Greyline Instruments DFS 5.1, Руководство пользователя

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Page 5
DFS 5.1 Doppler Flow Switch
CONNECTIONS :
SENSOR : Connect one sensor
coaxial cable to the Rx and GND
terminal block, and the second sensor
coaxial cable to the Tx and GND
terminal block. Tx and Rx are the
solid core of each coaxial cable, and
GND is the stranded shield of each
coaxial cable. (See page 17 for coaxial
cable preparation).
POWER INPUT : Connect 115VAC
50/60Hz to the LINE, NEUTRAL and
GROUND terminals. Do not apply
power until sensor connections have
been made.
Note
Tx = Transmitter
Rx = Receiver
Nc = Normally closed contacts
No = Normally open contacts
C = Common
ADJUSTMENTS
:
Bar Graph
Display
The green LED’s indicate flow velocity. The red
LED indicates relay energized see chart for
calibration.
Relay Trip Point Insert shorting link at the flow rate indicated by
the bar graph display. A second link can be
inserted to provide a relay deadband.
Alarm State Select high flow alarm or low flow alarm by
inserting the shorting link.
Relay Drop-out
Delay Adjust delay in 5 second increments to prevent
relay chatter on intermittent flow.