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2. Operating Modes
The function switch is used to select the required mode. The four operating modes
available are…
1. SET LIMIT : Switch to SET LIMIT when setting the pH value at which the
Alarm LED and (optional) relay output are activated. The
relay output is not operational in this mode. See section 3.5.
2. STANDBY : Switch to STANDBY to inhibit the Alarm LED and
(optional) output relay action. Select this mode for calibration,
or when automatic dosing is not required.
3. AUTO : Switch to AUTO to enable the Alarm LED and (optional)
relay output. These will be activated when the pH is outside
the limit value. See section 3.5.
4. MANUAL : Switch to MANUAL to manually dose acid or base when the
optional relay output is fitted. The relay output will be
activated for as long as the miniCHEM-pH is in this mode,
regardless of the pH reading. See section 7.
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