ABB 4690 - Electrical Calibration Page

4690 Series
Turbidity systems 8 Configuration and Electrical Calibration
IM/4690–EN Rev. A 33
8.6.3 Electrical Calibration Page
In this section the actual values denoted by 'xxxxx' are unimportant and are used only to determine display reading stability when
carrying out the electrical calibration procedure.
Electrical Calibration
Press to advance to next page
or
Press to return to the
Operating page – see Section 6.2.1, page 19.
Calibrate
Select YES to access the electrical calibration sequence.
Select NO to advance to Adjust RTX Zero.
mV Zero1 (0mV)
Set the millivolt source to 0 mV and allow the analyzer display to stabilize.
mV Span1 (3000mV)
Set the millivolt source to 3000 mV and allow the analyzer display to stabilize.
Adjust Retransmission Zero
Set the milliammeter reading to 4 mA.
Adjust Retransmission Span
Set the milliammeter reading to 20 mA.
Note. The retransmission range selected in the
Set Up Outputs page does not affect the reading.
Return to the
Operating page – see Section 6.2.1, page 19.
xxxxx
mV Span1(3000mV)
xxxxx
mV Zero1 (0mV)

Calibrate NO
YES
Adjust RTX Zero

Adjust RTX Span

Yes

ELECTRICAL CAL
Turbidity (FNU)
4517
.
No