Ametek JOFRA IPI Manuale di regolazione - Pagina 3
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When a function is "locked, it cannot be accessed or changed from
its current state. To change a locked function, enter the supervisory
mode, and unlock the function. Once it is changed, you may enter
supervisory mode to lock access again.
5. Setting a custom engineering unit or scale: The last menu choice in
supervisory mode is SET FACTR. This allows you to set a
multiplier factor from 0.001 to 100, creating a custom scale. The set
factor will be multiplied by the psi measured, the result will be
displayed.
For example: 40 psi is the equivalent of 1000 lbs of product in a
tank. You want to display the product weight , using a 100 psi
range indicator. By setting a factor of 25, a 40 PSI pressure would
display as 1000 (40 x 25). The engineering unit displayed on the IPI
will be "Cust".
Overview
Calibration adjustment of the IPI is performed electronically via internal
software with the case closed. There are no mechanical adjustments;
all calibration commands and adjustments are done via the keypad,
using the display to guide the user through the calibration process.
Eight calibration points are used in the adjustment program, working
from full scale to zero at pressures equaling 100%, 87.5%, 75%, 62.5%,
50%, 37.5%, 25%, 12.5%, and 0% of full scale plus vacuum.
Note: This is an ambient temperature calibration, and should be
performed at an ambient temperature of 23º C ± 3º C (72 º F ± 5º F).
Calibration outside this temperature range will invalidate the
temperature compensation program in the IPI.
IPI Calibration Procedure