Emerson Rosemount FCL, Справочное руководство

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2. Remove the sensor from the flow cell. If the process and buffer temperatures are
appreciably different, place the sensor in a container of tap water at the buffer
temperature.
Do not start the calibration until the sensor has reached the buffer temperature.
3. Press MENU .
The main Menu screen appears. The cursor is on Calibrate.
4. Press
ENTER
.
5. Choose the sensor you wish to calibrate.
Sensor 1 is the chlorine sensor. Sensor 2 is the pH sensor.
6. Choose pH.
7. Choose Buffer Cal.
8. Choose Auto.
9. Choose Start Auto Cal.
If you wish to change the stability criteria or the pH buffer list from the default
values, choose Setup instead and go to step 15. The default stability is defined as a
less than 0.02 change in 10 seconds. The default buffer list is Standard. See the
table in
Definitions .
10. Rinse the sensor with water and place it in the first buffer. Be sure the glass bulb and
reference junction are completely submerged. Swirl the sensor.
11. Press ENTER .
Once the pH reading meets the stability requirements, the screen changes to show
the nominal pH of the buffer. The nominal pH is the pH value at 25 °C (77 °F).
12. If the displayed value is not correct, press Up or Down until the correct value is
showing.
13. Press ENTER .
Once the pH reading meets the stability requirements, the screen changes to show
the nominal pH of the buffer.
14. If the displayed value is not correct, press
Up
or
Down
until the correct value is
showing.
15. Press ENTER .
If the calibration is successful, the screen below is displayed for five seconds. The
display then returns to the screen in step 7. If the calibration is not successful, the
existing calibration data is not changed. A screen appears identifying the error (high
slope, low slope, or offset error). For troubleshooting, see
Troubleshooting when no
error message is showing - pH . If you chose setup in Step 9, the screen below
appears.
16. To make a change, move the cursor to the desired line and press
ENTER
.
A screen appears in which the present setting can be edited.
17. Press ENTER to store the change.
18. To return to the main display, press MENU and then EXIT .
Reference Manual Calibrate
00809-0100-3412 May 2019
Rosemount FCL 1056 71