Hach TL2360 Basic User Manual page 17

1. Push Login and
select the applicable
Operator ID. If login
is not necessary, go
to step 3.
5. Apply a small
drop of silicone oil
from the top to the
bottom of the vial.
6.3 Turbidity measurement
For accurate turbidity readings use clean sample cells and remove air bubbles.
6.3.1 Measurement notes
Proper measurement techniques are important in minimizing the effects of instrument variation, stray
light and air bubbles. For accurate and repeatable measurements:
Instrument
• Make sure that the instrument is on a level, stationary surface that is free of vibration during the
measurement.
• Instrument stabilization is immediate. No warm-up time is necessary.
• Always close the sample compartment lid during measurement, calibration and verification.
• Remove the sample cell from the instrument and turn off the instrument if the instrument is stored
for an extended time period (more than a month).
• Keep the sample compartment lid closed to keep dust and dirt out.
Sample cells
• Always cap the sample cell to prevent spillage of the sample into the instrument.
2. Push Login and
enter the password.
Push OK.
6. Use the oiling
cloth to apply the oil
equally to the
surface of the vial.
Remove most of the
oil. Make sure that
the vial is almost dry.
3. Push Verification.
The verification
standard value is
shown. Push
Options>Verification
Setup to change the
value of the
verification standard.
7. Put the vial in the
sample cell holder
with the triangle on
the vial aligned with
the reference mark
on the sample cell
holder. Push the lid
closed until a click is
heard.
4. Clean the Gelex
vials with a soft, lint-
free cloth to remove
water spots and
fingerprints.
8. Push Read. The
value and pass or
fail status shows.
The data is
automatically stored
in the instrument.
English 17