22 Ultrasound Controller Manual
Transparent MS-polymer (modified silane polymers, also called SMP or STP or STPE) can also
be used instead of silicone sealant. Searching on google gives many results like MSPT.K290. It is
environment friendly but does not endure as high temperature as silicone sealant. Like silicone
sealant it takes some days to cure.
Hard glues should be avoided since they can come loose by temperature variations.
If the Level Switch is not glued, Electrolube Heat Transfer Compound can be used. It does not
cure so the Level Switch must be held in place by other means. If the Level Switch is removed,
the old compound should be wiped off and new used next time. These compounds are not
recommended at temperatures above 60C.
Level Switch RS can only be used with the technique WR and gluing the Level Switch RS with
silicone sealant or MS-polymer is essential.
Stainless Steel and Glass Containers
When the Level Switch is mounted on a stainless
steel or glass container and the echo-technique is
used, it is advisable to also attach a sound
absorbing tape on the container. The tape will
supress unwanted sound travelling along the
container and thereby improve the measurements
(the Edata will be lower with air, making threshold
Ethd also lower, which is good). The 3M tape
SGH12 or 8671 is suitable for this purpose. It
withstands high temperature 135°C. The tape is
transparent and can be removed without leaving any trace. The picture shows the tape with the
protective paper still attached. It should be placed centered over the Level Switch and go around
the container, starting and ending near the Level Switch. The important area to cover is about
100mm on each side, close to the Level Switch. On a big container, if the tape is too short, it can
be cut in two pieces and placed on each side of the Level Switch. The tape is 51mm wide and one
tape should be used for each Level Switch. Attaching tape above or below the Level Switch does
not help. The tape is supplied with the Level Switch in 500mm length and can also be ordered
separately from AQ M-Tech, order number 101310. The material is polyurethane. Acetone should
not be used for cleaning the tape.
Level Switch start-screen
When power is applied, the Level Switch start-screen is displayed showing Lev Sw on first line
to the right signifying this is Level Switch start-screen. . On the second line to the right is written
1234 which shows the state of each of the four relays. A dark background signifies a closed
relay.
To the left are four small digits signifying Level Switch 1 2 3 and 4 with three-letter-text following
each digit showing information about each Level Switch:
AIR air is detected
LIQ liquid is detected
cal Waiting for calibration of Air and/or Liquid
set parameters need to be set
-- Level Switch disconnected
err error – see troubleshooting
™™™ Level Switch is not existing
To Next Page
Loading...
Need help?
General