Calibration, Figure 2 – Hach-Lange ISENa38103 User Manual
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Figure 2 Measurement method
1 Container
3 Filling solution level
2 Probe body
4 Standard solution or sample level
Calibration
Before calibration:
The probe must have the correct service-life time stamp. Set the date and time in the meter before the probe is attached.
It is not necessary to recalibrate when moving a calibrated probe from one HQd meter to another if the additional meter is
configured to use the same calibration options.
To view the current calibration, push , select View Probe Data, then select View Current Calibration.
If any two probes are connected, push the UP or DOWN arrow to change to the single display mode in order to show the
Calibrate option.
Prepare the probe for use (refer to
Calibration notes:
•
Stir the standards and samples at a slow and steady rate to prevent the formation of
a vortex.
•
Additional standard sets along with the minimum number of calibration points can be
selected on the Calibration Options menu.
•
Push Skip to omit a standard from the calibration routine. The display will not show
Skip until the minimum number of standards is met.
•
Begin with the lowest concentration during calibration. This reduces carry-over
contamination to give the best results.
•
For measurements below 1 ppm (10
-5
M), use plastic lab-ware.
•
Note the temperatures of the standards during calibration. Keep temperatures
between calibration standards within ±2 ºC for optimal results.
•
The calibration is recorded in the electrode and the data log. The calibration is also
sent to a PC, printer or flash memory stick if connected.
•
Air bubbles under the sensor tip when submerged can cause slow response or error
in measurement. If bubbles are present, gently shake the probe until bubbles are
removed.
•
If a calibration error occurs, refer to
on page 12.
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