14
icon will lit up. The "CAL" icon will begin to flash.
5.
Rinse the ISE in distilled water and immerse it in the first
standard solution. Press and hold
“Stand”
for 2 seconds.
The “CAL” icon will lit up. The main display will show “- - - -”
and the secondary display will show corresponding ion
calibration value (0.10, 1.0, 10, 100). Use
“Up”
or
“Down”
to
select first point calibration value.
6.
Press
“Slope/Enter”
. The mV value of the standard solution.
When the MV value of the standard solution is stable, press
“Slope/Enter"
to save. The ion calibration value on the
secondary screen moves up to the next value. The first point
calibration is complete and the meter is ready for the second
point calibration.
7.
Rinse the ISE in distilled water and immerse it in the second
standard solution. When the MV value of the standard solution
is stable, press
“Slope/Enter"
to save. The ion calibration
value on the secondary screen moves up to the next value.
The second point calibration is complete and the meter is
ready for the third point calibration.
8.
To continue with the third, the fourth and the fifth point
calibration, repeat step 7. Press
“Mode”
to exit calibration
mode when the desired calibration points are completed.
[
Note:
The slope (mV difference between two consecutive
points) is 15 to 90 mV.]
H. ION Measurements
a.
Measurement in the ION-AUTOLOCK mode.
1.
Connect the ISE to the BNC connector of the unit.
2.
Press
“Mode”
until “AUTO” and “MAN” icons lit up.
3.
Rinse electrode with distilled water and immerse it in sample to
be measured.
4.
Press the
“Mea./Eff.-”
. The “WAIT” icon will start to flash. The
unit is waiting for a stable reading. The display will track the ion
value as sensed by the ion selective electrode.
5.
When the “WAIT” icon disappears, the reading is then “LOCK”
and will not respond to further changes from the sample. The
ion value is the sample reading.
[
Note:
For samples that are inherently unstable, the unit will
not AUTOLOCK. In this case, use the ION NON- AUTOLOCK
