Trans instruments WalkLAB HP 9010 - Page 6

5
Bvf - CALIBATION BUFFER STANDARDS
This setting allows you to select ISO, NIST or customized
buffer standard. Factory preset is ISO standard.
ISO (I
II
ISO
SOSO
SO)buffer standards are pH1.68, 7.00, 4.01, 10.01,
12.45 and NIST (I7
I7I7
I7 I
I I
ISt
StSt
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
CvStCvSt
CvSt) if you have other standards
other than standard buffer solutions.
1. Press the ENTER key to set; display will show I
II
ISO
SOSO
SO
blinking.
2. Press the SELECT key up or down to select from I
II
ISO
SOSO
SO,
I7
I7I7
I7 I
I I
Ist
stst
st or CvSt
CvStCvSt
CvSt and press the ENTER key to confirm.
3. Press the SELECT key up for next setting.
stAtPrB
PrBPrB
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
OFFOFF
OFF
Offset in mV pH7.00
SL1
SL1SL1
SL1
% of slope pH 7.00 to 4.01
SL2
SL2SL2
SL2
% of slope pH 7.00 to 10.01
SL3
SL3SL3
SL3
% of slope pH 4.01 to -2.00
SL4
SL4SL4
SL4
% of slope pH 10.01 to 16.00
1. Press the ENTER key to set; display will show the mV
value with Off
OffOff
Off blinking.
2. Press the SELECT key up to review Slope point 1,
display will show the % of slope with sl1
sl1sl1
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