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Macro 900 Operation Manual
can be reduced. The efficiency of the pH electrode is constantly monitored and
in the event of the efficiency dropping below 85%, 'ERROR 01' will be flashed
on the bottom line of the display. If this occurs, or if the pH reading response
becomes slow, recondition the electrode as described below.
13.8. Servicing the pH Electrode
1.
Remove the pH or combined pH/ORP electrode from the Probe body
(see
2.
Rinse with methyl alcohol.
3.
Replace the electrode.
4.
Re-calibrate.
Never place the entire MAP 2000/2100 in methyl alcohol, as this will
cause irreparable damage to the DO/EC electrode. Damaged caused in
this way is not covered by the warranty.
If the methyl alcohol rinse does not restore the electrode, perform the following
actions:
1.
Remove the electrode from the body again.
2.
Soak in 0.1M HCl for 5 minutes.
3.
Rinse in de-ionised water.
4.
Soak in 0.1M NaOH for 5 minutes.
5.
Rinse in de-ionised water.
6.
Soak in pH4.01 buffer for 10 minutes.
If the above procedure still does not restore performance, replace the
electrode.
13.9. Calibrating ORP
ORP electrodes should be calibrated at least once a month to ensure optimum
accuracy. Full calibration involves calibrating at a single point, (255mV at 25°C)
using a 255mV ORP calibration standard such as PT 1252 ORP Calibration
Solution or similar.
For best results, calibrate as close to 25°C as possible. The probe will
automatically compensate for temperature variation in the calibration solution
during calibration.
To calibrate the ORP electrode follow these steps:
1.
Fill a calibration bottle with fresh calibration solution, remove
the storage cap from the pH/ORP electrode, wash the Probe in
distilled water, then drop the Probe in all the way.
2.
Switch the Macro 900 Meter on and wait until the temperature and
ORP measurements are completely stable.
3.
Ensure the temperature of the solution is between 5ºC and 40ºC
(41ºF - 104ºF).
© 2013 Palintest Ltd.
Electrode Removal and
www.palintest.com
Replacement).
V3
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Troubleshooting
