20
• Rinse the electrode and the temperature probe
before immersing them into pH 4.01 or pH10.01
calibration buffer, shake briefly and wait for
thermal equilibrium.
At this moment, "Err5" will disappear. The display will show the
temperature compensated value of the second buffer solution and
the pH symbol will be blinking.
If a wrong buffer or a faulty electrode
has been used, "Err5" remains on the
left display.
•
Press the CON key to confirm the pH value.
The left display value is then transferred to
the right display. The left LCD will show the
temperature value to indicate that the meter
is now calibrated.
Note:
The display on the left 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 "pH 10.01", depending on the
solution used. If the temperature is at 20°C, the display will
show respectively "pH 4.00" or "pH 10.06" (see page 26).
Note:
During calibration the pH symbol blinks on the left display, and
the right display always shows the measured value.
4 cm
(1½
")
HI 7004
pH
pH
pH
CON
ºC
pH
°C