Oval Wheel Meter OI UST1 with Universal Smart Transmitter with HART® Communication0 pages

Oval wheel meters now smart

Oval Wheel Meter OI UST1
with Universal Smart Transmitter
with HART® Communication
Designed for the process :
• direct measurement of volume
resp. of volumetric flowrate
• measurement at high viscosities

• high accuracy
• only 2 moving parts (oval wheels)
• 2-wire-technique

Measuring principle
Oval wheel meters are positive displacement
flowmeters. The measuring element consists of two
meshing precision oval wheels, driven by the fluid.
Each revolution of the oval wheels displaces a
precisely known volume of liquid through the meter.

The number of revolutions therefore is directly
proportional to the measured volume. The pulses
generated by a Wiegand pulse transmitter with high
pulse resolution are processed in the electronic
converter UST1 and converted.

Technical Data
measured error
(accuracy)

repeatability

OI 03, OI 06, OI 1, OI 2:
± 0,3% to ± 1% (depending from flow range and
liquid)
OI 5, OI 10, OI 50, OI 100, OI 200; OI 400:
± 0,1% to ± 0,3% (depending from flow range
and liquid)
0,02 % of measured value

operating
temperature

-25°C to +170 °C

ambient temperature

-10 °C bto +70 °C

electrical connection

sensor supply 14 – 30 VDC
2 - wire – technique, 4-20 mA, HART®
or current pulses ( without HART® )
wetted parts
stainless steel 1.4571
OI03 - OI 2: also in
brass/bronze

materials

safety class

EU declaration of
conformity

electronics housing:
cast aluminium
DMT 99 ATEX E014X EEx ia IIC T6
DMT 99 ATEX E0125X EEx d [ia] IIC/IIB T6
DMT 99 ATEX E0125X EEx de [ia] IIC/IIB T6
acc. to EMV guidelines 89/336/EWG,
92/3/EWG, 93/68 EWG, EN 50081-1,
EN 50082-2, and NAMUR NE 21

DTM-Driver according to FDT-technology 1.2
are available.

Measuring ranges
OI
03
06
1
2
5
10
50
100
200
400

Liquids
lower value
0,2
0,42
1
3
5
10
30
66
70
120

Liter/min
upper value
2
4,2
10
30
50
100
300
660
700
1200