ABB ADS420 Operating Instruction page 10

10
...3 Calibration
...2-Point calibration (100 % and 0 % saturation)
8 Use the
/ keys to select the probe to be calibrated and
key (below the Select prompt).
press the
The Calibration Type page is displayed:
S1: DO
Calibration Type
2-Point Cal
Next
9 If 2-Point Cal is displayed, go to step 11.
If 2-Point Cal is not displayed, press the
Edit prompt).
The Calibration Type selection page is displayed:
Calibration Type
1-Point Cal
2-Point Cal
Cancel
10 Use the / keys to select 2-Point Cal and press the
key (below the OK prompt).
The Calibration Type page is displayed:
S1: DO
Calibration Type
2-Point Cal
Next
11 Press the key below the Next prompt).
The Calibrate/Start Span Cal? page is displayed:
Calibrate
Start Span Cal ?
Place in 100 % Sat
Abort Continue
A D S 4 2 0 | D I S S O LV E D OX YG E N P R O B E | O I/A D S 4 2 0 - E N R E V. A
Edit
key (below the
OK
Edit
12 Press the key (below the Continue prompt).
The Calibrate page is displayed:
Calibrate
PV 98.26 %
Tmp 25.22 °C
Setting-Please Wait
Abort
13 When span calibration is complete, the Calibrate/Start Zero
Cal? page is displayed:
Calibrate
Start Zero Cal?
Place in 0 % Sat
Continue
Abort
14 Remove the sponge wafer from the calibration pot.
15 Fill calibration chamber with fresh sodium sulphite solution,
leaving at least 13 mm (0.5 in) between the surface of the
sensing element and the bottom of the chamber.
16 Allow 5 to 10 minutes for temperature stabilization prior to
continuing the calibration procedure.
17 Press the key (below the Continue prompt).
The Calibrate page is displayed:
Calibrate
PV 2.31 %
Tmp 25.32 °C
Setting-Please Wait
Abort