Thermo Fisher Scientific CyberScan pH 1500 - Manual (Page 40)

Instruction Manual CyberScan pH1500
38
std
B. Using Custom Buffer Values
a. Press std to access the standardize mode while you are in the pH
Measure mode.
b. Proceed to step c to begin standardization. Press setup key if you
need to select other buffer group. Use ▲ or ▼ key to select desired
buffer group and press enter key to confirm selection.
c. The meter automatically scans and recognizes the pH buffer being
standardized; it locks and displays the closest suitable pH buffer
value on the screen. When the stable icon appears, the buffer value
flashes on the screen, prompting if you wish to confirm the selection.
d. Press enter key to make selection. The displayed buffer value
flashes momentarily and the meter automatically accepts the
calibration point. The first calibration point (pH offset) is successfully
performed.
e. If incorrect selection is made or the electrode condition does not meet
the meter’s criteria, an error message prompts you to troubleshoot or
take remedial action. Press enter key to return to standardization
using correct buffer values.
f. However for custom buffer values, the next buffer value must be
more than 2 pH apart from the last standardized buffer value. When
standardizing the second or subsequent buffer value, the screen
scans and displays the rest of not-standardized buffer values.
g. To select other buffer value from another buffer group, press the
setup key and use ▲ or ▼ key to choose the desired buffer group.
Press enter key to confirm selection.
h. Similarly the meter scans, displays the available not-standardized
buffer values of the buffer group and locks onto the closest buffer
value for your selection.
i. Press enter key to confirm selection.
j. Repeat the above step g through i for the subsequent calibration
points. Meter automatically returns to the Measure mode after the last
5
th calibration point has been performed. An error message Err2 will
be displayed if there is more than 6 points pH standardization being
performed.
k. In the pH Measure mode, the screen shows all the buffer values
being standardized.
)
When the ATC probe is connected, the meter will continually adjust
for temperature. Therefore the buffer values may vary slightly from
the nominal values because of temperature variations.