Total Performance; Technical Specification; Materials; Calibration - ABB 261GS Operating Instruction

9.3.12 Total performance

Similar to DIN 16086
In the range -10 ... 60 °C (14 ... 140 °F):
0.42% of the set span (TD 1:1)
The total performance accuracy includes the measuring error
(non-linearity including hysteresis and non-reproducibility), as
well as the thermal change in the ambient temperature as
regards the zero signal and span.
2
  
E E E E
(   )
perf TS TS lin
1 2
E = Base accuracy
perf
E = Effect of the ambient temperature on the URL
ΔTS1
E = Effect of the ambient temperature on the measuring
ΔTS2
span
E = Measuring error (for setting cut-off point)
lin
9.4

Technical specification

(Please refer to the order information to check the availability
of different versions of the relevant model)
9.4.1

Materials

Process separation diaphragms
Hastelloy C276, Hastelloy C276 gold plated,
Stainless steel (1.4435 / 316L)
1
Process connection
Stainless steel (1.4404 / 316L)
Sensor filling fluid
Silicone oil, inert fill (fluorocarbon), white oil (FDA)
Mounting bracket
Stainless steel
Sensor housing, electronics housing and cover
Stainless steel (1.4404 / 316L)
Filter for atmospheric ventilation
Filter housing: plastic (standard), stainless steel (code EA, AB)
Filter material: polyamide (PA)
Viewing window in cover (LCD display)
Polycarbonate, Makrolon 6557
Cover O-ring
EPDM
Plates
Plastic data plate attached to the electronics housing
1 Wetted parts of the transmitter.
2
1
9.4.2

Calibration

Standard:
— 0 to upper range limit (URL)
Optional:
— To specified measuring span
9.4.3

Optional extras

Mounting bracket
For vertical and horizontal 60 mm (2 in.) pipes or wall
mounting
LCD display
Can be rotated in 90° increments into 4 positions
Additional tag plates
Code I2: For measuring point tag (up to 30 characters) and
calibration specifications (up to 30 characters: lower and
upper value plus unit), attached to transmitter housing.
Code I1: For customer data (4 lines with 30 characters each),
attached to transmitter housing with wire.
Cleaning stage for oxygen applications (O2)
Certificates (test, design, characteristics, material
traceability )
Name plate and operating instruction language
Communication plug connectors
9.4.4

Process connections

1/2-14 NPT female or male thread, DIN EN 837-1 G 1/2 B or
G 1/2 B (HP) for convex seal, flush diaphragm, for installation
in ball valve.
261Gx, 261Ax | IM/261Gx/Ax-EN Rev. 08 41