Vega VEGABAR 67 4 … 20 mA_HART Bedienungsanleitung PDF herunterladen (Seite 55)

10 Supplement

VEGABAR 67 • 4 ... 20 mA/HART

36742-EN-130321

Weight approx.

Ʋ Basic weight 0.7 kg (1.543 lbs)

Ʋ Suspension cable 0.1 kg/m (0.07 lbs/ft)

Ʋ Connection tube 1.5 kg/m (1 lbs/ft)

Ʋ Straining clamp 0.2 kg (0.441 lbs)

Ʋ Threadedtting 0.4 kg (0.882 lbs)

Lengths

Ʋ Connection tube 0.25 … 6 m (0.82 … 19.69 ft)

Output variable

Output signal

4 … 20 mA/HART

HART output values according to HART standard 5.0

Ʋ Primary Value Pressure

Ʋ Secondary Value Temperature

11)

Signal resolution 1.6 µA

Failure signal current output (adjustable) mA-value unchanged 20.5 mA, 22 mA, < 3.6 mA

Max. output current 22 mA

Load see load diagram under Power supply

MetNAMURrecommendation NE 43

Dynamic behaviour output

Run-up time approx.

10 s

90 %

100 %

10 %

Fig. 32: Sudden change of the process variable. t

: dead time; t

: rise time; t

: jump response time

1 Process variable

2 Output signal

Dead time ≤150ms

Rise time ≤100ms(10…90%)

Step response time ≤250ms(ti:0s,10…90%)

Damping (63 % of the input variable) 0 … 999 s, adjustable

11)

Dependingontherespectiveinstrumentandtheprocesstting,thetemperaturecandeviatefromthereal

process temperature.

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Vega VEGABAR 67 4 … 20 mA_HART Bedienungsanleitung Seite 55