User's Manual

• The meter automatically recognizes the buffer value and prompts

for the second at "d2" or "t2" (= pH 4.01, acid) or "d3" or "t3"

(pH 9.18 and pH10.01 respectively, alkaline).

• Press the CON key to confirm the pH value.

• The display will indicate the temperature compen-

sated buffer value e.g. if the temperature is at 25°C, the display

will show "pH 4.01" or "10.01" or "pH 9.18", depending on the

solution being used. If the temperature is at 20°C, the display

will show respectively "pH 4.00" or "pH 10.06" or "pH 9.22" (see

page 23).

• Press CON key again to confirm calibration. The

meter is now calibrated.

• The pH symbol will stop flashing and the unit is

ready for measurements.

• If the reading is drifting, turn the meter off and repeat the

calibration procedure waiting longer for the reading to stabilize.

However, usually 1 or 2 minutes is enough time to prevent a

drifting reading.

Note: If you need to unplug the instrument, press the OFF key thus

switching the instrument off before disconnecting the power

cord. In this way the instrument will retain the calibration

data. Otherwise, re-calibration might be necessary. In the case

of a power failure while the instrument is operational, re-

calibration might be required.

PH CALIBRATION FOR HI8519

Note: If you need to calibrate to NBS standards, use pH 6.86

(HI7006 or HI8006) and pH 9.18 (HI7009 or HI8009) in-

stead of pH7.01 and 10.01 respectively.

Use a ChecktempC or a glass thermometer with an resolution of 0.1°

as reference thermometer.

CON

°C