22
•
••
•• After about 30 seconds, the small display will
show "YES": press the CFM key to confirm the
calibration.
The LCD will show "Err5" to indicate that the electrode is now
ready for slope calibration and another step of instruction proce-
dures will be printed.
•
••
•• Rinse and immerse the pH electrode and tem-
perature probe in pH 4.01 or pH10.01 solution.
The LCD shows the corresponding buffer value at the working
temperature. If "Err5" does not disappear this means that the
buffer is not recognized as pH4 or pH10.
•
••
•• After about 30 seconds, the small LCD confirms the reading by
displaying "YES".
• Press the CFM key and the printer will confirm
that the pH calibration is completed.
Now dip the
electrode in 2nd
solution, wait
for 'YES' to
appear and then
press CFM
ºC
pH
CFM
°C
4 cm
(1½
")
HI 7004
ºC
pH
CFM
Calibration is
now completed.
°C