ABB 2600T EN Series User Manual

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. . . ADDENDUM FOR SELECTABLE OUTPUT FUNCTIONS
3.0 POLYNOMIAL 2 (Two polinomial functions of 2nd order) -
Available for Analog + HART version - Fig. 2b
Analog Output transfer function can also be defined as a two polinomial
function. Both polinomials are of 2nd order. So two different polinomial
functions are used:
Out = [± A
0
+A
1
(x
1
) ± A
2
(x
2
)] + [± B
0
+B
1
(x
1
) ± B
2
(x
2
)]
Here the polinomial with A coefficients is used for X from 0 to a K value,
and the second one with B coefficients for X greater than the K value.
Ax and Bx terms of the polinomials have to be calculated according to
the shape of the vessel.
A PC based software tool is available for polinomial coefficients
definition.
4.0 CONSTANT CURRENT
Available for analog + HART version
This output function, activated by a Configuration Tool, can be used to
test the transmitter output, the integrity of the transmission loop and the
calibration of associated equipment like receivers, recorders, etc.
When this function is activated the transmitter acts like a costant current
generator: using the configuration tool the user can specify a fixed
output current of 4 mA, 20 mA or any value between 4 and 20 mA.
0K1
Polinomial with
B coefficients
Polinomial with
A coefficients
= X
Fig. 2b
TX
2nd polinomial function
1st polinomial
function

ABB 2600T EN Series Specifications

General

Accuracy	±0.075% of span
Process Temperature	-40 to 85 °C (-40 to 185 °F)
Ambient Temperature	-40 to 85 °C (-40 to 185 °F)
Power Supply	10.5 to 45 V DC
Housing Material	Aluminum or Stainless Steel
Type	Pressure Transmitter
Output Signal	4-20 mA HART, PROFIBUS PA, FOUNDATION Fieldbus
Protection Rating	IP66, IP67
Measurement Type	Absolute, gauge, differential pressure
Stability	±0.1% of URL per year
Electrical Connection	M20x1.5, 1/2-14 NPT
Process Connection	1/2" NPT, 1/4" NPT
Certifications	ATEX, IECEx, CSA
Communication Protocol	HART, PROFIBUS PA, FOUNDATION Fieldbus