Dwyer UFM - Manual (Page 26)

F - UFM
Issue 1.4 Page 26
Storage temperature 14°F to 140 °F (-10°C to 60°C)
Humidity 90% RH at 122°F Max
Display
LCD 2 line x 16 characters
Viewing angle Min 30°, Max 40°
Active area 3.27 inches (W) x 0.74 inches(H)
Keypad
Format 4 key tactile feedback membrane keypad
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Appendix II – Default values
The settings will be configured at the factory for either metric or imperial units. Table 2 lists
the metric default values.
Table 2 System Default Values
Parameter Default Value
Dimensions mm
Flow Rate l/min
Pipe size 50 (mm)
4-20 mA On, 4-20 mA selected
Flow at Max Current Equivalent to 2m/s
Flow at Min Current 0
Pulse Output
On
Volume per Pulse 10 liters
Pulse Width 25 ms
Damping 20 seconds
Calibration Factor 1.000
Zero Cut-off 0.10 m/s
Zero Offset 0.000 l/min
Table 3 lists the default values when Imperial dimensions are selected.
Table 3 System Default Values
Parameter Default Value
Dimensions inches
Flow Rate USgal/min
Pipe size 2 (inches)
4-20 mA On, 4-20 mA selected
Flow at Max Current Equivalent to 6.5 ft/s
Flow at Min Current 0
Pulse Output
On
Volume per Pulse 10 US gallons
Pulse Width 25 ms
Damping 20 seconds
Calibration Factor 1.000
Zero Cut-off 0.10 m/s ( 0.3 ft/s)
Zero Offset 0.000 gal/min