10
NaCl calibration is a one-point procedure at 100.0% NaCl. Use the
HI 7037L calibration solution (sea water solution) as a 100% NaCl
standard solution.
To enter NaCl calibration select the NaCl range and
press CAL.
Rinse the probe with some of the calibration solution or
deionized water. Immerse the probe into HI 7037L
solution. The sleeve holes must be completely submerged.
Tap the probe repeatedly to remove any air bubbles
that may be trapped inside the sleeve.
Select the desired value with the ARROW keys, if necessary.
When the reading is stable, “CFM” tag starts blinking on the LCD, asking for
confirmation. Press CFM to confirm calibration.
The instrument displays the “Stor Good” message and returns to measurement mode.
Notes:
• If the uncalibrated reading is too far from the expected value or the
temperature value is out of 0 – 60 ºC range, calibration is not recognized.
The “CFM” tag does not appear; the “~” and “BUF” tags blink to signal
wrong or contaminated calibration solution. If the temperature value is out
of 0 – 60 ºC range, the “ºC” tag will also be displayed blinking on the LCD.
• For best results choose an EC buffer value close to the sample to be measured.
• In order to minimize any EMC interferences, use plastic beakers.
• The meter uses 1.90 %/°C compensation factor during calibration. If
the setup item “tc” has been set to a different value, when exiting
calibration mode, the displayed value on the upper LCD might be
different from the nominal buffer value.
• It is possible to set the cell constant value directly, without following the
calibration procedure. To set the cell constant enter the setup mode
and select “CEL” (see SETUP for details).
NaCl CALIBRATION
