Dwyer UFM - Manual (Page 25)

F - UFM
Issue 1.4 Page 25
10
Appendix I – UFM Specification
Table 1 lists the UFM Product Specification.
General
Measuring Technique Transit time
Measurement channels 1
Timing Resolution ±50 ps
Turn down ratio 200:1
Flow velocity range 0.1 to 10 m/s
Applicable Fluid types Clean water with < 3% by volume of particulate content.
Accuracy ±3% of flow reading for flow rate >0.3 m/s
Repeatability ±0.5% of measured value
Selectable units Velocity: m/s, ft/s
Flow Rate:l/s, l/min, gal/s, gal/min, USgal/s, USgal/min,
m
3 /min, m 3 /hr
Volume: liters, m3, gals, USgals
Languages supported English only
Power input 12 – 24 V ac or dc
Power consumption 7 VA maximum
Cable 5 m screened 6 core
Pulse Output
Output Opto-isolated MOSFET volt free normally open contact.
Isolation 2500V
Pulse width Default value 25 ms; programmable range 3 – 99 ms
Pulse repetition rate Up to 166 pulses/sec (depending on pulse width)
Frequency mode 200 Hz maximum
Maximum load voltage/current 48V AC / 500mA
Current Output
Output 4 – 20 mA
Resolution 0.1% of full scale
Maximum load 620 Ω
Isolation 1500 V opto-isolated
Alarm current 3.5 mA
Enclosure
Material Plastic Polycarbonate
Fixing Pipe mountable
Degree of Protection IP54
Flammability Rating UL94 V-0
Dimensions 10 inches x 2 inches x 3.6 inches (electronics + guide rail)
Weight 1.1 lb
Environmental
Pipe temperature 32°F to 185°F (0°C to 85°C)
Operating temperature (Electronics) 32°F to 122°F (0°C to 50°C )