify problems with the meter and the fl ow conditions.
LED Condition
Indication
All Off
The power is off 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
