Hanna-instruments PCA 310 Manual do Utilizador descarregar pdf (Página 70)

Allow sulfuric acid to stand in the measuring cell for 15 min-

utes to dissolve any foreign materials adhering to the cell walls.

Wipe the cell interior with a cotton-tipped swab. After wiping,

open the drain port to empty the measuring cell from the clean-

ing solution.

CHANGING MEASURMENT CELL

To change the measuring cell (#7 page 10) with a new one

(HI 70487) in the PCA310 - 330 analyzers, follow the steps:

• Stop the analyser by turning off the main switch.

• Remove the reagent and buffer bottles to free space.

• Disconnect the reagent and buffer tubes from the cell

body.

• Disconnect the sample inlet tube from the cell body. This

tube is between electrovalve (#21 pag 10) and cell.

• Disconnect the drain tube (#8 on page 10) from the cell.

• Unplug the cell connector.

• Unscrew the cell from its support by using hexagonal

wrench.

• Put the new cell in its place and screw it in position. Take

care to position the electrical cable first.

• Reconnect the electrical wires and the pneumatic circuit

as it was at the dismounted cell.

• Power on the PCA310 - 330 analyzer.

• Go to menu mode “Chlorine Menu” - “Cal measuring

Cell” and start the “Calibration Blank” function.

• Confirm by pressing “CFM” when asked “Start the blank

calibration?”.

• Wait for the end of the procedure.

• If the message Press CFM appears, the procedure was

successful and Pressing “CFM” will save the coeficients

for the new cell.

• If the message “failed” appears, the cell is not working

properly. Check the electrical cable connection and if the

error persist call Hanna Service.

• Prime the reagent pump - see page 36 for details.

• Wait 3 cycles for the measurement to stabilize.

• Calibrate the measuring cell as described at page 40.

Note: Before start measuring assure that a stirring bar (HI 70487)

is present in the cell.

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Hanna-instruments PCA 310 Manual do Utilizador Página 70