Electrical Calibration Page - ABB 4670 Series User Manual

...6 PROGRAMMING & ELECTRICAL CALIBRATION

6.7 Electrical Calibration Page

In this section the actual values denoted by 'xxxxx' are unimportant and are used to determine display reading stability when carrying
out the electrical calibration procedure.
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ELECTRICAL CAL
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Calibrate YES
NO
Yes
No
Advance to
Adjust RTX Zero
x x x x x
mV Zero1 (0mV)
x x x x x
mV Span1(3000mV)
x x x x x
mV Zero2 (0mV)
x x x x x
mV Span2(4000mV)
— — — — —
Adjust RTX Zero
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Adjust RTX Span
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Turbidity
28
Electrical Calibration
Select YES to access the electrical calibration sequence. Select NO to advance to
.
RTX Zero
Millivolt Zero (7997 200 Series, 7997 300)
Set the millivolt source to 0 mV and allow the instrument display to stabilize.
Millivolt Span (7997 200 Series, 7997 300)
Set the millivolt source to +3000 mV and allow the instrument display to stabilize.
Millivolt Zero (7997 400 Series)
Set the millivolt source to 0 mV and allow the instrument display to stabilize.
Millivolt Span (7997 400 Series)
Set the millivolt source to +4000 mV and allow the instrument display to stabilize.
Note. Retransmission adjustment is achieved using 4 to 20 mA. The correct values for 0 to
20 and 0 to 10 mA will then be derived automatically.
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
reading.
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Operating Page
0 . 6 0
(NTU)
Set Up Outputs Page
.
Adjust
does not affect the