User Guide

- 23 -
P3.3: Select temperature compensation
This controller features selectable automatic temperature compensation (ATC) or
manual temperature compensation (MTC). ATC automatically compensates for
temperature fluctuations; MTC let you select a specific value at which temperature
will be compensated. ATC readings require a temperature sensor.
1. Key in the password “022” as per procedure in Section 5.
2. Press ▲ key twice. The screen will scroll P3.0 and CONF. Press ENTER
three times.
3. The screen will scroll P3.3 and MTC (or ATC).
4. Press ▲ or ▼ keys to toggle between MTC and ATC.
5. Press ENTER to confirm and return to general Setup mode.
Press ▲ and ▼ keys together (ESCAPE) to return to measurement mode.
NOTE: ORP is not affected by temperature and so ATC does not operate in ORP
mode. When set for ATC, the pH 190 will display temperature if a 100 Ω Pt 100
sensor is connected.