68
ULM.0.01.000RE_10_08_20
Mechanical durability
10,000,000 trips
Electrical durability, at rated load, min-
imum (standard)
50,000 (100,000) trips
Device performance parameters
Absolute measurement error
1 mm max for ULM-31-HF, ULM-31-
HF-F;
3 mm max for ULM-31A1, ULM-31A1-
HF and ULM-31A1-HF-F.
5 mm max for ULM-31A1-HF-F-LC
Measurement range
0.6 m to 50 m
Reduced accuracy measurement range
0.3 m to 0.6 m
Operating principle
Radar type instrument for level meas-
urement using linear frequency modula-
tion (FMCW)
Working frequency
1
125±5 GHz
Output power
8 mW max
Antenna beamwidth
2˚ - ULM-31-HF, ULM-31A1-HF;
5˚ - ULM-31-HF-F, ULM-31A1-HF-F,
ULM-31A1-HF-F-LC;
9˚ - ULM-31А1.
Operating conditions
Ambient temperature at the transmitter
installation location
-40°C to +50°C
At transmitter flange temperature above
50°C
Radio-transparent insulating spacer in-
stallation is required, see para. 12.5
Atmospheric pressure
84.0 kPa to 106.7 kPa (630-800 mmHg)
Relative humidity at the transmitter in-
stallation location
Not more than 95% at 35ºC and below
without condensation
Positive or negative pressure in vessel
-1 bar to 6 bar, radio-transparent sealing
spacer installation is required see pa-
ra. 12.5
Mechanical impact
- vibration amplitude
- frequency
0.1 mm max
5 Hz to 25 Hz
Maximum angle of working position de-
viation from vertical
1 degree
Protection
Dust and moisture ingress protection
grade
IP65
Design
General purpose industrial design (non-
explosion-proof)
1
Makes about 24GHz for the ULM-31А1 level transmitter
