Pacific Research Solutions TDS - Manual (Page 11)

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ALARM POINTS:
The TDS monitor has 5 alarm points. These are items that can initiate an alarm. Each alarm point can be
individually enabled and set to a limit value, see the above section on system setup. The five item are as follows.
1. Probe 1 TDS in PPM high limit
2. Probe 2 TDS in PPM high limit
3. Probe 1 Temperature high limit
4. Probe 2 Temperature high limit
5. Percent Rejection low limit
When an alarm condition is detected on probe 1 or 2 the “Probe 1-Alarm” or “Probe 1-Alarm” LED indicator
will light. Once the Alarm relay delay time has expired, the “Alarm Relay” LED indicator will light along with
energizing the relay. In this mode, the appropriate alarm point LED indicator (i.e., Probe 1-PPM) and display
value will flash at a 1 second rate. If you choose to select another displayed item, the above indicator will stop
flashing until you return the display to that item. If the alarm relay is in the latching mode and the alarm
condition goes away, the “Probe 1-Alarm” or “Probe 1-Alarm” indicator will go out but the “Alarm Relay”
indicator will remain along with the flashing alarm point.
The alarm for Probe 2 temperature is not displayed on the front panel but this alarm is still available. If you
choose to use this alarm, when the alarm occurs the alarm relay and LED will function normally but this actual
alarm will not be identified.
ALARM RESET:
There are two methods to reset a latched alarm relay condition. The first method is to turn the power to the
monitor off for 1 or more seconds and turn back on. The second method is to press the “^“ and “v“ buttons at
the same time while in the display mode. It should be noted that the alarm relay condition will return if the alarm
condition itself is not cleared before reset. This method is also used to manually reset the low supply pressure
alarm.