Hanna Instruments Marine Instruments Turbidity and Free/Total Chlorine Meter User Manual

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To calibrate one range follow next steps:
• Turn the instrument ON by pressing ON/OFF.
Make sure that the instrument is in the free or
total chlorine range (the one you want to use).
• Press RANGE
to select the desired range
(free or total chlorine). When dashes appear
on the LCD, the instrument is ready. The current
time will be displayed on the secondary LCD, if
selected in SETUP menu. If not, “F Cl” or “t Cl”
will be displayed, depending on the selected
range.
The “ZERO” tag will blink on the LCD.
CALIBRATION PROCEDURE
To calibrate the free or total chlorine range of the HI 93414 the provided standard solution must be
used. Do not calibrate the instrument with standard solutions other than Hanna CAL CHECK™
Standards, otherwise erroneous results will be obtained. For accurate calibration please perform test
at room temperature, 18 to 25ºC (64.5 to 77.0ºF).
• Remove the cuvet.
• Place the CAL CHECK™ Standard cuvet B into
the holder. Make sure that the mark on the
glass is aligned with the mark on the instrument
top.
• Press CAL/CHECK. The LCD will display blinking
dashes and the measuring icon during check
measurement.
After a few seconds the display will show the
validation standard value.
Note:The reading should be within specifications as reported on the CAL CHECK™
Standard Certificate.
If the value is found out of specifications, please check that the cuvets are free of fingerprints, oil
or dirt and repeat validation. If results are still out of specifications, then recalibrate the instrument.

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