19
P2.3: Set Hysteresis value
Hysteresis prevents rapid contact switching if measured value is fluctuating near
the set point. Once activated, relay will not de-activate until measured value
reaches set point plus hysteresis value.
Example: High set point is 900 ppm and hysteresis 50 ppm, relay will activate
when value rises above 900 ppm, but will not de-activate till measured TDS value
drops below 850 ppm.
Default hysteresis value is 5% of full scale. The hysteresis window can be set to
any value within the range shown below:
TDS Range
Range No., R
Hysteresis Window
0.00 – 10.00 ppm
1
0.00 – 1.00 ppm
0.0 – 100.0 ppm
2
0.0 – 10.0 ppm
0.0 – 100.0 ppm
3
0.0 – 10.0 ppm
0 – 1000 ppm
4
0 – 100 ppm
0.00 – 5.00 ppt
5
0.00 – 0.50 ppt
0.00 – 10.00 ppt
6
0.00 – 1.00 ppt
0.0 – 100.0 ppt
7
0.0 – 10.0 ppt
0.0 – 100.0 ppt
8
0.0 – 10.0 ppt
1.
Key in password “022” as per procedure in Section 5.
2.
The screen will scroll P2.0 and SP2. Press ENTER three times.
3.
The screen will scroll P2.3, HYS2, and current hysteresis value.
4.
Press
▲
or
▼
keys to adjust hysteresis value (0 to 10% of full scale).
5.
Press ENTER to confirm. Press
▲
and
▼
keys together to return to P2.0.
Press
▲
and
▼
keys together to return to TDS measurement mode.