Xylem 704 PUMP CONTROLLER - Manual (Page 10)

10
Electrical Connection
Electrical connection of the pump controller for hydrostatical and ultrasonic measuring systems respectively.
Hydrostatic Measuring System
Supply Relay 1-4 0-20/4-20mA
Ultrasonic Measuring System
Supply Relay 1-4 0-20/4-20mA
Ultrasonic sensor
Pressure transmitter
Internal Adjustments
Level measurement
The Pump Controller 704 is factory pre-set for level
measurement and pumps or valves control.
Zero point, span and response time
The Pump Controller 704 is factory pre-set for level
measurement in water. The response time is set to
minimum at delivery. When replacing the transmitter or
when using the 704P for differential level measurement or
measurements in pressure or vacuum tanks, it may be
necessary to reset both the zero point and the span. The
resetting is carried out by simulating the zero point and
the span. Depending on the use, it may also be necessary
to reset the response time. If the pump controller is used
in liquids with a specific gravity different from that of water
(e.g. sludge), the span will need to be adjusted.
If the pump controller 704U is used in water with foam or
uncalm surfaces, it might be nescessary to adjust the
gain. + -
4-20 mA to
power supply
Connection Box for transmitters
Connection box 202922 is used for outdoor connections
of cables from the pressure transmitter. The box is made
of ABS plastic, and the housing meets IP65. The box is
ventilated in consideration of the tube for pressure
equlizing. This allows the cable to be extended with
ordinary installation-cable from the box.
Connection box 200590 is used to connect the ultrasonic
sensor with cable.
The connection boxes have a plug for connection of an
indicator. When the indicator is applied the lid is replaced
with a display.
Electrical diagram
Soldering bridge "Display" (indicator)
Soldering bridge "Connected up in series"