23
OFF
ON
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.
• To change the range, simply press
RANGE/GLP .
• 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.
• Place the
CAL Check
TM
Standard Cuvette A into the cuvette holder and ensure that the notch
on the cap is positioned securely into the groove.
CALIBRA
TION PROCEDURE
3"