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2 System description
266 MODBUS® multivariable transmitter User manual 2105216 Rev. AB
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Input/output specifications
The multivariable transmitter features multiple inputs that include DP, SP, and temperature. The transmitter output is RS-485
MODBUS
®
communication.
Differential pressure input
The transmitter includes a differential pressure input. The specifications are documented in Table 3.
Table 3: Differential pressure specifications
Item
Description
Accuracy4
User calibrate spans from 1:1 to 10:1 (for spans > 10:1, see DS/2101130)
±0.04% (266JST)
±0.075% (266JSH)
Static pressure effect (SPE) to DP
Zero (zero errors can be
calibrated out at line pressure)
Up to 1450 PSI: 0.02% of FCS5
>1450 PSI: 0.02% of FCS
Long term stability
±0.15% of FCS
over a 24 month period
Ambient temperature effect
Between the temperatures of -35 °F to +185 °F
±0.04% of FCS
, ±0.02% of reading
Static pressure effect (SPE) to DP
span
Up to 1450 PSI: 0.02% of reading
>1450 PSI: 0.02% of reading per 1450 PSI
Vibration effect
±1.5 InH
2
O (3.74 mbar) according to IEC 61298-
3 “Field with general application or pipeline with low
vibration”
Static pressure input
The transmitter includes a static pressure input. The specifications are documented in Table 4.
Table 4: Static pressure specifications
Item
Description
Accuracy
User calibrated spans from 1:1 to 10:1 (for spans > 10:1, see DS/2101130)
±0.05% (266JST)
±0.075% (266JSH)
Long term stability
±0.15% of FCS
over a 24 month period
Ambient temperature effect
Between the temperatures of -35 °F and +185 °F
±0.05% of FCS
, ±0.02% of reading
Vibration effect
±0.05 InH
2
O (0.00345 bar) according to IEC 61298-
3 “Field with general application or pipeline with low
vibration”
4
Including linearity, hysteresis, and repeatability at reference conditions
5
FCS is Factory Calibrated Span. This is the pressure range over which the factory thermally calibrated the sensor.
Содержание 266 MODBUS
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