Hach TL2360 Basic User Manual page 16

5. Apply a small
drop of silicone oil
from the top to the
bottom of the vial.
9. Push Read. Wait
1 minute for the
instrument to
complete the
measurement.
13. Push Store to
save the new
calibration data.
6.2.5 Verification procedure
Use the verification procedure to measure the same Gelex or StablCal vial at regular intervals to
determine if the reading stays within the acceptance range. Use the Verification Setup menu to set a
reminder for the verification.
16 English
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.
10. Open the lid and
remove the vial from
the sample cell
holder.
7. Carefully and
slowly invert the vial
to fully mix the
standard (do not
invert the <0.1 NTU
vial). Be careful not
to add air bubbles.
11. Do steps 4–10
for the other
StablCal vials (from
lowest to highest
NTU standard).
When complete, the
measured values are
shown.
8. 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.
12. If Verify after
Cal is set to on, the
value of the
verification standard
shows. Push Read
to measure the
verification standard.