GE Valve Software Tools MN-Valvue-FF-IOM Service Manual Page 113

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97
Characterization Frame
Configuration Services
Equal percent (50:1) Equal percentage with rangeability of 50 to 1. For equal incre-
ments of input, the valve position has equal percentage
changes of current valve position. Equal percent characteristics
are modified to close the valve at 0% input signal (Air to Open)
or at 100% input signal (Air to Close). This is the default choice
for an equal percentage characteristic.
Equal percent (30:1) Equal percentage with rangeability of 30 to 1. For equal incre-
ments of the input, the valve position has equal percentage
changes of current valve position. Equal percent is the choice
for an equal percentage characteristic when a slightly lower
gain is needed at the upper portion of a range.
Quick open The quick opening characterization is the inverse of the Equal
percent(50:1) characterization curve.
Camflex Percentage Selecting the Camflex option characterizes the valve as if it
were a Masoneilan Camflex valve with settings of Linear and
Equal 50%.
Define This activates the Customize button for a custom characteriza-
tion, which defines the relationship between the input signal
and the output position of the valve. Selecting this option dis-
plays an additional window where you can configure a charac-
terization curve with ten adjustable segments. The curve has up
to nine adjustable points and points in between are linearly
interpolated.
Table 9 Characteristic Choice
Valve Type and Built-in
Characteristic
Desired Installed Valve
and Positioner
Characteristic
Customary Positioner
Characteristic
Non-Standard
Characteristic-Not
Recommended
Camflex
Linear LINEAR EQUAL30, EQUAL50,
Quick opening
Equal percentage EQUAL50 EQUAL30, Quick opening
Varimax
Linear LINEAR EQUAL30, EQUAL50,
Quick opening
Equal percentage EQUAL50-CAMFXEQ
(use when replacing a
4700E)
EQUAL30, Quick opening
21000 series Model #
21X1X or 41000 series
Model # 41X1X with
LINEAR TRIM
Linear LINEAR EQUAL30, EQUAL50,
Quick opening
Equal percentage EQUAL50 EQUAL30, Quick opening
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