Residual:
When “resl” is selected, the analog output will send a 4-20 analog signal representative of the
residual value (4 mA being zero residual and 20 mA being full scale residual).
PO1:
When “PO1” is selected, the analog output will send a 4-20 analog signal representative of the
PID Control Program Process Output (4 mA being zero and 20 mA being PO1 full scale).
pH:
When “pH” is selected, the analog output will send a 4-20 analog signal representative of the pH
value (4 mA being zero pH and 20 mA being 14 pH).
Temp:
When “Temp” is selected, the analog output will send a 4-20 mA analog signal representative of
the sample water temperature (4 mA being 0º C / 32º F and 20 mA being 50º C / 122º F).
Turb1/Turb2:
When Turb1 or Turb2 is selected the analog output will send a 4-20mA analog signal
representative of the corresponding Turbidity reading.
NOTE: The AOX output calibration menus are accessed as detailed in the note on Figure 7.
AOX 4mA Cal:
This screen allows for calibration of the AOX 4mA output. Using a meter to read the
output, fi ne adjustments can be made using the
and
buttons.
AOX 20mA Cal:
This screen allows for calibration of the AOX 20mA output. Using a meter to read the
output, fi ne adjustments can be made using the
and
buttons.
Alarm:
This branch accesses the settings for the four alarm relays. (Relay 1, Relay 2, Relay 3, Relay 4)
Alarm Mode:
Select “Latching” or “Non-Latching”. A latching relay will require manual
acknowledgement of any alarm condition (by pressing the
button on the Main Operation Mode
screen). When Non-Latching is selected, alarms will clear themselves whenever the alarm condition no
longer exists.
Alarm Delay:
Enter desired delay time. Any alarm condition must then exist for this period of time
before tripping the relay. This delay can help avoid false alarms and is recommended to be set at 5
seconds or longer.
NOTE: The analyzer is equipped with four alarm relays. Each of these relays can be individually set to
represent any of the following alarm conditions:
1. Low Residual
2. High Residual
3. Turbidity 1 high alarm
4. Turbidity 2 high alarm
5. pH high/low alarm
6. Any alarm
DL:
This branch accesses the settings for the optional data logger.
On/O
ff
:
Depending on whether the data logger feature is enabled or disabled, this menu will present the
option to change the status.
Data Log Frequency:
Whenever the data logger feature is enabled, the frequency with which data is
recorded is adjustable on this menu.
Set New Date/Time:
If it is necessary to set or change the date and time in the data logger software,
select “YES” on this menu.
Set Data Log Clock:
This menu allows the date and time to be set. Whenever this menu is accessed,
the current date and time must be entered. A confi rmation screen will appear afterward.
19
Summary of Contents for 210 Series
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