Thermo Fisher Scientific Alpha pH 190 (In the process of updating the brand guideline & product image) - Manual (Page 13)

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4 MEASUREMENT MODE
The Alpha pH 190 controller is capable of taking pH (or ORP)
measurement with Automatic (ATC) or Manual (MTC) Temperature
Compensation.
The measurements are displayed distinguishingly by the
annunciators on the front panel.
4.1 Measurement mode display
Press the MODE key to toggle between pH (or ORP) and
Temperature measurement mode.
pH (ORP) measurement mode
The controller starts up in the mode when last powered off (pH or
ORP).The pH (or ORP) annunciator will light up.
For selection of pH or ORP measurement mode, see Setup
program P3.1.
Temperature Measurement mode
Press MODE key once to view the temperature measurement. The
°C annunciator lights up. The display shows ATC or MTC, then the
current measured temperature.
For selection of temperature compensation ATC or MTC, see Setup
program P3.3.
NOTE: After pressing the MODE key to display Temperature, if
there is no further key-press, the controller will automatically revert
to pH (ORP) measurement mode after about 30 seconds.
4.2 Set Points Adjustments
You can make quick set points adjustments with the direct access
of the Set Points adjustment modes (SP1 and/or SP2). By just
pressing the SP1/▲ or SP2/▼key, you can enter the Set Point
adjustment mode and set a new pH (or ORP) value that will cause
your controller to activate.
Set Point 1 (SP1) adjustment mode
This lets you adjust the pH (or ORP) value in Set Point 1. If this
value is crossed, the set point relay 1 LED will light.
1. Press the SP1/▲ key. The screen will scroll P1.1, SP1, and
then the current set point value.