Honeywell APT4000PH - Manual Calibration

70
APT4000PH
Display
Action
Remark
Enter the pH value of your buffer
solution for the proper tempera-
ture. While the “hourglass” icon
flashes, the electrode and temper-
ature probe remain in the first
buffer solution.
Manual calibration
Temperature detection automatic or manual
Press CAL key,
enter code 1100
Select with key,
edit number with key,
proceed with ENTER
Remove the electrode and
temperature probe, clean them
and immerse them in the first
buffer solution (in any order).
When “Manual temp detection”
has been configured, enter value in
the secondary display using the
arrow keys. Start with
ENTER .
If an invalid code is
entered, the
APT4000PH returns
to measuring mode.
The response time of
the electrode and
temperature probe is
considerably reduced
if the electrode is
first moved about in
the buffer solution
and then held still.
Analyzer in Hold
mode, measured
value frozen.
Sensoface inactive.
For calibration with manual buffer specification, you must enter the pH value of
the buffer solution used in the analyzer for the proper temperature. This presetting
enables calibration with any desired buffer solution. The MAN calibration mode
and the type of temperature detection are selected in the configuration mode.
71
Display Action
Remark
Stability check:
The measured mV value is dis-
played.
To abort stability
check: Press CAL.
(accuracy reduced)
Calibration with the first buffer is
terminated. Remove the electrode
and temp probe from the first
buffer solution and rinse them
thoroughly.
• One-point calibration:
End with CAL.
Slope [%] and asymmetry poten-
tial [mV] of the electrode are dis-
played. Proceed with
ENTER .
For one-point
calibration only:
• Two-point calibration:
Immerse electrode and
temperature probe in the second
buffer solution.
Enter the pH value of the second
buffer solution.
Start with
ENTER .
The calibration
process runs again as
for the first buffer.
Retract electrode and temp probe
out of second buffer, rinse off, re-
install.
Repeat calibration: CAL,
End calibration:
ENTER .
Slope and asymmetry
potential of electrode
(related to 25 °C) are
displayed.
pH value and Hold are displayed
alternately.
Proceed with
ENTER.
Hold is deactivated after 20 s
Security prompt.