Rola-Chem 554000 ORP/pH Digital Controller - Manual (Page 17)

7.2 Factory Default Setting
Reset: The controller can be reset at any time to the default factory settings.
The factory presets are:
ORP set level:
650mv
pH set level: 7.4
ORP alerts: high- 900 mv, low- 100 mv
pH alerts: high- 8.0, low- 7.0
Feed time: 0.6 seconds
To reset default settings, follow these steps:
A. Turn the controller Off:
Press ‘MODE’ to ORP or pH and then hold ‘MODE’
Only flow light should be on.
B. Simultaneously depress and hold ‘SET LEVEL’ & ‘pH CALIB’
and while they are depressed, push ‘MODE’
The displays will read “Ld” and then turn On.
C. Release the “SET LEVEL” and “pH CALIB” buttons.
D. Turn the controller Off again and then On.
The last step is extremely important since this puts the controller back in the operating mode.
If step “D” is not performed the controller is in the test mode and it will not operate properly.
7.3 WATER CHEMISTRY RANGES
(These ranges are in accordance with suggested NSPI
Standards for swimming pools.)
pH: 7.4 -7.6
Alkalinity: Approx. 80-120 ppm ** (parts per million)
Higher levels may be acceptable in areas where it naturally occurs in the local water supply.
Consult a pool professional in your area.
Cyanuric Acid: 0-50 ppm.
(Maintain at 30 ppm or less for best probe life.)*
TDS (Total Dissolved Solids): 300 - 2000 ppm
Calcium Hardness: 200-400 ppm
Free Chlorine: 1.0 - 3.0 ppm (> 700 millivolts ORP)
*20-30 ppm of cyanuric acid provides approx. 95% of the shielding effect for chlorine.
**When using tri-chlor, recommended alkalinity is 95-125 ppm.
Rola-Chem Digital Controller PN 554102 6/01/2012 Page: 17 of 20