5
Bvf
-
CALIBATION BUFFER STANDARDS
This setting allows you to select ISO, NIST or customized
buffer standard. Factory preset is ISO standard.
ISO
(
I
I
I
ISO
SO
SO
SO
)
buffer standards are pH1.68, 7.00, 4.01, 10.01,
12.45 and
NIST
(
I
7
I
7
I
7
I
7
I
I
I
ISt
St
St
St
)
buffer standards are pH1.68,
4.01, 6.86, 9.18 and 12.45, which are preset in this
meter, and will be automatically recognized during
calibration.
Select
customize
(
CvSt
CvSt
CvSt
CvSt
)
if you have other standards
other than standard buffer solutions.
1.
Press the
ENTER
key to set; display will show
I
I
I
ISO
SO
SO
SO
blinking.
2.
Press the
SELECT
key
up
or
down
to select from
I
I
I
ISO
SO
SO
SO
,
I
7
I
7
I
7
I
7
I
I
I
Ist
st
st
st
or
CvSt
CvSt
CvSt
CvSt
and press the
ENTER
key to confirm.
3.
Press the
SELECT
key
up
for next setting.
stAt
PrB
PrB
PrB
PrB
-
PROBE ELECTRODE STATUS
This setting allows you to review the last calibration
information about the electrode conditions.
A good pH electrode should have an Offset value no
greater than ±60mV and a Slope value of above 75%
and below 115%. Otherwise, the electrode should be
replaced.
There are 5 calibration points for review as follow:
Displayed Value Calibration Point within range
OFF
OFF
OFF
OFF
Offset in mV
pH7.00
SL1
SL1
SL1
SL1
% of slope
pH 7.00 to 4.01
SL2
SL2
SL2
SL2
% of slope
pH 7.00 to 10.01
SL3
SL3
SL3
SL3
% of slope
pH 4.01 to -2.00
SL4
SL4
SL4
SL4
% of slope
pH 10.01 to 16.00
1.
Press the
ENTER
key to set; display will show the mV
value with
Off
Off
Off
Off
blinking.
2.
Press the
SELECT
key
up
to review Slope point 1,
display will show the % of slope with
sl1
sl1
sl1
sl1
below.
3.
Press the
SELECT
key
up
sequentially to review all
the rest of slope value 2, 3, 4 and then back to
Offset in a cyclical mode.
4.
When finish, press the
EXIT
key once followed by
the
SELECT
key
up
for next setting.
IsO
bvf
SETUP
ENTER
SELECT
EXIT
%
98.5
sl2
stAt
Prb
SETUP
ENTER
SELECT
EXIT
0.5
mV
Off
SETUP
ENTER
SELECT
EXIT
SETUP
ENTER
SELECT
EXIT
