Galvanic Applied Sciences Monitek AT3, Руководство по эксплуатации и установке

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MODEL AT3 2 – 1
SECTION II – INSTALLATION
SYSTEM INSPECTION
Check to ensure that all components of the AT3 monitor have arrived safely. Included should be: the AT3
system electronics, sensor, and cable set. If there is any damage to the equipment or if anything
is missing, please contact the Monitek sales representative immediately. Fill in the first nine (9)
lines of the AT3 Installation Check-out Report on the last page of this section of the manual. Save
the packing material for future system storage or shipping.
POWER REQUIREMENTS
Ensure that the proper power is available at the installation site. The AT3 requires AC power voltage
range of 85-265 VAC single phase, 50/60 Hz. All power connections must be made to a properly
grounded power source to protect both the operator and the system. Be sure that the system
power is OFF before attempting to make any power Connections.
The power supply connection is made on the terminal strip at the lower right hand corner of the system
enclosure box. The terminal strip is labeled “L, G, and N” (Line, Ground and Neutral). Connect the
appropriate AC connections to L, G and N. The terminal strip is made to accept either fork or ring
terminals for easy connection. All connections should be routed through the sealing fitting on the
bottom of the system enclosure in order to maintain water tightness.
CIRCUIT BREAKER
The AT3 utilizes a 2amp slow blow thermal circuit breaker for added protection and convenience. If the
circuit breaker trips, reset it by pressing the reset button.
SENSOR INSTALLATION
Caution: Handle the sensor assembly with care. Rough handling could cause damage.
SENSOR LOCATION
Location of the sensor is very important! See Figure 2-1. It should be placed well downstream (ideally
greater than 10 pipe diameters) of any major flow disturbances, such as diaphragm or gate
valves, elbows, flowmeters, or pumps. Ultrasound demands a full pipe for best results; back
pressure valves downstream of the sensor can be used to throttle the flow if necessary. When
used in a sampling stream, isolation valves should be installed. The downstream valve should be
capable of providing back pressure to minimize bubble formation.
In order to prevent gas bubbles from becoming trapped on the transducer’s concave lens surface, it
should never be placed on top of the pipe pointing down into the fluid. There is no special
orientation for vertical pipe legs.
Mounting on vertical pipe legs is recommended for applications involving large amounts of suspended
solids. Flow in vertical pipe sections should be upward to prevent pressure drop and cavitation
caused by gravitational acceleration of the process liquid.