User's Manual

• Press the CAL key. The temperature compensated

buffer value will be displayed e.g. if the buffer

temperature is at 25°C, the display will show

pH7.01. If the buffer temperature is at 20°C,

display will show pH 7.03 (see page 23). If

"E4" appears the calibration solution is wrong.

• Wait until the pH symbol stops flashing: that

means the reading is stable.

• Press the CON key. The symbol "E5" will appear

to indicate that the electrode is still in pH 7.01

buffer, but expecting a pH 4.01 or 10.01 buffer.

• Rinse the electrode and temperature probe be-

fore immersing them into pH 4.01 / pH 10.01 calibration buffer,

shake briefly and wait for thermal equilibrium.

• The symbol "E5" should disappear and the temperature compen-

sated buffer value is flashing.

• Wait until the pH symbol stops flashing, press the CON key to

confirm the calibration.

• The pH calibration is now complete.

CALIBRATION WITH MANUAL TEMPERATURE COMPEN-

SATION FOR HI8417, HI8520 AND HI8521 ONLY)

If for some reason the temperature probe is defective, or it is required

to calibrate with manual temperature compensation, follow the proce-

dure below:

• Unplug the temperature probe from the

meter.

• Note the temperature of the buffer with a

ChecktempC or a glass thermometer.

• Use the UP and DOWN arrow keys to

set the temperature to the noted tem-

perature.

• Follow the calibration procedure as for

pH calibration with temperature probe

connected (see page 18 for HI8417 or

page 21 for HI8520/HI8521).

ºC

CAL

CON