5 Select calibration method (1P, 2P or 3P):
CAL
.
Confirm selection:
MODE
.
If 1 or 2 point calibration has been set:
Select calibration points (4, 7 or 10, and 4 7 or 7 10):
CAL
.
Confirm selection:
MODE
.
6 Switch Auto Off on (On) or off (OFF):
CAL
.
Confirm selection:
MODE
.
7 Display light on (On) or off (OFF):
CAL
.
Confirm selection:
MODE
.
8 Switch beeper on (On) or off (OFF):
CAL
.
Confirm selection and save set-
tings:
MODE
.
- All of the segments light up briefly and the instrument changes
to the measurement mode.
5.3 Measuring
Setting up the instrument
If large quantities of the electrolyte gel are stuck to the probe
when removed from the storage cap, it is a sign that the gel is
spent.
A new storage cap is needed.
Clean off the pH probe before and after each measurement
with low concentration soap water followed by tap water
(water temperature should be below 40 °C). Dab dry with a
paper towel. Do not rub.
After horizontal storage:
Briefly shake the probe in order to release any gas bubbles
which may have formed in the probe tip.
1 Carefully remove storage cap.
2 Switch on instrument:
ON/HOLD
.
Carry out measurement
Measurement tip made of glass, risk of breakage!
Risk of injury on account of glass parts which remain in the
measurement medium.
Check measurement tip of pH probe after each measurement
for damage.
5. Operation 23
en
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