Balluff BMD 1H Serie Betriebsanleitung Seite 149

Variables in uencing measurement accuracy
Speci cations for the digital measured value
Temperature drift - Digital output
Additional deviation through electromag-
netic interference acc. to EN 61326
Speci cations apply also to the current output
Temperature drift - Current output
Deviation in the current output due to digital/analogue conversion
Non-Ex and Ex-ia version
Ex-d-ia version
Additional deviation through electromag-
netic interference acc. to EN 61326
In uence of the superimposed gas and pressure on measurement accuracy
The propagation speed of the radar impulses in gas or vapour above the medium is reduced by
values refer to the distance. Positive values mean that the measured distance is too large, negative
values that the measured distance is too small.
Gas phase Temperature
Air 20 °C (68 °F)
200 °C (392 °F)
400 °C (752 °F)
Hydrogen 20 °C (68 °F)
200 °C (392 °F)
400 °C (752 °F)
Steam (saturated 100 °C (212 °F)
steam)
180 °C (356 °F)
264 °C (507 °F)
366 °C (691 °F)
Characteristics and performance data
Measuring cycle time
Step response time
9)
Also for the additional current output (optional).
8)
Time span after a sudden measuring distance change by max. 0.5 m in liquid applications, max 2 m with bulk
9)
±3 mm/10 K relating to the max. measuring range or
max. 10 mm (0.394 in)
< ±10 mm (< ±0.394 in)
8)
±0.03 %/10 K relating to the 16 mA span max. ±0.3 %
< ±15 μA
< ±40 μA
< ±150 μA
1 bar (14.5 psig) 10 bar (145 psig)
0 % 0.22 %
-0.01 % 0.13 %
-0.02 % 0.08 %
-0.01 % 0.1 %
-0.02 % 0.05 %
-0.02 % 0.03 %
0.26 % -
0.17 % 2.1 %
0.12 % 1.44 %
0.07 % 1.01 %
< 500 ms
1 m/min
Products with high dielectric constant (>10) up to 5 m/
min.
11 Supplement
Pressure
50 bar (725 psig)
1.2 %
0.74 %
0.52 %
0.61 %
0.37 %
0.25 %
-
-
9.2 %
5.7 %
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