Vega POINTRAC 31 - Page 55

55
11 Supplement
POINTRAC 31 • 8/16 mA/HART - four-wire
43388-EN-180322
Switching voltage
Ʋ Min. 10 mV
Ʋ Max. 253 V AC, 253 V DC
Switching current
Ʋ Min. 10 µA
Ʋ Max. 3 A AC, 1 A DC
Breaking capacity
Ʋ Min. 50 mW
Ʋ Max. 750 VA AC, 40 W DC
If inductive loads or stronger currents are switched
through, the gold plating on the relay contact surface will
be permanently damaged. The contact is then no longer
suitable for switching low-level signal circuits.
Contact material (relay contacts) AgNi or AgSnO and Au plated
Accuracy (according to DIN EN 60770-1)
Process reference conditions according to DIN EN 61298-1
Ʋ Temperature +18 … +30 °C (+64 … +86 °F)
Ʋ Relative humidity 45 … 75 %
Ʋ Air pressure 860 … 1060 mbar/86 … 106 kPa (12.5 … 15.4 psig)
Repeatability ≤0.5%
Deviation with bulk solids The values depend to a great extent on the application.
Bindingspecicationsarethusnotpossible.
DeviationunderEMCinuence ≤1%
Variablesinuencingmeasurementaccuracy
Specicationsapplyalsotothecurrentoutput
Temperature drift - Current output ±0.03 %/10 K relating to the 16 mA span or max. ±0.3 %
Deviation in the current output due to
analogue/digital conversion
<±15 µA
Deviation on the current output due to
strong, high frequency electromagnetic
interference acc. to EN 61326
<±150 µA
Ambient conditions
Storage and transport temperature
-40 … +60 °C (-40 … +140 °F)
Process conditions
Fortheprocessconditions,pleasealsonotethespecicationsonthetypelabel.Thelowervalue
always applies.
Process pressure Unpressurized
Process temperature (measured on the
detector tube)
-40 … +60 °C (-40 … +140 °F)
With temperatures of more than 60 °C we recommend
the use of water cooling