Thermo Fisher Scientific Alpha pH 190 (In the process of updating the brand guideline & product image) - Manual (Page 29)

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9.5 Configuration – P3.0
Setup program P3.0 let you configure controller parameters.
P3.1: select pH or ORP mode of operation
P3.2: select symmetrical or asymmetrical input mode
P3.3: select temperature compensation (manual or automatic)
P3.0
CONF
P3.1 P3.2 P3.3
PH ASYM
SYM ORP
MTC
aTC
Press ▲ and ▼ keys together (ESCAPE) at anytime, to leave the
Setup mode and return to Measurement mode.
P3.1: Select pH or ORP
This lets you set the controller to take pH or ORP measurements.
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.
3. The screen will scroll P3.1 and PH (or ORP).
4. Press ▲ or ▼ keys to toggle between pH and ORP.
5. Press ENTER to confirm and continue to step three of P3.2.
P3.2 Select symmetrical or asymmetrical input mode
Use asymmetrical mode under normal operating conditions. Use
symmetrical mode when the measuring environment is electrically
noisy (i.e. in electroplating environments). Default is asymmetrical.
See Appendix 1 for more details on operation in symmetrical and
asymmetrical modes.
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 twice.
3. The screen will scroll P3.2 and ASYM (or SYM).
4. Press ▲ or ▼ keys to toggle between ASYM and SYM.
5. Press ENTER to confirm and continue to step three of P3.3.
NOTE: If the unit is set to symmetrical mode, the potential matching
pin (or liquid ground) has to be connected to pin 4 (connector B).
Please refer to the Back Panel diagram on page 4.