Orion Star A221 and Star A321 Portable pH Meters
7
pH Buffer Group Selection
The selected buffer group allows for the automatic recognition of certain pH buffers during a pH calibration.
The USA buffer group includes pH 1.68, 4.01, 7.00, 10.01 and 12.46 buffers and the DIN buffer group includes
pH 1.68, 4.01, 6.86, and 9.18 buffers.
1. In the measurement mode, press
2. Press
,
,
or
to highlight
pH Channel
and press
f3 (select)
.
3. Press
or
to highlight
Mode and Settings
and press
f3 (select)
.
4. Press
or
to highlight
Buffer Group
and press
f3 (select)
.
5. Press
or
keys to highlight
USA
or
DIN
and press
f3 (select)
.
6. Press
to return to the measurement mode.
Read Type Selection
1. In the measurement mode, press
.
2. Press
,
,
or
to highlight
pH Channel
and press
f3 (select)
.
3. Press
or
to highlight
Mode and Settings
and press
f3 (select)
.
4. Press
or
to highlight
Read Type
and press
f3 (select)
.
5. Press
or
to highlight
Auto
,
Continuous
or
Timed
(Star A321 meter only)
and press
f3 (select)
.
a.
Star A321 meter only
– If
Timed
is selected and the time interval needs to be changed – highlight
Timed
; press
to highlight hours (HH), minutes (MM) or seconds (SS); press
f3 (edit)
to access the
numeric entry screen; use the numeric entry screen to change the values and press
f1 (back)
when the
time interval is correct.
6. Press
to return to the measurement mode.
