Pacific Research Solutions TDS - Manual (Page 3)

3DFLILF 5HVHDUFK
'XDO 7'6 0RQLWRU  52 &RQWUROOHU  8VHU 0DQXDO

3DJH 
7'6052'2&
,167$//$7,21
MOUNTING:
The Dual TDS Monitor is design to be panel mounted. Use the drawing in the end of this manual to make any
necessary holes and cutouts in your panel. Use the supplied fasteners to mount the monitor to your panel.
Carefully plan your installation. Do not mount the controller where it is directly exposed to water. The front of
the enclosure is water resistant, however the rear of the controller is NOT water resistant. If you choose to
mount the controller onto the front of a NEMA enclosure, use a small amount of silicon glue between the
monitor enclosure bezel and the NEMA enclosure to make a water resistant installation.
POWER REQUIREMENTS:
The Dual TDS Monitor has many operating voltages depending how it was ordered. Check the rear panel of the
monitor for the correct operating voltages. The following is a list of available voltage. External transformers are
available for low voltage operation.
•
9 to 14 volts AC or DC and requires up to 500mA (3 watts).
•
20 to 26 volts AC and requires up to 300mA.
•
115 volts AC and requires up to 100mA.
•
230 volts AC and requires up to 50mA.
CONNECTIONS:
All connections should be made with the power turned off. Double check your connections before turning on the
power, incorrect connections may permanently damage the monitor. If you are not sure about a connection, do
not hesitate to contact the factory. The terminals on the rear panel are designed to accommodate wire sizes up
to 18 AWG. Make sure you correctly size the wires for your connections.
•
Power: Use the factory supplied transformer when available. If you are providing power directly, make sure
that it is in the proper range as listed on the rear panel of the unit. When using DC, it is not necessary to be
concerned as to which terminal to connect the positive supply. Connect the power supply to the terminals
marked “L” and “N” under the “Power In” marking. For proper operation, make sure that a good earth
ground is attached to the terminal marked “G” under the “Power In” marking. Without proper grounding,
you may have problems with probe plating or erratic reading.
•
Conductivity Probes: You may connect the conductivity probe to either or both of the PROBE 1 and/or
PROBE 2 inputs. In an RO application, PROBE 1 is reserved for the product water probe and PROBE 2 is
reserved for the feed water probe. This will allow for correct reading of the percent rejection. Attach the
white wire (temperature compensation) to the terminal marked “W”. Attach the black wire (conductivity
cell) to the terminal marked “B”. Attach the cable shield or common to the terminal marked “G”. Do not
use a probe extension cable in excess of 25 feet. A longer cable will degrade the accuracy of the unit.
•
Alarm Relay: The alarm relay has 10 amp contacts that are marked on the rear panel as “NO” (Normally
Open), “NC” (Normally Closed) and “C” (Common). You may use this contact for voltages up to 125 volts
AC. The normally closed contact is closed when there is no error and will open on error or alarm.
•
Cable Length: Once the monitor has been installed, it is important to enter the length of the conductivity
probe cable into the appropriate system setup menu. See the next section for more details on this adjustment.