Hach LZY904.98.00002 Instructions D'utilisation page 21

4.2 Do a calibration verification with a sealed vial or glass rod
Use the optional calibration lid and a sealed-vial 10-NTU StablCal standard to do a primary
calibration verification. As an alternative, use the optional calibration lid and the optional glass
verification rod (< 0.1 NTU) to do a secondary calibration verification.
1. Push menu. Select
SENSOR SETUP>
TU5x00 sc>
VERIFICATION>
SETUP>MENU
GUIDED> SEALED
VIAL.
5. If the verification
standard is a liquid
standard, carefully
invert the verification
standard vial a
minimum of three times.
2. Select SENSOR
SETUP> TU5x00 sc>
VERIFICATION>
START.
6. Clean and dry the
verification standard
vial with a no-lint cloth.
Refer to Prevent vial
contamination
on page 16.
3. Remove the process
head (or the automatic
cleaning module). Refer
to Installation
on page 3. Press
ENTER.
7. Put the vial in the
vial compartment.
4. If the verification
standard value that
shows on the display is
not correct, enter the
accurate turbidity value
of the verification
standard from the
certificate of analysis
for the sealed-vial
StablCal standard or
from the last recorded
value from the
<0.1 NTU glass rod.
If the verification
standard value that
shows on the display is
correct, push confirm.
The status indicator
light flashes blue.
8. Install the calibration
lid. Make sure that the
calibration lid is in the
closed position. Refer
to Installation
on page 3.
English 21