Green 01381, Руководство пользователя, Страница: 44 / 48

Appendix
44
The display range of the input signal is from 0.0 to 999.9. The input signal can be scaled
freely within this range by editing the minimum and maximum display
( DispMin/DispMax ).
The minimum display is correspondent to a signal of 4 mA.
The maximum display is correspondent to a signal of 20 mA.
Calibration of the analog input signal
The route for calibration of the analog input is Tools menu\Service (Password level 1:
9490)\Analog in/out settings\Analog input 1.
This procedure should usually only be relevant after reloading the factory settings. The
calibration of analog input signal is carried out in one of the following ways:
Option 1: Input of tested values
Select ZeroCalCnt and key in the value according to the ZeroCalCnt value in the
Testing & Configuration Sheet attached to each specific monitor. Press to save.
The screen will automatically come back to the Analog setup Ai01 screen. Then,
Select SpanCalCnt, and key in the value according to the value in the SpanCalCnt
value in the Testing & Configuration Sheet attached to each specific monitor. Press
to save.
Option 2: Manual calibration
Do the manual calibration of analog signal only if the analog signal does not function
properly with the input of the tested values (Option 1).
The manual calibration of analog input signal requires you to go back and forth between
the Analog setup Ai01 screen and the Main Menu.
For zero calibration:
Simulate a current of 4 mA to the analog input terminal.
Select ZeroCalCnt and adjust the value in ZeroCalCnt until value of analog input
Ai01 in the Main display equal to the MinDisp value. Then save the new value of
ZeroCalCnt.
For span calibration:
Simulate a current of 20 mA to the analog input terminal.
Select SpanCalCnt and adjust the value in SpanCalCnt until value of analog input
Ai01 in the Main display equal to the MaxDisp value. Save the new value of Span-
CalCnt.