User's Manual

77
11 Supplement
VEGAPULS 69 • 4 … 20 mA/HART - two-wire
47247-EN-170315
1,0 m (3.281 ft)
30 mm (1.181 in)
- 30 mm (- 1.181 in)
0
5 mm (0.197 in)
- 5 mm (- 0.197 in)
1
3
0,15 m (0.49 ft)
2
Fig. 58: Deviation under reference conditions
1 Reference plane
2 Recommended min. distance
3 Measuring range end
Repeatability ≤±1mm
Deviation with bulk solids The values depend to a great extent on the application.
Bindingspecicationsarethusnotpossible.
Variablesinuencingmeasurementaccuracy
Specicationsapplytothedigitalmeasuredvalue
Temperature drift - Digital output ±3mm/10K,max.10mm
Specicationsapplyalsotothecurrentoutput
Temperature drift - Current output ±0.03%/10Krelatingtothe16mAspanmax.±0.3%
Deviation on the current output through analogue/digital conversion
Ʋ Non-Ex and Ex-ia version <±15µA
Ʋ Ex-d-ia version <±40µA
Characteristics and performance data
Measuring frequency W-band(within75-85GHz)
Measuring cycle time approx. 700 ms
Step response time
3)
≤3s
Beam angle
4)
Ʋ Plastic horn antenna 3.5°
Ʋ Metal-jacketed lens antenna 4°
3)
Time span (after a sudden measuring distance change of max. 2 m in bulk solids applications) until the output
signalhastakenon90%ofthenalvalueforthersttime(IEC61298-2).
4)
 Outsidethespeciedbeamangle,theenergyleveloftheradarsignalis50%(-3dB)less.