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ITC 450/470
User manual
7.3.5. "inPt" menu (parameters of current and voltage inputs)
this option presets type of the conversion characteristic, and can be set to:
"Lin"
- linear
"Sqr"
- square
"CHAr"
"Sqrt" - square root
"USEr"
- user defined characteristic. Maximal length 20 points. Every point is defined by user. Adding,
Editing and Deleting of points is done by options „AddP", „EdtP", „dELP" („InPt" menu) respectively.
If user defined characteristic is selected, and if number of defined points is lower than 2 then warning
"Errc" is displayed in measurement mode.
The process of displayed result calculation is described in details in DISPLAY VALUES CALCULATION paragraph.
- decimal point position. It can be set to one of:
"Pnt"
"0", "0.0", "0.00", "0.000"
Decimal point position is changed by [^] , [v] buttons.
These parameters describe the values displayed for minimum and maximum input current. For example, if input
type is set to 4-20 mA "Lo C" parameter defines the value displayed when input current is equal 4 mA, and "Hi C"
"Lo C"
"Hi C"
parameter defines the value displayed for 20 mA of input current. Available range for these parameters:
-999 ÷ 9999. Negative values can be set by entering '-' sign on the first position (by use of [^] , [v] buttons).
If user defined characteristic is selected (parameter "CHAr" = "USEr") the parameters „Lo C" and
„Hi C" are not available for modification, due to their values are calculated from defined
characteristic.
- this menu allow user to add single point to the user defined characteristic.
After selection of this option device waits for „X" and „Y" coordinates of new point. Modification of the
coordinates is done accordingly to numerical parameters edition. Coordinate „X" defines the percentage ratio of
"AddP"
input current to selected current range. The „X" range: -99,9 ÷ 199,9. Coordinate „Y" defines displayed value for
particular „X" value. The „Y" value can be changed in range: -999 ÷ 9999, decimal point position depend on
„Pnt" parameter (menu "inPt ").
• User can not enter two points with the same value of „X" coordinate. If user trays to do it, "Err"
warning is displayed. To modify any defined point use "EdtP" option.
• To distinguish „X" and „Y" coordinates, if „X" coordinate is displayed an additional decimal point on
utmost right position is displayed.
• If user defined characteristic is selected, and if number of defined points is lower than 2 then
warning "Errc" is displayed in measurement mode.
}
When one of those characteristics is chosen display range is defined
by "Lo C" and "Hi C".
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