9
The
PPM calibration
window displays the following mea-
surements:
PPM:
The PPM measurement to be adjusted with correct
manual measurement.
ORP:
The current ORP measurement used as a reference
point for calculated PPM.
pH:
The current pH measurement used as a reference point
for calculated PPM.
Calibrating Temperature (Figure 19)
The
Temperature Calibration
window displays the follow-
ing items:
Hand Measure:
The manual temperature measurement to
be entered.
Current Measurement:
The current hand measurement.
Calibrate
the
Temperature Sensor
as follows:
1. Touch the window under
Measure
;
2. Enter the current temperature (by thermometer)
3. Touch Enter.
4. Return to the Calibrate Temperature menu and touch
OK. The change will be recorded along with the sensor
reading at the time the calibration was made.
NOTE:
Touch
Reset
to clear the calibration on this sensor.
NOTE:
In general the temperature sensor is very accurate.
Note, however, that the temperature error may vary depend-
ing on the time of day and the location of the sensor.
If the un-calibrated temperature reading is more than a cou-
ple of degrees off from the temperature by thermometer,
there is a problem. Common problems with
temperature
sensors
are listed below:
1. The Sensor may need to be moved and reinstalled.
2. The sensor may be damaged. If so, replace it.
• The temperature sensor should have a resistance of
10,000 ohms at room temperature (75° F).
• If water gets inside the sensor it will not work proper-
ly; inspect the cable for damage.
General (Figure 20)
The
GENERAL
setup window accesses the settings for the
Global Alarm & Delay, Overfeed Clear Time, Filter,
and
Power ON Delay
, plus a variety of buttons across the bot-
tom of the window to offer more features all described in
the following pages.
Use the directional arrows to highlight the settings. Touch the
Change
button to offer choices or to access keyboard input.
These settings must be entered correctly, as they are impor-
tant for calculating correct readings and troubleshooting.
Global Alarm %
: Sets the percentage above or below the
set point that will trip the alarm. This can be disabled in the
programming for each specific relay.
Global Alarm Delay:
The length of time the alarm waits
before activating the Alarm LED and pager. The
MPS
Wizard
uses this value as a default value.
Overfeed Clear Time 1:
When the current time matches
this time, the overfeed timers will be cleared and any
appropriate data saved.
Overfeed Clear Time 2:
When the current time matches
this time, the overfeed timers will be cleared and any
appropriate data will be saved.
NOTE:
Set both Overfeed Clear times the same to clear the
overfeeds just once a day.
Filter:
This value directly controls the digital filter’s time
constant. The larger the filter value, the slower the con-
troller’s response time. The smaller the filter value, the
faster the controller’s response time.
Power ON Delay
: The time lag between turning the power
ON and having any relays turn ON. If it takes a long time
for the sensors to adjust, increase the delay time.
Data Setup
– Press the
Data Setup
button to change the
Time Spacing on the keyboard window. Press
Sensors
and
the Sensors Setup menu appears. Sensors can be turned ON
or OFF by selecting the desired sensor with the up and
down arrows on the right of the window and pressing
Change
at the bottom of the Data Setup window.
Calibrate Temperature x
Hand Measure
78.7
Current Measurement: 72.3
Reset OK
Figure 19
General Setup
x
Global Alarm %
:25
Global Alarm Delay
:600
Overfeed Clear Time 1
00:00:00
Overfeed Clear Time 2
00:00:00
Filter (Higher is less)
:15000
Power ON Delay
00:00:00
DATA SETUP
Modem
CHANGE
Figure 20
