Greyline Portaflow PT400, Руководство пользователя

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3.7 Configuring the Portaflow PT400 Interfaces
3.7.3 How to turn the 4-20mA output OFF/ON
1. With the instrument operating in the FLOW
READING mode, press the 4-20mA function key.
This will access the 4-20mA OUTPUT screen.
2. The ON/OFF status of the 4-20mA output is
shown on line 2 of the display.
3. To change the ON/OFF status select Output
Range and press ENTER.
4-20 mA OUTPUT DD-MM-YY HH:MM:SS
4-20 mA O/P is ON Dim: mm
mA Output Reading : 0.00
Output Range : 4-20
Units : l/min
Flow at max. output : 0.00
Flow at min. output : 0.00
Output mA for error : 22.00
Exit
3.7.3
4. Select Off, to turn OFF the 4-20mA Output or
select one of the output ranges to turn it ON.
5. Press ENTER to return to the 4-20mA
OUTPUT screen.
4-20 mA OUTPUT DD-MM-YY HH:MM:SS
Dim: mm
Off
4-20mA
0-20mA
0-16mA
3.7.4 4-20mA signal calibration and ranging
Key Point:
The 4-20mA output has been calibrated in the factory and should not
require further adjustment. In the rare event that re-calibration is necessary, this
procedure should be carried out only by a trained engineer.
3.7.4
This procedure describes how to calibrate the 4-20mA output and ‘scale’ it to operate over a defined flow-rate
range.
Signal calibration
1. Select Setup Instrument from the MAIN MENU,
to access the SETUP INSTRUMENT screen.
2. Select Calibrate 4-20mA.
SETUP INSTRUMENT DD-MM-YY HH:MM:SS
Dim: mm
Set Date & Time : dd-mm-yy hh:mm:ss
Calibrate 4-20mA
Pulse output
Backlight
: Disabled
Factory settings
Change Language
Exit