ABB 4670 Series User Manual page 23

...5.2.2 Calibration Page
Formazine Standard (wet) Calibration – see also Section 7.3.1.
– – – – –
SENSOR CAL.
0 0 0 0 0
Cal. User Code
0 0 0 0 0
Formazine Std.
DRY CAL. STD.
0 0 0
.
Zero Calibration
– – – – –
Calibrating Zero
1 2 0
.
Fill Span Sol.
– – – – –
Calibrating Span
– – – – –
Cal. Complete
0 0 0 0 0
SECURITY CODE
Model 7997 200 Series
Enter the required calibration code number, between 00000 and 19999. If an incorrect value
is entered, access to calibration is prevented and the Calibration Page is displayed.
Select Formazine
Std. by pressing
the key.
Command to insert Dry
Calibration Standard Cell with
blank face towards the
receiver.
After one of these actions, press
Displayed for approximately
one minute, after which the
sequence changes to
Fill Span Sol.
Use the
Remove Dry Calibration
Standard and fill the inner
chamber with the Span
Solution.
Press
Press immediately to advance to Cal. Complete, if span calibration is not required.
Displayed for approximately a minute, after which the sequence changes to
– – – – –
Calibration Fail
Advance to Access to Secure Parameters – Section 6.1.
Model 7997 300
–––––– Advance to next parameter. ––––––
Calibration Access
–––––– Formazine (wet) Standard ––––––
Select Formazine
Std. by pressing
the
–––––– Zero Calibration ––––––
Command to fill chamber
with demineralized water.
. The display changes to Calibrating Zero.
–––––– Calibrating Zero ––––––
Displayed for approximately
one minute, after which the
sequence changes to
Fill Span Sol.
––– Span using Formazine Standard. –––
or keys to set the value of the span solution being used.
Drain and fill with the Span
Solution
. The display changes to Calibrating Span.
–––––– Calibrating Span ––––––
Cal. Complete (Calibration completed).
Cal. Complete
Calibration is now complete.
5 START UP AND OPERATION
Model 7997 400 Series
Select Formazine
Std. by pressing
key.
the
Command to immerse the
sensor in de-mineralized
Displayed for approximately
one minute, after which the
sequence changes to
Immerse Fill Span Sol.
Remove system from
demineralized water and
immerse in the span solution.
Cal. Fail
Cal Fail indicates that the expected
step change between a zero and span
calibration was not produced by the
sensor. Check the Dry Standard,
calibration solutions, and repeat the
procedure.
key.
water.
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