20
Note: It is possible to interrupt calibration procedure at any time by pressing CAL CHECK or
ON/OFF keys.
Warning
: Do not calibrate the instrument with standard solutions other than the Hanna Instruments
CAL Check
TM
Standards, otherwise erroneous results will be obtained. When calibrating, only the
selected range is affected.
• Turn the meter on by pressing
ON/OFF
.
• When the beeper sounds briefly and the LCD displays dashes, the meter is ready.
• Press and hold
CAL CHECK
for three seconds to
enter calibration mode. The display will show
“CAL”
during calibration procedure. The blinking
“ZERO”
asks for instrument zeroing.
• Press
CAL CHECK
and the lamp, cuvette and detector icons together with “
CAL CHECK
” will
appear on the display, depending on the measurement phase.
• At the end of the measurement the display will show the validation standard value.
The reading should be within specifications as reported in the
CAL Check
TM
Standard Certificate. If
the value is found out of the specifications, please check that the cuvettes are free of fingerprints,
oil or dirt and repeat validation. If results are still found out of specifications, then recalibrate the
instrument.
VALID
ATION PROCEDURE
CALIBRA
TION PROCEDURE
3"