Hanna Instruments HI 99300, Instruction Manual, Page: 12 / 20

12
EC calibration
Before calibration, rinse the sensor
tip with a heavy stream of purified
water then shake excess water from
the probe.
Select calibration “
STD “ . The
meter enters the calibration mode and “ μS 1.41 USE ”
( HI99300 ) or “mS 12.88 USE“ ( HI99301 ) is displayed
with tag blinking. Immerse the probe in calibration
solution. If the standard value is recognized “ REC “ is displayed
then “ WAIT “ until the calibration is accepted. The LCD
will display “ SAVE ” for 1 second and return to normal
measurement mode. If the standard is not recognized or the
slope is out of accepted range “
--- WRONG “ is display.
Change the calibration solution, clean the electrode or press
any key to exit calibration. When the calibration procedure is
completed, the “
CAL “ tag is turned on.
Note: - Beta should be set to 1.9 during calibration.
- Since there is a known relationship between the EC and
TDS reading, it is not necessary to calibrate the meter in
TDS. If the conversion factor is either 0.5 or 0.7, the meter
will allow a direct calibration in TDS by using the Hanna
calibration solutions.
OPERA
TIONAL GUIDE