wtw pHotoFlex, Руководство по эксплуатации

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Operation pHotoFlex / pHotoFlex Turb
64 ba75491e05 04/2009
Measuring
Note
To keep the drift as low as possible, the time for aligning the cell while
pressing and holding the <START/ENTER> key is limited to 30 sec-
onds. After this time, the meter automatically starts measuring or cali-
brating.
1 Press the <M> key (long pressure) repeatedly until the Turbid-
ity measuring mode is selected.
2 Rinse out a clean cell with the sample to be measured:
Pour approximately 10 ml sample into the cell. Close the cell
and rotate it several times before throwing the sample away.
3 Repeat the rinsing procedure twice more.
4 Fill the cell with the sample to be measured (approx. 15 ml).
Close the cell with the black light protection cap.
5 Clean the cell (see section 5.2.2).
6 Insert the cell (see section 4.2).
7 Align the cell:
z
Marked cell
– Align the marking on the cell cap with the marking on the
cell shaft.
– Press and for a short time hold the <START/ENTER>
key until the measured value is displayed.
z
Unmarked cell (see page 62)
– Press and hold the <START/ENTER> key.
– Slowly and in small steps turn the cell by one complete
rotation (by 360 °). After each step wait for a short time
until the displayed measured value is stable.
– Turn the cell back to the position with the lowest mea-
sured value.
8 Release the <START/ENTER> key.
Measurement starts. The measured value is displayed.
Turbidity
157.0
FNU
NTU
01.02.05 15:12