Burkert 8137 Manuel D'instructions page 43

All manuals and user guides at all-guides.com
Damping (63 % of the input variable)
Fulfilled NAMUR recommendations
Input variable
Measured value
Min. distance from antenna end
Recommended meas. range depending on the antenna diameter
ø 40 mm (1.575 in)
-
ø 48 mm (1.89 in)
-
ø 75 mm (2.953 in), ø 95 mm (3.74 in),
-
parabolic antenna
Max. measuring range
Reference conditions to measuring accuracy (similar to DIN EN 60770-1)
Reference conditions according to DIN EN 61298-1
Temperature
-
Relative humidity
-
Air pressure
-
Other reference conditions
Reflector
-
False reflections
-
Characteristics and performance data
Frequency
Meas. interval approx.
Beam angle 3 dB with horn antenna, depending on antenna diameter
ø 40 mm (1.575 in)
-
ø 48 mm (1.89 in)
-
ø 75 mm (2.953 in)
-
ø 95 mm (3.74 in)
-
Beam angle 3 dB with parabolic antenna
-
Step response or adjustment time
Max. level change
LEVEL TRANSMITTER 8137 • 4 ... 20 mA/HART
0 ... 999 s, adjustable
NE 43
distance between process fitting and product sur-
face
50 mm (1.969 in)
up to 10 m (32.81 ft)
up to 15 m (49.21 ft)
up to 30 m (98.43 ft)
up to 35 m (114.83 ft)
+18 ... +30 °C (+64 ... +86 °F)
45 ... 75 %
860 ... 1060 mbar/86 ... 106 kPa (12.5 ... 15.4 psig)
ideal reflector, e.g. metal plate 2 x 2 m
Biggest false echo, 20 dB smaller than the useful
echo
K-band (26 GHz technology)
1 s
22°
18°
10°
8°
4°
< 1 s (dependent on the parameter settings)
3)
Adjustable up to 1 m/min. (dependent on the
parameter adjustment)
Time to output the correct level (with max. 10 % deviation) after a sudden
3)
level change.
10 Supplement
43