1.Access automatic calibration
AUT.CAL = Automatic calibration
Access to maintenance mode
Select automatic calibration
Move pointer to AUT.CAL
Confirm selection
2. First buffer calibration
CAL 7 = Calibrate at pH 7
Select pH value for first buffer solution
Accept displayed buffer
Select other value
Calibration can be ended *
Continue calibration with second
buffer solution
End calibration with on buffer only
(asymmetry potential only)
3. Second buffer calibration
CAL 4 = Calibrate at pH 4.
Select pH value for second buffer solution
Accept displayed buffer
Select other value
Calibration can be ended *
End calibration
Repeat calibration with first buffer
solution
5. MAINTENANCE
5-1. Automatic calibration
IM 12B6C2-E-H
18
MEASURE
AUT.CAL
MAN.CAL
DISPLAY
TEMP.
HOLD
YES
NO
YES
NO
pH
MODE
MEASURE
AUT.CAL
MAN.CAL
DISPLAY
TEMP.
HOLD
YES
NO
YES
NO
MODE
MEASURE
AUT.CAL
MAN.CAL
DISPLAY
TEMP.
HOLD
YES
NO
YES
NO
MODE
ESCAPE TO MEASURE can be used at any stage to abort operation.
WARNING: If the HOLD function is activated the instrument returns with the question HOLD (flashing); answer YES or NO or
MODE again to return to measurement.
MODE
MODE
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
Insert electrodes in buffer solution. Display shows CAL and
flashes while instrument searches for stable measurement.
Display show CAL.END. Measurement is now stable.
*) The value shown on the display can deviate from the buffer value. This is fixed after calib-
ration is completed.
Insert electrodes in buffer solution. Display shows CAL and
flashes while instrument searches for stable measurement.
Display show CAL.END. Measurement is now stable.
