Calibration - Steiel EF110 pH Manual De Instalación, Programación Y Mantenimiento

measurement remains outside this threshold longer than the set time, an alarm is
generated and the display alternates between the measurement and the "ALL" message.
When the alarm is active, the dosage is disabled and normal operation is resumed when
the alarm is reset by pressing the ON/OFF button, by turning the pump off and on again, or
automatically when measurement returns to an acceptable value. This condition may occur
due to an insufficient dosage, such as not to allow the achievement of the threshold value.

CALIBRATION

pH calibration
1. Rinse the pH electrode with distilled water, then immerse it in the pH 7.01 buffer solution
2. Wait a few seconds for the system stabilization
3. Press and hold the [-] key until the message "OFS" (OFFSET calibration) is displayed
4. Press ON/OFF to confirm the calibration or wait for a few seconds for exiting without saving and
keeping the previous calibration
5. Rinse the electrode with distilled water, then immerse it in the pH 4.01 (or 9.01) buffer solution
6. Wait a few seconds for the system stabilization
7. Press and hold the [+]key until the message "GAI" (GAIN calibration) is displayed
8. Press ON/OFF to confirm the calibration or wait for a few seconds for exiting without saving and
keeping the previous calibration
Notes
If trying to perform an OFFSET calibration at a pH value very far from 7.00 or a GAIN calibration with a
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buffer solution of pH too close to neutrality, the procedure is not successful and the display shows the
"Err" message.
During normal operation you can see the offset (by pressing [-]) and gain (by pressing [+]) values, to
-
check the status of the electrode. The ideal values are an offset close to zero and a gain close to 1.000.
When these values are close to the max / min limits (offset: -1.00pH ... +1.00pH; gain: 0.750 ... 1.500), it
means that the electrode is contaminated or dead.
ORP calibration
1. Rinse the redox electrode with distilled water, then immerse it in the calibration solution (220 mV)
2. Wait a few seconds for the system stabilization
3. Press and hold the [-] key until the message "OFS" (OFFSET calibration) is displayed
4. Press ON/OFF to confirm the calibration or wait for a few seconds for exiting without saving and
keeping the previous calibration
Notes
The ORP calibration is a single point procedure (offset). However, pressing the [+] key the system enters
-
the GAIN calibration, but this will not have any effect.
During normal operation you can see the offset value (by pressing [-]),to check the status of the electrode.
-
The ideal value is an offset close to zero. When this value is too close to the max / min limits (-100mV ...
+100mV), it means that the electrode is contaminated or dead.
EF110_r1.0 – 10/2019 p. 20