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Press CFM to confirm calibration.
• The instrument returns to measurement mode.
NaCl CALIBRATION
NaCl calibration is a one point procedure in 100.0% NaCl solution. Use the HI7037 calibration solution
(seawater solution) as a 100% NaCl standard solution.
• To enter NaCl calibration select the Salinity % range and press CAL.
• The instrument enters the Salinity calibration screen.
• Press Salt. The measured % NaCl, the temperature and the 100% NaCl standard are displayed.
• Rinse the probe with some of the calibration solution or deionized water. Immerse the probe into
HI7037 solution. Tap the probe repeatedly to remove any air bubbles that may be trapped inside
the sleeve.
• The “ ” tag will blink on the LCD until the reading is stable.
• When the reading is stable, the CFM functional key is displayed.
Notes: If the uncalibrated reading is too far from the expected value, calibration is not recognized.
The “Wrong” message will be displayed.
The meter uses 1.90 %/ °C temperature compensation factor during calibration. If the “Temperature
Coef” in the SETUP menu has been set to a different value, when exiting calibration mode, the
displayed value might be different from the nominal standard value.
EC CALIBRATION
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