Simulator (X-51) Mode - Horiba Scientific LAQUA F-73A-S Instruction Manual

Result data output
When all the check is completed, the result is outputted automatically.
● OK/CHECK judge
Electrode: OK (satisfies regulation requirements)
CHECK (does not satisfy regulation requirements)
● Calibrated value for each standard solution of pH7, 4, or 9, potential, and temperature.
● Asymmetric potential (within regulated value ±30 mV)
● Sensitivity pH4 to 7 (90% to 105% of regulated value)
pH7 to 9 (90% to 105% of regulated value)
● Repeatability (within regulated value ±0.05pH)
The repeatability shows the difference between maximum and minimum results given
by 5 measurements using the standard solution of pH7.
To insure accuracy in the measurement;
・ Use Type 1 for the pH standard solution.
・ Keep the temperature within ±0.2C using a temperature controlled bath.
・ Set the temperature in the temperature controlled bath to room temperature (25C) or
equivalent.
・ Perform light stirring use the electrode stand and a stirrer to stir samples lightly.
・ Hold a measured value after it completely stabilizes.
HINT!
It takes 3 minutes to 10 minutes for measurement values to stabilize since the electrode is
immersed into the standard solution.
● When an electrode is defective
If the check result is wrong even in the above operations, try following countermeasures.
・ Clean the electrode.
・ Check the used standard solutions are right.
・ Check if the electrode is deteriorated, and replace with new one if necessary.

8.1.4 Simulator (X-51) Mode

Input the results given by the optional pH checker, X-51 to the meter, and perform
functional check.
For detailed operation, refer to the instruction manual for the pH checker X-51.
1.
Set the resolution to 0.001 pH in the pH SETUP screen.
2.
Set the temperature compensation to ATC.
3.
According to the operation guide, perform functional check as calibration by the standard
solutions of pH7, pH4 in the following order.
(1) Calibration by standard solutions
pH6.865
pH4.008
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