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31
3.
High-Range Conductivity Calibration
PROCEDURE
DISPLAY
· 100.0 mS Reference Solution
· 90XL Sample Kit
· Make sure a condo/temp sensor module is attached.
After “CALIBRATION” has been entered,
Select 100.0 mS HIGH from the next menu list.
Step 1
- Empty any liquids from the sensor module.
The value of conductivity read internally by the 90XL
must be less than 4 mS to proceed. The factory
calibration value is displayed in this step also.
Step 2
- Rinse the sensor module by drawing
reference solution up through it. The value read
internally must be within 4 mS of the reference value
to proceed to the next step.
Step 3 -
Empty reference solution and discard. The
90XL must detect a value of less than 4 mS to
proceed.
Step 4 -
Draw fresh reference solution slowly
through the sensor module. While reference solution
is flowing, the 90XL must detect 4 stable conductivity
values within 4 mS of the reference to proceed to the
next step.
14.00 mS STANDARD
13.40 mS STANDARD
100.0 mS HIGH
AIR ZERO
SET FACTORY DEFAULTS
CALIBRATION HELP
STEP 1
EMPTY CELL
100 mS CAL
Value must be less than 4 mS
to proceed
FACTORY mS VALUE
“XX.XX” mS
STEP 2
100 mS CAL
DRAW REF. SOLUTION
THROUGH THE CELL
Value must be within 4 mS
of the reference to proceed.
STEP 3
100 mS CAL
EMPTY CELL
DISCARD RINSE
Value must be less than 4 mS
to proceed.
STEP 4
100 mS CAL
SLOWLY DRAW REF. SOL
THROUGH THE CELL
4 stable values within 4 mS
of the reference are required
to proceed.