AFRISO SonarFox UST 20, Operating Instructions Manual

Page: 31 / 38

31 AFRISO SonarFox UST 20
19 . Technical specifications
Technical specifications – level meter
Measurement range
1)
UST 20_01
UST 20_11
UST 20_21
UST 20_31
0,15 ... 2 m
0,25 ... 6 m
0,4 ... 10 m
0,5 ... 20 m
Adjustable measuring range (SPAN) min. 200 mm
Supply voltage
UST 20
UST 20_....EX
18 ... 36 V DC
18 ... 30 V DC
Output
UST 20_....01
UST 20_....02
4 ... 20 mA (limit values 3,9 ... 20,5 mA),
HART®
RS-485 with Modbus RTU
Power consumption
UST 20_....01
UST 20_....02
18 ... 36 V DC
18 ... 30 V DC
Resolution
UST 20_ 01, 11
UST 20_ 21
UST 20_ 31
< 1 mm
< 2 mm
< 2,5 mm
Accuracy (within the total range) 0,15 %
Temperature erroor max. 0,04 % / K
Operating frequency
UST 20_ 01
UST 20_ 11
UST 20_ 21
UST 20_ 31
120 kHz
75 kHz
50 kHz
30 kHz
Beam angle (-3 dB)
UST 20_ 01, 21
UST 20_ 11
UST 20_ 31
10°
14°
12°
Operating temperature range
UST 20_ 01, 11
UST 20_ 21, 31
-30 ... 70 °C
-30 ... 60 °C
Short-time temperature stress resistance +90 °C / 1 hour
Maxi. operating pressure (on sensor surface) 0,1 MPa
Sensitivity 3 steps (low – medium – high)
Damping 0 ... 99 s
Measuring period (depending on sensor type) 1 ... 4 s
Rise time ca. 30 s
Additional technical data for Ex proof
2)
– limiting parameters
Ui=30V DC; Ii=132mA; Pi=0,99W;
Ci=370nF; Li=0,9mH
Failure indication
(echo loss, level in dead zone, internal failure)
3)
optional adjustable:
3,75 mA, 22 mA, last measurement value
Process connection
UST 20_ 01
UST 20_ 11
UST 20_ 21
UST 20_ 31
Screw connection G1
Screw connection G 1½
Screw connection G 2¼
Flange, aluminum alloy
Maximal resistance of current output load (U = 24 V DC) R
max
= 270 Ω
4)
1) In case the level of bulk-solid materials is measured, the measurement range is reduced.
2) Permissible pressure range in zone 0 (Version Xi): 80 ... 110 kPa.
3) Dead zone = Blind zone = Blocking distance
4) Including 250 Ω resistor in case of HART® connection.