18
Set pH Screen
Refer to Table 3. Adjacent.
Allows the user to set the pH options. This screen should never
require changing whilst in a monitoring mode. pH is a read
only value generated by the controller and is not a value that can be
set from this screen.
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Models - pH
CT
Series
C [x]
Series
S
Series
T
Series
A & P
Series
Options
Available
Not
Fitted
Acid/
Base
Acid/
Base
Acid/Base
Acid
(Not Visible)
Default Mode
N/A
Acid
Acid
N/A
Acid
Unsafe minimum
pH warning
N/A
6.5
6.5
No
warnings
6.0
Unsafe maximum
pH warning
N/A
9.5
8.5
No
warnings
Window
6.00-8.00
Default Values
N/A
8.20
7.40
Window
6.00-8.00
6.50
Table 3.
SET: [7.50]
Options: Values in the range
3.00 to 11.00
Use arrow keys to cycle these
selections.
DUTY: [50%] = Pump Dose
Duty.
Options: Values in the range 1 to
100%
Use arrow keys to cycle these
selections.
DOSE STATE: [A]
Options:
A/B
Use arrow keys to cycle these
selections.
The pH controller can be configured to dose acid (A) or
base (B). When configured to A the controller will dose acid
when the pH value rises above the set point. If the controller
is configured to B it will dose alkaline solution to increase
the pH value.
MODE: [FLOW]
Options: FLOW/CON/OFF. Use arrow keys to
cycle these selections.
ALM: [+/-]
Options:
+ (alarm if above specified value)
- (alarm if below specified value)
+/- (alarm if outside specified range)
OFF (Alarm disabled)
Use arrow keys to cycle these selections.
When the cursor is on one of the alarm modes press ENT to change
the numerical values associated with that alarm. Select from the
values of 0.5, 1.0, 1.5, 2.0, 3.0, and 3.5. These values are the range
from the set point that will trigger an alarm. Press the ENT again to
move to the next set pH item.
Alarm defaults: Min: 6.5 / Max: 9.5.
The controller will issue alarms when these values are exceeded.
LOCK: [OFF]
Options: (Preferred lockout period)
Value In the range of 10 to 990 minutes,
OFF - disabled Use arrow keys to cycle these selections.
If the lockout time is greater than 10 the lockout function is active.
The controller will then “lock out” output after the selected time has
elapsed without the controller having reached its nominated set
point for pH. This is a safety feature to prevent overdosage in case
of sensor failure
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2
System Configuration
2
System Configuration
