Vega WEIGHTRAC 31 Operating Instructions Manual page 67

Transistor output
Output
Load current
Voltage loss
Switching voltage
Blocking current
Accuracy (according to DIN EN 60770-1)
Process reference conditions according to DIN EN 61298-1
Ʋ Temperature
Ʋ Relative humidity
Ʋ Air pressure
Repeatability
Deviation with bulk solids
Deviation under EMC influence
Variables influencing measurement accuracy
Specifications apply also to the current output
Temperature drift - Current output
Deviation on the current output through
analogue/digital conversion
Deviation on the current output due to
strong, high frequency electromagnetic
interference acc. to EN 61326
Characteristics and performance data
Step response time
4)
Ambient conditions
Ambient, storage and transport tempera-
ture
Process conditions
For the process conditions, please also note the specifications on the type label. The lower value
always applies.
Process pressure
Process temperature (measured on the
detector tube)
Vibration resistance - sensor
Vibration resistance - mounted in the
measuring frame
Time span after a sudden measuring distance change by max. 0.5 m in liquid applications, max 2 m with bulk
4)
solids applications, until the output signal has taken for the first time 90 % of the final value (IEC 61298-2).
Tested according to the guidelines of German Lloyd, GL directive 2.
5)
WEIGHTRAC 31 • 4 ... 20 mA/HART - four-wire
Floating transistor output, permanently shortcircuit-proof
< 400 mA
< 1 V
< 55 V DC
< 10 µA
+18 ... +30 °C (+64 ... +86 °F)
45 ... 75 %
860 ... 1060 mbar/86 ... 106 kPa (12.5 ... 15.4 psig)
1 % of the measuring range end value
The values depend on the quality of the linearization
≤ 1 %
±0.03 %/10 K relating to the 16 mA span max. ±0.3 %
<±15 µA
<±150 µA
≤ 5 s (with damping 1 s)
-40 ... +60 °C (-40 ... +140 °F)
Unpressurized
-40 ... +60 °C (-40 ... +140 °F)
mechanical vibrations up to 1 g in the frequency range
5)
5 ... 200 Hz
mechanical vibrations up to 1 g in the frequency range
5 ... 200 Hz
10 Supplement
67