eutech-instruments alpha ph 190 18 din phorp controllertransmitter User Manual

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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.