Pacific Research Solutions TDS - Manual (Page 10)

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RO OPERATION:
The RO part of the unit has three LED indicators to identify the current mode of the controller. The following is
a list of the LED’s.
1. RO Operate
This indicates when the product level is low and the RO controller is operating. When the product level
is high and the RO is not operating, the “RO Operate” LED and the TDS display are turned off.
2. Low Supply
This indicates when a low supply pressure is occurring. A low supply pressure shutdown is displayed by
flashing the “Low Supply” and “Err” message on the display.
3. Flush
This indicates when a flush is in operation.
DISPLAY MODE:
The “Display Mode” button is used to select one of four items to display. Each of these items are identified by
the corresponding yellow LED indicators. Each time the “Display Mode” button is pressed, the display is
advanced to the next item. After the forth item, the display will rotate back to the first item. The following is a
list of the display items.
1. Probe 1-PPM
This measure conductivity probe 1 TDS in PPM.
2. Probe 2-PPM
This measure conductivity probe 2 TDS in PPM.
3. Probe 1-Temp
This measure conductivity probe 1 water temperature in degrees C or F depending on which mode has
been selected.
4. % Rejection
This measures both conductivity probes 1 and 2 and calculates the percent rejection of TDS in a system,
RO system. When using this feature, conductivity probe 1 should be used as the product water or post
treatment probe and conductivity probe 2 should be used as the feed water or pre treatment probe.