APG DCR-1004 user manual - Manual (Page 9)

Rev. A3, 10/08 DCR-1003 and DCR-1004
9
Automation Products Group, Inc.
APG...Providing tailored solutions for measurement applications
Tel: 1/888/525-7300 • Fax: 1/435/753-7490 • www.apgsensors.com • [email protected]
Stilling Well Mounting
Provides access to difficult areas and eliminates problems with foam.
• Extend the pipe above the highest anticipated level by at least the
published blanking distance.
• Provide a vent hole at the top of the tube. Keep the hole inside the blanking
distance of the sensor to prevent false echoes.
• Use only in liquid materials that will not leave deposits on the inside of the
pipe (material build-up will result in false echoes).
• Pipe must have smooth walls and should be seamless to provide a smooth
path for the sound waves to propagate into the tank. Because the sound
waves will concentrate along the inside wall of the pipe, any seams from
couplers, nipples, and welds will cause echo returns that will be picked up
by the sensor.
Minimum Blanking Distance
Highest Anticipated
Tank Level