11
7.26
If the meter does not recognize the buffer, it means the electrode
could be defective or the buffer solution is wrong. Calibration
cannot proceed until they are rectified.
7.27
When the meter beeps, Offset point is established.
7.28
Now 1.68, 4.01, 9.18 and 12.45 will alternate on main display.
7.29
Rinse the pH electrodes and temperature probe in distilled water,
blot or shake dry then dip into next slope buffer solution.
7.30
When the meter recognizes the buffer, it will appear blinking.
7.31
If the value is different from the buffer solution then the electrode
could be damage.
7.32
Wait for meter to beep, Slope point is established.
7.33
The remaining buffer values will alternate on the main display.
7.34
Repeat step 7.29 to 7.33 sequentially up to 4 slope points.
7.35
At least 2 calibration points (offset & slope) must be established in each
session of calibration. Otherwise, calibrated point will not register.
7.36
When calibration is completed, press
ENTER
to store all calibrated
points and return to normal reading mode.
7.37
Anytime during calibration, press
EXIT
for 2 seconds will abort all.
Calibration with Custom Standard
7.38
Make sure the unit is properly installed and electrode connected.
7.39
Rinse the pH electrodes and temperature probe in distilled water
and dip in the buffer solution. You will need at least two (2) buffers.
Always begin with “Offset” calibration first
.
7.40
Press
CAL
and display will show
7
7
7
7
.
00
00
00
00
while
CAL
blinking, indicating
it is in calibration mode.
7.41
Press the
SELECT
button up / down to adjust the value.
7.42
When the meter beeps, it means reading has stabilized and ready
for calibration. Press
ENTER
to confirm to calibrate to the point.
7.43
A preset value of
1
1
1
1
.
40
40
40
40
,
3
3
3
3
.
80
80
80
80
,
and
12
12
12
12
.
.60
.60
.60
.60
will now alternate
requesting for a slope value.
7.44
Rinse the pH electrodes and temperature probe in distilled water,
blot or shake dry then dip into next slope buffer solution.
7.45
The meter will recognize the nearest buffer value and will appear
blinking while it beeps in wait of a complete action.
Always rinses the electrode with distilled water before and after each
test. This is to prevent solution carry over or cross contamination.
Standard solutions must maintain highest purity; otherwise the
meter’s accuracy could be compromised.
