XITRON 2000I, Руководство пользователя

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Operating the 2000 Instrument 37
Calculating Output Mode of Operation
The 2000I and 2000M DC power source instruments have the capacity to
compute the actual output level from an
equation entered in the specific data
units of the instrument being calibrated. For example, a process controller’s
4 – 20mA input scaled to yield a 50 to 150psi range of pressure indications.
Further examples of the use of this feature are given in the
Applications
chapter.
Initiating and Setting-Up the Calculated Output Mode of
Operation
The sequence of key presses required to initiate the “Calculated Output”
mode of operation is as described below:
1. Press the MNU key, the display will then prompt you for selection of
either the “Standby” or “Operate” state as described previously in this
chapter.
2. Since neither “Standby” nor “Operate” are desired, press an arrow key
until the “Calculated Output” action is displayed:
< Calculated >
3. Then press any of the Units/Enter keys (V, A, ºC or ºF
)
to select this
action.
4. The equation used by the 2000 instruments to calculate the actual output
level is formed by a straight line passing through two points, which you
define. These two points (called A and B) may be in any order—
ascending or descending—and simply require the entry of the actual
output level and the equivalent
user entry level at each of these points.
5. The display then prompts you to enter Output A (i.e., the actual output
level for point A), and displays the presently stored data. Press the
corresponding units key (if this data is to be retained) or enter the desired
data and units.
6. The display then prompts you to enter User Data A and displays the
presently stored data. Press any units key (if this data is to be retained) or
enter the desired data and then press any units key.