Verification Procedure - Hach TL2350 Manuel D'utilisation De Base

13. Open the lid and
remove the vial from
the sample cell holder.

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.
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.
16 English
14. Do steps 7–13 for
the other StablCal vials
(from lowest to highest
NTU standard). When
complete, the
measured values are
shown.
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.
15. If Verify after Cal is
set to on, the value of
the verification standard
shows. Push Read to
measure the verification
standard.
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.
16. Push Store to save
the new calibration
data.
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.