User Guide

CALIBRATION CALIBRATION

CALIBRATION

Calibration is 1-point at 100.0% NaCl. Use the HI 7037 calibration

solution (sea water solution) as a 100% NaCl standard solution.

To enter NaCl calibration select the NaCl range and

press the CAL key.

Rinse the probe with some of the calibration solution or

deionized water. Immerse the probe into HI 7037 solu-

tion. The sleeve holes must be completely submerged.

Tap the probe repeatedly to remove any air bubbles that

may be trapped inside the sleeve.

The indications "BUF" and "CAL" are dis-

played. The upper LCD shows the uncalibrated

NaCl reading in percentage. The lower LCD

shows "100".

When the " " symbol stops blinking, the

reading is stable. The "CON" indication starts

blinking on the LCD asking for confirmation.

Press ALT + CFM to confirm the calibra-

tion.

If everything is satisfactory, the meter displays the "Stor Good" mes-

sage and returns to measurement mode.

Note: If the uncalibrated reading is too far from the expected value,

the calibration is not recognized. The "CON" indication does not

appear; the " " and "BUF" symbols blink to signal wrong or

contaminated calibration solution.

Note: The meter uses 1.90%/C compensation factor during calibra-

tion. If the setup item "tc" has been set to a different value,

when exiting the calibration mode the value displayed on the

LCD could be different from the nominal calibration value.

III In order to minimize any EMC interference, use plastic beakers.

IV The meter uses 1.90%/C compensation factor during calibra-

tion. If the setup item "tc" has been set to a different value,

when exiting the calibration mode the value displayed on the

upper LCD could be different from the nominal buffer value.

V 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).