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9
RST
(
P9
P9
P9
P9
.
0
0
0
0
) MASTER RESET
This setting allows you to reset the unit to the original factory’s default.
Original factory default:
buf
buf
buf
buf
(
P4
P4
P4
P4
.
0
0
0
0
) =
i
i
i
iSo
So
So
So
rdY
rdY
rdY
rdY
(
P6
P6
P6
P6
.
0
0
0
0
) =
yes
yes
yes
yes
1. Press
and display will show
no
no
no
no
(
P9
P9
P9
P9
.
1
1
1
1
) flashing.
2. Press
to select between
YES
YES
YES
YES
or
no
no
no
no
. If you select
YES
YES
YES
YES
and
press
, all setting will be cleared and reset to original factory
default. Otherwise select
no
then press
and
display
will
return to
rSt
rSt
rSt
rSt
(
P9
P9
P9
P9
.
0
0
0
0
)
.
3. Press
to return to beginning.
9.4 After completing setup, press
to exit
SETUP
.
10. CALIBRATION:
10.1 Prepare standard solutions of at least 2 calibration points. If
measurements are to be made in the acidic range, select 2 points
between pH0 to 7. If measurements are made in the alkaline range,
then select between pH7 to 14. If full range is required, calibrate at
least 3 to 5 calibration points between pH0 to 14.
10.2 Buffer standard must be set during
SETUP
in page 7,
BuF
BuF
BuF
BuF
(
P4
P4
P4
P4
.
0
0
0
0
)
.
10.3 Standard solutions are in 3 groups of standards – ISO, Nist and
custom standards.
ISO buffer standards are pH7.00, 4.01 and 10.01
NIST buffer standards are pH1.68, 4.01, 6.86, 9.18 and 12.45
Custom standards can be defined by manually set the buffer standard.
10.4 Do keep in mind that buffer standards are specified at 25°C.
Calibration value should set to the exact value as the buffer solution
value correlate to the current calibration temperature.
* Calibration should be performed as frequently as possible
to ensure accurate measurement, depending on the
frequency of tests performed. Additional calibration
solution should be purchased for future needs
.