Specification; Functional Specifications; Measuring Range Limits And Span Limits; Span Limits - ABB 261GS Operating Instruction

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9

Specification

9.1

Functional specifications

9.1.1

Measuring range limits and span limits

Sensor code
C
F
L
D
U
R
V
IMPORTANT (NOTICE)
The measuring range lower limit (LRL) for model 261AS is absolute 0 for all measuring ranges.
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9.1.2

Span limits

Maximum span = measuring range upper limit (URL)
To optimize performance characteristics, it is recommended
that you select the transmitter sensor code with the lowest
turn down ratio.
TURNDOWN = Upper range limit / set span
9.1.3

Zero suppression and elevation

The zero position and span can be set to any value within the
measuring range limits listed in the table if:
— Set span ≥ minimum span
38 IM/261Gx/Ax-EN Rev. 08 | 261Gx, 261Ax
Measuring range upper
limit (URL)
6 kPa
60 mbar
24 inH O
2
40 kPa
400 mbar
160 inH O
2
250 kPa
2500 mbar
1000 inH O
2
1000 kPa
10 bar
145 psi
3000 kPa
30 bar
435 psi
10000 kPa
100 bar
1450 psi
60000 kPa
600 bar
8700 psi
Measuring range lower
limit (LRL)
Model 261GS
-6 kPa
-60 mbar
24 inH O
2
-40 kPa
-400 mbar
-160 inH O
2
0 abs
0 abs
0 abs
0 abs
0 abs
9.1.4

Damping

Configurable time constant between 0 and 60 s.
This is in addition to the sensor response time, and can be
adjusted via the optional LCD indicator, handheld terminal, or
PC user interface.
9.1.5

Warm-up time

Ready for operation as per specifications in less than 10 s with
minimum damping.
9.1.6

Insulation resistance

>100 MΩ at 500 V DC (between terminals and ground).
Minimum measuring span
Model 261GS
Gauge pressure Absolute pressure
0,3 kPa
3 mbar
1,2 inH O
2
2 kPa
20 mbar
8 inH O
2
12,5 kPa
125 mbar
50 inH O
2
50 kPa
500 mbar
7,25 psi
150 kPa
1,5 bar
21,7 psi
500 kPa
5 bar
72,5 psi
3000 kPa
30 bar
435 psi
Model 261AS
0,3 kPa
3 mbar
2,25 mm Hg
2 kPa
20 mbar
15 mm Hg
12,5 kPa
125 mbar
93,8 mm Hg
50 kPa
500 mbar
375 mm Hg
150 kPa
1,5 bar
21,7 psi
500 kPa
5 bar
72,5 psi
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