VEGA VEGABAR 81 Modbus and Levelmaster protocol - Operating Instructions User Manual
Page 59
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10 Supplement
VEGABAR 81 • Modbus and Levelmaster protocol
46293-EN-131107
Average temperature coefficient,
zero signal
In the compensated tem-
perature range 10 … +70 °C
(+50 … +158 °F)
Outside the compensated tem-
perature range
Turn down 1 : 1 up to 5 : 1
< 0.1 %/10 K
-
Turn down up to 10 : 1
< 0.15 %/10 K
-
Additional temperature influence through chemical seal
The specifications refer to diaphragm material 316L as well as isolating liquid silicone oil. They are
only used for estimation. The actual values depend on the diameter, material and strength of the
diaphragm as well as the isolating liquid. They are available on request.
Temperature coefficient of the chemical seal in mbar/10 K with
Ʋ Flange DN 50 PN 40, Form C,
DIN 2501
1.2 mbar/10 K
Ʋ Flange DN 80 PN 40, Form C,
DIN 2501
0.25 mbar/10 K
Ʋ Flange DN 80 PN 40, Form C,
DIN 2501 with extension 50 mm
1.34 mbar/10 K
Ʋ Flange 2" 150 lbs RF, ANSI B16.5
1.2 mbar/10 K
Ʋ Flange 3" 150 lbs RF, ANSI B16.5
0.25 mbar/10 K
Ʋ Flange 3" 150 lbs RF, ANSI B16.5 with
extension 2 "
1.34 mbar/10 K
Temperature coefficient of a cooling ele-
ment, depending on the diaphragm-ø
0.1 … 1.5 mbar/10 K
Temperature coefficient of a 1 m
long capillary line, depending on the
diaphragm-ø
0.1 … 15 mbar/10 K
Long-term stability (according to DIN 16086 and IEC 60770-1)
Turn down (TD) is the relation nominal measuring range/adjusted span.
Long-term drift of the zero signal
2)
< (0.1 % x TD)/year
Ambient conditions
Version
Ambient temperature
Storage and transport temper-
ature
Standard version
-40 … +80 °C (-40 … +176 °F)
-60 … +80 °C (-76 … +176 °F)
Version IP 66/IP 68 (1 bar)
-20 … +80 °C (-4 … +176 °F)
-20 … +80 °C (-4 … +176 °F)
Version IP 68 (25 bar) with connec-
tion cable PUR
-20 … +80 °C (-4 … +176 °F)
-20 … +80 °C (-4 … +176 °F)
Version IP 68 (25 bar), connection
cable PE
-20 … +60 °C (-4 … +140 °F)
-20 … +60 °C (-4 … +140 °F)
Process conditions
Product temperature depending on isolating liquid and instrument version
2)
Depending on which chemical seal is used, the values can also be higher.