EUTECH INSTRUMENTS alpha pH 200, Инструкция по эксплуатации, Страница: 23 / 40

- 19 -
9.4 Set Point 2 – P2.0
Setup program P2.0 allows you to set parameters for relay 2.
P2.1: select relay 2 set point value
P2.2: select relay 2 as low or high set point
P2.3: set relay 2 hysteresis value (dead band)
P 2.0 P 2.1 P 2.2 P 2.3
10.00 1.00
HYS 2 SP 2 SP 2 SP 2
LOW
HIGH
Press
▲ and ▼ keys together (ESCAPE) at anytime, to leave the Setup mode
and return to Measurement mode.
P2.1: Select relay set point value
This lets you choose the pH (or ORP) value that will cause your controller to
activate. If this value is crossed, the set point relay 2 LED will light.
1.
Key in the password “022” as per procedure in Section 5.
2. Press ▲ key once. The screen will scroll P2.0 and SP2. Press ENTER.
3. The screen will scroll P2.1, SP2, then the current set point value.
4. Press ▲ or ▼ keys and adjust second relay set point. You can adjust it in
0.01 increments from 0.00 to 14.00 pH (-999 to 1000 mV).
5. Press ENTER to confirm and continue to step three of P2.2.
P2.2: Set relay as high or low set point
Select a low set point to activate controller when your value undershoots the set
point; select a high set point to activate controller when your value overshoots the
set point.
Using both SP1 and SP2, you can select lo/lo, lo/hi, hi/lo or hi/hi set points.
1.
Key in the password “022” as per procedure in Section 5.
2. Press ▲ key once. The screen will scroll P2.0 and SP2. Press ENTER
twice.
3. The screen will scroll P2.2, SP2, and LOW (or HIGH).
4. Press the ▲ or ▼ keys to toggle between LOW and HIGH.
5. Press ENTER to confirm and continue to step 3 of P2.3.